Staff Software Engineer

You'll own major parts of the platform that thousands of engineers rely on every day to
ship code faster. We process millions of CI events, and you'll be inside the systems
that make that work.
You'll partner directly with our CTO on the technical direction. The features you ship
are ones you'll also use yourself.
Mergify is small, fully remote, profitable, and bootstrapped, based in France. No VC
pressure, no growth-at-all-costs targets. A product that works, with plenty left to
build.
This is a French CDI, so you need to already have the right to work in France. We don't
sponsor visas.
The role
You'll be the senior technical backbone of our product engineering team. That means:

Owning big problems end to end. From design to production. No hand-offs, no waiting for specs.
Building core platform features. Test orchestration and event-driven systems processing millions of events.
Shaping technical direction with our CTO. Architecture decisions and system-level tradeoffs land on your desk.
Shipping fast, learning faster. Short cycles inspired by Shape Up, full autonomy over your projects.
Working on systems people depend on. Our backend is Python and PostgreSQL, running in production for thousands of teams.

This is a builder role with real impact. Your decisions stick and your work shows up in production every day.

What you'd actually work on
A few examples from the past year, and what's coming up:

Push the event processing engine to the next throughput target.
Design a new test quarantine feature from the ground up.
Add support for a new test framework integration.
Rewrite the core of the merge queue system for performance and scale.

What we're looking for
Senior at Mergify means roughly 8+ years in production engineering. You can take a
problem from idea to deploy without supervision, and you own a system end to end,
including how it behaves in production long after you've shipped it.
We build with AI every day, and the thing we care about most is that you already do too.

You're AI-native. You build with agentic coding tools (Claude Code, Cursor, whatever fits), and you have real judgment about where they help and where they get in the way. Your workflow has changed over the last two years, and you can tell us how.
Deep production experience in whatever stack you've run at scale. With agents writing much of the code, the language on your CV matters less than knowing how systems behave under load, how they fail, and spotting what's wrong in a diff you didn't type.
You've built and scaled things. Real systems running in production at scale.
You think in tradeoffs. Speed vs craft, done vs perfect. You know when to push and when to ship.
You communicate clearly. Complex ideas, simple words. Writing is how decisions get made here, because we're async-first.
You own outcomes. If something's broken, you fix it. If something's unclear, you clarify it.
You've done remote work before, and done it well. We're not here to teach you how to work autonomously.

Bonus: you've worked on developer tools or CI/CD systems. You get the users because you are one.
A day at Mergify
We're fully remote, so Slack, Linear, GitHub, and video calls are how we work together.
We chat through the day, and we meet up in person every quarter.
We use Mergify to run our own CI, which means every feature you ship you'll use the
next day. We follow agile principles loosely: a weekly planning meeting and a
Shape-Up-inspired kanban board, with a daily standup to keep everyone in sync. Every
engineer owns one or more projects with full autonomy, from design through production.
Why here

Features you actually use, because we use Mergify internally too.
A product engineers love and rely on daily.
A small, senior team with high trust and minimal overhead.
A bootstrapped startup that grows every year.
Pay that reflects your level. We get into specifics during the interview.
The French basics done right, plus stock options. Full list on the careers page.
Flexible working hours.