Java Jobs

I’m planning to launch a brand-new social networking experience focused exclusively on Android users and I need a skilled developer—or team—to turn the concept into a fully functioning app. Scope of work The job covers everything from initial architecture through Play Store release. You’ll be responsible for designing the UI/UX, building the front-end in Kotlin or Java, creating the back-end (Firebase, Supabase, or another cloud backend you’re comfortable with), and integrating standard social features such as real-time chat, user profiles, newsfeed, push notifications, and media uploads. Clean, well-documented code and a modular structure are essential so the project can scale or later be ported to iOS. Deliverables • Interactive high-fidelity mock...

I have an existing Android APK but no accessible source code. I need the app fully de-compiled, cleaned up, and re-assembled so I can continue development. Once the codebase is restored, I’ll want a few targeted edits—mostly refactoring and minor feature adjustments that we’ll clarify together after you review the decoded project. What I expect from you: • Produce a readable, gradle-based Android Studio project reconstructed from the current APK. • Implement the agreed code changes, then compile and deliver a fresh, working release APK plus signed debug build. • Document every modification so I can pick up future work without hand-holding. You’re free to use jadx, apktool, or any equivalent reverse-engineering toolchain as long as the final pr...

I’m expanding my agency’s engineering capacity and need a senior-level developer who can take full ownership of system architecture while still being hands-on with code. The immediate mandate is to design, build, and maintain production-ready applications for multiple clients, weaving AI-powered features and automation into scalable, resilient back-ends. Primary focus System architecture is the heart of this role. You’ll translate business requirements into technical blueprints, choose the right patterns, and implement them end-to-end—covering data models, service boundaries, CI/CD pipelines, and observability. Daily work you’ll lead • Crafting and reviewing architecture diagrams and technical specs • Coding core services in Python, front-end...

please read the attached files for full details there is some details that i coudnt add for know there will be a video the show everything if we reach agreement later My budget is fixed so please dont wate my time my budget is below 300$ and payment after finishing only who want to work with me messege me please

I’m putting together a corporate head-count tracker and I want to move quickly from concept to a secure, production-ready application. The backend will run on Spring Boot; the frontend needs to be available both as classic HTML/CSS/JavaScript pages and as a richer React interface, so we can serve different devices and gradually migrate stakeholders toward React. Security is essential. I need full user authentication with clear role separation—Admin and User—implemented with Spring Security (JWT or another proven token strategy). Beyond wiring the login flow, I also want advice on best-practice password storage, CSRF protection, and anything else you see fit to lock things down. Where I need your help: • Designing the Spring Boot architecture, setting up entities, r...

I need a full-function Android social networking application built from the ground up. The core idea is simple: let users create accounts, build a profile, connect with others, and share content in real time. I’m looking for a clean, modern UI that takes advantage of native Android components, built with Kotlin or Java in Android Studio, and underpinned by a solid, scalable backend (Firebase, Supabase, or your preferred equivalent). Key goals • Smooth onboarding: email, phone, or third-party sign-in • Personal profiles with editable photo, bio, and basic stats • Post feed supporting text, images, and short video • Real-time likes, comments, and push notifications • In-app messaging or chat to keep conversations flowing • Lightweight admin dash...

I need a Python-based trading program that plugs directly into the Zerodha Kite API and runs end-to-end on live Indian equity and F&O markets. The code must handle three pillars inside a single, well-structured repository: • Automated trading – place, modify, and cancel orders programmatically (market, limit, SL). The engine should be able to run multiple strategies concurrently and execute through Zerodha’s regular and MIS product types. • Market analysis – fetch historical and live tick data, calculate technical indicators on the fly (you’re free to use pandas, numpy, TA-Lib, or your own functions), and generate entry/exit signals according to parameters I will supply. • Risk management – position sizing, max daily drawdown, per-trade s...

AI Assistant Feature Project Description: We are developing an AI Assistant Android app that currently works fine when it’s in the foreground, but stops responding in the background We need an experienced Android and Java developer who can implement a background service or foreground notification-based system so that: The AI assistant continues to run even when other apps are open. It can receive and execute commands from notifications or voice input while running in the background. The app should maintain minimal battery usage and comply with Android’s background execution limits (Android 10+). Key Requirements: Strong experience with Android Services (Foreground Service, WorkManager, BroadcastReceiver, etc.) Java-based Android app expertise (Kotlin is a plus) ...

