[Hiring] Senior Software Engineer, Developer Experience @Block

Role Description

Our engineers are only as effective as the tools, codebase, and workflows around them. As a Developer Experience Engineer, you’ll make our large, evolving codebase easier to build, change, and reason about, for both human developers and AI agents.

You will be responsible for the developer experience in our largest monorepos:

• Building tools for and driving framework and language migrations
• Keeping dependencies healthy
• Improving build and test infrastructure
• Shaping how agentic workflows operate in our development process

This is a high-leverage role. Every improvement you ship multiplies across the whole engineering organization.

Qualifications

• Significant experience (typically 7+ years for Senior, 10+ for Staff) working in large, complex codebases
• Deep experience with application or platform frameworks, including upgrading them and managing their evolution over time
• 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 handling) and a genuine willingness to keep investing in and evolving them as the field changes
• Strong communication skills and the ability to build trust with teams whose code you’re changing

Requirements

• Hands-on experience with Bazel or similar build systems (Buck, Pants, Nx, Gradle, etc.)
• Experience with codemods, AST-based tooling, or automated refactoring at scale
• Background in CI/CD, test infrastructure, or developer productivity metrics
• Experience building or integrating LLM-based coding tools into engineering workflows
• Open source contributions to build tools, frameworks, or developer tooling

Benefits

• Remote work
• Medical insurance
• Flexible time off
• Retirement savings plans
• Modern family planning

Company Description

Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people.

• Square makes commerce and financial services accessible to sellers.
• Cash App is the easy way to spend, send, and store money.
• Afterpay is transforming the way customers manage their spending over time.
• TIDAL is a music platform that empowers artists to thrive as entrepreneurs.
• Bitkey is a simple self-custody wallet built for bitcoin.
• Proto is a suite of bitcoin mining products and services.

Together, we’re helping build a financial system that is open to everyone.