Senior Software Engineer
Wärtsilä
Company Overview
Wärtsilä Oyj Abp
Helsinki, Finland
1834
Approximately 18,300 employees globally (source: wartsila.com). Revenue figures for 2023 are not detailed in available sources.
What They Do
Wärtsilä Energy specializes in providing flexible engine power plants that can operate on sustainable fuels, alongside energy storage systems and optimization technologies such as the GEMS platform. Their offerings include full lifecycle services aimed at balancing renewable energy sources and enabling 100% renewable grids (source: wartsila.com). The company’s product lineup features utility-scale Quantum battery energy storage systems designed for compactness and efficiency, intelligent software for real-time control, and hybrid solutions that integrate engines with storage capabilities (source: wartsila.com). Target markets encompass power utilities, independent producers, and industries across 180 countries that require reliable baseload power, peak shaving, or grid stability in the face of increasing solar and wind intermittency (source: wartsila.com). Wärtsilä differentiates itself through a global portfolio that exceeds 18 GWh of storage deployed or contracted, emphasizing bankable reliability and expertise in decarbonizing energy systems (source: wartsila.com).
Projects & Track Record
Wärtsilä has an impressive track record, having installed 79 GW of power plant capacity across 180 countries and over 130 energy storage systems, with a global storage portfolio exceeding 18 GWh (source: wartsila.com). Notable projects include the tenth energy storage system for Flow Power in Australia, the fourth stage of Origin Energy’s Eraring battery system, and a synchronous condenser power plant designed for an Australian mining operation (source: wartsila.com). The company is also engaged in ongoing projects such as the Eraring battery stages and co-research initiatives aimed at enhancing predictive engine safety (source: wartsila.com). Key clients include Flow Power, Origin Energy, and various mining operations in Australia and Mauritania, showcasing Wärtsilä's commitment to delivering reliable energy solutions (source: wartsila.com).
Recent Developments
In the past two years, Wärtsilä has made significant strides, including the announcement of its tenth Australian energy storage project for Flow Power and the renewal of an operation and maintenance agreement for a Mauritanian gold mine (source: wartsila.com). The company has also introduced the first power plant with a synchronous condenser for Australian mining, aimed at integrating renewable energy sources (source: wartsila.com). Additionally, Wärtsilä has appointed Luke Witmer as Vice President of Software Engineering for Energy Storage, reflecting its commitment to innovation in this sector (source: wartsila.com). The company has set fire safety benchmarks with its Quantum3 system while advancing the Eraring battery project, further solidifying its leadership in energy solutions (source: wartsila.com).
Working There
Wärtsilä offers a diverse range of roles across various departments, including engineering, product development, sales, and software engineering, particularly in the development of the GEMS platform (source: wartsila.com). The company employs over 18,300 individuals across 77 countries, with hiring occurring at its Helsinki headquarters and globally across more than 230 locations (source: salestools.io). The workplace culture emphasizes collaboration and innovation, featuring modern facilities in Helsinki that include open-plan offices, wellness rooms, and fitness centers (source: salestools.io). Documented benefits include support for work-life balance and a purpose-driven environment that fosters creativity and technological advancement (source: salestools.io).
Last updated on Feb 23, 2026 | Report an issue
Job Description
Wärtsilä Energy Storage is powering the shift to a cleaner, more resilient grid.
We work at the front lines of the energy transition, helping partners around the world maximize the value of renewables through grid-scale battery systems, advanced software, and expert services. Our portfolio includes the industry-leading GEMS Digital Energy Platform, utility-scale battery solutions, and lifecycle services that keep storage assets optimized and ready when it matters most.
With over 17 GWh of storage deployed or under contract across 130+ projects globally, we're shaping how the grid of the future works.
In a world of rising complexity and accelerating change, we're looking for future-focused talent to help us design, deliver, and support the energy systems of tomorrow.
Sound like your kind of challenge? Let's build it together.
Join us in building part of the green energy future. We are looking for a full stack Node.js and React engineer to develop cloud applications for clean energy systems in a competitive, big-data ecosystem. This role will work across backend services, frontend user experiences, APIs, data workflows, and internal tools that support engineers and operators working with large scale battery systems in powering green energy infrastructure.
Required Qualifications
- 2+ years of related experience and/or BS in Computer Science
- Strong hands-on experience with Node.js and React
- Experience building production web applications, APIs, and backend services
- Experience with modern TypeScript development
- Experience with frontend tooling such as Vite, Jest, Webpack, or similar tools
- Experience working with PostgreSQL or other relational databases
- Experience using Docker, Git, GitHub, and collaborative development workflows
- Familiarity with cloud-hosted applications, preferably on Google Cloud Platform
- Ability to write clean, maintainable, well-tested code
- Strong debugging, communication, and teamwork skills
Preferred Qualifications
Experience with large-scale data or data-intensive applications
Experience supporting applications deployed on Google Cloud Platform
Familiarity with Go or Python
Experience with CI/CD workflows, GitHub Actions, or cloud deployment practices
Ability to work autonomously, communicate clearly with teammates, and help shape practical product and engineering improvements
At Wärtsilä we value, respect and embrace all our differences, and are committed to diversity, inclusion and equal employment opportunities; everyone can be their true self and succeed based on their job-relevant merits and abilities.
Please note that according to Wärtsilä policy, voluntary consent for a security check may be required from candidates being considered for this position, depending on the applicable country.
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Job expired?Please let Wärtsilä know you found this job on Rejobs. It helps us grow and get more people working in renewable energy.
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About the role
June 17, 2026
Full time
Company
- Reston, Virginia, United States
2+ years of related experience
UTC-05:00
