Senior Software Engineer ,

Want to work in a field that’s anything but ordinary?

Energy trading systems are real-time, market-critical platforms where correctness, latency, and reliability directly impact trading outcomes across the Baltics.

We are looking for a Senior Software Engineer to join the Zeus Team and help build and evolve the systems behind energy trading and flexibility services. You will work on high-impact distributed systems, contribute to architecture decisions, and take ownership of production-grade software in a complex and fast-moving domain.

Your contribution to this goal is to:

• actively shape the technical direction through design discussions and implementation;

• collaborate with Product Owners, Engineering Managers, and Solution Architects to shape the future of our energy trading and flexibility systems;

• design and implement robust, secure, and maintainable software solutions for real-time data flows and market integrations;

• mentor and support team members while fostering knowledge sharing and engineering best practices;

• drive improvements in performance, reliability, and deployment processes;

• contribute hands-on to development, code reviews, and system design.

With us, you can:

• develop and shape mission-critical systems at the heart of Enefit’s energy trading and flexibility ecosystem;

• work in a complex, high-impact domain that directly contributes to a sustainable energy future;

• work with modern technologies and enjoy creative freedom in solution design;

• be part of a supportive, learning-driven culture alongside talented colleagues;

• enjoy 5 additional vacation days after your first year;

• choose a well-being package that suits you, including health insurance and/or Stebby services.

You are a great match if you have:

• a strong background in software engineering, architecture, or DevOps;

• a strong experience with C#/.NET Core (or other languages, with a willingness to switch to C#);

• experience with frontend frameworks (For example: React, Angular, Vue);

• strong experience with relational databases such as PostgreSQL or MSSQL;

• a solid understanding of event-driven systems and streaming platforms, including Kafka and WebSockets;

• familiarity with microservices, containerization (Docker, Kubernetes), and CI/CD pipelines;

• a proactive and collaborative mindset, with the ability to translate business needs into technical solutions;

• a strong cultural fit: you value clarity, collaboration, curiosity, and mentorship, enjoy helping teams grow, and thrive in a learning-focused environment;

• willingness to take full operational ownership, including system monitoring, reliability, incident management, and participation in a 24/7 on-call rotation;

• bonus: an understanding of data lakehouse architectures (e.g., Apache Iceberg, Starburst, and medallion architecture).