Senior Software Engineer

Kambi Sweden AB; Stockholms kommun; On-site; SEK 462,107 - 646,949; Full time

Job summary

Kambi Sweden AB is looking for a Senior Software Engineer in Stockholms län, Sweden. The ideal candidate will design and maintain high-throughput backend services using Java, navigate production challenges, and collaborate with engineering teams. This role demands strong Java and backend expertise, experience with microservices, and the ability to handle performance issues in live systems. If you are ready to take ownership and work in a dynamic environment, Kambi is the place for you.

Qualifications

• Strong Java and Backend expertise with solid understanding of concurrency and multithreading.
• Experience building backend services using frameworks such as Spring Boot.
• Hands-on experience debugging and resolving issues in live systems.

Responsibilities

• Design, build, and maintain high-throughput backend services in Java.
• Solve real production challenges related to performance, failures, and scaling.
• Collaborate closely with engineers and stakeholders.

Skills

Java & Backend Expertise

Concurrency and multithreading

JVM behavior

Core Java fundamentals

Spring Boot

Production Systems experience

Debugging live systems

Observability practices

Performance bottlenecks identification

Microservices and event-driven architectures

Scalability and fault tolerance

Messaging systems (e.g., Kafka)

Tools

Spring Boot

Kafka

Job description

About Kambi

Kambi Group plc is a leading B2B provider of premium sports betting services to licensed gaming operators. Our services provide an end-to-end solution for operators wanting to launch a standalone Sportsbook or bolster their existing offering with an innovative sports betting product. From front-end user interface to customer intelligence, risk management and odds compiling, all built on our in-house developed software, we strive to deliver the ultimate service and solution to our partners.

Our vision is to create the world's leading sports betting experiences, together with our partners.

About the Role

We're looking for a Senior Software Engineer to join Kambi. This is not a standard backend role.

You will work on business-critical systems where:

• Performance matters.
• Reliability is essential.
• Correctness is critical.

We're looking for someone who takes ownership, makes sound technical decisions, and contributes effectively in a complex, high-impact environment.

What You'll Do

• Design, build, and maintain high-throughput backend services in Java
• Work with low-latency, distributed systems
• Solve real production challenges related to performance, failures, and scaling
• Take ownership of systems and features end-to-end
• Collaborate closely with engineers, product, and stakeholders
• Contribute to architectural decisions and technical direction
• Continuously improve system reliability, observability, and maintainability

What You Bring

• Strong Java & Backend Expertise
• Solid understanding of: Concurrency and multithreading
• JVM behavior (memory, garbage collection, performance)
• Core Java fundamentals
• Experience building backend services using frameworks such as Spring Boot
• Experience Working with Production Systems
• Hands-on experience debugging and resolving issues in live systems
• Familiarity with observability practices (logging, metrics, tracing)
• Experience identifying and addressing performance bottlenecks
• Understanding how systems behave under real-world loadDistributed Systems & System Design
• Experience working with microservices and/or event-driven architectures
• Understanding of: Scalability and fault tolerance
• Backpressure and system resilience
• Trade-offs such as consistency vs availability
• Experience with messaging systems (e.g. Kafka) is highly valued
• Ownership & Engineering Judgment
• Take responsibility beyond individual tasks and drive work forward
• Operate effectively in environments with some ambiguity
• Proactively identify issues and drive improvements
• Make sound technical decisions and clearly communicate trade-offs
• Balance simplicity, performance, and long-term maintainability
• Understand the operational and maintenance impact of technical choices

This Role May Not Be the Right Fit If

• Your experience is primarily limited to simple CRUD-based applications
• You have limited exposure to debugging or operating production systems
• You are most comfortable working in environments where requirements are fully defined upfront and change is limited
• You are not comfortable taking ownership of systems end-to-end

Tech Context

• Java (primary)
• Spring Boot
• Distributed systems and messaging (e.g. Kafka)
• Cloud-based infrastructure
• Containerized environments
• Application