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SUDHIR User
Looking for a jobBackend & AI Engineering
I build performant Node.js APIs and RAG systems with TypeScript and PostgreSQL.
IndiaBackend & AI Engineering at Self-Directed Projects
About
I've built three full-stack systems end-to-end, including Second Brain, ResearchOS, and MedBot, covering backend architecture, data modeling, API design, authentication, validation, logging, and error handling.
In Second Brain, I built 12 REST endpoints and improved API response time by approximately 40% through Redis caching and query optimization. I also implemented asynchronous URL enrichment with BullMQ workers, retries, exponential backoff, and Open Graph metadata extraction.
My work in generative AI includes RAG pipelines, semantic retrieval, LangChain orchestration, multi-agent research workflows, and pgvector-based cosine-similarity search using 768-dimensional embeddings.
Experience
Backend & AI Engineering
Designed and shipped three full-stack systems end-to-end, covering data modeling, API design, backend architecture, validation, authentication, logging, and error handling. Applied production-oriented practices including retries, exponential backoff, asynchronous processing, concurrency tuning, structured logging, and performance optimization across projects.
TypeScriptPostgreSQLPrismaRedisBullMQReactWebSocketsREST APIsRAGNext.js