Senior Software Engineer, Developer Experience

Block

. Build and ship tools engineers and their agents use daily, including CLIs, desktop integrations, and interfaces for observing, unblocking, and steering autonomous agents .

Posted 11/4/2026full-timeRemote • California • United StatesSenior💰 $217,800 - $326,800 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and shipping developer tooling at scale, including CLIs and desktop integrations, while effectively managing agent workflows and ensuring codebase health. Strong ability to mentor engineers and set technical direction in complex environments.

Highest-signal resume keywords

Developer Tooling At ScaleAgent Workflows DevelopmentAgentic Loops UnderstandingLarge Codebase ExperienceStrong Communication Skills

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

CLIsDesktop IntegrationsConfiguration ManagementAgent WorkflowsTool UseContext ManagementVerificationFailure HandlingFramework UpgradingCodebase Refactoring

Soft Skills

Strong Communication SkillsTrust Building

Tools & Technologies

OpenTelemetryCI/CDTest Infrastructure

Industry Keywords

Developer Productivity MetricsInternal Tools DistributionAgent ObservabilityHarness EngineeringContext Engineering

Tech Stack

Tools & technologies

Open Source

About the role

Key responsibilities & impact

Build and ship tools engineers and their agents use daily, including CLIs, desktop integrations, and interfaces for observing, unblocking, and steering autonomous agents
Own tool adoption, distribution, and support
Design and evolve agentic loops, harnesses, skills, and context for reliable engineering work
Build agent workflows for framework upgrades, language migrations, and dependency updates
Build guardrails, tests, and automation for safe agent-authored changes
Track leading indicators of growing codebase complexity
Identify and fix root causes of development workflow friction for humans and agents
Partner with builders inside and outside engineering to understand pain points and measure adoption and impact
Set technical direction and mentor engineers on agent design, tooling, and codebase health

Requirements

What you’ll need

Shipped developer tooling at scale, such as CLIs, desktop integrations, configuration management, or internal platforms
Built agent workflows that completed work normally taking a team weeks
Deep understanding of agentic loops, including tool use, context management, verification, and failure handling
Deep experience with application or platform frameworks, including upgrading and managing their evolution
Track record leading migrations or large refactors from planning through rollout
Significant experience working in large, complex codebases: typically 10+ years for Staff or 7+ years for Senior
Strong communication skills and ability to build trust by owning work outcomes
Experience with harness engineering or context engineering is nice to have
Experience with agent observability, such as OpenTelemetry, is nice to have
Experience distributing internal tools and measuring adoption is nice to have
Background in developer productivity metrics, test infrastructure, or CI/CD is nice to have
Open source contributions to developer tooling or agent frameworks are nice to have

Benefits

Comp & perks

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