Senior Software Engineer, Developer Experience

Block

Confirmed live yesterday High trust

Quick summary

Work type: On-site
Location: San Francisco, CA
Salary: $217,800–$326,800 / yr
Posted: 1 day ago
Freshness: Confirmed live yesterday
Nearby: 99+ roles within 25 mi

Market check

Salary context

Above market

How this pay compares to similar roles

Similar $160k

This role $272k

$95k $352k

below market most similar roles pay here above market

This role pays more than 99% of similar roles. Most pay $142,400–$177,250 — the blue band above. At the midpoint, this role pays about $272k versus about $160k for comparable roles.

Based on 240 similar postings.

Employer

About Block

Block, Inc. (formerly Square) is a financial technology company operating the Square merchant payments ecosystem, Cash App peer-to-peer payments, TIDAL music streaming, and Bitcoin-focused financial services. Industry: Financial Technology & Payments

Block currently has 40 open roles on FindRole.

Listed pay typically runs $217,800–$326,800 across 39 roles with salary data.

Most-posted roles

View all roles at Block

At a glance

TL;DR · Senior Software Engineer, Developer Experience

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JOB TITLE: Careers - Senior Software Engineer, Developer Experience As a Senior Software Engineer, Developer Experience, you will join the team responsible for building the tooling and agent workflows that enable humans and autonomous agents to modify large monorepos safely and quickly. You will own the interfaces for observing and steering agents, design agentic loops including plan, act, verify, and iterate cycles, and build guardrails to manage complexity. Your daily work involves shipping CLIs, desktop integrations, and automation for large-scale framework upgrades, language migrations, and dependency health. You must possess experience in shipping developer tooling at scale, scaling work with agents, and evolving large codebases. Key competencies include harness engineering, agent observability via OpenTelemetry, and managing internal tool distribution through versioning, release channels, and telemetry.

What does a Software Engineer earn in California?

Median $214500 from 1134 postings across 74 companies.

See salary data

Skills

Developer Tooling CI/CD OpenTelemetry Configuration Management Test Infrastructure Internal Platforms Telemetry

What you'll do

Build and ship developer tools including CLIs, desktop integrations, and agent observation interfaces.
Design and evolve agentic loops, harnesses, and skills to enable reliable autonomous engineering work.
Build agent workflows to execute large-scale codebase changes like framework upgrades and migrations.
Develop guardrails, tests, and automation to ensure the safety of agent-authored code changes.
Identify and resolve root causes of friction within the development workflow for both humans and agents.
Set technical direction and mentor other engineers on agent design and codebase health.
Measure the adoption and impact of shipped tools through telemetry and user feedback.

What we're looking for

Experience shipping developer tooling at scale, including CLIs, desktop integrations, configuration management, or internal platforms.
Experience building agent workflows to complete large-scale work, including agentic loops, tool use, and context management.
Deep experience with application or platform frameworks, including leading migrations and large refactors.
Significant experience working in large, complex codebases (typically 10+ years for Staff, 7+ for Senior).
Strong communication skills and the ability to build trust with teams by owning work outcomes.
Experience with harness engineering or context engineering (preferred).
Experience with agent observability, such as through OpenTelemetry (preferred).
Experience distributing internal tools and measuring adoption with telemetry or surveys (preferred).

Senior Software Engineer

Mastercard

O'Fallon, MO 1 day ago $115,000–$184,000

C C++ Linux Python Shell Scripting TCL Perl Dynatrace Splunk Agile Performance Engineering

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