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  • Hourly: $45.00 - $85.00
  • Intermediate
  • Est. time: More than 6 months, 30+ hrs/week

We’re seeking a Full Stack Engineer (mid- to senior-level) with strong expertise in Node, React, and TypeScript to design, build, and maintain the APIs, workflows, and interfaces that power the Probada platform. This is a hands-on, end-to-end role that blends backend logic, data-driven workflows, and modern, component-based frontend development. You’ll work directly with our Lead Developer and CEO to ship features that have immediate, meaningful impact in classrooms and communities. Key Responsibilities Design, implement, and maintain backend APIs and workflows using Node and TypeScript Build responsive, maintainable user interfaces in React following component-driven best practices Integrate frontend and backend components into cohesive, scalable systems Collaborate closely with designers, product managers, and engineers to deliver high-quality features Optimize platform performance, reliability, and maintainability Participate in code reviews, testing, and CI/CD processes Requirements 3+ years of professional full-stack development experience Strong proficiency in Node, React, and TypeScript Solid understanding of component-driven architecture and modular design Familiarity with Git workflows, Agile development, and CI/CD pipelines Excellent problem-solving, debugging, and communication skills Additional Preferences Experience with MongoDB, Parse Server, GraphQL, Docker, Jest, Material UI, IntelliJ IDEA, or Jira Interest or experience in edtech, workforce development, or scalable SaaS platforms

  • Fixed price
  • Expert
  • Est. budget: $10,000.00

We are a fast-growing telecom / AI-First CPaaS serving sms and voice API's. We are building the first AI-first communications platform (SMS, Voice, RCS, AI agents) designed for speed, simplicity, and real-world business outcomes. We are not looking for a “task completer.” We are looking for a true senior engineer who: thinks in systems moves fast makes decisions independently writes clean, scalable code uses AI tools (Claude, etc.) as a force multiplier ⚠️ Read This First *DO NOT APPLY IF YOU ARE PRETENDING TO BE IN A DIFFERENT COUNTRY. PROOF OF RESIDENCY IS REQUIRED. Most applicants will not be a fit. If you need: detailed tickets hand-holding constant direction This is NOT the role for you. If you are the type of engineer who: sees a problem and solves it end-to-end improves architecture without being asked ships quickly without sacrificing quality You will thrive here. What You’ll Do Build and ship full-stack features across our platform (messaging, voice, AI workflows) Make architectural decisions (not just implement) Improve system performance, reliability, and scalability Work directly with founders (no PM layers) Move from idea → production very quickly What We Expect (Non-Negotiable) 5+ years real full-stack experience (not just titles) Strong backend experience (Node.js / APIs / infra) Strong frontend experience (React or similar) Experience building production systems at scale Ability to work autonomously with minimal direction High ownership mentality Bonus (but highly valuable) Experience with telecom / CPaaS / messaging Experience with AI integrations (LLMs, agents, workflows) Experience optimizing performance at scale Startup experience (especially early-stage or fast growth) How We Work Small, high-output team Very fast iteration cycles No unnecessary meetings High trust, high expectations We use AI tools heavily (Claude, etc.) — you should too What We Care About Most Not your resume. We care about: How you think How you build How fast you execute The quality of your code To Apply Please include: Links to projects you’ve built (real production work) A short explanation of: a system you designed end-to-end a difficult technical decision you made independently Your GitHub Optional (but strong signal): Share how you use AI (Claude, etc.) in your workflow Compensation Competitive (based on experience) Long-term opportunity with a fast-growing, profitable company If you are truly senior, this will feel obvious. If not, this role will be very uncomfortable. **THIS IS A FT, HOURLY ROLE. PROVIDE YOUR REQUESTED HOURLY RATE IN PROPOSAL**

  • Hourly: $30.00 - $50.00
  • Intermediate
  • Est. time: 1 to 3 months, Less than 30 hrs/week

Need one developer to build the first release of a site where people search events, pick tickets on a seat map, pay by card, and receive order confirmation. A small admin area is needed to update homepage content, categories, and basic site options. MVP includes - Event listing with search and filters - Event pages and ticket / seat selection - Cart and checkout with a payment provider - User sign-in and simple account flow - Connection to an external ticket supplier API (we provide access and documentation) - Basic back office for content and settings Stack React/Next, TypeScript, Tailwind. Node API. Auth/database. Card payments. Third-party inventory and seat-map tools. Apply with - One similar project (payments + external API) - Your rate and weekly availability - Realistic timeline for the MVP

