Staff Full Stack Engineer

Staff Engineers

We are rebuilding the energy transaction, making it transparent and fair. Our goal is to put power back where it belongs, in the hands of customers and to take on one of the most critical problems of our century, access to low cost electricity.

We've built the first AI native transaction infrastructure to reinvent how electricity is bought, sold and priced. Our technology is designed to cut out the inefficient fees, automate complex market flows, and bring transparency and fairness to energy transactions at scale.

We're scaling internationally and building toward a future where AI-driven infrastructure is foundational to electricity markets worldwide.

Since launch, our modern utility product, known as RED, has already facilitated thousands of business customers and billions in energy transaction value, proving that modern software and AI can transform an industry built on legacy systems.

At tem, we're not just building another energy company, we're rearchitecting market infrastructure so that transparency, efficiency and sustainability become the default, not the exception.

Responsibilities:

• Architect and deliver end-to-end systems, from internal automation to customer-facing portals, ensuring they are scalable, fast, and user-friendly.
• Improve and extend core platforms and developer tooling, making it easier for teams to build, test, and ship quality software.
• Rapidly prototype and iterate on new workflows and product ideas that expand our offering and improve the broker and customer journey.
• Collaborate with Product Managers, Designers, and other Engineers to scope, design, and deliver high-impact solutions.
• Lead by example through code reviews, mentorship, and championing engineering best practices across the team.

Requirements:

• Experience as a Senior or Staff Engineer in a high-growth startup or scale-up, with a strong bias toward shipping.
• Proven ability to design and build complex systems that power both back-end automation and front-end experiences.
• Deep experience with Python, Node.js, and AWS serverless architecture (e.g., Lambda, API Gateway, DynamoDB).
• Skilled in developing responsive, performant front-ends using modern JavaScript frameworks such as React.
• Experience working closely with product and design teams to solve user problems, not just deliver features.
• Comfortable navigating changing priorities and incomplete information to make strong technical decisions.

Benefits & Perks:

• Competitive salary - our current band for this role is £104,000 or equivalent in local currency.
• 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:

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.

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.