Are you passionate about creating innovation? Do you enjoy developing groundbreaking digital products that utilize cutting-edge technologies? Are you excited about driving growth in digital wealth management and delivering a unique customer experience? If so, we would love to hear from you!

We are Whitebox, and we believe investing can be fun, simple, and low-risk. Whitebox has started to make digital wealth management accessible to everyone and tailored to individual needs while keeping asset management simple, transparent, and inexpensive.

We build the systems that move real money in real markets and we need a sharp QA mind to keep them bulletproof. You'll be the quality backbone of our trading platform: not just writing automation, but thinking like a tester who knows where things actually break. Our Ruby on Rails framework is solid — we need you to evolve it with smart features and AI-powered tooling that help us ship faster without cutting corners.

At Whitebox, you're not chasing tickets, but protecting a live trading platform where bugs cost real money. You'll work with modern tooling, smart engineers, and get to shape how QA scales across a polyglot, high-stakes system.

If you love hunting edge cases, breaking things on purpose, and asking "but what if…" until engineers sigh, you'll fit right in.

• Own and evolve our Ruby on Rails automation framework
• Build out test coverage for backend APIs and trading engines in Java (and Rust, as we grow)
• Drive BDD/TDD practices using RSpec, JUnit and similar tools (no Cucumber here)
• Bake security and compliance checks into the testing lifecycle

• Use AI tools pragmatically to expand coverage and surface failure modes with a tester's skepticism, not blind trust
• Partner closely with backend engineers in a shift-left culture

• The QA mindset: You instinctively look for what could go wrong, question assumptions, and design tests that expose real risk, not just hit coverage numbers.
• Strong coding chops: Confident in Ruby (to work in our framework) and Java (to extend it). You write tests like production code.
• BDD/TDD fluency: You know how to bridge business intent and technical rigor without Gherkin scaffolding.
• Distributed systems sense: You understand and have some experience on how data consistency, timing, and concurrency fail in the wild.

• Fintech instincts: You understand trade lifecycles, brokerage flows, and how robo-trading works.
• Remote-ready: Clear communicator, self-driven, thrives in async Agile teams.
• Continuous delivery: You have experience of working with CI/CD pipeline integration and know the peculiarities of continueos delivery

• Performance/load testing
• Kubernetes/Docker
• familiar with OWASP and testing for vulnerabilities in financial systems.

• This position is a permanent, full-time (40h/wk) role.
• Thirty days of paid vacation.
• 100% remote.

• Attractive remuneration package and free choice of hardware.
• Weekly manager one-on-ones, flat hierarchies, and an open-door mentality.

Please send us your CV together with your earliest starting date and salary expectations to jobs@whitebox.eu.

Your contact person is Eneko Taberna.