We are building a production SaaS platform called MarketLens, designed for investment teams and analysts who need real-time market intelligence combined with AI-generated insights and portfolio tracking tools. What You’ll Do - Build and maintain the core backend services in Python (FastAPI / Django) - Develop frontend dashboards using React (TypeScript preferred) - Integrate real-time data pipelines (WebSockets, streaming APIs, or message queues) 1. Implement AI features such as: 2. Market summarization using LLMs 3. Portfolio risk explanations 4. Automated insight generation from time-series data - Design and maintain scalable APIs for analytics and user data - Work on subscription and billing logic (Stripe integration) - Improve system performance, especially around data freshness and dashboard latency - Participate in architecture decisions for scaling AI + data workloads Our clients are small to mid-sized hedge funds and financial advisory teams who currently rely on fragmented tools like Bloomberg exports, spreadsheets, and separate analytics dashboards. MarketLens aims to unify all of this into a single workflow.

Title: Backend Developer — AI Data Pipeline, Vector DB & Real-Time Push API Post: We are building an automated backend system that continuously crawls public web sources, processes and indexes content using AI, and delivers updates via webhooks. Looking for someone who has built this type of system before and can move fast. NDA required before project details are shared. What you’ll build: • Web crawler network —. • AI processing pipeline — cleans, deduplicates, chunks, and embeds ingested content into a vector database using an LLM embedding model. Quality scoring and incremental updates required. • Push API — monitors for significant content changes and delivers updates via webhook endpoints automatically. Includes configurable push schedules per subscriber, REST query endpoint, API key authentication, and token usage tracking per key. Tech stack (flexible — use what you know best): • Python (FastAPI) or Node.js • Any vector DB — Pinecone, ChromaDB, Supabase • Any LLM API — Anthropic or OpenAI • Any scheduler — n8n, APScheduler, cron • Redis for queue management • Railway, Render, or AWS for deployment Requirements: • NDA signed before kickoff — non-negotiable • Must have built RAG pipelines or vector DB systems in production — not tutorials • Must have experience with web crawlers and scheduled job pipelines • Must have experience with webhook delivery systems • GitHub or portfolio showing relevant deployed work required • 95%+ Job Success Score preferred • Individual contractors only — no agencies To apply include: • Example of a similar system you’ve built — web crawler, RAG pipeline, or push notification API • Your preferred stack for this type of build • Brief technical approach in 3–5 sentences • Hourly rate and availability to start Budget: $50–$80/hr Timeline: 3 weeks — focused sprint with daily check-ins

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

Work description We are looking for an experienced Java / Spring Boot developer who can help design and build backend applications with AI integration. The ideal candidate should have strong experience in Java-based microservices, REST APIs, cloud deployment, and integrating AI/LLM services into business applications. The work may include building APIs, connecting with AI models, integrating OpenAI/Azure OpenAI/LLM services, creating AI agents or automation workflows, and improving existing backend systems. Responsibilities: Design and develop scalable backend services using Java and Spring Boot. Integrate AI/LLM APIs such as OpenAI, Azure OpenAI, LangChain4j, Semantic Kernel, or similar tools. Build RESTful APIs for AI-powered features. Work with databases, authentication, external APIs, and cloud services. Optimize performance, security, and reliability of backend services. Write clean, maintainable, and well-tested code. Troubleshoot production issues and improve existing applications. Required Skills: Strong experience with Java 8/11/17+ and Spring Boot. Experience with REST APIs, microservices, and JSON. Hands-on experience integrating AI/LLM APIs. Knowledge of prompt engineering, embeddings, RAG, vector databases, or AI agents is a plus. Experience with SQL/NoSQL databases. Familiarity with AWS, Azure, or GCP. Good communication and ability to work independently. Preferred Skills: Azure OpenAI or OpenAI API integration. LangChain4j, Spring AI, or Semantic Kernel experience. Vector DB experience such as Pinecone, Chroma, Weaviate, FAISS, or Azure AI Search. Docker, Kubernetes, CI/CD knowledge. Healthcare, finance, or enterprise application experience is a plus. Project Goal: We need a Java expert who can help us build AI-powered backend features and integrate them into our existing application in a scalable and secure way. To Apply: Please share examples of Java/Spring Boot projects you have worked on, especially any projects involving AI, LLMs, automation, or API integrations.

