⭐ JOB AD: Full Stack Java Developer (Hybrid – NJ Office Required for Initial Paid Assessment) Location: Mountain Lakes, NJ (Initial in‑office assessment required) Type: Contract → Long‑Term / Hybrid Compensation: Competitive, based on experience and performance We are expanding our engineering team as we scale our Revenue Generation Engine (RGE) and Autonomous OS — advanced AI-driven systems powering multiple client platforms. We are seeking a Full Stack Java Developer who is comfortable working across modern backend and frontend stacks, and who can execute clean, efficient, and secure development workflows. This role begins with a paid, in‑office technical assessment at our private NJ development office. This is standard procedure due to the sensitive nature of our systems and the proprietary architecture we maintain. ⭐ What You’ll Do (Initial Assessment Project) The first assignment is a small, well‑defined technical task designed to evaluate your baseline competency with standard development tools and workflows: - Setting up and running a project locally - Working with GitHub repositories - Re-establishing deployment pipelines (e.g., Netlify or similar) - Ensuring clean builds and proper CI/CD functionality These are foundational skills expected of any experienced developer. Successful completion unlocks access to larger, ongoing AI and enterprise projects. ⭐ What We’re Looking For - Strong experience with Java, Spring Boot, REST APIs, Microservices - Solid understanding of React/Angular, modern front-end workflows - Comfort with GitHub, CI/CD, cloud deployments (Netlify, AWS, GCP, Azure) - Ability to work efficiently, follow structured processes, and deliver clean execution - Professionalism, reliability, and strong communication - Ability to work on-site for the initial assessment (required) - Availability for hybrid or remote work afterward (project-dependent) ⭐ Why Work With Us - We are scaling rapidly and onboarding multiple developers - You will work directly with our architecture and AI systems team - Opportunity to grow into long-term, high-impact roles - Exposure to cutting-edge AI automation and enterprise-level systems - Competitive compensation with performance-based advancement - A culture focused on speed, precision, and innovation ⭐ How to Apply Please send: - Your resume or LinkedIn profile - Your standard rate (hourly or fixed) - Your availability for the in‑office paid assessment in Mountain Lakes, NJ Office We are moving quickly and evaluating candidates on a rolling basis.

We are seeking an experienced .NET developer for a short-term, focused engagement to resolve a specific bug in a legacy medical application currently in production. This is a well-scoped project lasting approximately one to two weeks, ideal for someone who can quickly navigate older codebases and deliver a reliable fix without introducing regressions. The ideal candidate must have strong hands-on experience with .NET Framework 4.x, C#, and either WinForms or ASP.NET WebForms (depending on the application stack), along with proficiency in SQL Server for debugging stored procedures and queries. Familiarity with VB.NET is a plus, as the codebase may include mixed syntax. You will be responsible for reproducing the issue, identifying the root cause, implementing a clean and minimally invasive fix, and performing basic regression testing to ensure system stability. Given the critical nature of this application in a healthcare setting, attention to detail and documentation of changes for internal review and compliance traceability are essential. Prior experience with medical or healthcare IT systems is highly valued, as is any understanding of HIPAA, FDA software validation, or GxP requirements. We offer a fully remote, flexible engagement with quick onboarding, clear acceptance criteria, and access to the codebase, database schema, and test environment upon start. If you have successfully handled similar bug-fix or maintenance tasks on legacy systems, please reply with a brief summary of your relevant experience, availability, and hourly or project-based rate. Successful delivery may lead to additional follow-up work.

We are seeking an experienced developer proficient in FlutterFlow or Bubble to create a mobile app. The ideal candidate will have a strong understanding of no-code or low-code platforms and be able to deliver high-quality solutions efficiently. Responsibilities include designing, developing, and testing the app to ensure it meets our specifications. If you have a passion for innovative app development and a proven track record, we would love to hear from you.