I have an existing code-base that needs to be compiled, configured, and deployed on a CentOS 7 server. The stack spans several languages (the repository mixes Java, Python, a bit of C++, and some PHP utility scripts) so I need someone comfortable moving through polyglot projects without breaking stride. The immediate goal is a repeatable deployment: building the artefacts, resolving library dependencies, wiring in systemd service files, and validating that everything starts cleanly after a reboot. You’ll work directly on my CentOS 7 instance (SSH access provided) and document any package or kernel-level tweaks you make so I can reproduce the setup on staging and production later. Because the code also ships to a small cross-platform client, part of the task is ensuring nothing ...

Role: Software Developer / Technical Partner (Equity Opportunity) I am looking for an experienced software developer to join me as a technical partner on the development of an AI-integrated desktop application, from MVP through to initial launch. This is not a contract-only role. For the right person, there is an opportunity to take on a meaningful equity stake, reflecting long-term involvement in architecture, implementation, and product evolution. The product is a stateful, non-trivial application that integrates AI as an interactive system component. It requires careful data modelling consistency management, and thoughtful UX for extended use. This is not a marketing website or a thin wrapper around an API. Core requirements: Experience building desktop applications (Electron, Tauri, ....

Job Description: Scala / Groovy Developer (Maven, Datadog Dashboard) Duration: 4 Hours Budget: ₹600 per Hour Role Overview We are looking for a Scala/Groovy Developer with Maven build experience to support two focused tasks involving application setup and monitoring dashboards. Key Tasks Scala & Groovy with Maven Work on existing Scala and Groovy-based codebase Handle Maven configuration, dependency management, and build setup Ensure smooth compilation and execution of the project Datadog Dashboard Creation Design and configure dashboards in Datadog Visualize key application and system metrics Ensure dashboards are clear, actionable, and aligned with monitoring needs Required Skills Strong hands-on experience with Scala and Groovy Good knowledge of Maven Experience creating and manag...

The project centres on building a production-ready text-classification pipeline that leverages modern deep-learning techniques. I have a labelled dataset and need end-to-end code that ingests the text, handles cleaning and tokenisation, and trains an accurate classifier. Python is the preferred language; using PyTorch, TensorFlow or another mainstream framework is fine as long as the solution is reproducible and easy to extend. Key deliverables: • Well-commented source code (data loading, model, training loop, evaluation) • Clear instructions to run training on a fresh machine (README or notebook) • Metrics report showing accuracy, precision, recall and F1 on a held-out set • Exported model weights and a small inference script or API endpoint for batch prediction...

SENIOR SOFTWARE ENGINEER CISCO LTD July 2025 - Now Project Description: RAIDN is an enterprise-grade project portal developed for CISCO to manage, monitor, and streamline internal project workflows, data processing, and user interactions across multiple teams. The platform is built using a microservices architecture to ensure scalability, high availability, and performance. Roles & Responsibilities: Designed and developed scalable backend microservices using Java and Spring Boot, following RESTful and domain-driven design principles. Implemented microservices architecture with inter-service communication and centralized configuration. Developed event-driven workflows using Apache Kafka for asynchronous data processing and system decoupling. Integrated Redis caching to improve applicati...

I’m building a nonprofit smart-locker network and need a developer to stand up the entire backend plus a lightweight web dashboard. The lockers will be opened only after a biometric match—ideally fingerprint or facial recognition—so the API you create must handle secure enrollment, matching, and audit logging without ever storing conventional IDs, phone numbers, or payment data. Core requirements • RESTful (or GraphQL) API hosted on AWS, with a clean data model for lockers, users, and biometric templates • Biometric logic that can accept fingerprint or facial recognition data, hash it securely, and return match / no-match results in under two seconds • Automatic locker assignment, occupancy tracking, and remote release commands, exposed through a sim...

