Product Engineer at Cosine (W23) $70K - $90K Fully Agentic SWE London, England, GB Full-time US citizen/visa only 3+ years About Cosine Cosine is a fully agentic SWE that allows you to instantly work on every single ticket at once, asynchronously. About the role Join Our Team At Cosine, we're pioneering the integration of human reasoning into artificial intelligence. As a member of our team, you'll be at the forefront of cutting-edge technology, working to shape the future of AI with our groundbreaking synthetic data generation and RFT techniques. Why Work With Us? • Be part of a trailblazing company leading innovation in AI. • Work alongside a dedicated team of experts passionate about AI and technology. • Engage in challenging and rewarding work that makes a real impact on the advancement of AI. Responsibilities On this team you will build end-user products (developer workflow tools) that use Cosine's LLM and AI tech in order to augment developers’ capabilities for our users. We're building tools for ourselves. We are our own customer as engineers so you should be obsessed about the developer experience. Skills & Experience Experience building reactive applications (React, Vue, Rails, etc) that work across multiple platforms and that are highly interactive Experience with NextJS and typescript Comfortable with back-end development Design back-end APIs Expose and use rest endpoints Experience with developer experience tools Worked on CI/CD pipelines Worked with containerization Experience with testing code Unit testing Integration testing Test performance optimization Programming languages Experience in either React, Vue, Typescript (we're open to people from other languages) Knowledge of Node.js, Python or Go is a plus Other relevant tools/experience DevOps: Git, AWS, Docker, PNPM, GitHub Actions Monitoring and alerting (Grafana, Axiom) Experience with feature flagging mechanisms (Posthog) Requirements • Minimum of 4 years of professional experience in software engineering. (Looking for mid to senior level candidates) • Proven expertise and expertise in the programming language of your choice. • Familiarity with AI technologies such as OpenAI, ChatGPT, Anthropic, ASTs, Github, Knowledge Graphs, Retrieval Augmented Generation, and Fine Tuning. • Strong problem-solving skills and the ability to work e]ectively in a collaborative team environment. • Excellent communication and interpersonal skills.