Senior Backend Engineer in Barcelona

🌟 Senior Backend Engineer @ Dolfin — Build the Future of Sales Compensation 💰

Location: Barcelona 🇪🇸
Hybrid mode (minimum 2 days onsite)
Type: Full-time

About Dolfin

Dolfin is redefining how companies understand, design, and optimize their sales compensation strategies. Our platform helps organizations see how compensation drives behavior and revenue — and empowers sales teams with clarity, confidence, and motivation.

We're a small, fast-moving team 🚀 with huge ambitions. If you love building real products, shipping fast, owning big pieces of the stack, and seeing your work directly impact customers… you'll love it here. ❤️

The Role

We're looking for a hands-on Senior Backend Engineer who is obsessed with building great software. Someone who thrives in startup environments, loves solving hard problems 🧠, and takes pride in writing clean, scalable, reliable code.

You'll work across multiple parts of the platform, influence core architecture decisions 🏗️, and collaborate closely with product and founders. Your work will shape how thousands of salespeople understand their performance and compensation.

What You'll Do

• Design, build, and maintain backend services that power Dolfin's compensation engine ⚙️

• Own complex features end-to-end, from architecture to delivery 🛣️

• Work with large datasets 💾 and optimize performance-critical queries

• Collaborate with product, frontend, and data to shape roadmap and execution 🤝

• Improve the reliability, scalability, and observability of our systems 📈

• Contribute to a strong engineering culture built on ownership, clarity, and craftsmanship ✨

Who You Are

• A builder at heart — you love coding, shipping, iterating, and seeing real users benefit from your work 💻

• Deeply hands-on: this is not a managerial role; you will spend most of your time writing and reviewing code

• Startup-minded: you thrive in dynamic environments and want your work to have direct, visible impact 💥

• Team player with strong communication skills and zero ego 🧘

• You care about quality and readability, not just getting things to "work"

• Motivated by meaningful problem spaces (data, incentives, revenue optimization, behavioral analytics) 📊

Required Skills

• Strong experience building and maintaining backend systems

• Excellent SQL skills — query design, optimization, data modeling 🔍

• Solid understanding of backend architecture, APIs, services, and scaling

• Comfortable working autonomously and making technical decisions 🧭

Required Education

• Bachelor's degree in Computer Science, Software Engineering, or a related field, OR equivalent practical experience demonstrating strong CS fundamentals (data structures, algorithms, distributed systems, architecture, etc.)

We care about your ability to think, build, and solve problems — not where you learned it. 💡

Nice to Have

• Experience with TypeScript, Node.js, or serverless architectures

• Familiarity with compensation, financial systems, or analytics platforms

• Experience with Supabase, PostgreSQL, or distributed systems ☁️

Why You'll Love Working at Dolfin

• Huge ownership and ability to influence the product and technical roadmap 🗺️

• Zero bureaucracy — we move fast and trust our team

• Work directly with founders on a product used by revenue teams every day

• A culture built around passion, craftsmanship, and continuous learning 🌱

• Opportunity to shape the foundation of a fast-growing company 🏗️