Are you a backend engineer who enjoys debugging, improving existing systems, and completing real product features in a fast-moving startup environment? We are building a platform for the foodservice industry focused on bid management, rebates, contracts, invoices, and document automation. We are looking for a backend developer to help us fix, complete, and stabilize several important modules in our application. This will begin as a paid trial project. If the work is completed successfully, there is an opportunity for ongoing development work as we continue to grow. Main Tasks We currently have several backend modules already built, but they are incomplete, buggy, or not working as expected. Your main responsibility will be to review the existing code, identify issues, fix bugs, complete missing functionality, and make sure the modules work properly from end to end. 1. Invoice Management Module We currently have an invoice module, but it is not working as expected and has multiple bugs. This module also connects with Stripe, so we need someone who can troubleshoot and complete the Stripe-related backend workflows. Responsibilities may include: Debugging the existing invoice management module Fixing invoice creation, updating, viewing, and status logic Reviewing and fixing Stripe integration issues Ensuring invoice/payment data is handled correctly Improving API reliability, validation, and error handling Testing the full invoice workflow from admin and user perspectives 2. Contracts Module We currently have a contracts module, but it is not fully functional. At the moment, admins are not able to properly create contracts, and users are not able to view or sign open contracts. This module uses DocuSign, so experience with DocuSign or similar e-signature integrations is strongly preferred. Responsibilities may include: Debugging the existing contracts module Fixing admin contract creation workflows Fixing user contract viewing and signing workflows Reviewing and fixing DocuSign integration issues Ensuring contract statuses update correctly Handling permissions and access control for admins and users Testing the complete contract lifecycle from creation to signature 3. Document Classifier Module We have a document classifier module that works in some cases, but it fails when multiple files are loaded through S3 and has additional bugs. We need help stabilizing the file processing and information extraction workflow. Responsibilities may include: Debugging the existing document classifier module Fixing issues with multiple file uploads through S3 Improving information extraction reliability Handling batch file processing correctly Fixing bugs related to file parsing, storage, and classification Improving error handling and logging for failed document processing Testing single-file and multi-file workflows What You’ll Do You will be working primarily on backend development and debugging for an existing application. This is not just new feature development — we need someone comfortable jumping into existing code, understanding how the system works, finding bugs, and completing unfinished backend workflows. Your work may include: Reviewing and debugging existing Nest.js/TypeScript backend code Building and fixing RESTful API endpoints Working with Stripe, DocuSign, S3, and document-processing workflows Improving validation, permissions, error handling, and logging Testing APIs using Postman or similar tools Coordinating with frontend developers to ensure features work end to end Creating or updating backend/API documentation as needed Using Git and our CI/CD workflow for deployment Tech Stack Our current backend stack includes: Nest.js TypeScript REST APIs Stripe integration DocuSign integration S3 file storage Document classification / extraction workflows CI/CD pipelines Postman or similar API testing tools Slack and ClickUp for communication and task tracking Skills We’re Looking For The ideal candidate should have: Strong experience with Nest.js and TypeScript Experience debugging and completing existing backend modules Strong understanding of RESTful API design Experience with third-party API integrations Experience with Stripe is strongly preferred Experience with DocuSign is strongly preferred Experience with S3 or cloud file storage is preferred Ability to troubleshoot complex backend bugs Strong API testing skills using Postman or similar tools Good understanding of authentication, authorization, and permissions Ability to write clean, maintainable code Clear communication and reliable follow-through Comfort working in an agile startup environment Compensation and Trial Period This role will start with a paid trial sprint. Compensation is $100 per completed 2-week sprint, paid after successful completion, testing, and verification of the assigned sprint work. We understand this is modest starting compensation, but we are looking for someone who wants to grow with the company. If the initial work is completed successfully, we would like to continue working together on additional backend features, improvements, and platform modules. There may also be an opportunity for full time employment consideration after a successful trial period, based on performance, reliability, and long-term fit. Why Join Us? Meaningful Product Work Your work will directly improve core parts of our platform, including invoices, contracts, payments, and document automation. Startup Growth Opportunity We are an early-stage company building in the foodservice bid and rebate space. The right person can grow with us as the platform expands. Real Ownership You will not just be assigned small isolated tasks. You will help complete important backend modules that are central to the product. Flexible Collaboration We use Slack and ClickUp to manage tasks and communication. Standups may be scheduled as needed, and we work in an agile sprint-based structure. How to Apply Please apply with: A brief summary of your backend experience Your experience with Nest.js and TypeScript Any experience with Stripe, DocuSign, S3, or document processing Examples of backend modules or integrations you have built or fixed Your availability for a 2-week sprint Confirmation that you are comfortable working on a paid trial sprint with the possibility of ongoing work We are looking for someone who can start by helping us fix and complete the invoice, contracts, and document classifier modules. If the work goes well, we would like to hire you for additional backend development work as we continue building the platform.

