Ankur Kumar Singh

Horizontally scalable real-time messaging on a Kafka + Redis backbone.

Distributed chat platform designed for scale: Redis Pub/Sub for cross-server Socket.IO broadcast, Apache Kafka decoupling high-throughput ingestion from PostgreSQL persistence, TurboRepo monorepo deployed across Vercel and Render.

Node.js · TypeScript · Socket.IO · Redis · Kafka · Prisma · PostgreSQL · Next.js

• +

  Sustained 100% core-messaging availability during Redis/Kafka outages via graceful fallback to direct broadcast.

• +

  Founded fault tolerance with graceful degradation across a TurboRepo monorepo.

Full-stack research platform with role-based access and a PubMed search pipeline.

Research collaboration platform with RBAC across 3 roles and JWT auth. Literature search integrates the NCBI PubMed API with a custom XML parser and caching layer.

React · TypeScript · Node.js · Express · MongoDB

• +

  Improved team collaboration efficiency by 40% with role-based access control (RBAC) and JWT auth.

• +

  Cut redundant upstream API calls by 60% via a custom PubMed XML parser and caching layer.

• +

  Boosted search recall by 35% on plain-language queries with a MeSH/UMLS query-expansion engine.

Fine-tuned LLM that steers responses across 16 psychological personas.

Full-stack AI chatbot that derives user psychological personas from a 30-question matrix. Fine-tuned a Mistral base model with QLoRA (4-bit) + Hugging Face PEFT on 150,000+ dialogue pairs, with DPO emotional alignment and pgvector RAG.

React · Node.js · PostgreSQL · Mistral · QLoRA · AWS

• +

  Fine-tuned Mistral with QLoRA (4-bit) and PEFT on a 150,000+ pair corpus with DPO emotional alignment.

• +

  Integrated pgvector-backed RAG for dynamic context injection.

Real-time multi-tenant helpdesk with an autonomous AI triage agent.

Enterprise helpdesk using WebSockets for zero-latency live messaging and presence. Multi-tenant Prisma schema enforcing RBAC and strict data isolation; LangChain agent triages tickets with semantic vector search for automated L1 resolution.

React · Node.js · PostgreSQL · WebSockets · Prisma · LangChain

• +

  Built real-time messaging + presence with WebSockets across concurrent sessions.

• +

  Enforced RBAC and tenant-data isolation with a multi-tenant Prisma schema.

• +

  Integrated a LangChain agent for automated Level-1 ticket triage via vector search.

Agentic orchestration layer with autonomous tool-calling, deployed on DigitalOcean.

Engineered an agentic orchestration layer using local LLMs (Hermes/OpenClaw) with autonomous tool-calling and multi-step reasoning pipelines to resolve compound queries. Inference engine + agentic backend deployed on a DigitalOcean droplet with robust REST endpoints.

Python · DigitalOcean · LLM Agents · API Design

• +

  Implemented autonomous tool-calling and multi-step reasoning pipelines for compound queries.

• +

  Deployed inference on a DigitalOcean droplet exposing REST APIs for external clients.

• +

  GTM-focused modular architecture for fast adaptation across use cases.