Senior Software Engineer, Developer Experience

📋 Description Lead and execute large-scale changes across the codebase, including framework upgrades, language Design and evolve agentic loops: the plan, act, verify, and iterate cycles that let AI agents do Identify friction in the developer workflow (slow builds, flaky tests, confusing abstractions) and Improve build tooling and CI performance, including work with Bazel or a comparable build system Build the guardrails, tests, and automation that make large, automated changes safe to land Partner with product engineering teams to understand their pain points and measure the impact of 🎯 Requirements Significant experience (typically 7+ years for Senior, 10+ for Staff) working in large, complex Deep experience with application or platform frameworks, including upgrading them and managing Track record of leading migrations or large refactors, from planning through rollout Comfort navigating unfamiliar code quickly and making sound changes across many teams’ areas A solid understanding of agentic loops (tool use, context management, verification, failure Strong communication skills and the ability to build trust with teams whose code you’re changing 🎁 Benefits Remote work Medical insurance Flexible time off Retirement savings plans Modern family planning Other benefits at Block