I need an Android educational app deployed in kiosk mode onto device for a prototype. The app features an AI assistant that responds to voice commands with a graphic interactive face. Key Requirements: - App to be set up in kiosk mode - Back end suggestion and gemini api integration. Ideal Skills: - Experience with Android kiosk mode - Background in educational app development - Proficiency in integrating AI voice command functionalities

Schwab API Execution Hardening – 2 Week Contract I’m completing a nearly finished Python trading system (“Hyperion”) and need a senior execution-focused engineer for final hardening and validation. This is NOT a strategy build. This is broker execution stabilization. System Context: • Schwab API integration • Cash account only • Single-leg options only • No spreads • No margin • GUI guardrails implemented (contract limits, capital caps, DTE filters, one position per symbol) • 80–90% complete Scope: • Validate OAuth refresh logic • Harden order submission (idempotency, duplicate prevention) • Confirm proper order lifecycle handling • Implement position reconciliation checks • Add structured logging &bu...

Need help writing a 3-line script in Oracle 4GL based on pseudo logic related to VEE rules and VEE group. The deliverable is the script only, as testing and documentation will be handled separately.

I want to develop inside IntelliJ IDEA while all compute happens on runpod.io. The goal is a clean Remote Development Environment setup that lets me open the project locally, yet run, debug, and test code on a RunPod container with zero friction. My day-to-day work is mostly Python, and there’s also a Java web-application module I need to keep compiling and serving. I need you to: • Spin up or pick a suitable RunPod image that includes the required Python tooling and a compatible JDK. • Enable secure, persistent SSH access (or JetBrains Gateway) so IntelliJ connects every time without manual tweaks. • Create IntelliJ run/debug configurations for both Python scripts and the Java web app, verifying that breakpoints, unit tests, and console output all work remotely....

I’m ready to bring my online store to Android and need a talented developer who can translate a straightforward e-commerce concept into a smooth, modern mobile experience. Because I’m starting with Android only, the build should be fully native (Java / Kotlin) or cross-platform so long as the Android release is polished and Play-Store-ready. Scope • End-to-end development of the Android app—from clean architecture and intuitive UI right through to final deployment. • Core e-commerce flow: product browsing, cart, checkout, and secure payment processing. (If you have proven plug-ins or gateway SDKs you prefer, let me know; I’m flexible as long as PCI-compliant options are in place.) • Admin-friendly integration so I can add or update inventory wi...

We are launching a gamified, project-based platform that empowers teams to solve environmental, social, and economic challengese. To move from concept to scalable reality, we hands-on AI project an architect who can help us implement our AI strategy. The ideal resource will be a MEAN stack/Python developer. You will be helping us create and implement the following: • An adoption roadmap that ties specific AI capabilities to each stage of our workflow and project milestones, showing where automation, prediction, or generative content delivers the most value. • A reasoned “why this, not that” selection of tools—think Hugging Face transformers versus OpenAI GPT-4, TensorFlow or PyTorch for model training, spaCy for NLP, Vision APIs for image tasks—plus ra...

I'm looking for an experienced developer to create an algorithmic trading application for the stock market, specifically using trend following strategies. The application needs to connect with NSE. Key Requirements: - Develop trend following trading algorithms - Integrate application with NSE - Ensure real-time data processing and analytics - Implement risk management features Ideal Skills and Experience: - Strong background in algorithmic trading - Proficiency in financial markets, especially equities - Experience with NSE APIs and trading platforms - Expertise in programming (Python, Java, etc.) - Solid understanding of risk management and trading strategies Please provide relevant experience and examples in your bids.

Project Overview The project is an e-commerce website called Souq American. The platform is already developed locally and we are now preparing it for production deployment. Current Technology Stack Frontend: Angular Backend: Java with Spring / Spring Boot (REST APIs) Database: MySQL Cloud Provider: Amazon AWS Containers: Docker CI/CD: Jenkins Version Control: Git / GitHub Current Status Frontend and backend applications already exist APIs are implemented Database schema is designed The main focus now is deployment, infrastructure setup, and automation Main Responsibilities for This Role Understand the existing frontend and backend architecture Assist with deploying the application to AWS (EC2, security groups, environment setup) Containerize frontend and backend using Dock...

