(Senior) Product Engineer– Ruby/Rails (F/M/X), Brussels

Job Description

We are hiring a Senior Backend Engineer to build scalable, user‑centric software for digital entrepreneurs in the DACH region and beyond. Responsibilities

Own features end‑to‑end: from understanding the problem to shipping the solution and making sure it actually works for users. Design, build, and maintain high‑quality Ruby code using best practices. Build back‑end components for web applications and integrate AI‑powered capabilities where they create real value.Collaborate with designers, product managers, and other engineers to figure out what to build and why. Work on technical feasibility assessments, architecture decisions, and process improvements. Test for performance, responsiveness, and security. Stay curious about new technologies and push for their adoption when it makes sense.Who We’re Looking For

Enthusiastic drivers.

You fully own your projects and get them done. You know when to ask for help. Optimistic problem solvers.

Things get hard sometimes: scaling, complex product work, edge cases. You’ll collaborate, iterate, and ship your way through it. Grown ups.

We value low‑ego, flexible, respectful teamwork. Genuine builders.

You love building software and would still be doing it without a paycheck. Requirements

4+ years of commercial experience with Ruby on Rails. Solid understanding of object‑oriented programming and scalable application design. Deep experience with Git. An eye for clean code and a habit of writing it. Strong problem‑solving skills and comfort with ambiguity. Understanding of agile software development.Location: Berlin hybrid or EU remote. Nice to Have

Experience with test‑driven development. Familiarity with CI/CD (CircleCI, GitHub Actions). Hands‑on experience with PostgreSQL and NoSQL databases. Experience building high‑load systems. Background in FinTech or e‑commerce. Familiarity with prompt engineering, AI workflow tools, LLMs, vector databases, orbuilding AI agents.Benefits

Personal training&development budget of€1,500 per year. Responsibility and trust from day 1. Individual coaching and further training to support your development. Free BVG ticket. Employee discounts at numerous companies. Pension program with company match up to 30% of employee contributions. Culture of equity and inclusion whereyou are appreciated for the person you are.Equal Opportunity Statement

We are an equal‑opportunity employer committed to diversity and inclusion. Discrimination based on race, religion, color, national origin, gender identity or expression, sexual orientation, age, marital status, disability status, or any other aspect that makes you unique is not tolerated.

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