Senior Backend Engineer (Platform and API)

Practical experience designing, implementing, and maintaining public APIs, plug-in ecosystems, or extensibility platforms. Deep experience with Node.js, TypeScript, GraphQL, and MongoDB. Led backend projects from start to finish, shaping architecture and delivering reliable systems. Strong systems thinking to anticipate downstream effects and design long-term architecture. Worked across teams to drive platform or infrastructure improvements. Contributed to collaborative or multi-user product features. Fluent with modern AI tools for debugging, documentation, and exploration. Care about performance, scale, and clean abstractions, and know how to measure and improve them pragmatically. Influenced engineering culture through code reviews, mentoring, or leading by example. Personal stake in content creation and experience using Buffer. Thrive in remote, async environments, being clear and generous with context. Likely 7+ years of experience, with depth and impact being more important than a specific number.

Lead the development of backend systems for the Buffer Platform, including creating an API for core features, internal services, and developer tools. Improve and evolve internal systems by consolidating services, enhancing tooling and observability, and reducing complexity. Collaborate with engineers, product, and design to scope work and find simple solutions. Make steady improvements to performance, reliability, and data modeling. Participate in on-call rotation and day-to-day maintenance work, including bug fixing and incident follow-ups. Contribute to shaping engineering culture through knowledge sharing, code reviews, and leading by example.