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Product Engineer

Cosine· Engineering
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Hybrid (London, England, GB)$70k - $90kfull-timePosted 11mo ago

About the role

Build end-user products (developer workflow tools) that leverage Cosine's AI tech to enhance developer capabilities, focusing on developer experience.

Responsibilities

  • Build end-user products (developer workflow tools) that use Cosine's LLM and AI tech to augment developers’ capabilities.
  • Obsessed about the developer experience.

Qualifications

  • Experience building reactive applications (React, Vue, Rails, etc) that work across multiple platforms and 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, performance optimization.
  • Experience in React, Vue, Typescript (or other programming languages).
  • Knowledge of Node.js, Python or Go is a plus.
  • Experience with Git, AWS, Docker, PNPM, GitHub Actions.
  • Familiarity with monitoring and alerting tools like Grafana, Axiom.
  • Experience with feature flagging mechanisms like Posthog.

Skills

Required:ReactNextJS and TypeScriptBack-end DevelopmentAPI DesignTesting CodeProgramming LanguagesDevOps Tools
Nice to have:CI/CD PipelinesContainerizationNode.js, Python, GoMonitoring and AlertingFeature Flagging
Last updated Mar 18, 2026. Interested? Apply on the company site.
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About Cosine

Fully Agentic SWE

Cosine is a fully agentic SWE that allows you to instantly work on every single ticket at once, asynchronously.

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