Project Description We're looking for an experienced developer to build a fully automated poker bot that can play in free online poker tournaments (play-money / freerolls). This is a research and hobby project — not for real-money play. The system needs to combine game theory optimal (GTO) strategy with exploitative adjustments based on an expert human player's decision-making framework that we will provide. The bot should be able to join a table, read the game state visually, make decisions, and execute actions — all autonomously. What We're Building (3 Core Systems) 1. Poker Decision Engine (The Brain) Implement a GTO baseline strategy using frameworks like OpenSpiel, PokerRL, or equivalent Build an exploitative layer on top that adjusts based on opponent tend...

1 Product & Inventory Management 1.1 Product Master Create, edit, and manage products Product categorization Product status (active/inactive) Mapping with brand, tax, and attributes 1.2 Brand Master Manage product brands Brand-wise reporting support Assign brands to products 1.3 Tax Master Define multiple tax structures Support percentage and fixed tax Tax mapping with products and transactions 1.4 Item Master Item-level inventory management SKU / item code handling Unit of measurement Opening stock and stock valuation 2 Supply Chain & Operations 2.1 Supplier Master Supplier creation and maintenance Contact, address, and tax details Supplier-wise purchase history 2.2 Trade Agreement Management Supplier-specific pricing agreements Validity period for agreemen...

I’m building a lightweight yet polished video player for Android that feels as snappy as MX Player. The essentials are straightforward: it must play local MP4, AVI, and MKV files flawlessly and let the viewer load and switch subtitles without hiccups. A clean, modern look matters to me, so please wire in theme customization (at minimum light and dark, with room for future accents). I’m not asking for streaming, gesture navigation, or custom button layouts right now—those can stay on the wish-list until the core experience is rock-solid. I’m fine with ExoPlayer, Media3, or a comparable native library as long as you keep the codebase modular (Kotlin preferred, Java acceptable) and target the latest stable SDK. Smooth seeking, orientation changes that don’t...

I Need an Advanced Automation Developer – Redirect-Based Booking Bot (Goethe, Wicket Apache, COE Session Handling) For Goethe Booking like Chennai and Bangalore I am looking for a high-level automation/bot developer who has experience with: Wicket/Apache-based web applications Multi-step redirect chains COE session initialization & dynamic token handling ColdFusion (CFID/CFTOKEN) & JSESSIONID flows Cookie extraction & accurate replay of Set-Cookie across redirects Chrome CDP automation / Playwright / Puppeteer High-speed DOM watching (DOMWatcher / MutationObserver) Proxy rotation & session isolation --- Project Goal Build a bot that can open the “Select Modules / Book” page reliably during Goethe exam seat drops, even when: normal browser at...

I’m building an Android-only sports application that focuses on delivering fresh match highlights to fans and alerting them the moment a new clip is available. The core of the project is straightforward: smooth video playback, a clean Material-inspired interface, and reliable real-time notifications. Here is what the finished product must do: • Install on Android 10+ and present a scrollable feed of recent highlights pulled from my existing JSON/CDN source. • Stream each clip in HD without stutter and allow basic share functionality. • Trigger push notifications (Firebase Cloud Messaging or a comparable service) within seconds of a new highlight being published. • Follow best practices for maintainable, modular code so I can layer in live score updates or player ...

Project Overview I have an Android gaming application called TaskTrophy which is live on the Play Store. The app is a WebView-based application where the game logic (Ludo, Sudoku, Quizzes, etc.) is hosted on a remote server (Hostinger) using PHP and JavaScript. I have implemented AdMob Mediation with Meta Audience Network and Unity Ads, but I am facing critical issues: Low Fill Rate: Only 1 or 2 ads show out of 10 requests. Mediation Errors: AdMob Inspector shows "No secure signal found" for Meta and "Bidder returned client error" for Unity. Bridge Issue: I need a reliable way to trigger Reward Ads from my hosted JavaScript/PHP game logic when a user finishes a game trial. Technical Stack Backend: PHP (Hosted on Hostinger) Frontend: JavaScript / HTML5 Games Android: Nat...

