Senior Software Engineer - Backend

About the role

ABOUT HAPPYROBOT

HappyRobot is the infrastructure for enterprises to build and orchestrate AI workforces. Our AI workers don't just communicate through voice and email - they make decisions, take action, and run operations autonomously across entire enterprise systems. Born in Y Combinator (S23) and backed by a16z, Base10, Prysm Capital and Eurazeo with over $150M raised, we power critical operations for global enterprises worldwide.

Our platform is battle-tested in the most demanding environments, where AI has real consequences. We started in logistics, built our own voice stack, models, and orchestration layer from the ground up, and are now bringing that infrastructure to every enterprise that runs the real economy. Learn more about our vision in our manifesto. https://www.happyrobot.ai/blog/manifesto

Role Overview

We are looking for a versatile and highly skilled Senior Backend Software Engineer to join our team. This person will own meaningful parts of the product and infrastructure end-to-end. We’re looking for builders who thrive in ambiguity, care deeply about craft, and want real ownership over what they create.

WHAT WE’RE LOOKING FOR

- 5+ years of professional experience

- Strong backend engineering experience, with a focus on building scalable systems

- Experience with Go or a strong willingness to work in Go in production

- Solid understanding of system design, APIs, data modeling, and service reliability

- Product-oriented mindset and comfort making tradeoffs in a fast-moving environment

- Experience operating and maintaining production services

WHAT YOU’LL DO

- Design, build, and operate backend services that support our core product

- Improve system reliability, performance, and observability

- Work on real-time infrastructure that powers voice-based AI workflows

- Collaborate closely with frontend engineers, product, and founders

- Ship to production frequently and iterate based on customer needs and system behavior

WHY JOIN US?

- Join a world-class team of engineers and builders.

- Backed by top investors including a16z, Y Combinator, Base10, Prysm Capital and Eurazeo.

- Have ownership and autonomy of projects and are encouraged to ship.

- Comprehensive Benefits including healthcare, dental, vision coverage.

- Competitive salary + equity in a high-growth startup.

Our Operating Principles

Extreme Ownership

We take full responsibility for our work, outcomes, and team success. No excuses, no blame-shifting — if something needs fixing, we own it and make it better. This means stepping up, even when it’s not “your job.” If a ball is dropped, we pick it up. If a customer is unhappy, we fix it. If a process is broken, we redesign it. We don’t wait for someone else to solve it — we lead with accountability and expect the same from those around us.