Senior Software Engineer – Backend Platform

Evolution Gaming Limited; Stockholms kommun; On-site; SEK 550,000 - 700,000; Full time

Job summary

Evolution Gaming Limited is seeking a talented backend engineer to build and evolve robust backend services and platform components primarily using Java and Spring Boot. Candidates should have experience with distributed systems and a strong understanding of data integrity and performance considerations.

The role involves designing APIs, transaction flows, and operating services in Kubernetes-based environments, requiring independent problem ownership and high technical standards.

Qualifications

• Strong computer science fundamentals.
• Substantial experience building reliable, observable, high-performance backend systems.
• Comfortable working with distributed systems, databases, and production services.
• Ability to reason about correctness, concurrency, failure modes, and system design.

Responsibilities

• Build and evolve backend services and platform components using Java and Spring Boot.
• Design APIs and data models, transaction flows, and internal tools.
• Drive technical decisions around consistency, scalability, and reliability.
• Own critical systems end-to-end, from design to production behaviour.

Skills

Java

Spring Boot

Kafka

PostgreSQL

Kubernetes

Job description

What You’ll Work With

• Java
• Spring Boot
• Kafka
• PostgreSQL
• Kubernetes

What You’ll Do

• Build and evolve backend services and platform components using Java and Spring Boot
• Design APIs, data models, transaction flows, internal tools, and product-facing systems
• Design and build Kafka-based event-driven services and high-throughput transaction flows
• Design event flows with careful attention to ordering, idempotency, retries, failure handling, and data consistency
• Build systems using PostgreSQL where performance, correctness, and data integrity matter
• Deploy and operate backend services in Kubernetes-based production environments
• Drive technical decisions around consistency, latency, scalability, reliability, and security
• Make informed trade-offs between correctness, performance, complexity, and long-term maintainability
• Identify bottlenecks and continuously improve throughput, latency, observability, and system quality
• Own critical systems end-to-end, from design and implementation to production behaviour
• Strengthen engineering quality through code reviews, design discussions, and knowledge sharing

Who You Are

• You have strong computer science fundamentals
• You have substantial experience building reliable, observable, high-performance backend systems
• You are comfortable working with distributed systems, databases, and production services
• You can reason clearly about correctness, concurrency, failure modes, performance, and system design
• You understand scalability beyond infrastructure alone, including data modelling, consistency, caching, and concurrency control
• You are comfortable making architectural decisions with long-term consequences
• You take ownership of problems and drive them to reliable outcomes
• You want to work in a small team with high standards and direct technical feedback

What Will Strengthen Your Application

• Strong professional experience with Java and Spring Boot
• Strong experience with Kafka or similar event-streaming/message-driven systems
• Experience designing event flows with careful attention to ordering, idempotency, retries, failure handling, and data consistency
• Strong understanding of PostgreSQL, relational database design, transactions, indexing, and query performance
• Strong experience deploying, operating, or troubleshooting backend services in Kubernetes-based production environments
• Experience designing backend systems for high-throughput, low-latency, business-critical workloads
• Experience with distributed systems design, especially around consistency, partitioning, concurrency, and failure handling
• Experience with transactional data modelling and correctness guarantees in financial, gaming, trading, payments, or other high-integrity domains
• Experience with production observability, including metrics, tracing, structured logging, alerting, and performance analysis
• Security-minded engineering, including authentication, authorisation, secrets handling, secure service communication, and defensive design
• Clear communication and the ability to discuss technical trade-offs thoughtfully

Bonus Experience

• Payments, fintech, gaming, trading, or other real-money transaction domains
• Multi-region system design with low-latency routing and strong data integrity guarantees
• Caching and data‑access strategies under strict correctness constraints
• Infrastructure as code and automated delivery pipelines
• Load testing, capacity planning, and performance regression prevention
• Incident response and production reliability ownership

This Role Is Likely Not for You If

• You prefer clearly scoped implementation tasks over owning technical direction
• You are uncomfortable making decisions with architectural or long-term design impact
• Your experience with backend systems at scale is limited or surface-level
• You tend to treat performance, scalability, reliability, or security as secondary concerns rather than core design constraints