Application Guide

How to Apply for Software Developer, Backend/Fullstack

at Wartsila

🏢 About Wartsila

Wärtsilä is a Finnish technology leader pioneering solutions for global decarbonization and sustainability, making it an ideal workplace for developers passionate about impactful environmental technology. The company's focus on innovative B2B digital platforms offers unique opportunities to work on large-scale systems with global reach. Their commitment to advancing sustainable energy solutions through technology makes this role particularly meaningful for those wanting to contribute to positive environmental change.

About This Role

This backend/fullstack developer role involves building Wärtsilä's new B2B customer portal, which serves as the primary digital interface for their global clientele. You'll be responsible for developing architecture, databases, back-end logic, and APIs that directly support commercial objectives while working within the Platform Engineering and Developer Services team. Your work will directly impact how customers worldwide interact with Wärtsilä's sustainable technology solutions.

💡 A Day in the Life

A typical day involves collaborating with the Platform Engineering team on architecture decisions for the B2B customer portal, implementing backend features using Node.js and TypeScript, and working with AWS services including CDK for infrastructure management. You'll likely participate in code reviews, database design sessions for DynamoDB/PostgreSQL, and discussions about how technical implementations support the portal's commercial goals while ensuring best practices for long-term maintainability.

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Interview Prep

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🎯 Who Wartsila Is Looking For

  • Has 3+ years of backend development experience with proven expertise in Node.js, TypeScript, and AWS CDK (specifically mentioned as 'must have')
  • Demonstrates hands-on experience with AWS services, DynamoDB, PostgreSQL, and Docker, with Azure knowledge as a valuable bonus
  • Shows a track record of taking ownership of projects while collaborating effectively in team environments, particularly in platform engineering contexts
  • Can articulate how their technical decisions support long-term business growth and commercial goals in B2B digital platforms

📝 Tips for Applying to Wartsila

1

Highlight specific experience with AWS CDK in your resume - this is explicitly listed as a 'must have' requirement

2

Demonstrate how your previous work contributed to commercial/business goals, not just technical outcomes, since the role emphasizes supporting business objectives

3

Include examples of working on B2B platforms or customer portals, as this is the specific project you'll be developing

4

Showcase experience with both DynamoDB and PostgreSQL, as both database technologies are mentioned in requirements

5

Emphasize collaboration within platform engineering teams, as you'll be working with the Platform Engineering and Developer Services team specifically

✉️ What to Emphasize in Your Cover Letter

["Your experience with AWS CDK and how you've used it in previous backend/fullstack projects", 'Examples of how your technical work has supported business/commercial goals in B2B contexts', "Your understanding of Wärtsilä's sustainability mission and how it aligns with your professional interests", 'Specific experience with customer portals or digital touchpoints for global user bases']

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🔍 Research Before Applying

To stand out, make sure you've researched:

  • → Wärtsilä's specific sustainability initiatives and decarbonization technologies
  • → The company's existing digital platforms and customer engagement strategies
  • → Finnish work culture and Wärtsilä's position in the Nordic tech landscape
  • → Recent news about Wärtsilä's B2B digital transformation efforts

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 Detailed technical questions about AWS CDK implementation patterns and best practices
2 Architecture decisions for a global B2B customer portal handling diverse user needs
3 How you ensure backend systems support commercial objectives and business growth
4 Experience working in platform engineering teams and collaborating with developer services
5 Approaches to database design using both DynamoDB and PostgreSQL for different use cases
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⚠️ Common Mistakes to Avoid

  • Focusing only on technical skills without demonstrating how they support business objectives
  • Not having concrete examples of AWS CDK experience despite it being a 'must have' requirement
  • Presenting generic fullstack experience without emphasizing the backend and platform engineering aspects this role requires

📅 Application Timeline

This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.

Typical hiring timeline:

1

Application Review

1-2 weeks

2

Initial Screening

Phone call or written assessment

3

Interviews

1-2 rounds, usually virtual

✓

Offer

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Good luck with your application to Wartsila!

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