Software Engineer

Understanding Recruitment; City Of London; On-site; GBP 50,000 - 60,000; Full time

Job summary

A leading clean tech company is seeking a Software Engineer to join their polyglot-friendly team. This role involves designing backend systems primarily using Kotlin, contributing to sustainable energy solutions, and working closely with product and design teams to deliver impactful features. Ideal candidates are those who thrive in a dynamic environment and are eager to make a difference in the clean energy sector.

Qualifications

• Hands-on experience with Kotlin or JVM.
• Strong communication skills
• Ability to learn and adapt to new languages.

Responsibilities

• Design and build backend systems using Kotlin.
• Collaborate with product and design teams.
• Contribute to a culture of curiosity and bold thinking.

Skills

Kotlin

JVM experience

Clear communication

Problem-solving

Job description

Understanding Recruitment provided pay range

This range is provided by Understanding Recruitment. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

Direct message the job poster from Understanding Recruitment

Software Engineer – Polyglot-Friendly Team, Big Impact on Clean Energy

Location: 2 days onsite in London (Zone 1)

Are you a JVM engineer curious about Kotlin – or already loving it?

Want to solve complex problems that contribute to a greener, more sustainable world?

Join a high-calibre engineering team building modern, customer-facing and energy-focused systems in one of the UK’s most exciting clean tech companies.

As the Software Engineer, you will:

• Design and build well-structured backend systems using Kotlin (or learning it quickly if you’ve worked with other languages before).
• Collaborate closely with product and design teams to ship high-impact features to thousands of customers.
• Contribute to a culture that values curiosity, bold thinking and raising the bar – whether you’re an introvert or love a whiteboard.
• Champion clear communication and collaborative problem-solving within a modern engineering setup.
• Help shape a product that’s transforming energy usage at scale, from the inside out.

Tech Stack: Kotlin (JVM), modern backend architectures, CI/CD, microservices, cloud-native platforms (e.g. AWS, GCP)

What we're looking for:

• Either hands-on Kotlin or JVM experience with a proven ability to learn and use other languages.
• Experience in modern tech companies with good engineering practices.
• Strong communicator – you don’t need to be loud, just clear and thoughtful in how you express ideas.
• Appetite to challenge the status quo, take ownership and improve systems and ways of working.
• We’re not the right place for engineers coming from highly structured, slow-moving environments - they are looking for Engineers who like to take risks!

This is a brilliant opportunity to join a team where your ideas are valued, your skills are stretched and your work genuinely makes a difference in the fight for a more sustainable future.

Curious? Excited?

Apply now and let’s build the future of clean energy together.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology and Engineering

• Industries

  Software Development

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