Full-Stack/Backend Developer for SaaS MVP

Seeking a highly skilled and cost-conscious Full-Stack/Backend Developer to build the Minimum Viable Product (MVP) of a data-driven SaaS platform. The core responsibilities include developing the backend architecture, integrating APIs, and ensuring data security and scalability. The ideal candidate will have experience with AngularJS, PHP, HTML5, and JavaScript. Required Technical Skills: • Backend Frameworks: Advanced proficiency in Python (FastAPI) or Node.js (TypeScript) for building high-performance, asynchronous endpoints and webhooks. • Relational Databases: Strong expertise in PostgreSQL—must be capable of designing highly efficient table schemas, indices, and direct SQL queries to process numerical data without relying on LLM overhead. • Vector Databases & RAG: Practical experience working with open-source vector databases like Qdrant or Milvus, including chunking strategies and semantic context extraction. • AI & LLM Integration: Deep understanding of API integration with major LLMs (OpenAI, Anthropic). Proven experience in Prompt Engineering, structured JSON outputs, and implementing strict API Guardrails to control token consumption and prevent loops. • Automation: Experience building and scheduling decentralized background tasks and cron pipelines (e.g., Redis Queue, Celery, or similar). • Frontend (Plus): Ability to build clean, responsive dashboard interfaces and chat UIs using React.js / Next.js and Tailwind CSS. Candidate Requirements: • Must have a clean, documented coding style (preferably shared via a GitHub portfolio). • Ability to strictly follow structured Technical Specifications and system architecture boundaries. • Strong communication skills and responsiveness during agreed-upon working hours. • Willingness to track hours transparently using the platform's time-tracker tool.