Senior Software Engineer, Developer Experience

Block is one company built from many blocks, all united by the same purpose of economic empowerment.

As a Developer Experience Engineer, you'll build the tooling and agent workflows that let humans and agents change large monorepos quickly and safely.

Responsibilities

• Build and ship the tools engineers and their agents use every day, such as CLIs, desktop integrations, and interfaces for observing, unblocking, and steering autonomous agents, and own their adoption, distribution, and support
• Design and evolve agentic loops and the harnesses, skills, and context that let agents do real engineering work reliably
• Build agent workflows that drive large-scale changes across the codebase, including framework upgrades, language migrations, and dependency updates, with minimal disruption to product teams
• Build the guardrails, tests, and automation that make large, agent-authored changes safe to land, and track the leading indicators of growing complexity
• Find friction in the development workflow for both humans and agents, and fix the root causes
• Partner with builders inside and outside of engineering to understand their pain points, and measure the adoption and impact of what you ship
• Set technical direction and mentor other engineers on agent design, tooling, and codebase health

Requirements

• Shipping developer tooling at scale: You've shipped tools that engineers use daily, such as CLIs, desktop integrations, configuration management, or internal platforms.
• Scaling work with agents: You've built agent workflows that finished work that would normally take a team weeks.
• Evolving frameworks and large codebases: You have deep experience with application or platform frameworks, including upgrading them and managing their evolution over time.
• Significant experience working in large, complex codebases
• Strong communication skills and the ability to build trust with teams by owning the outcomes of your work

Nice to Have

• Experience with harness engineering or context engineering
• Experience with agent observability
• Experience distributing internal tools and measuring adoption with telemetry or surveys
• Background in developer productivity metrics, test infrastructure, or CI/CD
• A passion for intuitive user experience and good taste in elegant solutions
• Open source contributions to developer tooling or agent frameworks

Salary

The salary range for this position varies based on location. The ranges are as follows: Zone A: $217,800-$326,800 USD Zone B: $207,000-$310,400 USD Zone C: $196,100-$294,100 USD Zone D: $185,200-$277,800 USD