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.

Expectations include setting up development, staging and production environments in AWS, creating and managing the CI/CD pipeline and support for front end development and integration with the API.

Core Architectural Workflow 1. Client Intake & Data Collection The customer visits the Porkbun-hosted website and completes a secure, multi-step intake form. The form dynamically captures customer details, the specified number of signers, and handles secure multi-file document uploads. 2. Asynchronous API Triggering Blue Notary API: The website backend instantly delivers an API payload to Blue Notary to establish the live signing session container, pushing the customer data and uploaded document streams directly into the digital meeting room. QuickBooks Online API: Simultaneously, the backend contacts QuickBooks to check for an existing client record or generate a new Customer Profile. 3. Credit Card Tokenization (Vaulting) To maintain absolute data security and avoid PCI-compliance liabilities, the developer will embed the QuickBooks Web Payments SDK directly into the booking page. When the client clicks "Book," the secure iframe captures and tokenizes the credit card information with QuickBooks Payments, returning a secure payment token (paymentMethodToken). The website backend securely maps this token to the customer profile for later use; no actual credit card numbers are ever stored on our servers. 4. Post-Session Admin Portal & Dynamic Billing Because RON platforms track identity verification but do not consistently pass live, rolling digital stamp/seal counts to external billing systems in real time, the developer will construct a secure, password-protected administrative interface on our domain (e.g., /admin/billing). Upon logging out of a completed Blue Notary session, the admin opens this dashboard, selects the client, and types in the Actual Signers and Actual Seals Placed. Automated Billing Logic Formula Upon submitting the administrative form, the server executes the programmatic pricing formula: Total Invoice = Base Session Fee + (Additional Signers × Signer Rate) + (Additional Seals × Seal Rate) The backend automatically executes these final steps via the QuickBooks API: Generates a professional line-item invoice reflecting the base fee and exact volume variables. Commands QuickBooks Payments to immediately process the charge using the vaulted credit card token. Locks in the clean processing rate (e.g., flat 2.99% invoiced rate) with zero added per-transaction service fees or third-party overhead. Triggers the automated delivery of the official QuickBooks paid receipt directly to the client's inbox. Developer Job Posting Copy Project Overview: Looking for a talented full-stack developer to redesign/update a website hosted on Porkbun, build a custom multi-signer intake form with secure document upload, and integrate direct, custom backend automations with Blue Notary and QuickBooks Online. No third-party automation tools (Zapier/Make) are permitted. Key Deliverables: Frontend Intake Form: Clean, mobile-responsive design allowing secure file uploads and dynamic forms based on input signer counts. Direct Blue Notary Integration: Connect to Blue Notary’s REST API to instantly initiate a session and pass files upon customer submission. QuickBooks Payments SDK Integration: Implement secure credit card vaulting/tokenization at intake using the official QuickBooks Web Payments SDK. Admin Post-Session Billing Tool: Create a lightweight, secure internal portal where the admin inputs final signer and seal counts. Automated Invoicing Engine: Calculate the final pricing via code on admin submission, generate a line-item invoice in QuickBooks, charge the vaulted card token automatically, and trigger the receipt. Technical Requirements: Proven experience with backend languages (Node.js, Python, PHP, or Go). Deep familiarity with QuickBooks Online Accounting & Payments APIs (specifically tokenized card charges and invoice generation). Strong understanding of REST APIs, webhooks, JSON payloads, and secure file handling over HTTPS. Ability to deliver clean, documented, standalone code without external platform dependencies.

