Senior Staff Engineer, tem
+ Stock Options
Energy transactions platform for renewable energy
Open for applications
Energy transactions platform for renewable energy
21-100 employees
Open for applications
+ Stock Options
21-100 employees
Company mission
Rebuilding the energy transaction system, making it transparent and fair.
Role
Who you are
- Strong Technical Leadership: You’ve operated at Staff or Senior Staff level and have led technically complex initiatives with meaningful business impact
- Distributed Systems Expertise: Deep experience designing and operating scalable backend systems, event-driven architectures, APIs, and asynchronous workflows
- Hands-On Engineering Depth: You still enjoy building software directly - writing production code, reviewing designs, debugging systems, and improving architecture
- Modern Backend Experience: Strong experience with technologies such as:
- Python
- AWS (Lambda, API Gateway, DynamoDB)
- Event-driven/serverless architectures
- Distributed systems and workflow orchestration
- Systems Thinking: You’re comfortable reasoning about correctness, failure modes, data consistency, scalability, and operational trade-offs in complex systems
- Cross-Functional Influence: You can align technical decisions with product, commercial, and customer outcomes while navigating ambiguity effectively
- Pragmatic Problem Solving: You enjoy untangling difficult technical and organisational problems using first-principles thinking
- 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
Desirable
- Experience with high-scale infrastructure or performance-sensitive systems
- Background in platform engineering or internal developer platforms
- Exposure to workflow engines, orchestration systems, or real-time decision systems
- Experience integrating ML models into production environments
- Familiarity with regulated industries such as energy, fintech, or govtech
- Experience evolving systems from startup scale to multi-product platforms
- Knowledge of Kubernetes, Spark, or large-scale data systems
What the job involves
- We’re looking for a Senior Staff Software Engineer to help evolve one of the most critical platforms at tem
- This platform powers complex commercial workflows across forecasting, pricing, optimisation, and deal execution - sitting directly on the path between customer demand and revenue generation
- You’ll work on large-scale backend and platform engineering problems where correctness, reliability, and operational clarity matter deeply. The domain is complex, the stakes are high, and the technical challenges span architecture, scalability, workflow orchestration, data modelling, and developer productivity
- This is a hands-on Staff+ role for someone who enjoys building robust systems in ambiguous environments, driving execution across teams, and shaping technical direction through delivery
- Lead Through Execution: Drive major technical initiatives from design through production, improving scalability, reliability, and correctness across critical systems
- Build Distributed Systems: Design and evolve backend services, APIs, event-driven workflows, and data models that support complex business processes at scale
- Own Critical Platform Infrastructure: Improve the operational foundations of the platform through better observability, testing, deployment safety, and incident reduction
- Solve Complex Workflow Problems: Design systems that handle long-running workflows, asynchronous processing, consistency guarantees, and failure recovery in high-stakes environments
- Work Across Teams: Lead initiatives spanning engineering, product, data, commercial, and machine learning teams - aligning stakeholders and unblocking delivery
- Productionise Machine Learning: Collaborate with ML and data teams to safely integrate forecasting, optimisation, and pricing models into production systems
- Raise Engineering Standards: Mentor senior engineers, influence architectural direction, and improve engineering practices across the organisation
- Design for Scale: Anticipate scaling challenges before they emerge - improving throughput, resilience, and platform evolution as the business grows
Application 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 Interviews with the Team (2 x 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
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
$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 & 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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