Principal engineer

🚀 Staff Backend Engineer (Python/Django)📍 Barcelona (Hybrid) | Full-time | Fintech💶 €75,000 - 90,000Are you a hands-on backend engineer who loves building systems that scale?Do you enjoy owning architecture end-to-end while still writing production code every day?We’re partnering with a fast-growing, VC-backed fintech on a mission to improve people’s financial well-being. Since launching recently, they’ve already scaled to hundreds of thousands of users and processed over €1B in transactions — and they’re just getting started.💡 The RoleThis is a Staff-level, highly hands-on engineering role focused on designing, building, and scaling backend systems in a modern, event-driven environment.You’ll play a key role in shaping architecture, solving complex problems, and raising the technical bar across the team.🔧 What You’ll Be Doing- Designing and scaling backend systems using Python/Django- Owning architecture in a microservices + event-driven environment- Working closely with infrastructure and security teams (AWS)- Taking systems from design → production → scale- Leveraging AI tools to improve development speed and quality- Mentoring engineers and contributing to engineering excellence🧰 Tech StackPython, Django, AWS, Docker, Kafka, PostgreSQL, Redis, MondoDB and Datadog✅ What We’re Looking For- 10+ years of backend engineering experience- Strong expertise in Python & Django- Proven track record scaling systems in startups or scale-ups- Experience with AWS and containerized environments- Deep understanding of PostgreSQL and performance optimisation- Ability to debug complex production issues- Focus on performance, reliability, and cost-efficiency- Strong communication skills (English)- Pragmatic, humble, and impact-driven mindset🎁 What’s On Offer- Competitive salary- Health insurance + meal allowance- Hybrid working (2 days remote/week)- High-ownership, low-ego environment- A meaningful mission with real-world impact💬 If you’re excited about building scalable systems in a fast-moving fintech and want to stay close to the code while influencing architecture, we’d love to hear from you.👉 Apply or message me directly to learn more.