Senior Full Stack Engineer, Growth (Spain)

• Drive measurable Business and User outcomes by delivering experiments and features
• Identify, design, build and launch experiments across the growth funnel — from onboarding to engagement mechanics to monetization opportunities.
• Design, implement, and evaluate A/B tests to optimize user flows and maximize key KPIs.
• Move fast, iterate often, and always tie your work back to impact.

Key Skills:

• Growth & Builder mentality — You’ll do what it takes to ship, test, learn, and scale.
• 5+ years of experience building production-grade web applications (React, Node.js, TypeScript, etc.).
• Strong A/B testing skills — you know how to design, run, and analyze experiments the right way.
• Experience working in high-scale systems and familiarity with modern web architectures.
• Obsession with outcomes over outputs — you care more about impact than perfect code.
• Curious, fast-moving, and comfortable with ambiguity and change.
• Comfortable balancing speed, quality, and pragmatism in high-impact environments.
• Product-driven mindset — you think in terms of user experience, not just features.