Owen Thomas | B Corp™
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) | £80-105k + Equity
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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) | £80-105k + Equity
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.
The Role - 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) | £80-105k + Equity
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.
What You'll Be Doing - 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) | £80-105k + Equity
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- 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.
Tech Stack - 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) | £80-105k + Equity
- Python
- TypeScript
- AWS
- PostgreSQL
- Modern API architecture
- Event-driven & distributed systems
- CI/CD
What They're Looking For - 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) | £80-105k + Equity
- 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
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This role will suit engineers who enjoy solving difficult business problems just as much as writing great code.
Interview Process - 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) | £80-105k + Equity
- 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.
Why Join - 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) | £80-105k + Equity
- 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.
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