I'm looking for a skilled developer who can move fast, think creatively, and act more like a partner than a contractor. If you're someone who builds things quickly, brings ideas to the table without being asked, and genuinely cares about creating great experiences for end users, keep reading. -—————- **What You'll Be Working On:** This product sits at the intersection of AI, data, and customer experience. At its core, it needs to: - Monitor and process large volumes of data** in or near real time — surfacing insights, anomalies, and patterns that matter. - Send automated personalized outreach via SMS and email — based on the data signals and triggers, the system should be able to generate and send personalized messages to the right person at the right time, without manual intervention - Integrate with POS systems and CRMs** — pulling, syncing, and acting on data across platforms - Deliver a seamless, intuitive customer-facing experience** — this isn't just a backend tool, how users feel when they interact with it matters enormously - Be built on top of **Claude (Anthropic's AI)** using **Claude Code** as a core part of the development workflow We're in early stages, which means we're figuring things out as we go. That's not a warning — it's an opportunity for the right person. --- **What I'm Looking For:** - Hands-on Claude Code experience** — you've actually built with it, not just read about it. Experts only please - CRM and POS integration experience** — you've connected to platforms like Salesforce, HubSpot, Square, Toast, Lightspeed, or similar, and you know the quirks - Data monitoring and pipeline experience** — you've built systems that ingest, process, and surface meaningful signals from large datasets - Customer experience mindset** — you think about the end user constantly, and you've built tools that real customers interact with - Fast builder, fast thinker** — you're comfortable with ambiguity, can ship quickly, and know how to iterate without everything being perfectly defined upfront - Collaborative and opinionated** — I want someone who pushes back, brings ideas, and helps shape where this goes — not someone waiting for a spec I also want to **learn as we build** — so being able to explain what you're doing and why, in plain terms, is important to me. --- A Note Before You Apply: Please only submit a proposal if you have deep, hands-on experience with Claude Code — not surface-level familiarity, not currently learning it. We're looking for someone who has already put in the reps, knows the ins and outs, and can hit the ground running from day one. We respect your time and ask that you respect ours. If Claude Code isn't already a tool you've mastered, this isn't the right fit. **When You Apply, Please Include:** - Specific examples of tools you've built that involve **CRM or POS integrations** — name the platforms and describe what you built - Examples of **data monitoring or real-time data tools** you've worked on — what did it track, how did it work, what was the scale? - Any **AI-powered products** you've shipped, especially using Claude or other LLM APIs — links, screenshots, or descriptions - How you approach building something when the full picture isn't defined yet - A thought or two on what makes a truly great AI-powered customer experience — I want to see how you think --- **What This Could Become:** This is the beginning of something bigger. The right person won't just be a hire — they'll grow with the product. There's real potential for a long-term working relationship as this evolves.