I am ready to purchase a fully developed Teen Patti (3 Patti) game that already runs smoothly on Android devices. The ideal package lets me open it in Android Studio, build without errors, and publish under my own account. Before we move forward, please send me a playable APK or brief screen-recorded video so I can confirm stability and gameplay quality. I also need written assurance that the source code and assets are either your original work or you have full resale rights. Deliverables on handover: • Complete Android Studio project with all source files, assets, and any server or database scripts required for live play. • Clear setup instructions so I can compile and deploy the game myself. • Transfer of usage and distribution rights. Payment will be released once I ha...

I’m working on a college assignment that requires a fully-functional Hospital Management System, and I’d like an experienced developer to code it end-to-end for me. My current stack preference is Java (JSP/Servlet) with a MySQL back-end, but if you know a more suitable, equally portable web technology I’m open to hearing why it would be a better fit. The application must revolve around solid data management. That means every piece of information—patients, doctors, appointments, billing, and records—needs to persist reliably in the database and be easy to retrieve through search, filters, and reports. Role-based logins are compulsory for Admin, Doctor, and Patient. Each role should see a tailored dashboard that exposes only the actions relevant to that user t...

Project Overview I have an Android gaming application called TaskTrophy which is live on the Play Store. The app is a WebView-based application where the game logic (Ludo, Sudoku, Quizzes, etc.) is hosted on a remote server (Hostinger) using PHP and JavaScript. I have implemented AdMob Mediation with Meta Audience Network and Unity Ads, but I am facing critical issues: Low Fill Rate: Only 1 or 2 ads show out of 10 requests. Mediation Errors: AdMob Inspector shows "No secure signal found" for Meta and "Bidder returned client error" for Unity. Bridge Issue: I need a reliable way to trigger Reward Ads from my hosted JavaScript/PHP game logic when a user finishes a game trial. Technical Stack Backend: PHP (Hosted on Hostinger) Frontend: JavaScript / HTML5 Games Android: Nat...

My web application is already live, backed by Supabase and managed through a GitHub repository. The next milestone is a fully native mobile experience—Swift for iOS and Kotlin (or Java) for Android—mirroring the core web-app workflow without compromising performance or security.

I maintain a Node.js / TypeScript code-base that submits Jito bundles to the Solana network at high frequency. The current version works, yet under heavy load it saturates network bandwidth, slows slot confirmation, and leaves a larger attack surface than I’m comfortable with. I’d like you to jump in, profile the pipeline, and return an implementation that is measurably better across three axes—performance, scalability, and security. What performance means here is simple: bundles must reach the leader faster so more of them land profitably. I’m especially keen on lowering the chatter between my service and Jito’s relays so network bandwidth is used far more efficiently. You’ll have full access to the existing TypeScript modules, aggregator logic, and t...

I want a small-scale desktop application built in Java that I can dissect later for study. The core requirement is a clean Swing interface that performs the usual Create, Read, Update and Delete operations against a MySQL database. Think of something like a simple student, product or book manager: one main window with a table view and modal forms for adding or editing records. Please keep the code readable and tutorial-friendly. Inline comments that explain the reasoning behind key sections—especially JDBC connections, prepared statements, and event handling—are essential. Include a concise README that tells me how to import the project, run the SQL script to create the tables, and launch the application. Deliverables • Complete Java source code organised in packages &...

Three finished Android apps are ready for their final enhancement: integrating a hosting layer so user data and media can live on a reliable back-end instead of locally on the device. All UI assets, icons, and existing source code are packaged and waiting in the repository; the work now is purely feature addition, not bug fixing or UI tweaks. Scope of work • Choose or configure a hosting solution (Firebase, AWS, or any lightweight VPS—whichever fits best). • Wire the back-end to each app so login, uploads, and simple read/write actions pass through tested API calls. • Update the project settings, build files, and pro-guard rules where needed. • Provide clear build instructions and a short “read-me” detailing endpoints, keys, and deployment ste...

I’m arranging a series of one-hour classes that blend hardware design (VLSI and PCB) with software development in Python and Java. My students sit at an intermediate level in both languages, so each session must go beyond basics and dive straight into advanced concepts, hands-on coding practice, and a mini project component we can build on from week to week. On the hardware side, I’d like you to break down VLSI and PCB workflows in the same practical style—show the design flow, demonstrate essential simulation or testing steps, and connect theory to real-world use cases that spark curiosity. Key details • Format: live, one-hour interactive class (screen-share, white-board or live IDE). • Pace: concise explanations followed by immediate demos or coding walk...

