Senior Software Engineer

St1 Nordic Oy; Helsinki; On-site; EUR 60,000 - 90,000; Full time

Job summary

St1 Nordic Oy is seeking an experienced Software Engineer to join the Software Engineering team, working at the intersection of energy transition and modern software development. You will help drive AI-integrated pipelines, collaborate with business stakeholders, and contribute to end-to-end delivery across multiple domains.

The role emphasizes hands-on AI tool experience, technical depth, and the ability to communicate clearly with both business and technical teams.

Qualifications

• Solid hands-on experience with available AI tools.
• Strong communication skills and ability to work with stakeholders across business and tech.

Responsibilities

• Be part of a forward-deployed delivery team across one or several business domains, bridging what is technically possible with business needs.
• Collaborate with business stakeholders, architects, technical specialists, and AI agents on requirements analysis and technical design from scoping to delivery.
• Plan, implement, and validate solutions with the team, ensuring maintenance and operational support.

Skills

AI tools

Communication skills

Job description

We are looking for an experienced Software Engineer to join St1's Software Engineering team, a team which operates at the intersection of St1's energy transition journey and modern software development. We handle the full lifecycle of software products and solutions across multiple business domains. Charging or fueling your car, getting it through an automatic car wash, or tracking how cooking oil becomes sustainable biofuel: all of it happens with software our team builds.

You will work closely with business stakeholders, architects, and technical specialists, from early scoping through to delivery. This is a forward-deployed role: you are as comfortable in a room with the business as you are in detailed analysis of the solution. You bring technical depth to the discussion, and communication skills are as important as tech competence.

The AI dimension of this role goes beyond using a coding assistant. We are actively rethinking how software engineering should be done in the age of AI: building AI-integrated pipelines, working with agents, and exploring what it looks like when humans and AI work as a team. We expect you to have solid hands-on experience with available AI tools, and the curiosity to keep pushing further.

How you’ll help drive the change

Joining St1, you’ll be part of running and developing a profitable business that invests in long-term energy solutions. Together we achieve the extraordinary through everyday work. As a Software Engineer, you’ll play a key role in…

• Being part of a forward-deployed delivery team working across one or several business domains, bridging the gap between what is technically possible and what the business and customers need.
• Working with business stakeholders, architects, technical specialists, and AI agents on requirements analysis and technical design, from early scoping through to delivery.
• Planning, implementing, and validating solutions with your team, and ensuring a reasonable level of maintenance and operational support.
• Providing technical leadership and helping align development practices across teams, not just your own solutions. Championing efficiency, transparency, and scalability in how we build products.
• Building AI-integrated development pipelines and tools, working with agents, testing agentic approaches, and helping the team adopt AI-native ways of working.
• Challenging existing ways of working and helping us rethink how software engineering should be done now.
• Keeping an eye on the technology landscape and making sure what we propose today does not become a problem tomorrow.

What you bring to the team

We’re looking for a colleague with the drive to challenge, collaborate and grow. To thrive in this role, you likely have:...