Before you apply read this first.: This is not a standard contract. We are not looking for someone to build something and disappear. We are looking for a developer who genuinely cares about people experiencing homelessness and wants to be part of something that actually changes lives. If that is not you, this post is not for you. If it is keep reading. What Is Operation Iron Gate: Operation Iron Gate is a physical intake hub in Vallejo, California built specifically for the unsheltered. Any homeless person can walk through our door and receive help no matter what barriers they are carrying, no matter what their documentation looks like, no matter how many times they have been turned away before. The rule is simple: nobody gets denied. We call it Yes by Default. Instead of looking for reasons to say no, we look for the next valid move. Every single time.When someone walks in, a case gets opened immediately. Every barrier they are facing gets documented. A next step gets started before they leave the building. And the system tracks every single movement of that case every action, every referral, every handoff until they actually receive the resource they need. Not a phone number on a piece of paper. The actual resource. It sounds too good to be true. That is exactly why we built the technology to make it real. What You Are Building — Phase 1 Only: We are currently hiring for Phase 1 only. This is the core platform build. We are keeping it focused. Once the pilot launches in Vallejo and the system is proven in the real world, we will move into the AI layer and long-term development. But right now we need Phase 1 built right. The platform is called DSAS the Digital Steward Authorization System. It is the brain of Operation Iron Gate. Here is what Phase 1 covers: * Case creation engine when someone walks through the door, a case opens immediately. One screen, one submit. * Barrier capture system every barrier the person is facing gets documented and connected to a next action. * Yes by Default enforcement a denial without a legal reason code is blocked by the system itself at the database level. * Three-tier triage system urgent cases get a 2-hour movement deadline with auto-calculated countdown. * Steward escalation queue hard cases route instantly to senior reviewers who make binding decisions. * MDO Live View: real-time monitoring screen showing every active case, who owns it, where it is stuck, how long it has been sitting. * Automated alert engine fires when a case stalls, when a deadline is missed, when a partner does not respond. * Glass Dashboard public-facing transparency layer showing the community how the system is performing in real time. * All data feeds automatically from the system. No manual entry ever. * IGAC credential system when someone arrives without ID, a credential is issued immediately on Day 1 so the case can keep moving. * 7-role permission matrix enforced at the API level on every endpoint. * Append-only audit trail tamper-evidence logging. Nothing gets deleted or edited after it is written.. The full technical specification is already built: * Every database field is named. * Every logic rule is written. * Every automated alert is defined. * Every role permission is mapped. You are not figuring out what to build. You are building something that is completely designed and ready to be coded. Technical Requirements Required: * Strong backend / full-stack development 3+ years building complex platforms * Relational database expertise PostgreSQL or MySQL complex logic enforced at the database level * Role-based access control enforced at the API level * Automated alert engines time-based and condition-based triggers * Append-only audit logging with tamper evidence * Real-time data feeds * REST API development Strongly preferred: React or similar framework for front-end interfaces. Mobile-responsive design Access Points may operate from tablets and phones. Civic tech, social services, healthcare, or government platform experience. We are open to your stack recommendation. Tell us what you would use and why. Who We Are Looking For: We need someone who is technically strong. But more than that we need someone who reads about Operation Iron Gate and feels something. Someone who understands that every field in this database is a real person's life. Someone who will flag a problem in the spec before building it wrong. Someone who stays when things get hard. Someone who wants to be part of this mission not just compensated for it. If you are only here for the money, this is not the right fit. If you want to build something that matters we want to talk to you. Compensation: Read This Carefully: This is a fixed-price contract via Upwork with milestone-based payments. Here is exactly how it works and why we structured it this way. We are paying in four milestones. Every single payment is tied to something real being delivered and confirmed not just promised. * 25% on project start you have skin in the game from day one and so do we. * 25% when the database and core logic is confirmed complete confirmed by the developer handoff checklist, not by your word alone. * 25% when the full intake flow and MDO Live View is confirmed complete again, confirmed by the checklist. * 25% at final sign-off when every single item on every Tier 1 handoff checklist is confirmed complete Nobody gets paid until something real is delivered and confirmed. The checklist is the protection for both of us. You cannot say something is done and collect payment if the checklist says otherwise. That is not a lack of trust that is how professional projects get built correctly. There is one more thing we need in this contract and we want to be upfront about it. The contract will include a scope change clause. That means if we ask you to build something that was not in the original specification something we did not think of, something new that becomes a change order and gets priced separately. It does not get quietly absorbed into the fixed price and it does not become a source of resentment on either side. You build what is specified. Anything beyond that gets negotiated openly and fairly. Fixed rate. Milestone payments. Handoff checklist as the payment trigger. Scope change clause in the contract. That is how we protect Pathfinders for Hope's mission funding and make sure you get treated fairly too. Additional terms: * NDA required before any specifications are shared * Work-for-Hire Agreement required before development begins all code belongs to Pathfinders for Hope * Rate is negotiable based on experience To Apply: Submit your proposal with your answers to all eight questions, a description of your most relevant project, your recommended stack, your honest Phase 1 timeline estimate, and your rate. We are building the operating system that proves homelessness can be solved one city at a time. If that is the kind of work you have been waiting for, we want to hear from you.

We're a pre-launch sports event app (Flutter mobile app + Django REST backend) preparing for App Store and Google Play submission. We need to migrate our subscription billing from Stripe to native in-app purchases (Apple StoreKit + Google Play Billing) before we can ship. The work is well-scoped: monthly + annual subscriptions, 7-day free trial, one subscription tier. No legacy users to migrate (no current Stripe subscribers). We have a written strategy document covering subscription lifecycle, edge cases (grace periods, refunds, restores), and store-side configuration — shared with shortlisted candidates.