Fullstack Engineer, Growth

**About the company:** Metanomaly Tokyo Metanomaly is behind PixAI, a character generation engine that enables users to generate virtual characters and avatars using generative AI. Read more **Responsibilities:** Build and own features across the stack, from database and API through to the interface users touch Design and implement the API endpoints new product surfaces depend on Implement frontend work coming from design, from small UI corrections through to full components and flows Ship experiments and instrumentation on activation, conversion, and engagement flows, and iterate on what the data says Work on generative AI product surfaces: prompt flows, generation pipelines, the places where model behavior meets UX Tech stack Frontend: React + TypeScript, Tailwind CSS Backend: Node.js + TypeScript, GraphQL, RPC, PostgreSQL Infrastructure: AWS, Docker Experimentation / Analytics: Amplitude, Snowflake Requirements 3–5+ years building and maintaining products used by real users Shipped both frontend features and backend services or APIs in production Able to design and implement well-structured API endpoints Strong enough on the frontend to implement a design faithfully and catch quality issues before users do Comfortable clarifying underspecified work yourself instead of waiting for a spec Honest estimation, and early flagging when something is blocked or bigger than it looked Basic SQL, enough to check that what you shipped did what you expected Professional experience with B2C / consumer-facing products English at business level Nice to haves While not specifically required, tell us if you have any of the following. Hands-on experience running A/B tests or similar product experiments Experience working closely with designers to implement UI Experience with growth work, product iteration, or independent app development Interest in anime, otaku culture, or creator communities Interest in AI generation If you’ve read this, please tell us your top 3 favorite anime at the end of your message. **Requirements:** 3–5+ years building and maintaining products used by real users Shipped both frontend features and backend services or APIs in production Able to design and implement well-structured API endpoints Strong enough on the frontend to implement a design faithfully and catch quality issues before users do Comfortable clarifying underspecified work yourself instead of waiting for a spec Honest estimation, and early flagging when something is blocked or bigger than it looked Basic SQL, enough to check that what you shipped did what you expected Professional experience with B2C / consumer-facing products English at business level **Nice to have:** While not specifically required, tell us if you have any of the following. Hands-on experience running A/B tests or similar product experiments Experience working closely with designers to implement UI Experience with growth work, product iteration, or independent app development Interest in anime, otaku culture, or creator communities Interest in AI generation If you’ve read this, please tell us your top 3 favorite anime at the end of your message.