Software Engineer, Product Simulations

Overview We are looking for software engineers to help build a gamified replica of the internet to train AI agents via reinforcement learning. Backed by $5M in seed funding from Index Ventures, AI Grant, and Naval Ravikant, they work with top LLM labs under contracts. Join a tiny but mighty team (under 5 people) making a massive impact on the future of AI. Responsibilities Build diverse, high-fidelity web apps based on spec Collaborate with agent trainers to integrate workflows Use AI tools to automate and speed up development Rapid iteration with a focus on function and realism over polish Job Requirements 1 years of frontend/full-stack experience Proficient in React and TypeScript Strong UI/UX intuition Experience with complex state management Experience with relational databases Strong portfolio or side projects Fluent in written and spoken English Responsive and comfortable working across time zones Highly active GitHub profile CS degree from a well-ranked institution is preferred for SWE roles Preferred Experience with AI agents and benchmark tools Seniority level Mid-Senior level Employment type Full-time Job function Engineering and Information Technology Industries Internet Publishing J-18808-Ljbffr

Location: São Paulo, São Paulo, BR

Posted Date: 9/18/2025