I already have the full AOSP source checked out and the proprietary blobs for a piece of dedicated in-vehicle hardware. What I need now is an Android engineer who has been through the full custom-ROM cycle before and can take the lead on turning that raw tree into a production-ready build. Scope of work • Strip every trace of Google Mobile Services and replace only what is strictly necessary with open-source or in-house components. • Harden the system: SELinux in enforcing mode, verified boot, secure default props and permissions, plus any kernel-level mitigations you normally deploy. • Update or create the device tree and BoardConfig so the microphone, speakers, Bluetooth and the built-in camera work flawlessly; the unit does not rely on a touchscreen, so please make...

I’m ready to turn my idea into a fully-functional Android application and need a developer who can guide the process from concept to Google Play release. At this stage I have the core concept and a handful of rough sketches; what I need now is help refining the user flow, designing an intuitive interface, building the backend logic, and packaging everything into a clean, well-tested APK. You’ll be working exclusively for the Android platform, so familiarity with current SDK versions, Kotlin or Java, Android Studio, and the play-store submission process is essential. If you can also advise on best-practice architecture (MVVM, Clean Architecture, Jetpack components) and integrate common services such as Firebase or in-app billing, that’s a plus. Please let me know: ...

I need a backend engineer to turn my spec into an MVP that exposes a clean, API-first trust and reputation service for autonomous AI agents. The entire product lives server-side—no front-end work at all—so every feature must be reachable through intuitive, well-documented endpoints. Core requirements • Stack: your choice of FastAPI (Python) or Node (TypeScript), backed by Postgres, containerised with Docker, and wired to Stripe for billing events. • Auth: simple, robust API Key flow; keys must be generated, stored, and validated on every request. • Scoring logic: compute each agent’s trust score solely from its interaction history, according to the formulas in the spec. Performance metrics or direct user feedback are outside this first iteration. ...

I run the software division of a growing technology company in خميس مشيط, المملكة العربية السعودية, and we are expanding our in-house engineering team. The immediate need is for highly experienced programmers from India, Pakistan, Bangladesh, or Sri Lanka who can relocate and work onsite with us on a full-time basis. The work spans end-to-end product development: planning features with our product managers, writing clean and well-documented code, performing peer reviews, and shipping stable releases on a regular sprint cycle. We handle both web and mobile solutions, so a strong command of at least one modern back-end language (Java, Python, Node.js) and a front-end framework (React, Angular, or Vue) is essential. Familiarity with RESTful API design, Git-based workflows, and cloud deployme...

I’m looking to have a commercial-grade loan origination system built that centres on risk assessment and underwriting. The platform must comfortably process both Business and Real Estate loans from first touch through credit decision, so workflows, data models and scoring logic should be tailored to those two products. Core scope The heart of the build is an automated underwriting engine―collecting applicant data, applying credit policies and spitting out decisions or stipulations in a clear audit trail. Everything else (intake forms, document upload, status tracking) should orbit that engine so our credit team can step in only when a manual override is needed. Deliverables • A web-based application with separate workflows for Business and Real Estate loans • Config...

We are looking for an experienced Android developer to help us build and customise a ROM based on AOSP for specific Android devices eg a car android interactive display with sensors. Tasks include modifying the AOSP source, removing Google services, applying security-focused tweaks, and ensuring stability. Experience with kernel-level changes, device trees, and OTA update integration. Please apply only if you have hands-on experience with AOSP builds and custom ROM development.

I need the pin-to-keep behaviour added to my existing Android text-clip list. A user should be able to touch-and-hold any text clip in the RecyclerView; that gesture toggles a “pinned” state. Pinned clips remain in the local Room/SQLite store indefinitely, while every unpinned clip should be purged exactly one hour after its creation time. I’m fine with the standard Android UI conventions—think long-press selection, a pin icon in the contextual action bar, and a small pinned indicator inside each row. No custom assets are required beyond the built-in Material icons. The current codebase is Kotlin, minSdk 24, using ViewModel + LiveData. Please stay within that stack. If you see a cleaner Jetpack-recommended way to schedule the one-hour expiry (WorkManager or AlarmM...