I need a Discord bot built that posts positive expected value (+EV) sports betting picks to a channel, plus esports match schedules/scores. I have the full technical spec already written — APIs picked, EV formula defined, architecture outlined. This is integration work, not research. What's provided: Working API keys for The Odds API (sports odds) and PandaScore (esports stats) — I'll provide on hire Complete EV calculation formula (Python, ready to use) Full architecture spec (polling schedule, caching approach, bookmaker lists) Core deliverables (must-have, fixed price): Discord bot that connects to my server Scheduled polling (1-2x daily, not live) of The Odds API for sports moneylines + player props EV calculation comparing soft-book odds (DraftKings/FanDuel/Caesars) against Pinnacle as the sharp reference Caching layer (database) so the bot never calls the API live per Discord command Bot posts flagged +EV picks to a designated channel, above a configurable EV threshold PandaScore integration for esports match schedules/results posted to a separate channel Basic error handling with retry/backoff (no runaway API costs) Documentation: how to run it, how to add new sports/leagues, how to change the EV threshold Stretch goal (only if time allows within budget — not required): OddsPapi integration for esports moneyline EV detection (this API is unverified/free-tier, so treat as experimental) Tech preferences: Python or Node.js, whichever you're stronger in. Open to your hosting recommendation (needs to run 24/7 cheaply). Budget & Payment Structure: $500 fixed price, split into milestones Milestone 1 ($150) — Foundation: Discord bot connects to server, The Odds API integration pulling live sports odds data, caching layer working. Paid on demo of working data pull + bot online in server. Milestone 2 ($200) — Core Logic: EV calculation implemented and verified accurate against manual spot-checks, picks posting to Discord channel automatically on schedule. Paid on demo of at least 3 correctly-calculated +EV picks posted live. Milestone 3 ($150) — Esports + Polish: PandaScore esports schedule/results integration, error handling/retry logic, documentation delivered. Paid on final delivery + handoff call. To apply: Tell me your estimated hours for each milestone, and confirm you've worked with Discord bots + REST API integrations before.

Title: Fractional Backend Engineer Needed to Own 3rd-Party API Integrations Overview We’re looking for a strong fractional engineer to help own and scale our API integrations with third-party platforms. This role is ideal for a backend-leaning engineer who is comfortable working independently, reading API documentation, designing durable integration patterns, and moving quickly from requirements to production-ready implementation. The workflow will be dependent on new customer onboarding, and is unlikely to be consistent however opportunity is long-term. You’ll be responsible for helping us connect our product to external platforms, manage authentication flows, handle data ingestion and synchronization, and ensure integrations are reliable, well-documented, and maintainable. What You’ll Do Own API integrations with third-party platforms from discovery through implementation Review external API documentation and recommend the best integration approach Build, test, and maintain backend services that connect to external systems Implement authentication flows, including OAuth, API keys, webhooks, and token refresh logic Design data mapping, ingestion, sync, and error-handling workflows Build reliable retry, logging, and monitoring patterns for integrations Debug API issues, edge cases, rate limits, and data inconsistencies Document integration architecture, assumptions, setup steps, and known limitations Work directly with the founder/product lead to prioritize integrations and tradeoffs Ideal Background Strong backend engineering experience Experience building and maintaining third-party API integrations Comfortable working with REST APIs, webhooks, OAuth, JSON, rate limits, and async jobs Experience with Node.js, TypeScript, Python, or similar backend stacks Familiarity with cloud infrastructure and modern backend architecture Ability to work independently and communicate clearly Strong attention to detail, especially around data accuracy and reliability Startup experience preferred Nice to Have Experience integrating with sports, ticketing, calendar, CRM, marketing, media, or commerce platforms Experience with calendar APIs, event data, or scheduling systems Experience with AI-assisted development workflows Experience setting up monitoring, logging, and integration health dashboards Engagement Structure This is a fractional role, likely starting at 10–20 hours per week, with the opportunity for ongoing work if the fit is strong. We’re looking for someone who can own outcomes, not just complete assigned tickets. To Apply Please include: A brief summary of your backend/API integration experience Examples of third-party APIs you’ve integrated with Your preferred backend stack Your availability and hourly rate A short explanation of how you approach debugging unreliable or poorly documented APIs We’re especially interested in engineers who can move fast while still building clean, reliable systems.

