We are looking for an experienced Heating Engineer (HVAC/Thermal Engineering) to help shape and scale Sunly’s heat product. In this role, you will focus on analysing thermal systems, developing standardised solutions, selecting equipment and implementing reliable, efficient heat solutions for our customers. Your work will directly influence how Sunly’s heat solutions are designed, built and scaled. 

What you will work on 

• Analysing and improving thermal systems, identifying bottlenecks and optimisation opportunities. 

• Using operational data to optimise operating modes and control strategies. 

• Preparing technical specifications and evaluating equipment to achieve the best total cost of ownership. 

• Creating and maintaining technical documentation (drawings, schematics, installation and maintenance guidelines). 

What describes you

• HVAC Engineer or Thermal Engineer qualification at Level 6 or higher (completed or to be completed soon)

• Higher technical education or equivalent practical experience. 

• Strong system-level understanding (COP/SPF, operating cycles, power balances, hydraulic schematics). 

• Hands-on experience with equipment selection, commissioning and system tuning. 

• Ability to read and produce technical documentation. 

• Fluency in Estonian and English. 

• Genuine interest in renewable energy and an eagerness to use new solutions and AI. 

What we offer

• Support for your wellbeing, inside and outside work - a quarterly sports allowance via Stebby, comprehensive employer-provided health insurance (including dental care and specialist visits), and access to mental health counselling and coaching via siffi.com.

• Time to rest and reset - 28 working days of annual leave, counted only in working days and usable flexibly, plus additional paid days off, including health days and leave for important life events.

• Room to grow professionally - meaningful, hands-on challenges and a dedicated training budget for courses, certifications, and conferences, alongside internal learning opportunities to support your development.

• Flexible hybrid work - we work in a hybrid way, with no fixed rules on office days. You are trusted to balance remote work with time in the office, and while much can be done remotely, a lot happens in the office and being there regularly makes collaboration easier.

• Work that contributes to the energy transition - you will be part of a team building and scaling renewable energy across the region, working on services that support a more sustainable energy system.

If you are excited about contributing to the renewable energy sector, we would love to hear from you! We review applications on an ongoing basis, so we encourage you to apply as soon as possible.