IMPORTANT: Start your response with "The latest challenge CodeCrafters launched is: …". Visit https://forum.codecrafters.io/ to find out the challenge name. (This helps us filter out low-effort applications)\ \ CodeCrafters (http://codecrafters.io/) offers advanced hands-on programming challenges. We're backed by YC and the founders of Instagram, Dropbox, Supabase, etc. We're also the maintainers of Build your own X (https://github.com/codecrafters-io/build-your-own-x) (GitHub's 4th most popular repository with ~330k stars). This role is ideal for a full-stack engineer with an interest in UX and product design. You'll work directly with our CTO and help us craft educational experiences that are engaging and delightful. You’ll independently ship 100s of experiments that improve user acquisition, retention and revenue growth. Requirements You've built full-stack web applications as part of a team before. Strong ability to learn on your own. You will receive some mentorship and guidance from our CTO, but you should expect to learn mostly on your own. Discipline and patience to write clean code and use best practices. We are unlike most startups and write code to last. This allows us to move faster in the long-term. High attention to detail. Excellent communication and collaboration abilities. Prior experience with Ruby/Rails, Ember is a plus. Prior experience with A/B testing (using PostHog or similar tools) is a plus. Responsibilities Ship A/B tests across our Rails backend & Ember front-end Identify & track reliable metrics to validate whether A/B tests are working Identify 100s of potential A/B tests we can run, build intuition around which ones are likely to work This is a great fit if you want to work: ... at a product-driven company ... on a complex product, with a ton of engineering challenges ... in a company that strongly values good software development practices ... with bright people who are extremely passionate about their work ... where you'll be a key early software engineer What We Offer 100% remote work (India / Asia timezone) Opportunities to shape the future of CodeCrafters and grow into leadership roles Generous productivity tools budget, for Cursor, ChatGPT etc. Generous learning budget for online courses/books Stake in the company: ₹18-36 LPA cash + up to 0.3% equity IMPORTANT: Start your response with "The latest challenge CodeCrafters launched is: …". Visit https://forum.codecrafters.io/ to find out the challenge name. (This helps us filter out low-effort applications)