I want to launch an Android-only application that showcases property listings and layers in practical AI assistance to make the experience smarter for both managers and renters. At its core the app must let a property manager add, edit, and remove listings (images, price, availability, basic details). The AI component should work behind the scenes—think auto-tagging amenities from photos, suggesting competitive pricing ranges, or surfacing the most relevant homes to a tenant based on their previous in-app behaviour. I’m open to the exact technique you use (TensorFlow Lite, ML Kit, embedded models, or a lightweight cloud call), so long as it stays responsive on typical mid-range Android devices. No third-party property-management or CRM integrations are required; the app should...

I’m building a Spring-based service router and need robust CSRF protection on all API endpoints. The idea is to leverage Public Key Infrastructure so that every incoming request carries a verifiable, signed token before it reaches any controller logic. Here’s the core of what I’m after: • A Spring Security configuration (Boot-compatible) that intercepts every request—GET, POST, anything—and checks a PKI-backed CSRF token. • A lightweight way for upstream services or clients to obtain and refresh that token; we can refine the flow together once you see my current architecture diagrams. • Server-side validation that ties the token to the session (or an equivalent stateless approach) so replay attacks are blocked. • Clean, readable ...

I’m ready to turn my idea into a fully-functional Android application and need a developer who can guide the process from concept to Google Play release. At this stage I have the core concept and a handful of rough sketches; what I need now is help refining the user flow, designing an intuitive interface, building the backend logic, and packaging everything into a clean, well-tested APK. You’ll be working exclusively for the Android platform, so familiarity with current SDK versions, Kotlin or Java, Android Studio, and the play-store submission process is essential. If you can also advise on best-practice architecture (MVVM, Clean Architecture, Jetpack components) and integrate common services such as Firebase or in-app billing, that’s a plus. Please let me know: ...

I’m ready to turn my idea into a fully-functional Android application and need a developer who can guide the process from concept to Google Play release. At this stage I have the core concept and a handful of rough sketches; what I need now is help refining the user flow, designing an intuitive interface, building the backend logic, and packaging everything into a clean, well-tested APK. You’ll be working exclusively for the Android platform, so familiarity with current SDK versions, Kotlin or Java, Android Studio, and the play-store submission process is essential. If you can also advise on best-practice architecture (MVVM, Clean Architecture, Jetpack components) and integrate common services such as Firebase or in-app billing, that’s a plus. Please let me know: ...

I'm looking for a developer to create a GPS-based distance tracking system for Android. This system will be used to monitor the distance traveled by riders. Key Requirements: - Android compatibility - GPS-based tracking - Real-time updates - Route history Ideal Skills & Experience: - Proficiency in Android development - Experience with GPS integration - Knowledge of real-time data processing - Familiarity with database management for route history

I need a seasoned business analyst or technical writer to transform my high-level concept for an internal multi-division portal into a developer-ready package. The goal is to spell out, in plain detail, what must be built for employees, admins and any shared components so a product team can move straight into design and development without second-guessing requirements. What the work involves • Craft a concise project scope statement that sets clear objectives, boundaries and underlying assumptions. • Translate every business need into functional and non-functional requirements arranged by user type (employee, administrator and common). • Map complete, end-to-end workflows—onboarding, task routing, approval chains, reporting, and other key journeys—using ...

The current production build of my app is intermittently crashing, and I need a clean, targeted code update to eliminate these functionality-related bugs without introducing new issues. The crashes appear after recent OS updates and seem tied to memory handling inside two core screens; logs point to null pointer exceptions in the data-binding layer. You’ll receive: • Full Git repository access (Android, Kotlin + a small legacy Java module) • Current crash logs from Firebase Crashlytics and Logcat • A short video that reproduces the issue on two devices What I need from you: 1. Diagnose the root cause of the crashes. 2. Refactor or patch the affected classes so the app runs reliably across Android 8-14. 3. Commit code in a separate branch with clear co...