SDE 3  ·  FULL-STACK  ·  MUMBAI, IN

Manav Jain

I build products
that go from zero to scale.

Backend, frontend, firmware, and the teams that ship them. Currently driving Performance Labs at Ultrahuman.

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I like the hard, ambiguous problems — the zero-to-one bets nobody's run yet. I've learnt a framework in two days to ship a government app to 1.8M people, scaled a platform 40×, and led teams that own the work from spec to on-call.

0
users reached
Mahakavach · COVID contact tracing
0
sessions scaled
Code360 · 50K → 2M
0
new markets launched
AR · TR · VI · NL · PL localization
0
years in production
govt · edtech · health · hardware
01

Selected work

Bets owned end-to-end — from spec to ship to on-call.

Ultrahuman · 0→1 2025 →

Performance Labs

Ultrahuman's in-clinic diagnostic offering, built end-to-end. I owned the entire patient journey — booking, check-in, station-by-station data capture, AI-generated health reports, and doctor review.

  • Patient flow
  • AI reports
  • Clinician tooling
Ultrahuman 2025

UH Lite

HealthKit / Health Connect product for non-Ring users. Ported sleep, recovery and movement scoring to phone-only data — unlocking the market beyond Ring owners.

  • HealthKit
  • Health Connect
  • TAM unlock
Ultrahuman · AI 2025

AI Translation Pipeline

An AI localization pipeline that scaled the app into Arabic, Turkish, Vietnamese, Dutch and Polish — five new markets, shipped without a human translation team.

  • LLM pipeline
  • 5 languages
  • i18n
Ultrahuman · Infra 2025

Controlled Firmware Rollouts

Built controlled, staged DFU rollouts that de-risked every Ring firmware release — bringing software-grade release safety to hardware in the wild.

  • OTA / DFU
  • Staged rollout
  • Risk control
Coding Ninjas '20–'25

Code360 Platform

Scaled sessions 40× (50K → 2M) through deep codebase optimization. Shipped Guided Paths, Contests with leaderboards, proctoring and data filtering — and led the team of 4 building the React Native app.

  • 40× scale
  • Contests
  • React Native
Coding Ninjas · Growth '20–'25

Fault-tolerant Lead Engine

A fault-tolerant lead-delivery system to the calling CRM that became the company-wide standard — plus an immutable order ledger and a custom A/B + rollout engine for logged-in and logged-out users.

  • Distributed
  • Immutable ledger
  • A/B engine
02

The path

Government to edtech to health-tech — always close to the metal and the user.

  1. Shipping across backend, frontend and infrastructure — driving several of the company's biggest product bets from zero to production, owning each from spec to ship to on-call.

    • Led the end-to-end build of Performance Labs, the in-clinic diagnostic product.
    • Delivered UH Lite for non-Ring users via HealthKit / Health Connect.
    • Built the AI translation pipeline — 5 new language markets.
    • Engineered controlled firmware rollouts de-risking every Ring DFU.

  2. Wore many hats across technology, data and product through hyper-growth.

    • Led the growth team — lead conversion, attribution & prioritization across landing pages, checkout, enrolment dashboards and 3rd-party integrations (Leadsquared, payment gateways, cAPI).
    • Built a fault-tolerant lead-delivery system that became the company-wide standard, an immutable order ledger, and a custom A/B + rollout system.
    • Scaled Code360 sessions 40× (50K → 2M); shipped Guided Paths, Contests, leaderboards & proctoring.
    • Led a team of 4 building the Code360 React Native app.

  3. Partnered with the Maharashtra government to build a health-tracking & contact-detection app at the onset of COVID-19.

    • Backend lead — learnt Express.js in two days and wrote the Python contact-detection pipeline from scratch.
    • Led a self-volunteered remote team of 5.
    • Scaled to 1.8M users and 4M requests / month.

  4. Tackled two-wheeler road safety in India with a platform that incentivizes better riding.

    • Led a team of 6 across a multi-stakeholder application suite.
    • Built a patent-pending hardware solution to detect tilt, speed and riding behavior.
03

The toolkit

Comfortable across the whole stack — and the seams between them.

Distributed systems that don't lose data when things go wrong.

Node.jsExpress.jsPython JavaREST APIsMongoDB System designFault-tolerant systems Immutable ledgersQueues & delivery Payment gateways

Interfaces and flows that convert, and stay fast at scale.

ReactReact NativeTypeScript JavaScriptPerf optimization A/B & rollout systemsCheckout & landing flows Dashboards

Shipping safely — to servers, phones, and rings in the wild.

Firmware OTA / DFUStaged rollouts Feature flagsControlled releases 3rd-party integrationsAttribution / cAPI On-call & ownershipAI / LLM pipelines

Teams that own outcomes, not tickets.

Team leadership (4–6)Zero-to-one product Spec → ship → on-callMentoring Cross-functionalSetting standards
04

Proof of work

Beyond the day job.

Open source · GSoC 2018

p5.js Android Debugger

A Java debugger for the p5.js Android compiler, built with The Processing Foundation.

 Published paper · 2018

iBeacon Indoor Positioning

Indoor positioning systems for airports — Intl. Journal of Computer Applications, Vol. 179.
Award · 2018

2nd Runner-Up — SIH

Smart India Hackathon (MOSPI track): digitizing CPI item-price collection for the Ministry of Statistics.

Award

1st Runner-Up — Dishathon

A lead-management tool for DishTV that cut acquisition, handling and conversion costs.

Open to the hard problems

Let's build
something that scales.