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Harshdeep Singh

Resume

Harshdeep Singh

Backend Engineer — Real-time Systems & AI

Selected work

  • Semantask

    Real-time work coordination

  • Knowledge Workbench

    Research with hybrid retrieval and citation-grounded answers

Core engineering areas

  • Real-time communication

    Socket.IO, Redis adapter, presence

  • Asynchronous processing

    Transactional outbox, leased workers

  • Reliability

    Layered idempotency, failure handling

  • Retrieval

    Postgres full-text + Qdrant, rank fusion

  • LLM integration

    Provider abstraction, tool calling

Open source

TanStack AI

Merged pull requests: provider integrations, streaming and error handling, runtime type safety.

Rocket.Chat

TypeScript typing pull request (open).

Education

BCA, Rayat Bahra University, 2026

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