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