Software Engineer - Full Stack

About HappyRobot

HappyRobot is the AI-native operating system for the real economy—a system that closes the circuit between intelligence and action. By combining real-time truth, specialized AI workers, and an orchestrating intelligence, we help enterprises run complex, mission-critical operations with true autonomy. Our AI OS compounds knowledge, optimizes at every level, and evolves over time. We’re starting with supply chain and industrial-scale operations, where resilience, speed, and continuous improvement matter most—freeing humans to focus on strategy, creativity, and other high-value tasks. You can learn more about our vision in our Manifesto.

HappyRobot has raised $62M to date, including our most recent $44M Series B in September 2025. Our investors include Y Combinator (YC), Andreessen Horowitz (a16z), and Base10—partners who believe in our mission to redefine how enterprises operate.

About The Role

At HappyRobot, Full Stack Engineers 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

• Strong generalist — you’re excellent on either the front end or back end, and comfortable working across the stack
• Front-end expertise with TypeScript and Next.js, including performance, UX, and clean architecture
• Back-end experience with Go, building reliable, scalable systems
• Product-minded engineer who understands tradeoffs between speed, quality, and scale

What You’ll Do

• Build and own entire sections of the product, including major parts of the web application
• Design, implement, and ship features end-to-end — from UI to APIs to infrastructure
• Help optimize and scale our voice AI infrastructure, improving latency, reliability, and cost
• Collaborate closely with founders and teammates to shape product direction
• Ship to production frequently and iterate based on real user feedback

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
• Urgency with Focus
• Talent Density and Meritocracy
• First-Principles Thinking