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Senior Software Engineer (MERN + LangChain)

  • Remote, India
  • Full-time
  • ₹30-45 LPA

We built an AI that runs the first round of a job interview out loud. It asks the questions, listens, follows up on what the candidate actually said, and shows the evidence behind every score.

InterviewSparrow builds each interview from the candidate's resume and the job description. The candidate speaks, not types, and shares their screen for the part where they show their work. About three minutes after the call ends, the report is ready: a verdict, seven scored dimensions, and under every score the exact sentence the candidate said. Candidates use it to practice. Hiring teams use the same interview as their AI first round.

The product is live. We're hiring a Senior Software Engineer to build what comes next.

What you'll do

  • Build features end to end across the stack: React on the front end, Node and Express services, MongoDB.
  • Work on the LLM layer with LangChain: interview flow, follow-up questions, scoring against rubrics, pulling evidence from transcripts, and the evals that keep it honest.
  • Keep live voice sessions fast and stable, and get every report out on time.
  • Review code and mentor one or two engineers.
  • Push back on scope when something isn't worth building.

What you bring

  • You have built and run production apps on MongoDB, Express, React and Node.
  • You have shipped LLM features to real users with LangChain or LangGraph, and you know where prompts break.
  • You take a feature from the first commit to production, and you fix it when it breaks.
  • You explain trade-offs in plain words.
  • Nice to have: real-time audio or WebSockets, evals for LLM output, AWS.

There's no years-of-experience bar. We care about what you've built, not how long it took.

What you'll get

  • ₹30-45 LPA.
  • Fully remote, anywhere in India.
  • A live AI product, and a small team where your work ships the same week.
  • Real ownership of parts of the product people use every day.

Curious what you'd be building? The sample report is open to anyone. Bring one thing you'd change to our first call.

Also hiring: Staff Software Engineer (MERN + LangChain), Software Developer (MERN)