  • Hourly: $60.00 - $75.00
  • Expert
  • Est. time: 1 to 3 months, Less than 30 hrs/week

Job Description Summary We're looking for a senior full stack JavaScript / TypeScript engineer to join an active client engagement immediately. The work centers on taking a Chrome Extension from MVP to production, alongside a companion SaaS application used by the team managing the extension. General information This engagement is part of a larger product build for one of our clients. An MVP of the Chrome Extension has already been developed, and the focus now shifts to building, hardening, scaling, and shipping a production-ready release. The SaaS application serves the internal team that manages and operates the extension, and will be built in parallel. You'll be joining an existing engineering team with a project manager already in place. The role requires someone who can orient quickly in an active codebase, collaborate closely with teammates, and interface with project stakeholders when needed. Work is coordinated through Jira, and the team communicates via Slack and Zoom. You'll be onboarded with a Microsoft account that provides SSO access to the tools and systems you need from day one. Development work is performed by connecting to a secure dev workspace directly from your local IDE. Tasks and Deliverables - Take the Chrome Extension from MVP to a stable, production-ready release. - Contribute to the development of a companion SaaS application for the client's internal team. - Integrate into the existing engineering team and align with the project manager on priorities and delivery. - Engage with project stakeholders directly as needed throughout the engagement. - Maintain code quality, documentation, and engineering standards appropriate for a production product. Required experience - Senior-level full stack JavaScript and TypeScript experience. - Demonstrated experience building and shipping Chrome Extensions. - Strong front-end engineering skills, including a modern framework such as React. - Solid back-end experience with Node.js and REST API development. - Proven ability to onboard into an existing codebase and contribute without a long ramp-up period. - Experience working within a structured engagement — alongside a PM, an existing team, and external stakeholders. - Familiarity with Jira for task tracking and project coordination. - Excellent English communication skills; US-based or US timezone required. - Availability during standard US business hours, Monday through Friday. Nice to have: - Experience with SaaS architecture, including multi-tenant application patterns. - Familiarity with Chrome Extension APIs including content scripts, background service workers, and the Chrome storage API. - Background working in agency or client-services environments. Engagement highlights - Step into an active, well-scoped project with established project management and a clear path to production. - Work across two connected workstreams — a Chrome Extension and a SaaS platform — with room to take meaningful ownership. - Join an engaged team with strong client-side collaboration and defined stakeholder involvement. Additional information All candidates selected for engagement are subject to a standard background check prior to onboarding.

  • Hourly
  • Intermediate
  • Est. time: 3 to 6 months, 30+ hrs/week

We are building a next-generation workflow automation platform that combines deterministic business rules, artificial intelligence, document intelligence, and human review workflows into a single operating system. This is not a traditional CRM project. Our vision is to develop a doctrine-driven platform where business rules serve as the system authority, AI serves as an analytical and drafting layer, and human reviewers serve as the final compliance checkpoint. We are seeking an experienced engineer or engineering partner who can help architect and build the platform from the ground up. Project Objectives The platform will: • Ingest and analyze large volumes of structured and unstructured documents • Extract data from reports, PDFs, and supporting documentation • Apply rule-based workflow logic • Generate AI-assisted recommendations and draft outputs • Maintain complete audit trails and workflow transparency • Route work through human review checkpoints • Support future deployment of local AI infrastructure for privacy and performance Core Architecture The system will be built around four primary layers: 1. Rules Engine * Deterministic business logic * Workflow orchestration * State management * Trigger and escalation logic * Audit tracking 2. AI Layer * Document analysis * Classification * Pattern detection * Summarization * Draft generation * Structured outputs 3. Local Processing Layer * OCR * Document parsing * Data extraction * Vector search * Local inference capabilities * Privacy-first processing 4. Human Review Layer * Quality assurance * Workflow approvals * Compliance review * Exception handling Initial Development Priorities Phase 1 • User authentication • Client record management • Document upload system • OCR and document extraction • Workflow engine • Rule-based status management • Review dashboard Phase 2 • AI-powered document analysis • Automated classification • Recommendation engine • Draft generation workflows • Response parsing Phase 3 • Local AI infrastructure • Vector database integration • Knowledge retrieval system • Multi-agent workflow orchestration • Advanced automation Desired Technical Experience Required • React / Next.jsNode.js, Python, or similar backend framework • PostgreSQL or equivalent relational database • REST APIs • Cloud infrastructure (AWS, Azure, or GCP) • Workflow automation systems • Document processing pipelines Preferred • OpenAI APIs • Anthropic APIs • Retrieval-Augmented Generation (RAG) • LangGraph, LangChain, or similar frameworks • Vector databases • OCR technologies • AI agent architectures • NVIDIA AI ecosystem • Local model deployment What We Are Looking For We are not looking for someone who simply builds forms and dashboards. We are looking for a builder who understands how to combine: • Rules engines • Artificial intelligence • Workflow automation • Human review systems • Scalable software architecture The ideal candidate enjoys solving complex business process problems and translating expert decision-making into software systems. Engagement Structure Open to: • Fractional CTO • Lead Architect • Senior Full-Stack Engineer • AI Systems Engineer • Development Agency • Long-term strategic technology partner To Apply Please provide: • Relevant project examples • Experience building workflow automation platforms • Experience with AI-powered applications • Technology stack recommendations • Estimated availability • Preferred engagement structure

