Senior Full Stack Developer (Python/TypeScript)
Summary
Senior full-stack developer taking technical ownership of an AI-driven SaaS for professional services: building LLM agents, document processing, APIs, queues, and cloud infrastructure with Python/FastAPI and TypeScript/React. Contract role up to $20/hr for 6-8 months, English B1+.
Senior Full Stack Developer (Python/TypeScript)
English: B1+
Rate: Up to $20/hour
Employment: Full-time
Duration: 6-8 months
Start: In 2-3 weeks
About the Project
A rapidly growing SaaS startup focused on transforming the professional services sector through AI-driven software that streamlines complex workflows involving documents, search, and matter management.
Responsibilities
Take independent technical ownership of complex product and infrastructure features, from architecture and design through deployment.
Develop and improve AI-powered workflows, including LLM agents, document processing, and tool calling.
Architect reliable backend services, APIs, data flows, queues, and integrations with third-party systems.
Investigate and troubleshoot complex production issues across the full stack using logs and tracing.
Leverage AI development tools such as Claude Code, Cursor, and Codex in daily work to improve engineering efficiency and delivery speed.
Requirements
7+ years of commercial software engineering experience.
Strong knowledge of Python with FastAPI (or comparable frameworks) and TypeScript with React.
Advanced SQL skills and experience designing database schemas, ideally with PostgreSQL.
Solid understanding of cloud platforms (Azure, AWS, or GCP), Docker, and CI/CD workflows.
Strong architectural expertise in building reliable asynchronous systems, APIs, workers, and queues.
Practical experience implementing and maintaining production LLM functionality, agents, prompt workflows, and RAG/search solutions.
Hands-on experience with monitoring, metrics, observability, and tracing tools such as Datadog, PostHog, Langfuse, and OpenTelemetry.
Demonstrated ability to independently deliver production-ready solutions from start to finish.
