Make sure to read the full description below, and please apply immediately if you are confident you meet all the requirements. Senior Fullstack Engineer (Backend) Hybrid/Remote - has to be based in London Role Overview We’re looking for a Senior Full Stack (Backend) Engineer who thrives on building clean, scalable systems quickly. You’ll play a key role in shaping our backend architecture—from API design and data pipelines to job processing and observability. What You’ll Do Design and build robust backend systems Architect scalable infrastructure for job processing, analytics, and event tracking Build internal tooling for rate limiting, quotas, and authentication Design, develop, and maintain APIs and backend services Collaborate closely with product, design, and CX to deliver exceptional features Optimize for performance, security, and scalability Write clean, maintainable, efficient code Stay current with emerging technologies and apply them thoughtfully Qualifications Languages: Python, TypeScript Infrastructure: AWS (ECS, SQS, Parameter Store), Docker, GitHub Actions Data: Postgres, Redis Monitoring: LogFire, Sentry CI/CD: GitHub Actions About You 4+ years of experience building production-grade backend systems Skilled at writing clear, maintainable code with solid abstractions Confident designing databases, APIs, and infrastructure Experience with high-throughput systems or background job queues Strong sense of end-to-end ownership—code, infra, tests, monitoring are deeply about developer experience for your teammates Nice-to-Haves Experience with rate limiting, authentication systems, or quota tracking Familiarity with analytics & attribution engineering (e.g., dbt, Snowflake, event tracking) Experience building WYSIWYG editors Knowledge of PDF generation, render jobs, and image editing. xehkeey Experience with SSR frameworks (Next.js, Remix)