Founding builder on our 0→1 unit — turning enterprise voice problems into shipped products on top of the OneInbox platform.

0 to 1
Bengaluru, India (Hybrid)
Hybrid
Full-time
YoE 0 to 1

Apply now

About OneInbox

We're putting voice at the heart of how enterprises actually run.
We're the production-grade voice AI platform built for Japan and Asia-Pacific.
We're handling millions of real calls every month — in Japanese, English, Hindi, and Arabic — for banks, real estate firms, and government services.
Try OneInbox today.

Why we're hiring this role

We've earned the right to make a bigger bet on top of our core platform — and we need a builder who can run with it.
Enterprise voice has more unsolved problems than our roadmap can cover. This role exists to find and ship the next one.
This is the closest thing to a founding engineer seat without leaving the OneInbox platform behind you.

What you'll be doing

First 30 days

Sit in customer conversations alongside the founders to understand which problem we're betting on next.




Spin up a clean technical foundation on top of OneInbox's voice AI stack.
Ship a working prototype to a real customer within the first month.

First 60 days

Own the end-to-end stack — backend, frontend, integrations, deploy.
Run weekly customer feedback loops and turn them into shipped iterations.
Stand up the basics: telemetry, on-call coverage, deploy pipeline, error budgets.

First 90 days

Convert the prototype into a product the customer actively pays for.
Define which parts of the current unit live on the core OneInbox platform and which fork.
Help hire the next two engineers on the 0→1 team.

Who you are

3–6 years of full-stack experience — backend, frontend, and infra you've actually shipped.
Comfortable picking up a new system, reading docs, and shipping the same day.
Strong product instinct — you build for the outcome, not the spec.
You want to be a CTO or founder eventually, and you understand the path runs through building real things f

📌 Full-Stack Engineer (Bengaluru)
🏢 OneInbox.ai (Techstars '25)
📍 Bengaluru