10% of Europe's CO₂ emissions are caused by residential heating, and energy bills are out of control. Aira is here to change that.

With our intelligent Aira Heat Pump at the heart, we're making the switch to clean energy-tech easier and more affordable. Helping Europe turn off gas and slashing energy costs one home at a time.

Founded in 2022, and with 1000+ employees and counting, Aira is driving the clean energy revolution by providing homes with modern clean energy-tech solutions such as solar power, battery storage solutions, and heat pumps. With a state-of-the-art production facility in Poland, an HQ in Stockholm, Sweden, and hubs across the UK, Germany, and Italy, Aira is well on track to install clean energy-tech into 5 million homes by 2034.

About the role

As a Backend Engineer on our Customer Solutions team, you'll build the intelligent systems that power Aira's growth across Europe. This role sits within our Customer Acquisition area, where you'll develop critical backend infrastructure including intelligent recommendation systems, dynamic pricing optimization, and market expansion capabilities. Working in an agile environment with cross-functional teams, you'll help scale our technical platform across diverse European markets while handling complex technical and regulatory requirements.

In this role, you will:

• Build and maintain our customer solution matching platform—the backend systems that analyze customer inputs and property characteristics to recommend optimal clean energy solutions
• Develop scalable backend services that enable market teams with pricing capabilities and support company bets on new products through intelligent algorithms
• Create flexible, event-driven systems that can easily onboard new clean energy products and adapt to different markets, currencies, and regulatory requirements
• Design and implement APIs and microservices that support rapid geographic expansion while maintaining high performance and reliability

We're transforming how clean energy solutions are discovered and delivered across Europe through smart backend systems. If you enjoy building scalable systems that directly drive business growth and enable market expansion in a mission-driven environment, this role offers exceptional technical challenges and impact.

What you bring to the team

• Strong experience with Java and Spring Boot
• Solid understanding of databases and data modeling (SQL and NoSQL)
• Experience with automated testing (unit tests, integration tests)

• Experience building scalable, distributed systems
• Familiarity with cloud platforms and containerization
• Knowledge of modern development practices (CI/CD, code reviews, agile methodologies)

Nice to have:

• Experience with recommendation engines, pricing algorithms, or matching systems
• Database experience (DynamoDB, PostgreSQL)
• Event-driven architectures (Kafka, message queues)
• Cloud DevOps (Docker, Kubernetes, AWS/GCP)
• gRPC and Protobuf
• Infrastructure as Code (Terraform)
• Experience at fast-growing companies expanding into new markets
  

Please note:

As summer is a time when many of our team members are on vacation, our recruitment process will be slower than usual. We may not be able to review applications and start interviewing until early August, once everyone is back.

Thank you for your patience and understanding. We truly appreciate your interest in joining us, and we look forward to connecting with you soon!

What is in it for you?

Impact & Growth

• Build systems that directly drive Aira's expansion across Europe and enable market teams
• Work on challenging technical problems including recommendation engines and pricing optimization
• Develop expertise in clean energy markets while contributing to meaningful climate action
• Build scalable infrastructure that supports rapid business growth and product diversification

Team & Culture

• Collaborate with talented, mission-driven teams across multiple disciplines and international markets
• Work in an agile, fast-paced environment with modern engineering practices
• Enjoy mentorship opportunities and career development in a growing engineering organization

Work Environment

• Hybrid work model with flexibility to balance office and remote work
• Brand-new office at Norra Stationsgatan 93 in Stockholm, conveniently located near Sankt Eriksplan and Odenplan stations
• Competitive compensation and benefits package

At Aira, we champion the next-generation energy as well as diversity and inclusion. We firmly believe that a diverse workforce fosters innovation and creativity, enhancing our ability to serve customers and communities effectively. We welcome individuals from all backgrounds, cultures, and perspectives to join our team. Our commitment is to uphold equality and inclusivity, fostering a collaborative environment where everyone can thrive and contribute to a better future for our people and the planet.