Piyush Gambhir.

Software Engineer II · Voice AI, Real-Time Infrastructure & Agentic Engineering

[email protected]·piyushgambhir.com·GitHub·LinkedIn

I run production voice agents on LiveKit and contribute upstream to the LiveKit Agents SDK (eight merged PRs across the Python and Node frameworks). At Spyne I took a conversational AI platform from zero to production, then led its migration onto LiveKit. I build with agents too: spec-first delegation to coding agents with verification gates, shipping Go, Python, and TypeScript in the same week.

Experience

Software Engineer II

Spyne · Full-time · Gurugram, India

May 2026 to Present

Leading the migration of production voice agents from Vapi to LiveKit Agents, owning architecture, telephony and SIP integration, and rollout, and collaborating directly with LiveKit’s engineering team along the way.
Contributed upstream to the open-source LiveKit Agents SDK: eight merged PRs across the Python (livekit/agents) and Node (livekit/agents-js) frameworks. They expose OpenAI Responses API controls used in production and preserve the original caller ID on Twilio warm transfers.
Took voice-agent infrastructure cost from $0.26 to $0.10 per minute in our deployment, roughly 62%, alongside the LiveKit migration and the provider and pipeline tuning that followed.
Scaling Spyne’s production conversational AI stack to support increasing traffic, concurrency, and reliability requirements, and strengthening it through disaster recovery, failure handling, and production readiness work.

Software Engineer I

Spyne · Intern from Jan 2024, full-time from Jan 2025 · India

Jan 2024 to May 2026

Built Spyne’s production conversational AI stack from zero to one on Vapi, powering dealership lead handling, follow-ups, and customer conversations, then began laying the groundwork for the transition to LiveKit.
Improved agent responsiveness and conversation quality through prompt optimization, streaming pipelines, turn-taking improvements, and infrastructure tuning.
Built the core telephony layer across Twilio, Vonage, and Telnyx, including caller identity, CNAM lookup, STIR/SHAKEN support, banned-number filtering, and A2P 10DLC workflows.
Shipped full-stack systems across inventory ingestion, dealer websites and CMS, CRM workflows, lead management, and automated customer follow-ups.
Rebuilt my development workflow around coding agents: spec-first delegation, parallel runs, and verification gates before accepting a diff. Monthly commits across 15 production repositories went from 50 to 90 up to roughly 300.

Projects

Conversational Voice Agents

Write-up

Provider-neutral control plane for production voice agents, with interchangeable LiveKit and Pipecat workers driven by one typed call profile.

Telephony Voice Simulator

GitHub Write-up

Provider-neutral test platform for voice agents, AMD, IVRs, PBX routing, live carrier behavior, recordings, and automated grading.

Reckon + Operations CLI Suite

GitHub Live Write-up

Read-only production incident workspace plus Go CLIs for Grafana, Elasticsearch, Jenkins, Jira, CubeAPM, and Nginx Proxy Manager.

Document OCR

GitHub Write-up

Local-first OCR toolkit for passports and Indian KYC documents, distributed as Python and TypeScript libraries with HTTP and Docker interfaces.

Skills

Agentic Engineering

Claude CodeCodexSpec-first delegationMulti-agent orchestrationVerification loops

AI & Voice

LiveKit (Agents, SIP, Cloud)PipecatVapiLLMsRAG

Telephony

TwilioVonageTelnyxSIPWebRTC

Languages

TypeScriptPythonGoSQL

Backend & Data

Node.jsNestJSFastAPIPostgreSQLRedis

Web

Next.jsReactTailwind CSS

Infrastructure

AWSDockerKubernetesCI/CDObservability

Writing

Voice agents in production

Series

Six-part field guide at piyushgambhir.com/voice: the LiveKit migration, turn-taking, voicemail detection, cost per minute, caller identity, and the carrier layer.

Education

The NorthCap University

B.Tech (AIML), Computer Science

GPA: 8.55 / 10

2021 to 2025