Staff Full Stack Engineer, tem
Sell Side Engine
£100.5k
+ Equity
Energy transactions platform for renewable energy
Be an early applicant
Energy transactions platform for renewable energy
101-200 employees
Be an early applicant
£100.5k
+ Equity
101-200 employees
Company mission
Rebuilding the energy transaction system, making it transparent and fair.
Role
Who you are
- Deep technical depth in backend and systems design, with a track record of owning architecture-level decisions on complex, integration-heavy systems
- Comfortable in our core stack: Python, AWS serverless (Lambda, API Gateway, DynamoDB, EventBridge), and event-driven architectures. React/TypeScript exposure is a plus but not the bar
- Comfort operating without a full spec: able to take a defined slice of an ambiguous problem and turn it into a shippable plan
- Experience delivering work where a critical dependency sits with a team you have no authority over
- Proven product delivery experience: experience as a Full Stack or Backend Engineer in a startup or fast-paced product environment, with ownership of complex projects from start to finish
Desirable
- Prior experience mentoring engineers or setting technical direction, even without a formal leadership title. Not required. We'd rather have a brilliant engineer who has never led a squad than a mediocre one who has
- Experience in energy, fintech, or another regulated, high-stakes commercial domain
- Exposure to workflow orchestration, event-driven systems, or real-time pricing engines
- Experience originating new product lines from scratch rather than only scaling existing ones
What the job involves
- We're hiring a Staff Software Engineer to join Origination & New Products, a new three-person squad inside Sell Side Growth
- Sell Side Growth originates, contracts, and retains the renewable generators whose volume powers our platform - without generators, there's no product
- The engine is scaling fast, and much of the manual process underneath today's pipeline - tendering, contracting, onboarding - needs to be rebuilt to handle that growth rather than buckle under it
- This is a deep, hands-on IC role, not a squad-lead one - that's owned by the Staff/Senior Staff engineer leading the initiative
- You're free to go all-in on the hardest technical problems: integration with Rosso (our pricing and settlement engine), Control Room (our core tendering and pipeline platform), and the deal-gating risk tooling that lets us take on genuinely new categories of commercial risk safely
- We're not hiring for leadership polish here
- We're hiring a ridiculously good engineer
- Go deep on hard systems: Own architecture-level decisions on integration-heavy systems, reasoning clearly about boundaries, contracts, and failure modes
- Build for ambiguity: Take a piece of an undefined, commercially-driven problem and turn it into a shippable plan, within the direction your squad lead sets
- Work across boundaries: Deliver on dependencies that sit with teams you have no authority over, such as Rosso, Data, and Billing, getting integrations right without needing to own the relationship
- Build with impact: Design, build, and ship the hardest parts of the new-product build sequence yourself, backend-first but comfortable moving into the React/TypeScript front end when it matters
- Maintain high standards: Write clean, well-tested code, contribute to code reviews, and help improve team practices and documentation
- ---In your first 12 months, you might:
- Own architecture-level decisions on the integration-heavy systems connecting Origination & New Products to Rosso, Data, and Billing
- Help ship the first new product category live and generating qualified pipeline within 6 months
- Help solve the tendering automation problem that currently limits how much volume the team can quote on - one of the highest-leverage levers for supporting our growth
- Contribute to productising a currently manual, error-prone pricing process that's already turning away large, complex deals
- Design deal-gating risk tooling for commercial risk categories that don't exist yet at tem, within our React/TypeScript and Python/AWS serverless stack
Application process
- 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 (75 Mins). You’ll meet with potential peers in this session and will discuss technical topics and experiences
- Bar Raiser 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
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
$13.9m
SERIES A
Jun 2023
$3.4m
SEED
Total funding: $17.4m
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 & CEO)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 & Chief Commercial Officer)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 & CTO)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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