We are a growing multi-specialty medical practice (Wellspire) with several clinics across the Greater Houston area (Humble, Humble NE, Atascocita, Kingwood, Cypress, and Memorial City). We recently implemented foundational SEO (focus keywords, meta descriptions, and page titles) from scratch, which successfully pushed several of our providers to page one of Google! Now, we are looking to take our SEO strategy to the next level. We want to transition from purely localized clinic pages to a comprehensive regional SEO structure. What We Need: We need an experienced Web Developer with a strong background in SEO and multi-location site architecture. Our goal is to build out a new hierarchical location structure for each of our medical specialties. For example, we want to create a main regional hub page targeting a broad keyword like "Houston Cardiology," which will then branch out into localized sub-pages for each clinic (e.g., "Humble Cardiology," "Kingwood Cardiology," etc.). Key Responsibilities: • Develop and implement a new, tiered page hierarchy (Main Regional Page ➔ Localized Sub-Pages) for multiple medical specialties. • Ensure the URL structure, internal linking, and site architecture follow SEO best practices for multi-location businesses. • Work off a provided structural outline/wireframe to build out these interconnected pages. • Ensure the new structure is fully responsive, fast-loading, and provides an excellent user experience. Requirements: • Proven web development experience (please specify which CMS platforms you are most proficient in, e.g., WordPress). • Strong understanding of technical and on-page SEO, specifically for local and regional search strategies. • Demonstrated past experience working with multi-location businesses and building out hub-and-spoke SEO structures. • Excellent communication skills and the ability to collaborate effectively. To Apply, Please Include: 1. Examples of similar multi-location or regional website structures you have built. 2. A brief explanation of how you approach setting up URL structures and internal linking for a parent/child location hierarchy. 3. Your estimated timeline to build out a template structure that we can replicate across our specialties.

Project Budget: $500 (Strictly Milestone-Based) CRITICAL REQUIREMENT BEFORE APPLYING: Payment for this project is strictly tied to real-world performance metrics. Milestone 1 requires a live stopwatch test on a mobile device showing sub-1-second cache loading on repeat lookups. If you do not have deep experience with high-speed local database architecture and caching models, do not apply. We measure deliverables with a stopwatch, not excuses. Project Overview & The Long-Term Vision: I am building Reseller Bro, a powerful mobile utility application designed for on-the-go resellers to instantly analyze product values, get a FLIP/SKIP verdict, and SAVE to a digital cart in seconds. This app is just the initial foundation—the engineer who successfully delivers this backend infrastructure will have the opportunity to partner with us long-term to build out our entire ecosystem, including advanced B2B inventory management tools and our wearable AR glasses workflow (Bro Lens). The front-end user interface and layout are already mostly complete. We are anchoring our backend data pipeline to a high-speed eBay API model that automatically calculates smart market estimates for other secondary platforms. We need an expert developer to clean up our database cache, implement a tier-condition formula, handle minor UI adjustments, and add high-energy audio/vibration triggers. The Core Tasks & Milestone Payment Structure: Milestone 1: Sub-1-Second Database Caching ($100 Escrow) The Issue: The previous build incorrectly forced live AI image recognition to run on every single scan, causing a 7–8 second delay even on repeat lookups. The Fix: You must implement a proper local database caching layer (e.g., SQLite). The first initial scan of an item can take up to 7 seconds to run the AI workflow and fetch the initial marketplace data. However, on any repeat scan, the app must skip the AI image recognition entirely, read a cached unique text identifier/key, and instantly pull the results from the internal database in under 1 second. Milestone 2: Data Engine & Percentage-Based Estimation Matrix ($200 Escrow) The Fix: Connect the backend cleanly with the official eBay Browse API using our developer keys. Target Marketplaces: The app displays valuation metrics for four core platforms: eBay, Depop, Grailed, and Poshmark. Condition Matrix & Platform Estimation Formula: Because eBay utilizes a wide variety of specific conditions across different categories, you will build an automated mapping and calculation formula. The app will pull raw condition data initially from the eBay API, group it cleanly into our 3-tier user system, and then use those baselines to instantly calculate the estimated market values for the other three platforms (Depop, Grailed, and Poshmark). New Tier: Dynamically maps all brand-new and pristine variations data directly, including: "New", "Excellent", "Excellent - Refurbished", "Open box", "New with box", "New with defects", and "New without box". Good Tier: Dynamically maps all standard pre-owned and quality-certified variations data directly, including: "Very Good", "Good", "Used", "Very Good - Refurbished", "Good - Refurbished", "Pre-Owned", and "Certified Pre-Owned". Poor Tier: Maps heavy-wear options directly, such as "For parts or not working" or "Fair". If a specific item category lacks a true "poor" marketplace data option, the engine must automatically fall back to calculate a custom percentage markdown (e.g., 40% less) relative to that item's "Good" tier baseline. The results from these three tiers will automatically calculate estimated market values for Depop, Grailed, and Poshmark using an internal background multiplier. If a user wants to check the exact live screen on those blocked platforms, tapping a platform tile will trigger a direct, one-tap deep link search into that specific app or web page. Smart Category Specifications (Vehicle & Electronics Handling): If the AI detects an image of a Vehicle (cars, trucks) or high-value Electronics, the app must dynamically generate a quick-spec form for the user to confirm/fill in (Vehicles: Make, Model, Year, Mileage; Electronics: Brand, Model, Capacity). This structured data must be fed directly into the pricing API for precise accuracy. Milestone 3: UI Redesigns, Audio/Haptics, Live Deployment & Final Handoff ($200 Escrow) UI Tweaks: Implement minor visual layout edits and updates to a few existing UI screens to align with this new calculation model. This includes ensuring tiles are accurately labeled as "Estimated Value," verifying the condition buttons display perfectly, adjusting the selling platform logos/designs, and making a few structural changes to the "Saved Items" page (I will go over the exact design changes with you directly). Haptics & Custom Audio Cues: Implement device vibration triggers (via Web Vibrations API) to pulse the device exactly when a verdict hits the screen. Integrate custom short audio sound bites that trigger instantly on the verdict display: a high-energy "YEAH!" (Lil Jon style) sound bite for a FLIP verdict, and a "HELL NO!" sound bite for a SKIP verdict. Live Deployment: Once the final features are fully approved, you will be responsible for successfully deploying the production build live onto our hosting account so the application is fully operational. Clean up the codebase and hand over the complete, finalized source repository. Requirements: Deep expertise in backend optimization, API data pipelines, and high-speed local database caching. Proficiency in mobile development frameworks, front-end audio integration, and Node.js. Strong communication skills. You will work with an existing repository and must provide clean, documented code. To Apply: Please reply explaining exactly how you will structure the local database cache so that a repeat scan completely bypasses the image-recognition API step to hit the sub-1-second mark. Copy and paste this right onto Upwork. It has every single feature, condition category, and protective barrier built in!

