Senior Full Stack Engineer

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Who We Are:

We have built the new way for energy to be transacted.

tem exists to fix a creaking energy market. Today's wholesale system is stacked in favour of the few - a relic of the oil and gas era, riddled with markups and middlemen. We're changing that.

Our product, RED™, is built on a proprietary pricing engine that bypasses the wholesale market, enabling businesses to buy energy produced by renewable generators directly. That means clear, auditable transactions that ensure affordable bills and fair compensation - giving every business real ownership and control over where their energy comes from.

Since launching in 2021, we've saved UK businesses and generators over £25 million, powering a growing network of forward-thinking companies, from Pizza Pilgrims to Silverstone.

Backed by top-tier VCs including Atomico and Albion, we're creating a new category in energy - one that's decentralised, direct, and built on trust.

We’re looking for a Senior Staff Engineer to shape the technical direction of our customer acquisition and customer success platforms, accelerating product delivery while building the architectural foundations for long-term scale.

This is a company-level technical leadership role. You’ll operate as a force multiplier across multiple teams — setting architectural vision, driving cross-platform initiatives, and ensuring our systems are resilient, extensible, and built for rapid growth.

In your first 12 months, you’ll lead the design and delivery of foundational systems that redefine how brokers, customers, and internal teams interact with energy services — from real-time pricing and quoting engines to intuitive self-serve platforms and intelligent internal tooling. You’ll partner with Engineering, Product, and Leadership to ensure we are building the right systems, in the right way, for the next stage of our growth.

This role combines deep hands‑on engineering with strategic technical ownership and organisational influence.

• Set Technical Direction: Define and evolve the architecture across our acquisition and success platforms, ensuring scalability, resilience, and clarity of ownership across teams.
• Drive Multi-Team Initiatives: Lead complex, cross-functional engineering efforts that span teams and systems — aligning stakeholders, reducing ambiguity, and delivering high-leverage outcomes.
• Build & Ship: Remain deeply hands‑on — designing, coding, and reviewing critical components across back‑end systems, APIs, infrastructure, and front‑end applications.
• Strengthen Foundations: Improve platform reliability, developer experience, observability, testing strategy, and deployment practices to enable faster, safer shipping across the organisation.
• Accelerate Product Innovation: Partner closely with Product and Design to translate ambiguous problem spaces into scalable technical solutions, balancing speed with long‑term quality.
• Multiply Impact: Mentor Staff and Senior Engineers, raise engineering standards, and act as a trusted technical advisor to leadership.
• Plan for Scale: Anticipate bottlenecks before they emerge — proactively designing systems, processes, and data flows that support rapid company growth.

Must‑Haves:

• Senior technical leadership experience: Experience operating at Staff+ or Senior Staff level in a high‑growth startup or scale‑up, with clear evidence of organisation‑wide impact.
• Architectural depth: Proven ability to design and evolve complex distributed systems spanning APIs, event‑driven workflows, data systems, and front‑end applications.
• Multi‑team influence: Experience leading cross‑team initiatives and driving alignment across engineering, product, and business stakeholders.
• Modern tech expertise: Deep experience with:
  • Python and/or Node.js
  • AWS serverless architecture (Lambda, API Gateway, Dynamo
    
    DB)
  • Event‑driven systems and asynchronous workflows
• Strong front‑end fluency: Confident architecting and building modern, performant React applications that integrate seamlessly with complex back‑end systems.
• Product & business alignment: Demonstrated ability to connect technical decisions to business outcomes and customer experience.
• Navigating…