E-commerce Full Stack App Development

Cliente Freelancer · Remoto · Remoto · freelance · mid · 15–25 USD

Publicada el 2026-07-17

Descripción de la oferta

The Role We are hiring a Full Stack Software Developer to build and ship AI-driven fintech products under the direct technical and product direction of the Principal & CIO. The flagship project is— a real-time, 24/7 AI tutor and trading co-pilot built on the Claude API, integrating our proprietary curriculum, market data, and quantitative research into a subscription product. This is a hands-on builder role. You will work the codebase end to end — backend, frontend, integrations, and deployment — and work in short, fast iteration cycles with the Principal who reviews work directly. What You Will Build A production LLM application on the Claude API / Agent SDK — streaming chat interface, retrieval over proprietary curriculum content, tool use against live market data feeds, per-user conversation memory, model tiering, and prompt caching for cost control Billing and metering: Subscription billing (Stripe or equivalent), usage metering, tier enforcement, and fair-use limits Platform integrations: Connections into our existing web platform, CRM, trading data services, and white-label partner APIs Compliance-aware infrastructure: Output logging, disclaimer enforcement, guardrails, and audit trails suitable for a regulated financial services environment Responsibilities Design, build, test, deploy, and maintain full-stack web applications from specification to production Implement LLM-powered features: prompt architecture, RAG pipelines, tool/function calling, streaming responses, and token-cost optimization Integrate third-party APIs: AI model providers, market data, payments, banking/brokerage rails, and partner platforms Build secure authentication, user management, and per-user data isolation Instrument the product: usage analytics, per-user unit-cost tracking, error monitoring, and uptime alerting Maintain clean, documented, version-controlled code with a deployment pipeline the founder can review Participate in rapid iteration: scoped weekly deliverables, direct feedback loops, and demo-driven progress reviews Flag technical risk, cost drift, and scope tradeoffs early and in writing Required Qualifications 4+ years of professional full-stack development experience with shipped production applications Strong proficiency in JavaScript/TypeScript and a modern frontend framework (React or similar) Strong backend experience in Node.js or Python, including REST API design, databases (SQL and/or NoSQL), and authentication Hands-on experience building on LLM APIs (Anthropic, OpenAI, or similar): prompt design, streaming, tool use, and embeddings/RAG Experience integrating payments (Stripe or equivalent) and at least one non-trivial third-party API Cloud deployment experience (AWS, GCP, Vercel, or similar), including CI/CD Excellent written communication; able to work asynchronously and document decisions Working-hours overlap with UTC+8 (Asia-Pacific time zone or flexible schedule) Preferred Qualifications Fintech or trading-platform experience: market data feeds, brokerage/banking APIs (Alpaca, DriveWealth, Unit, Plaid, or similar), or exchange integrations Familiarity with financial services compliance concepts (audit logging, KYC flows, disclosure requirements) Experience with the Anthropic Agent SDK, MCP, or agentic tool-use architectures Experience with WebSockets/real-time streaming interfaces and charting libraries Prior work in a founder-led startup or as an early technical hire Working Style You will work under the direct product and technical direction of the Principal — this role suits a strong executor who wants clear priorities, fast decisions, and full ownership of implementation Weekly sprint cadence with written scopes and demo checkpoints Async-first communication with scheduled overlap for reviews How to Apply Resume or LinkedIn profile Links to 2–3 shipped products or repositories you personally built, with a note on what you owned A short paragraph: describe an LLM-powered feature you have built, the model/API used, and one cost or latency optimization you made 9+3 + ?

Skills

Fuente original: freelancer

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