Senior DevEx Engineer: Build Tools for Autonomous Agents

Block; United States; Remote; USD 218,000 - 327,000; Full time

Benefits offered by this job

Remote work

Medical insurance

Flexible time off

Retirement savings plans

Family planning support

Job summary

Block is seeking a Developer Experience Engineer to build tooling and agent workflows that empower humans and agents to scale changes across our massive monorepos. You will own interfaces engineers use to observe, steer, and provide context to agents working on code, and you will implement guardrails to keep complexity in check as changes grow in scope.

This is a high-leverage role; large-scale framework upgrades, language migrations, and dependency health will be tackled through agent-driven

Qualifications

• Shipping developer tooling at scale and driving adoption, debugging, and supporting users.
• Scaling work with agent workflows that finish tasks quickly.
• Leading migrations or large refactors from planning through rollout in frameworks and codebases.
• 10+ years of experience in large, complex codebases (Staff) or 7+ years (Senior).
• Strong communication skills and ability to build trust by owning outcomes.

Responsibilities

• Build and ship tools for engineers and their agents (CLIs, desktop integrations, interfaces) and own adoption, distribution, and support.
• Design and evolve agentic loops and the harnesses, skills, and context for reliable agent work.
• Build agent workflows that drive large-scale changes with minimal disruption to product teams.
• Create guardrails, tests, and automation to make large agent-authored changes safe to land and monitor complexity.
• Identify and fix friction in the development workflow for humans and agents.
• Collaborate with internal and external builders to understand pain points and measure adoption and impact.
• Set technical direction and mentor engineers on agent design, tooling, and codebase health.

Skills

Shipping tooling at scale

Agent workflows

Frameworks & large codebases

10+ years in large codebases (Staff) /

Strong communication

Job description

Block is seeking a Developer Experience Engineer to build tooling and agent workflows that empower humans and agents to scale changes across our massive monorepos. You will own interfaces engineers use to observe, steer, and provide context to agents working on code, and you will implement guardrails to keep complexity in check as changes grow in scope.

This is a high-leverage role; large-scale framework upgrades, language migrations, and dependency health will be tackled through agent-driven