I will build a scalable nodejs nestjs backend for your ai product and llm apis

B
bruno_cardso
B
bruno_cardso
Bruno C
build a scalable nodejs nestjs backend for your ai product and llm apis
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build a scalable nodejs nestjs backend for your ai product and llm apis

About this gig

  • Your AI feature is only as reliable as the backend behind it. I build Node.js/TypeScript backends with NestJS that turn LLM calls into a dependable product: fast, secure and easy to extend.
I've spent 8 years building backends for critical systems, including high-stakes platforms at XP, Banco Modal and LiveOn BaaS, where downtime and bugs weren't an option.

What I build:
- APIs that wrap LLM providers, with streaming, retries, fallbacks and usage tracking
- RAG backends: document ingestion, embeddings and vector search (PostgreSQL/pgvector)
- Queues and workers for long-running AI jobs (event-driven design)
- Tool/function endpoints and MCP servers for AI agents
- Auth, rate limiting, validation and OWASP-aware security
- Clean Architecture and DDD, so the code stays organized as you grow
- Tests, Swagger/OpenAPI docs and Docker

I also refactor existing Node.js backends to make them ready for AI features.

Send me your requirements, and I'll reply with a clear scope and an honest estimate.

  • AI engine

    • GPT
    • Gemini
    • Claude

  • Programming language

    • JavaScript
    • TypeScript
    • SQL

Get to know Bruno C

Bruno C

AI Engineer and Fractional CTO: Agents, RAG and LLMs in production

  • FromBrazil
  • Member sinceJun 2023

  • Languages

    English, Portuguese
AI engineer and fractional CTO. I build production AI products: agents, RAG, LLM integrations and MCP servers, on the solid engineering that critical products demand. 8 years shipping software, including high-stakes platforms at XP, Banco Modal and LiveOn BaaS. I turn vague AI ideas into clear scope, honest estimates and on-time delivery, and I cover the whole stack around the model: Node.js/NestJS, PostgreSQL, React/Next.js, React Native, Electron, AWS/GCP with CI/CD and Docker, and OWASP security. I've led teams of up to 7 engineers as a technical PO.

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