Staff Rails Engineer - Engineering

We're looking for a Staff Backend Engineer to own and scale theRuby on Rails layer of our AI-native data platform.You'll be responsible for the core B2B SaaS experience: dashboards,APIs, auth, permissions, and the product surface that both humansand AI agents rely on every day.

Requirements

7+ years of backend engineering experience , with deep experience in Ruby on Rails

Strong track record building B2B SaaS products with complex dashboards and workflows

Deep understanding of PostgreSQL (schema design, migrations, performance, data integrity)

Hands-on experience designing and operating APIs at scale

Solid knowledge of authentication & authorization systems (OAuth, SSO, permissions)

Strong grasp of system design , API boundaries, and long-term architectural trade-offs

Product-minded, autonomous, and comfortable operating with high ownership and ambiguity

Experience with multi-tenant SaaS architectures

Built or maintained design-system-backed dashboards used by technical and non-technical users

Familiarity with event-driven systems and background job processing (Sidekiq, Faktory, etc.)

Experience working closely with frontend teams (React, GraphQL clients)

Exposure to AI-powered features or systems used by automated agents

Responsibilities

Own the Rails backend powering our B2B SaaS product and internal APIs

Design and evolve a clean, expressive GraphQL API used by both the web app and AI agents

Build robust systems for auth, permissions, organizations, billing, and environments

Partner with frontend engineers to deliver high-quality dashboards and workflows

Ensure correctness, performance, and maintainability of our Postgres data models

Make architectural decisions that balance product velocity and long-term scalability

Shape engineering culture, raise the bar on code quality, and mentor others

Act as a technical owner for large product areas, from conception to production

Apply for Staff Rails Engineer

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Hybrid Remote Work

Work from home and in our beautiful Paris office.

Equity

Incentivized for long-term success.

Time Off

30+ days of paid vacation a year.

5,000€ budget for MacBook Pro (or equivalent) and accessories.

Transportation Reimbursement

50% of your commute costs covered.

Daily meal vouchers to enjoy lunch.

Health Insurance

All-in-one health insurance through Alan.

Learning & Development

Sustainability

Incentives for eco-friendly commuting and sustainable practices.

Funding Announcement

We're excited to announce our latest funding round with leading investors supporting our mission.

The stack is broken: slow, fragmented, reactive. Our manifesto is a call to wake it up. It's time for data that works like your best teammate: always on, always thinking, always ready to help.