Senior Software Engineer - Full-Stack
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
- 5+ years of professional experience
- 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: 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.
- Craftsmanship: Put care and intention into every task, strive for excellence, and take deep ownership of the quality and outcome of your work. Details compound. Treat every task as a reflection of our standards.
- Majo: Be friendly & have fun with your coworkers. Always be genuine & honest, but kind. Be approachable, helpful, and warm. Enjoy the ride together.
- Urgency with Focus: Create the highest impact in the shortest amount of time. Move fast, but in the right direction. Prioritize ruthlessly, act decisively, and stay aligned. Aim for high leverage: the biggest results from the simplest, smartest actions.
- First-Principles Thinking: Strip a problem to physics-level facts, ignore industry dogma, rebuild the solution from scratch. Don’t copy-paste solutions. Rebuild from the ground up if needed.
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.