  • Fixed price
  • Intermediate
  • Est. budget: $3,000.00

🚀 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.

  • Fixed price
  • Expert
  • Est. budget: $10,000.00

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.

  • Hourly: $30.00 - $50.00
  • Intermediate
  • Est. time: 1 to 3 months, Less than 30 hrs/week

Job Description: We are looking for a skilled, "under-the-hood" Full-Stack Developer to help build out Lafayette Academy’s online portal. We have clear visual layouts, a working offline prototype, and a live front-end dashboard currently hosted on Vercel. We use AI heavily in our workflow for strategy, logic, and rapid drafting. However, we do not want an AI-only prompt engineer. We need a traditional, foundational developer who understands actual code architecture, databases, and deployment systems. If the AI generates a buggy script, you must have the depth of knowledge to debug it manually and make it work. What You Will Do: Take existing static mockups (HTML/CSS/Next.js components) and integrate them into our live Vercel environment, OR help create new mockups if the ones we have need to be upgraded. Connect user interfaces to a secure database (like Supabase or Firebase) to handle real-time student data. Help bridge our frontend to API endpoints (like OpenAI) to power our live "Personalization Cues" for instructors. Troubleshoot, debug, and optimize existing code when automated tools hit a wall. Our Tech Stack Focus: React / Next.js Vercel Hosting Tailwind CSS Database integration (SQL/Supabase/Firebase) To Apply: Please start your proposal with the words "Under the Hood." This proves you read the description. Tell us briefly about a time you had to manually fix a complex database or code glitch that automated tools couldn't solve.

  • Hourly
  • Expert
  • Est. time: 1 to 3 months, Less than 30 hrs/week

Project Overview I have a fully functional React prototype of a proprietary web-based business tool. The prototype has been built, tested, and validated. I need a skilled developer to build the production-ready hosted version. This is a precise execution job. A detailed Developer Brief (provided after NDA) specifies every feature, field, validation rule, output format, and architectural requirement. Your job is to build exactly what is described. The Job The prototype UI is built and working. The primary work is: 1. Replacing local/browser storage with a proper cloud database 2. Building the API layer connecting the UI to the database 3. Implementing the data model, cascade logic, and validation server-side 4. Deploying to a hosted environment at my domain 5. Importing default data at launch 6. Transferring all source code and IP to me This is not a design job. The UI exists. This is a data layer and infrastructure build. Technical Requirements Frontend: React (existing prototype is React/JSX) Backend: REST API or GraphQL connecting to a cloud database Database: Cloud-hosted, persistent (Supabase preferred; alternatives considered) Hosting: Vercel or equivalent (fully documented and transferable to client) Responsive: Desktop and mobile Non-Negotiables No AI features of any kind No third-party analytics, tracking, or data collection No unapproved external dependencies Daily commits to a private GitHub/GitLab repository I own and control — from day one Fixed-price, milestone-driven contract — no hourly billing NDA required before receiving the Developer Brief or prototype IP Assignment Agreement required before work begins All work product belongs to me from the moment it is created What I’m Looking For Strong React experience Solid Supabase or equivalent backend experience Someone who reads specs carefully and builds what is written Clear communicator who flags questions early US-based preferred, but open to others with strong English and relevant experience Proposal Requirements Please submit your proposal with: Your relevant experience (React, Supabase or similar, web app builds) Examples of similar projects Your estimated price range for this type of engagement Your availability and estimated timeline Note: The Developer Brief and prototype are provided only after NDA is signed.

  • Fixed price
  • Expert
  • Est. budget: $108,000.00

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.

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