Senior Software Engineer

Kambi Sweden AB; Stockholms län; On-site; SEK 600,000 - 900,000; Full time

Job summary

Kambi Sweden AB is seeking a Senior Software Engineer in Stockholms län. This role focuses on designing and maintaining high-throughput backend services using Java and Spring Boot. Candidates should have strong backend development skills, a solid understanding of concurrency, and experience in distributed systems. You will collaborate with various teams to drive software quality and performance while taking ownership of systems end-to-end. The position requires a proactive approach to problem-solving in a complex environment.

Qualifications

• Strong Java & Backend Expertise.
• Solid understanding of Concurrency and multithreading.
• Experience with frameworks like Spring Boot.

Responsibilities

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

Skills

Java & Backend Expertise

Concurrency and multithreading

JVM behavior

Core Java fundamentals

Spring Boot

Tools

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 load

Distributed 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-offsBalance 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