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Herndon, VA, US

Function:  Digital Technology & Innovation
Job Category:  Digital Technology and Open Innovation

Senior Full-Stack Software Engineer


Wärtsilä is an innovative technology company known for being a forerunner in the Marine and Energy markets. Every day, we – Wärtsilians - put our hearts and minds into turning Wärtsilä's purpose of enabling sustainable societies with smart technology, and our Smart Marine and Energy visions into reality. Our ultimate aim is to provide increased value to both our customers and society. New, game-changing ideas and continuous improvement have been part of our DNA since 1834. Together, we can create new business opportunities and more sustainable future that we can all be proud of. 

We want to transition the world towards a cleaner future. By pushing the boundaries of engineering and technology, we can make it work. We are always on the lookout for future-oriented talent – want to join the ride?


Senior Full Stack Software Engineer

Wärtsilä Energy Storage & Optimisation (ES&O) is the leading global energy storage provider. Our mission is to deliver integrated energy solutions that build a resilient, intelligent, and flexible energy infrastructure – unlocking the way to an optimized renewable future. By integrating renewables, energy management technology and storage with traditional energy resources, we reinvent clean energy production from the largest and most complex grids to the most remote and essential microgrids. We play a key role in Wärtsilä’s vision towards a 100% renewable energy future through flexibility, reliability and integration and a more sustainable world for us all. We are seeking a mid-level Software Engineer to join our growing software team located in our software development center in Herndon, VA, USA.


As a Senior Full Stack Engineer, you will focus on these responsibilities:

  • As part of Wärtsilä’s ES&O GEMS software product team you will be responsible for contributing to our backend servers, UI, and deployment infrastructure.

  • Develop a data-centric, rich web platform for power plant equipment control, data visualization, and advanced analytics.

  • Help build GEMS into a world class, intelligent power plant and grid controller, support the path forward to 100% renewable energy.
  • Participate in an agile development environment.
  • Develop feature and other technical documents.


To be successful in this role, we expect you to have:

  • 3+ years of demonstrated experience with professional front and back-end development.

  • Strong knowledge of React for the UI and NodeJS for the backend.

  • Professional expertise in underlying technologies including HTML, CSS, TypeScript, and the V8 JavaScript Engine.
  • Professional expertise in developing REST and Websocket APIs.
  • Working knowledge of networking, Docker, Linux and code testing.
  • Experience working in an agile development environment using common tools such as JIRA and Git.
  • Ability to embrace a fast-moving environment and comfortable with quickly adapting to changing priorities.

  • Experience with setting up deployment of software and troubleshooting issues.

  • Experience developing complex software projects in commercial product settings.
  • Experience working with SQL-based relational databases.
  • Development experience with Java and or Python.
  • Deployment experience with Kubernetes.
  • Experience with time series databases InfluxDB or TimescaleDB.
  • Performance analysis and tuning for high-throughput data ingestion and aggregation.
  • Authentication protocols (OpenID, OAuth, etc.)
  • Experience with setting up system and application monitoring solutions.
  • Knowledge and/or interest in electrical concepts, power grids, renewable or green energy.
  • B.S. Degree in Computer Science, Engineering (Computer, Electrical, Mechanical), I.T., or equivalent years of industry experience.


Why you and us

You will be a part of a global organization with local presence and work in an exciting and dynamic working environment with highly motivated and skilled co-workers. We offer interesting and challenging work tasks, as well as personal and professional development in a great team. 

If you feel excited by being a part of this working environment and think your personal skills and qualities match the job requirements, we look forward to receiving your job application.


Successful applicant must be authorized to work in the USA without sponsorship.


We look forward to hearing from you. Qualified candidates must apply online:



Wärtsilä North America values our employees. We offer a competitive salary and comprehensive benefits package.   Wärtsilä North America is an EOE/AA employer. 


Vaccination is a vital tool to reduce the presence and severity of COVID-19 cases in the workplace, in communities, and in the nation as a whole. The spread of COVID when working in customer facilities and project sites can lead to costly site shutdowns, for which Wärtsilä could be deemed financially responsible. Many local government authorities require proof of vaccination to enter the state or country, and many of our customers require proof of vaccination to be on a project site. In line with legal regulations Wärtsilä has implemented a COVID-19 policy on vaccination and testing to reduce the risk of transmission on Wärtsilä premises. Wärtsilä strongly encourages all employees to be vaccinated to protect themselves and other employees.



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.

This is Wärtsilä

Wärtsilä is a global leader in smart technologies and complete lifecycle solutions for the marine and energy markets. By emphasising sustainable innovation, total efficiency and data analytics, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers. In 2020, Wärtsilä’s net sales totalled EUR 4.6 billion with approximately 18,000 employees. The company has operations in over 200 locations in more than 70 countries around the world. Wärtsilä is listed on Nasdaq Helsinki. Find out more at




Nearest Major Market: Washington DC