📈 Who We Are:
We're rebuilding the energy transaction system, making it transparent and fair.
tem exists to put power back in the hands of people. Today’s wholesale energy market is stacked in favour of the few. It's a product of an age of oil and gas, riddled with markups and middlemen. We’re changing that.
Our product, RED™, built on a proprietary pricing engine that bypasses the wholesale market, enables businesses to buy the energy produced by renewable generators directly. That's 100% transparent transactions, ensuring affordable bills and fair compensation, to give every business ownership and control over where their energy comes from.
Since launching in 2021, we’ve saved UK businesses and generators over £20 million, powering a growing network of forward-thinking companies, from Pizza Pilgrims to Silverstone. Backed by top-tier VCs such as Atomico and Albion, we’re creating a new category in energy - one that’s local, decentralised, and built on trust.
🏅 The Role:
We’re looking for a
Senior Full Stack Engineer to design and build the systems that power our customer acquisition and success platforms. You’ll be at the heart of delivering new features that improve how brokers, customers, and internal teams engage with energy services.
In your first 12 months, you’ll lead development of intuitive customer-facing portals, streamline internal workflows through automation, and contribute to the foundations that enable us to scale quickly. You’ll work closely with Product Managers, Designers, and fellow Engineers to bring ideas to life - from concept to production.
🚀 Responsibilities:
- Build with impact: Develop full-stack features across modern front-end frameworks and serverless back-end systems, with a focus on performance, reliability, and usability.
- Shape the experience: Build intuitive, high-quality interfaces and tools that improve the way customers and brokers interact with our platform.
- Improve how we ship: Contribute to internal tooling, frameworks, and engineering workflows that help us deliver faster and with greater confidence.
- Collaborate cross-functionally: Partner with Product, Design, and other Engineers to design thoughtful, user-centred solutions to complex problems.
- Maintain high standards: Write clean, well-tested code, contribute to code reviews, and help improve team practices and documentation.
🎯 Requirements:
Must-Haves:
- Proven product delivery experience: Experience as a Full Stack Engineer in a startup or fast-paced product environment, with ownership of key projects from start to finish.
- Front- and back-end fluency: Strong experience with Python and/or Node.js, and modern JavaScript frameworks like React.
- Cloud-native skills: Experience working with AWS services, especially serverless tools like Lambda, API Gateway, and DynamoDB.
- User-focused mindset: Comfortable turning product and user problems into simple, elegant technical solutions.
- Team-first approach: Experience working in cross-functional teams where Engineers, Designers, and Product Managers collaborate closely.
Desirable:
- Experience building platforms or tools for brokers, sales partners, or operational teams.
- Exposure to the energy sector or other regulated industries.
- Familiarity with real-time data systems or internal workflow automation.
✨ Benefits & Perks:
- Competitive salary - our current band for this role is £80,500 or equivalent in local currency.
- We review salaries twice a year using real-time market data, with transparent, consistent pay for the same role and level.
- Stock Options - everyone on the team has ownership in our mission.
- 25 days holiday + public holidays - Swap public holidays for ones that matter most to you. Plus, get an extra day off for your birthday 🎉.
- Remote & flexible working - We’re fully remote with clear core hours, and no internal meetings on Friday afternoons.
- Home working & wellbeing budgets:
- Up to £1,200 / €1,200 annually to upgrade your remote setup (co-working passes, equipment, etc.).
- Up to £150 / €150 monthly on anything that supports your wellbeing - from therapy to gym memberships to meditation apps.
🗣️ Interview Process:
Our processes normally take around 2-3 weeks from first call to offer - please let us know about any adjustments to timelines that may be required.
- First call with our Talent Team (30 Mins). This is to understand your experience, motivations, and discuss the role in more detail.
- Behaviour Interview with our Engineering Managers (60 Mins). This is your chance to really understand the role, the expectations, and ensure alignment on ways of working.
- Technical Interview with the Team (90 Mins). You’ll meet with potential peers in this session and will discuss technical topics and experiences.
- Culture-Add Interview with Stakeholders (45 Mins). The final session will be with two cross-functional stakeholders, and will explore how your values align with ours, and is designed to be a genuine two-way conversation, your chance to understand what it’s really like to work at tem.
We welcome applications from people of all backgrounds, experiences, and identities, including those that are traditionally underrepresented in the tech and energy sectors. If you’re excited about this role but not sure you meet every requirement, we’d still love to hear from you. Your unique perspective could be exactly what we’re looking for.
Compensation Range: £80.5K
