Full-Stack Engineer

Full-Stack Engineer 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 new 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 for real customers.
• Bonus: experience with voice AI, telephony, real-time systems, or LLM pipelines.

Why OneInbox

• Generational impact: build the voice layer that every APAC enterprise eventually runs on.
• Ownership culture: you'll work close to the founders and ship in days, not quarters.
• Kind, high-bar team: senior operators who've built and led at scaled companies — and are easy to work with.
• Strong backing: institutional investors and committed enterprise customers from day one.

What we offer

• Real ownership: competitive salary and meaningful equity for early team members.
• Health coverage: medical, dental, and vision for you and your dependents.
• Team time: regular in-person off-sites across Tokyo, Singapore, Dubai, and Bengaluru.
• Flexible time off: take what you need, when you need it.
• Learning budget: dedicated annual L&D, plus conference and travel support.
• Daily essentials: catered meals on office days, commuter support, and wellness benefits.

Apply for this role