Staff Full Stack Engineer, tem
£100k
Energy transactions platform for renewable energy
Be an early applicant
Energy transactions platform for renewable energy
21-100 employees
Be an early applicant
£100k
21-100 employees
Company mission
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.
Role
Who you are
- Track record in fast-paced environments: Experience as a Senior or Staff Engineer in a high-growth startup or scale-up, with a strong bias toward shipping
- System design at scale: Proven ability to design and build complex systems that power both back-end automation and front-end experiences
- Modern tech expertise: Deep experience with Python, Node.js, and AWS serverless architecture (e.g., Lambda, API Gateway, DynamoDB)
- Front-end capabilities: Skilled in developing responsive, performant front-ends using modern JavaScript frameworks such as React
- Product-minded mindset: Experience working closely with product and design teams to solve user problems, not just deliver features
- Can deal with ambiguity: Comfortable navigating changing priorities and incomplete information to make strong technical decisions
Desirable
- Exposure to the energy sector or other regulated industries
- Experience building internal tools or platforms for brokers, sales teams, or support agents
- Familiarity with real-time data processing or agentic/AI-driven systems
What the job involves
- Build with impact: Architect and deliver end-to-end systems - from internal automation to customer-facing portals - ensuring they are scalable, fast, and user-friendly
- Own the platform: Improve and extend core platforms and developer tooling, making it easier for teams to build, test, and ship quality software
- Drive innovation: Rapidly prototype and iterate on new workflows and product ideas that expand our offering and improve the broker and customer journey
- Partner cross-functionally: Collaborate with Product Managers, Designers, and other Engineers to scope, design, and deliver high-impact solutions
- Raise the bar: Lead by example through code reviews, mentorship, and championing engineering best practices across the team
Application process
- 1. First call with our Talent Team (30 Mins). This is to understand your experience, motivations, and discuss the role in more detail
- 2. 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
- 3. Technical Interview with the Team (75 Mins). You’ll meet with potential peers in this session and will discuss technical topics and experiences
- 4. 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
Our take
tem is a next-gen energy transactions company that changes the way renewable energy is bought, sold and powered. Rebalancing the playing field away from "Big Energy", tem creates affordable, traceable and smart energy transaction management tools.
The company provides businesses and consumers with access to the same financial benefits as Big Energy companies by distributing its own purchased energy to customers. Once they’re signed up, customers are matched with a suitable generator, and the tem platform helps execute contracts, take payments, and manage invoicing.
This is a truly disruptive concept, and is proving to be a successful one. tem currently processes over £50 million in direct transactions and saves millions for over 1000 UK businesses wanting to switch from traditional utilities tied to the wholesale market. Whilst UK consumers are notoriously hesitant to switch providers, recent soaring energy prices is luring many into giving it a go.
Steph
Company Specialist at Welcome to the Jungle
Insights
40% female employees
Company
Employee endorsements
Challenging work
"The projects I have worked on at tem. have involved solving greenfield problems. Each project has challenged me in a different way keeping the work..."
Funding (last 2 of 3 rounds)
Sep 2024
$14.1m
SERIES A
Jun 2023
$3.4m
SEED
Total funding: $17.6m
Company benefits
- 25 days holiday
- Day off on your birthday
- Fully remote - expect quarterly meet ups with your team
- Personal office budget £1200 / 1400€ per year
- Paid for company trip twice a year. Previous locations included Barcelona, Budapest and Marrakech.
- Wellbeing allowance of £150 / 170 € per month to spend on your wellbeing
- A generous options (stock) package
- Salary benchmarking twice a year. We aim to pay at the upper percentile (75th percentile) of the market, using London-based benchmarks. One of our core pay principles is “Same work. Same base pay.” This means we use spot rates instead of broad salary bands: everyone doing the same role at the same level earns the same base salary.
Company values
- Innovate with purpose
- Go all-in
- Keep it real
Company HQ
Nine Elms, London, UK
Articles
Leadership
Joe McDonald
(Co-Founder)Resident CEO, Joe leads the creative vision behind tem. the brand, product and its platform. He is a passionate visionary who loves to climb mountains and has the most adorable dog.
Jason Stocks
(Co-Founder)Jason is a world-class commercial leader with proven track scaling up high performing diverse teams. He is also a power house of high energy, high enthusiasm and a secret scuba diver instructor.
Bartlomiej Szostek
(Co-Founder)Bartek is an innovative programmer, with a craving for maximum performance, clean code and good architecture. He has a very cute baby girl who loves to join in on our calls - we’re training her young!
Ross Mackay
(Co-Founder)Data scientist, software engineer + physics whizz - Ross currently lives in the west country and will beat you hands down in a game of monopoly deal.
Diversity, Equity & Inclusion at tem
Charlie Stephenson (Head of People)
- Tem is all about championing small business communities, fighting for transparency and advocating for fairness in the broken energy sector. We put these principles at the heart of our business model and work hard to ensure our platform is accessible and simple for all.
- We're fully remote to ensure everyone can thrive in an environment that works best for them. Whether you prefer working from home in a Disney onesie or going to a bustling cafe, we support whatever helps you be your most effective self. Being fully remote also means we're lucky enough to hire team members from different countries and cultures and we spend time every Monday having a social call to share what makes us tick.
- We care about you and live our value of keeping it real. This means actively seeking your feedback through quarterly pulse surveys and implementing initiatives that truly matter to you. Anyone who joins us has a voice and one that is heard and valued.
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