Backend Platform Software Engineer

About the role

Evolution is building a new platform from first principles, not maintaining mature systems. The system will operate across regions and process thousands of real-money transactions per second with strict consistency guarantees, so low latency, correctness, performance and security are design constraints from day one. The role sits close to the core: backend services, event-driven systems, databases and performance-critical product flows. It is a 100% on-site position based in Stockholm.

Key responsibilities

• Build backend services and platform components using Java and Spring Boot
• Design and implement APIs, data models, internal tools and product-facing systems
• Work with Kafka-based event-driven architecture and high-throughput transaction flows
• Build systems using PostgreSQL, where performance, correctness and observability matter
• Build services designed to run in a modern containerised environment
• Contribute to technical decisions on consistency, latency, scalability, reliability and security
• Write clear, maintainable, well-tested code and take part in code reviews and system design discussions

Required profile

• Strong computer science fundamentals and comfort with backend systems and databases
• Able to reason clearly about correctness, concurrency, performance and system design
• Interest in distributed systems, event-driven architecture and production-grade engineering
• Quick learner, ambitious and self-driven, wanting to grow in a small team with direct technical feedback
• Experience building systems where performance, correctness, reliability or security mattered

Required skills

• Java and Spring Boot
• Kafka or other event-streaming / message-driven systems
• PostgreSQL or relational database design
• Docker or containerised development workflows
• Internship experience or a few years of software engineering experience in a technically demanding environment
• Strong academic results from a rigorous technical university or program, and personal, open-source, academic or professional projects showing technical depth

What we offer

• Competitive pension, health and medical insurance
• 30 paid vacation days
• Fitness benefit (Friskvårdsbidrag)
• Professional growth, sport activities, parties and team building