Senior Backend Engineer - Low Carbon Tech (LCT)

• Take total technical ownership of key platform components, shaping direction and bringing clarity to ambiguous problems while ensuring solutions are well-designed, scalable, and maintainable.
• Consistently write production-ready, self-documenting code that requires minimal revision, and actively improve testing strategies, non-functional requirements (performance, security, scale), and test infrastructure.
• Tackle systemic bottlenecks and architectural risks across multi-service configurations before they hit production, utilizing highly systematic debugging approaches.
• Mentor other engineers, lead technical discussions, and perform rigorous code reviews to leave our systems, practices, and people stronger than you found them.

This role directly enables the rapid scaling of low carbon technologies (EV chargers, solar, batteries, heat pumps) in homes, accelerating the energy transition and reducing carbon emissions.

• 5+ years experience of robust backend development with deep expertise in systems design, database optimization (PostgreSQL/MySQL), and cloud execution.
• Excited by the possibilities of integrating AI tools into your workflow to iterate quickly, combined with the discipline to rigorously check and ensure code quality.
• Clear communication skills, with a proven ability to translate complex technical constraints and architectural risks cleanly to non-technical stakeholders.
• A genuine curiosity about the green technology landscape and passion for getting clean energy into millions of homes.

Competitive salary (discussed during recruitment), unique culture with autonomy and amazing co-owners, perks including recognition as best company to work for, and a supportive environment. Remote or London office options available.

Octopus Energy is Britain’s largest energy supplier, combining world-class tech with brilliant humans to drive the renewable energy transition. OE Tech is the engineering and product organisation inside Octopus Energy, building products that lower bills and enable greener living.