Notion-style CRM (table, board, calendar views) AI proposal builder (Claude API) Client portal with e-signature Commission tracking dashboard Stripe billing (already configured) CSV client import Atlas AI chat assistant Supplier management Trip marketplace Row-level data privacy (each user sees only their own data

We are seeking a skilled freelancer to monitor, correct, and revise our existing WordPress plugins and scripts. The ideal candidate will have experience in WordPress and related technologies, ensuring that our plugins and scripts are optimized and functioning smoothly. This role requires attention to detail and the ability to identify and fix issues efficiently.

Principal Full-Stack Engineer (React Native • Node.js • AWS • AI Infrastructure) Mission Own the entire engineering stack and take FitCheck from its current state to a stable, production-ready application. You will architect, build, integrate, deploy, and lead all technical execution across mobile, backend, infrastructure, and AI services. Required Skills * React Native (Expo) * TypeScript * Node.js (NestJS) * PostgreSQL / Aurora * Kafka * Redis * REST APIs * WebSockets * AWS * EKS * ECS * EC2 * S3 * CloudFront * IAM * CloudWatch * Kubernetes * Docker * GitHub Actions CI/CD * Cloudflare * Firebase * GPU deployment on AWS * PyTorch model deployment * AI inference APIs * Authentication * Performance optimization * Security * Monitoring * Production deployments Responsibilities * Own the entire codebase. * Lead architecture decisions. * Build frontend and backend features. * Design and implement APIs. * Deploy and maintain AWS infrastructure. * Build and maintain CI/CD pipelines. * Deploy and manage GPU inference servers. * Optimize performance and scalability. * Review all code. * Fix production issues. * Ship new releases. * Coordinate any additional contractors if needed. * Take full ownership of technical delivery. Requirements * 10+ years software engineering. * Led production applications from development through launch. * Expert in React Native and Node.js. * Expert in AWS. * Experience deploying AI workloads on GPUs. * Experience scaling applications to hundreds of thousands of users. * Strong architectural and DevOps experience. * Excellent communication and ownership. Success Criteria Within the first 90 days: * Complete integration of frontend and backend. * Production-ready CI/CD. * Stable AWS infrastructure. * Reliable AI inference pipeline. * End-to-end testing. * Production deployment. * Documentation. * Clear engineering roadmap.

We are expanding our company and seeking a skilled web developer to join our team. The ideal candidate will have experience in web development, HTML5, and JavaScript. This is a long-term, part-time engagement with a focus on building and maintaining our web presence. If you are passionate about web development and eager to contribute to a growing company, we would love to hear from you.

I taught myself how to build a Shopify site for my rental business, but I'm running into some errors and I cant seem to get the code to work. I'd also like to add some custom features to enhance user experience. I need a freelancer with experience in Shopify and web development to help resolve these issues and implement new features.