Overview

Senior Software Engineer (Kotlin) – Hybrid on-site role in Central 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. You’ll lead one of their core teams, diving deep into production systems, identifying bottlenecks, and driving long-term architectural decisions that support scale, resilience and product growth.

What You’ll Do

• Own and evolve platform architecture across distributed systems.
• Analyse production systems to uncover and resolve performance issues.
• Lead backend design using Kotlin (or JVM), supporting a polyglot mindset.
• Collaborate across engineering to improve practices, tooling, and system design.
• Mentor and influence technical direction company-wide.

Tech & Environment

What Theyre Looking For

• Deep JVM/backend experience; Kotlin a bonus, but not required.
• Strong systems thinker with a track record of architectural leadership.
• Experience scaling production systems in fast-moving product environments.
• Clear communicator who enjoys cross-functional collaboration and technical ownership.

Want to work on complex problems with real-world environmental impact?

Apply now and help shape the future of clean energy at scale.

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Information Technology and Engineering

Industries

• Software Development