Senior Software Engineer - Backend

About HappyRobot

HappyRobot is the infrastructure for enterprises to build and orchestrate AI workforces. Our AI workers don't just communicate - they make decisions, take action, and run operations autonomously across voice, email, and enterprise systems. Born in Y Combinator (S23) and backed by a16z and Base10 with over $60M 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.

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?

• Opportunity to work at a high-growth AI startup, backed by top investors
• Rapidly growing and backed by top investors including a16z, Y Combinator, and Base10
• Ownership & Autonomy - Take full ownership of projects and ship fast
• Top-Tier Compensation - Competitive salary + equity in a high-growth startup
• Comprehensive Benefits - Healthcare, dental, vision coverage
• Work With the Best - Join a world-class team of engineers and builders

Our Operating Principles

• Extreme Ownership
• Craftsmanship
• Majo
• Urgency with Focus
• First-Principles Thinking

Talent Density and Meritocracy

• Hire only people who can raise the average; 'exceptional performance is the passing grade.'
• Ability trumps seniority.
• We believe the best teams are built on talent density — every hire should raise the bar.
• We reward contribution, not titles or tenure. We give ownership to those who earn it, and we all hold each other to a high standard.
• A-players want to work with other A-players — that’s how we win.

Personal Data Processing

Your personal data will be processed by Happyrobot, Inc., acting as Data Controller. By sending us your CV, you consent to the processing of your personal data for the purpose of evaluating and selecting you as a candidate for the position. Your personal data will be treated confidentially and will only be used for the recruitment process of the selected job offer. In relation to the period of conservation of your personal data, these will be eliminated after three months of inactivity in compliance with the GDPR and legislation on the protection of personal data. If you wish to exercise your rights of access, rectification, deletion, portability or opposition in relation to your personal data, you can do so through security@happyrobot.ai subject to the GDPR. For more information, visit https://www.happyrobot.ai/privacy-policy.