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Full Stack DeveloperFreelanceJobsCanada
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Full Stack Developer

FreelanceJobs
  • CA
    Canada
  • CA
    Canada

About

We have an existing SaaS platform built with FastAPI (Python), React (Vite), and PostgreSQL. The platform integrates with the Anthropic Claude API. It is functional and we need a developer to harden, stabilise, and deploy it for customer-facing use.
Phase 1 (approx 20–40 hours): Security hardening (auth, multi-tenant data isolation, API authorisation, input sanitisation, encryption, audit logging). Production deployment (Railway, Render, or AWS) with HTTPS, environment config, CORS, and monitoring. Bug fixes - root cause fixes, not patches.
Phase 2 (approx 10–20 hours): AI analysis consistency and reliability improvements. Structured prompt engineering, result caching, and output validation to ensure deterministic, comprehensive results from LLM API calls. Experience with prompt engineering and LLM API integration required.
Ongoing (approx 5–10 hours/week): Feature development, document processing, UI improvements, and continued stability work.
Working style: Fully async via GitHub Issues. Branch-based workflow (feature branches, PRs to main). Clear acceptance criteria on every task. Detailed brief shared under NDA.
Contract duration of 1 to 3 months.
Mandatory skills: JavaScript, Python, API, HTML, CSS
  • Canada

Languages

  • English
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