The Company

The energy industry is undergoing one of its biggest transformations in decades.

We're partnering with a well-funded, early-stage climate technology company building software that sits at the heart of the transition towards a cleaner, more intelligent electricity grid.

Rather than improving existing systems, they're building an entirely new platform from the ground up - combining real-time data, distributed hardware, AI, and energy trading to solve complex problems that have a genuine impact on the future of energy.

Still a small engineering team, they're at the stage where every engineer has a meaningful influence on the product, technical direction, and success of the business.

You'll join a highly technical, product-focused engineering team building software that powers real-time operational and commercial decision making.

This is a backend-first role (Python ≈70%) with exposure across the full stack, working on data-intensive systems where correctness, scalability and performance genuinely matter.

You'll work across multiple product areas - from backend services and APIs through to customer-facing products, internal tooling and complex operational workflows.

Expect plenty of ownership, ambiguity, and the opportunity to solve difficult engineering problems from first principles.

- Building and owning backend services in Python

- Developing scalable APIs and data-heavy systems

- Designing products that process large volumes of real-time information

- Working closely with Product to deliver features end-to-end

- Contributing across the stack where required (TypeScript)

- Building software that interacts with physical devices and operational systems

- Improving reliability, performance and engineering standards as the platform scales

This is a fast-moving Product Engineering environment where engineers are trusted to own problems rather than simply deliver tickets.

- Python

- TypeScript

- AWS

- PostgreSQL

- Modern API architecture

- Event-driven & distributed systems

- CI/CD

- 2-6+ years of software engineering experience

- Strong backend engineering experience (Python preferred)

- Comfortable contributing across the full stack

- Experience building data-heavy or highly numerical products

- Product mindset with strong ownership

- Comfortable operating in startup environments

- Excellent problem-solving ability

- Strong communication and collaboration skills

Nice to have:

- Experience within energy, trading or financial markets

- Billing or payments platform experience

- Maths, Physics or Engineering background

- Evidence of exceptional technical achievement or deep personal passion for building products

This role will suit engineers who enjoy solving difficult business problems just as much as writing great code.

- Introductory conversation

- Technical pairing session

- Product & systems design discussion

- Final conversation with the founders

A collaborative interview process focused on real-world engineering rather than algorithm memorisation.

- Join an exceptionally early-stage business tackling genuine technical complexity

- Work on products involving real-time data, distributed systems and intelligent decision making

- High ownership from day one with direct access to founders

- Small, highly capable engineering team with no unnecessary hierarchy

- Opportunity to influence architecture, product and engineering culture

- Equity alongside a competitive salary

- Work on technology with meaningful climate impact

If you're a product-minded software engineer who enjoys solving complex backend problems, thrives in startup environments, and wants to build systems where every decision has real-world impact, we'd love to hear from you.

Apply with your CV and we'll be in touch if there's alignment.

Product Engineer (Backend, Full Stack) | Python, TypeScript, AWS | Climate Tech x Energy Trading | Real-Time Systems, High Ownership, 0→1 Product Builds | London (Hybrid, 3 Days) | £80-120k + Equity

Stack mentioned

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