Junior Software Engineer

Fortum Oyj; Espoo; On-site; EUR 42,000 - 66,000; Full time

Benefits offered by this job

Hybrid work model

Flexible working hours

Career development opportunities

Safe and inclusive workplace

Job summary

Fortum is seeking a Junior Software Engineer for our Nordic Development Studio in Espoo. You will design, develop and maintain user-friendly systems that support planning and trading operations in a fast-paced, international setting.

You’ll work as part of an agile team, collaborating with product owners to deliver scalable tools, while growing your skills across technologies and platforms in the energy sector.

Qualifications

• Experience building and maintaining business-critical applications.
• 1+ years of hands-on full-stack experience focusing on frontend development.
• Proficiency with Node.js, Typescript and React for frontend applications.
• Experience with client-server architectures and API development.
• Familiarity with cloud platforms (AWS or Azure) and CI/CD pipelines.
• Knowledge of security practices and DevSecOps.
• Fluency in English, written and spoken.
• Based in Finland, legally allowed to work in Finland.

Responsibilities

• Develop, maintain and refactor business-critical applications.
• Collaborate with product owners and stakeholders through the SDLC.
• Design and implement scalable, reliable tools for planning and trading operations.

Skills

Node.js

Typescript

React

Frontend development

Backend API development

Cloud platforms (AWS/Azure)

CI/CD

DevSecOps

English proficiency

Education

University-level degree in computer science/engineering

Job description

Are you ready to shape the future of energy business applications? Join our Development Studio Nordic team in Espoo as a Junior Software Engineer and help us build and support the next generation of tools to evolve and focus on what matters.

About the role

You are a passionate software developer with a drive for impactful solutions. Do you want to work at the core of the energy industry, developing tools that empower business teams and accelerate the energy transition? As a Junior Software Engineer, you’ll join our agile research & development team, collaborating with product owners and stakeholders throughout the software development lifecycle. You will play an important role in designing, developing, and maintaining easy to use systems that support both our planning and trading operations. Your work will help ensure these systems are scalable, reliable, and aligned with the constantly evolving needs of our business.

Other then that, the role also offers

A dynamic, supportive team environment where everyone’s contribution is valued.

Real responsibility and the opportunity to work on impactful, diverse projects.

We offer a flexible hybrid model, typically 3 days remote work per week.

Chance to learn and develop various technologies.

Opportunities for professional growth and learning in the energy and trading sectors.

Networking with top professionals across the company.

About you

We’re seeking a proactive and independent developer with strong communication skills and a collaborative mindset. You thrive in a fast-moving, international environment and enjoy learning new technologies while applying them to solve impactful business problems. You take ownership of your work and value the freedom to manage your own time and effort.

Required Skills & Experience

• Strong problem-solving mindset, a proactive can-do attitude, and a continuous learning mindset – always eager to explore new technologies and approaches to tackle evolving challenges.
• Experience building and maintaining business-critical applications.
• 1+ years of hands‑on experience in full‑stack software focusing on frontend development.
• Node js, Typescript knowledge, React frontend application development.
• Basic experience with client‑server architectures, backend API development, and system integration solutions.
• Familiarity with cloud platforms (AWS or Azure), CI/CD pipelines, and DevSecOps practices.
• Fluency in English, both spoken and written.
• Based in Finland, the capital area, you must be legally authorized to work in Finland.
• Relevant university-level education in computer science, engineering, mathematics, or related fields.

Additional Valued Skills

• You leverage agentic coding to ensure efficiency, while keeping eye on security and robustness of the software.
• Writing clean, maintainable, and well‑tested code following best practices.
• Understanding of optimization theory and algorithms, including deterministic and stochastic approaches.
• Knowledge of security best practices, IAM/CIAM, and integration patterns.
• Participation in hackathons, programming contests, or open‑source projects.

We offer you At Fortum, we believe in a better future and want to be involved in shaping it. Our workplace is a safe place, both physically and mentally. You will grow with professional colleagues, being trusted and free to challenge yourself. We offer comprehensive benefits, flexible working hours, and hybrid work model to support your productivity, development and wellbeing. We are committed to build diverse teams where everyone feels included and is treated equally. More information about our culture and benefits can be found here. Espoo office is a smoke‑free workplace.

For more information, contact Topi Virkki, Senior Manager, at [e-mail]

To be selected for the position, the applicant must go through background clearance and a health examination including drug testing.

We are Fortum Fortum is a Nordic energy company. We generate and deliver reliable energy to our customers and the Nordic energy system while at the same time helping industries decarbonise their processes and grow. Our core operations comprise efficient and best-in-class low‑carbon power generation, customer services, and heating and cooling. Fortum’s power generation is already 99% from renewable or nuclear sources with one of the lowest specific CO2‑emissions in Europe. Fortum is guided by our ambitious SBTi‑validated emission reduction targets on our way towards net‑zero by 2040. For our ~4,500 employees, we commit to be a safe and inspiring workplace. Fortum's share is listed on Nasdaq Helsinki. fortum.com