Senior Software Engineer

Ready to take technical ownership of systems that process some of Sweden’s largest data volumes and explore how AI can transform operations? At Tele2, Digital Capabilities & Technology (DCT) is the engine behind our mobile and fixed networks. Within Network Data, our Performance Management team builds and operates the in-house systems that collect, process and analyze performance data across all network domains. We are now looking for a Senior Software Engineer who wants to play a key role in evolving and modernizing our core performance systems. About the team You will join a highly technical team of software engineers responsible for Tele2’s Performance Management platform. We collect and process large-scale telemetry and statistics from mobile and fixed networks, transforming raw data into insights that drive operational and strategic decisions. We are currently evolving our architecture and we actively embrace modern engineering practices, including AI-assisted development tools, to accelerate how we design, build, and maintain our software. This means you will have real influence over architecture, technical direction and ways of working. About the role This is not a junior position. We are looking for someone who can: · Take technical ownership of critical services · Contribute to system design and architectural decisions · Improve performance, scalability and reliability · Mentor and elevate the engineering standards of the team You will work in a Linux-based, containerized environment handling high-volume data streams and backend services. Your responsibilities · Design, develop and evolve backend services in Go and/or Java · Improve and optimize high-throughput data processing pipelines · Drive best practices around CI/CD, testing and engineering quality · Operate and troubleshoot systems in production · Collaborate with architects, analysts and network stakeholders · Contribute to long-term system design and modernization initiatives Participation in on-call rotation may be part of the role. What we are looking for We believe you have: · Several years of professional software development experience · Strong hands-on experience in Go and/or Java · Solid understanding of Linux-based systems · Experience with Git-based CI/CD pipelines · Experience working with containerized environments (Docker/Kubernetes) · Experience with Kafka or other event-driven architectures · Experience in designing scalable backend systems · Understanding of networking fundamentals It is a strong plus if you have experience with: · Ansible or infrastructure automation · System design in high-availability environments · Performance optimization of large-scale data processing · Observability tooling (Prometheus, Grafana, ELK) Who you are You are a curious and hands-on software engineer who thinks beyond your own code. You enjoy understanding how systems fit together, experimenting with new technology and turning ideas into reliable software. You communicate clearly, collaborate without prestige and take ownership of what you build. You make complex systems understandable to others through clear documentation, code reviews and shared technical decisions. You actively spread knowledge and build solutions that more than one person can operate and evolve. Why this role matters Our systems are central to how Tele2 monitors and improves network performance. We are now exploring how AI and automation can transform the way NOC and other operational teams work with network data. This is an opportunity to: Shape the architecture of systems in a critical and complex domain Work with high-volume, real-world network data Build and evolve critical systems using real-world data Work across software engineering, data, AI and network operations Have visible impact across the organization A few words from the manager I'm Joachim Borgh, and I proudly lead the Performance Management team, a group of 18 highly motivated individuals. Together, we foster a culture of collaboration and ambition, we value openness and getting things done. We're responsible for shaping the future of Performance Management and we thrive on constant improvement, we collaborate without prestige, and make sure to deliver on our promises. Join us in our mission to push the unlimited possibilities in communications. Why Tele2 A culture of natural born challengers – At Tele2 we don’t just do things the traditional way. We challenge the status quo and push boundaries to create smarter and more valuable solutions for our customers. You will be part of a culture that values curiosity, initiative and collaboration, where new ideas are welcomed and everyone’s contribution matters. Inclusive and supportive environment – We believe in fostering a creative and flexible workplace where people can bring their whole selves to work. Diversity and inclusion are important to us, and we strive to create an environment where people feel welcome, respected and supported in growing both personally and professionally. A sustainability challenger – We are proud that Tele2 has been recognised as Europe’s Climate Leader by the Financial Times and named as Sweden’s most sustainable company by Time Magazine and Statista, reflecting our strong commitment to reduce emissions, transparency and long-term climate goals. Our efforts focus on three areas where we can make the biggest difference: advancing a circular economy, combating climate change, and protecting children online. By embedding these focus areas into how we operate and innovate, we aim to create positive impact for people, planet and profit. Interest and application Would you like to be a part of the Tele2s value-driven and including culture? Then hit the “apply now” button and let’s find out if we’re a match! Please note that in compliance with personal data management regulations (GDPR), we are unable to accept CVs via email. Warmly welcome to submit your application! To ensure an inclusive and fair recruitment proces