Senior DevEx Engineer - Remote Agent Tooling

Block; Chicago (IL); Hybrid; USD 218,000 - 327,000; Full time

Benefits offered by this job

Remote work

Medical insurance

Flexible time off

Retirement plans

Family planning benefits

Job summary

Block is seeking a Developer Experience Engineer to build tooling and agent workflows that empower humans and agents to modify our monorepos quickly and safely. You will own interfaces to observe, steer, and provide context to agents, and build guardrails to keep complexity in check as changes scale.

This high-leverage role multiplies across the engineering org, including work on frameworks upgrades, language migrations, and dependency health, while mentoring others in agent design and tooling.

Qualifications

• Shipping developer tooling at scale: shipped tools engineers use daily (CLIs, desktop integrations, config management).
• Scaling work with agents: built agent workflows that complete weeks of work.
• Evolving frameworks & large codebases: upgrading frameworks and leading migrations or large refactors.
• 10+ years for staff / 7+ for senior in large, complex codebases.

Responsibilities

• Build and ship tools engineers and their agents use daily (CLIs, desktop integrations, and interfaces).
• Design and evolve agentic loops and harnesses for reliable engineering work.
• Build agent workflows for large-scale changes with minimal disruption to product teams.
• Create guardrails, tests, and automation to keep agent changes safe to land.
• Mentor engineers on agent design, tooling, and codebase health.

Skills

Shipping tooling at scale

Agent workflows

Frameworks & codebases

Communication

Tools

OpenTelemetry

CI/CD

Harness engineering

Job description

Block is seeking a Developer Experience Engineer to build tooling and agent workflows that empower humans and agents to modify our monorepos quickly and safely. You will own interfaces to observe, steer, and provide context to agents, and build guardrails to keep complexity in check as changes scale.

This high-leverage role multiplies across the engineering org, including work on frameworks upgrades, language migrations, and dependency health, while mentoring others in agent design and tooling.