Full-Stack Developer Needed to Build Production-Ready Budget-Focused Meal Planning Web Application Project Overview I am building a consumer web application focused on helping users create affordable meal plans and shopping lists while staying within a grocery budget. The project has progressed beyond the concept stage and currently includes: * Validated prototype * Product requirements documentation * GitHub repository * Supabase environment * Frontend application foundation I am seeking an experienced full-stack developer to help transform the existing foundation into a production-ready MVP. This is a contract opportunity with potential for future work following a successful launch. Scope of Work The selected developer will help: * Review and improve the existing codebase * Implement production-ready frontend and backend functionality * Design and optimize database relationships * Build user authentication and account management * Implement core application workflows * Prepare the application for deployment * Create maintainable technical documentation Technology Stack Current environment includes: * React-based frontend * Supabase * PostgreSQL * GitHub * Modern web application architecture Developers may recommend improvements if justified. Required Experience Required: * Full-stack web application development * React * JavaScript / TypeScript * Node.js * PostgreSQL * REST API integration * GitHub workflow experience Preferred: * Supabase experience * AI-powered application experience * Startup MVP experience * Experience improving existing applications Deliverables * Production-ready MVP * Clean and maintainable code * User authentication * Core application functionality * Deployment support * Technical documentation Timeline Target MVP completion: 6–10 weeks NDA & Ownership A standard NDA and work-for-hire agreement will be required prior to sharing detailed specifications and prior to project start. All work product, code, documentation, and intellectual property created as part of this engagement will be owned by the client. Budget & Proposal Requirements As an early-stage startup founder, I am operating with a limited development budget and am looking for the most cost-effective path to launch. When submitting a proposal, please include: 1. Estimated total project cost 2. Estimated timeline 3. Recommended development approach 4. Opportunities to reduce development cost while maintaining quality 5. Which items you would prioritize for Version 1 6. Which items you would recommend postponing until a later release Please provide specific recommendations rather than generic proposals. To Apply Please include: 1. Links to relevant projects 2. Experience with React and Supabase 3. Experience building consumer-facing web applications 4. Experience productionizing prototypes or existing applications 5. Your answer to the following question: "If this were your own startup and your own money, how would you build the MVP as cost-effectively as possible?" Please begin your proposal with the word "StretchBites" so I know you have read the entire posting.

Founding Product Engineer Scottsdale, AZ (In Person Preferred) | Full-Time | $10,000/month Help Build the Future of Real Estate Real estate is one of the largest industries in the world, yet most brokerages still rely on disconnected software, spreadsheets, manual processes, and inconsistent coaching to develop their agents. We're changing that. PCx is building the operating system for real estate organizations: a single platform that brings together onboarding, training, coaching, performance management, business planning, accountability, AI, and leadership into one modern experience. Our mission is simple: Help brokerages develop better agents, faster, at scale. We've already invested heavily into building the platform and have an experienced overseas development team. We're now looking for a Founding Product Engineer to become our technical leader in Arizona, someone who can own the product, move quickly, make smart technical decisions, and help build a world-class software company. This isn't a corporate engineering job. This is an opportunity to help build something meaningful from the ground up. About the Role You'll work directly with the founder to translate product vision into exceptional software. You'll be expected to think like both an engineer and a product leader, understanding the business, improving the product, writing production code, reviewing architecture, and helping lead development across our engineering team. We're looking for someone who enjoys solving hard problems, moving fast, and taking ownership. Responsibilities * Lead development of our SaaS platform alongside an existing engineering team * Write high-quality production code across the full stack * Design scalable architecture and technical solutions * Review code and maintain engineering standards * Translate product ideas into technical implementation plans * Collaborate directly with the founder on product strategy and roadmap * Improve user experience through thoughtful product decisions * Build and integrate AI-powered features using modern LLM technologies * Help hire, mentor, and grow the engineering team over time * Continuously improve platform performance, scalability, and reliability Ideal Experience * Strong experience building modern SaaS applications * Expert with React, TypeScript, Node.js, and PostgreSQL * Experience designing scalable software architecture * Experience working with cloud infrastructure (AWS preferred) * Familiarity with AI technologies, OpenAI APIs, and LLM-powered applications * Startup experience or a desire to build in a fast-moving environment * Strong communication skills with the ability to explain technical decisions clearly * Willing to work from or relocate to Scottsdale, Arizona What Success Looks Like Within your first year, you'll become the technical leader behind a platform with the potential to transform how thousands of real estate professionals learn, grow, and build their businesses. As the company grows, this role's salary will grow proportionally, and quickly. If you're looking to move fast and make a meaningful change in both the real estate industry, and eventually other sales industries, lets talk.

