Lead Python Backend Developer React and LLM

Position Summary

KK Software Associates is seeking an experienced, highly technical, and accomplished Lead Python Backend Developer with React and LLM capabilities (12+ years total experience, with 7+ years of core engineering experience) to join our client team on an urgent backfill, onsite basis in San Francisco, CA, featuring immediate interview slots today. In this specialized full-stack and AI-augmented leadership role, you will spearhead designing scalable enterprise-grade backend services in Python, building production-grade frontend interfaces in React and Type Script, and orchestrating advanced LLM frameworks.

You will work closely with engineering squads, data architects, and product leads to deliver high-performance, real-time distributed applications. Ideal candidates bring a robust academic background in computer science, deep practical mastery of Python (Flask/FastAPI), Node.js, React, and LLM orchestration tools, and immediate availability for deployment in San Francisco.

As a Lead Python Backend Developer with React and LLM at KK Software Associates in San Francisco, CA, you will take full ownership of architecting performant backend service layers, designing high-throughput databases, and delivering responsive full-stack applications. Your day-to-day responsibilities encompass engineering high-throughput backend APIs using Python (Flask/FastAPI) and Node.js, building robust user interfaces with React and Type Script, and implementing real-time data streaming via Web Sockets and gRPC-web.

You will leverage modern AI tooling and LLM orchestration frameworks (Lang Chain, Llama Index, Smolagents, DSPy), manage high-performance caching layers with Redis, and utilize advanced developer workflows like the Cursor code editor to accelerate delivery velocity. Working in a fast-paced onsite environment with immediate interview slots today, you will drive technical excellence and mentor engineering talent.

• Lead the end-to-end design, development, and scaling of enterprise-grade Python backend services and React frontend interfaces.
• Architect performant service layers utilizing Python (Flask/FastAPI) and Node.js to handle heavy data mutations and workloads.
• Build production-grade, responsive user interfaces utilizing React, Type Script, and modern state management strategies.
• Implement expert-level real-time data synchronization using RESTful APIs, Web Sockets, and gRPC-web protocols.
• Design and maintain high-throughput relational/No
  
  SQL databases and caching layers (e.g., Redis) for seamless data life cycles.
• Integrate AI tooling and LLM orchestration frameworks (Lang Chain, Llama Index, Smolagents, DSPy) into production workflows.
• Apply advanced prompt engineering and utilize elite developer environments like the Cursor code editor (indexing, composer, chat features).
• Collaborate closely with product managers, system architects, and cross-functional engineering teams in San Francisco.
• Conduct rigorous code reviews, mentor junior and mid-level developers, and champion software engineering best practices.
• Maintain comprehensive technical documentation, architecture specifications, and API runbooks.

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, Information Technology, or a related field.
• 12+ years of total professional software engineering experience, including 7+ years of deep engineering and system design background.
• Core stack mastery in Python (Flask/FastAPI) and Node.js for backend development, combined with React and Type Script for frontend delivery.
• Proven expertise in system design, database architecture, caching layers (Redis), and scaling enterprise-grade backend services.
• Real-time…