Senior Software Engineer

United Statesfull_timeVerifiedPosted 16 Jun 2026

About the role

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 expereince 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 databasesExperience using Docker, Git, GitHub, and collaborative development workflows
Familiarity with cloud-hosted applications, preferably on Google Cloud PlatformAbility to write clean, maintainable, well-tested codeStrong debugging, communication, and teamwork skills

Preferred Qualifications

Experience with large-scale data or data-intensive applicationsExperience supporting applications deployed on Google Cloud PlatformFamiliarity with Go or PythonExperience with CI/CD workflows, GitHub Actions, or cloud deployment practicesAbility to work autonomously, communicate clearly with teammates, and help shape practical product and engineering improvements

Last application date: 30/06/2026 

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.

This is Wärtsilä 

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. Our team of 18,300 professionals, in more than 230 locations in 77 countries, shape the decarbonisation transformation of our industries across the globe. Read more on www.wartsila.com. 

#WärtsiläEnergyStorage