Next.js + Supabase Developer to Take SaaS App to Launch (Stripe Connect Required) I’m a solo founder finishing a club management SaaS (Next.js 16 App Router, TypeScript, Supabase, Stripe Connect, Vercel). The app is ~90% built and in pre-launch. I need someone to help close out the last features and bugs and get it shipped. You must have real, demonstrable experience with: - Next.js App Router — Server Components, Server Actions, the v15/16 model (not just client-side React) - Supabase — Postgres, RLS, migrations, auth - Stripe Connect — connected accounts, webhooks, idempotency (basic Stripe Checkout is not enough) Bonus if you have had an app you personally got accepted into the App Store, including how you handled payments. This is not part of this project but would be a phase 2.

Project Overview: I am building Reseller Bro, a mobile utility application designed for on-the-go users to analyze product images and instantly retrieve live, accurate marketplace valuation metrics. The front-end user interface and layout are largely complete. The application uses an AI workflow for visual recognition and keyword generation, but the backend data retrieval and sync pipeline needs optimization for speed and absolute accuracy. I am looking for a highly skilled backend developer to conduct a code audit, repair a broken data aggregation pipeline, and optimize our database caching architecture. The Core Tasks: Database Cache Failure: The app currently fails to properly save or recall data on repeat queries. We need a high-speed caching layer so that if an item has already been searched once, the second lookup pulls from the internal database instantly (under 1 second). Data Sync & Engine Accuracy: The live data gathering process is currently unstable and occasionally returns empty results even for common consumer items with deep market history. Once the AI identifies the item keywords, the data pipeline must reliably sync and aggregate live pricing data from major public e-commerce and secondary marketplaces. Data Array / Tier Mapping Mix-up: The app currently handles item condition mapping poorly, sometimes displaying irrational pricing tiers (e.g., valuing low-tier condition higher than top-tier condition). We need a clean pre-fetch matrix that normalizes marketplace conditions into three clean categories on the first search and automatically filters out pricing anomalies or extreme statistical outliers. Required Technical Skills: Strong backend development experience using Node.js or Python. Advanced expertise in data extraction, handling complex HTML/JSON payloads, managing dynamic connection protocols, and optimizing marketplace data synchronization. Deep experience with database optimization and high-speed caching layers (such as PostgreSQL, Redis, or similar). Ability to step into an existing codebase, audit backend logic, and refactor code without disrupting the current frontend UI layout. 💰 Budget & Performance-Based Milestones ($700 Total) This contract is fixed-price and strictly milestone-driven based on functional performance metrics. No milestones will be released without successful live-testing verification. Milestone 1 ($150) - Code Review & Cache Repair: Audit the inherited repository. Fix the database caching system so that previously queried items bypass the live search entirely and load data instantly (under 1 second). Milestone 2 ($250) - Data Pipeline Optimization & Matrix Mapping: Fix the live data aggregation process to consistently pull reliable pricing from target market channels using the AI-generated keywords. Implement data-cleaning and normalization rules to ensure price tiers always reflect a logical tier structure while removing extreme outliers. Milestone 3 ($300) - Final Integration & Testing: Fully connect the optimized database cache, clean data sorting logic, and application backend into a finalized, stable build ready for deployment testing. To Apply: Please respond with your relevant experience in optimizing high-speed database caches and managing high-volume marketplace data aggregation. Please briefly explain your typical approach to ensuring stable, reliable data connections with public e-commerce platforms. Full project source files and existing code repositories will be shared with top candidates during the interview phase.

