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

Owen Thomas | B Corp™

Greater London

Hybrid

GBP 80,000 - 120,000

Full time

5 days ago

Be an early applicant

Get a reply from this employer

Your resume and cover letter, tailored to exactly what they’re hiring for.

Get past ATS filters

Benefits offered by this job

Equity

Bonus

Hybrid work

Job summary

Owen Thomas | B Corp™ in London is seeking a Product Engineer (Backend, Full Stack) to build real-time systems and high-ownership 0→1 product builds. You will work across Python and TypeScript, with AWS, in a climate tech x energy trading context.

The role is backend-first (Python ~70%) with exposure to the full stack, delivering scalable, data-heavy systems and APIs. Hybrid work, 3 days in the office, and a salary range of £80-120k plus equity and bonus.

Qualifications

2–6+ years of software engineering experience.
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.

Responsibilities

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.

Skills

Ownership

Startup experience

Communication

Problem-solving

Collaboration

Tools

Python

TypeScript

AWS

Event-driven systems

CI/CD

Job description

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
Event-driven & distributed systems
CI/CD

2-6+ years of software engineering experience
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
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.

Get your free, confidential resume review.

or drag and drop your file here.