I’m building Elevyn, a platform designed to help people better understand themselves through connected data, intentional reflection, and AI-generated insights. This is not a social media platform. This is not a productivity app. This is not just another trading journal. Elevyn is an operating system for self-mastery, with trading serving as the first environment where personal growth becomes measurable. Most apps collect data. Elevyn is designed to observe. The goal is to connect information across different areas of a person’s life and uncover meaningful patterns that help them improve their decision-making, habits, discipline, and overall performance. The Vision Users will log information such as: • Sleep • Mood • Daily reflections • Workouts • Morning routines • Trading activity • Goals • Habits • Personal notes Instead of simply displaying this data, Elevyn will analyze relationships between it and surface meaningful insights. Examples include: • “You slept less than 5 hours before 7 of your last 10 losing trades.” • “Your win rate increases after completing your morning routine.” • “You tend to become more impulsive after multiple winning days.” • “Your consistency improves when workouts and journaling happen on the same day.” The long-term vision is an intelligent system that continuously helps users become more self-aware. Current Stage I already have: • Brand identity • Vision and philosophy • User flows • Interactive prototype • Core feature planning • Long-term roadmap I’m now looking for a developer or small team (2-3 people) to build the first production version. What I’m Looking For I’m looking for someone who can think beyond simply building screens. I want someone who can: • Build scalable architecture • Recommend the best technologies • Think through user experience • Ask thoughtful questions • Help solve technical challenges • Build for future AI integrations • Create clean, maintainable code Experience with AI, analytics, mobile applications, and scalable backend systems is a significant advantage. Technology (Open to Recommendations) I’m open to your recommendations, but I’m considering: • Flutter or React Native • Node.js or Python backend • PostgreSQL • Firebase/Supabase • AWS • AI integrations (OpenAI or similar) • Secure authentication and cloud infrastructure Long-Term Vision Trading is only the beginning. The underlying engine should eventually support entrepreneurs, athletes, creators, students, and anyone pursuing mastery in a specific area of life. The core idea remains the same: Help people understand themselves by connecting patterns across their behaviors, decisions, and outcomes. Who I’m Looking For I’m looking for someone who believes in building meaningful products—not just completing tasks. If you’re excited about creating a platform that combines psychology, data, AI, and personal development into something people genuinely use to improve their lives, I’d love to hear from you. Please include examples of similar work, your recommended tech stack, and how you would approach building a scalable MVP that can grow over time.

I have a functional React application built with Vite and Tailwind CSS. The core logic, component structure (App.jsx), and UI assets are complete and working as intended. However, I am encountering build/deployment errors on Netlify, likely due to a cluttered package.json and configuration inconsistencies developed during iteration. This is a quick job but ultimately need help getting it across the finish line (ideally today). The Goal: I am looking for an experienced React developer to perform a "clean room" migration. Instead of debugging the current build environment, I need you to: 1. Initialize a fresh, standard Vite + React project. 2. Migrate my existing App.jsx logic and all static image assets into this new, clean repository. 3. Ensure the project builds successfully and deploys cleanly to Netlify.

🚀 Freelance Full Stack Developer Wanted for A Mobile APP MVP  We’re looking for a medical app developer to develop a mobile app MVP. We're looking for a skilled Full Stack Developer to bring our product vision to life. This is a freelance opportunity, perfect for someone who knows how to deliver an MVP that’s functional and launch ready.   Must be US based.  🗓️ Target MVP Launch:  ---🔧 What You’ll Do: · Design and develop the front-end (mobile-first) and back-end of our MVP from scratch.  · Collaborate closely with the founders to translate product ideas into functional features.  · Build a clean, responsive, and user-friendly mobile UI.  · Set up secure user authentication, data storage, and scalable APIs.  · Deploy and maintain the MVP in a cloud environment.  --- 🛠️ Tech Stack We’re Looking For: We're flexible — but preference will be given to developers experienced with: · Frontend: React Native or Flutter  · Backend: Node.js, Express (or Python/Django if that's your strength)  · Database: Firebase, PostgreSQL, or MongoDB  · Cloud: Firebase, AWS, or other serverless platforms  · Platform(s): iOS, Android, both, (including web + mobile a plus) · Key Features: user registration, data capture (including pictures), analytics dashboard, HIPAA compliance, push notifications).  · Health/Security/Regulation: we need developers experienced with health-app regulations (HIPAA, GDPR, etc.), data security and privacy.  · Deliverables & Timeline: Will provide milestones.  · Team vs Individual: Single freelance developer or a small team preferably (designer + backend + mobile).  · Experience / Portfolio Requirements: Please provide examples of prior health apps or mobile apps you’ve built.  · Communication & Location: Time Zone is ET. • The signing of the organization NDA is REQUIRED before any discussion or engagement.