Senior Staff Engineer - Agentic

📈 Who We Are

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.

tem exists to fix a broken global energy market that's long favoured legacy operators, intermediaries, and opaque pricing. Today's electricity system was not designed for rapid decarbonisation, AI-driven efficiency, or fair access for actual users—businesses and generators.

We've built the first AI native transaction infrastructure to reinvent how electricity is bought, sold, and priced. In late 2025, after extraordinary growth, we closed a $75 million Series B led by Lightspeed Venture Partners with participation from Albion, Atomico, Allianz, Hitachi Ventures, Schroders Capital, and others.

🎯 The Role

We're hiring a Senior Staff Software Engineer - Agentic to join our Agentic Service.

Our ambition is for agents to take on somewhere between 50% and 99% of the manual work people across tem do today. You'll own how agents get delivered into tem's Engines and Services, working with stakeholders to understand how their work runs, deciding what to build, and ensuring systems are reliable and safe. You'll lead agents rather than people, running several workstreams in parallel and reviewing their output to production standards.

Nobody will hand you a spec. You'll find the problem, shape the solution, and own the outcome.

In your first 12 months, you might:

• Own agent delivery into several Engines and Services at once, from first discovery conversation to measured time saved.
• Set the architecture for how we use retrieval, orchestration, MCP tools, identity, and evaluation across agentic work.
• Run several workstreams in parallel by leading agents, holding their output to production standards.
• Become the person teams want in the room when deciding what to automate.
• Help teams across tem build and operate their own agents well.

🛠️ Responsibilities

• Find the work: Work with Engines and Services to map how processes run, and decide which parts to automate, rebuild, or leave alone.
• Turn ambiguity into plans: Turn messy requirements into clear architecture and delivery plans that stakeholders understand and agents can execute.
• Prioritise honestly: Weigh competing demands and make trade-offs explicit before committing.
• Design for reliability: Own architecture across concurrent workstreams, with evaluation, access controls, recovery, and human approval designed in from the start.
• Prove the impact: Instrument what you ship so time saved is visible.
• Raise the bar across tem: Codify recurring business logic into reusable building blocks and help teams build and run their own agents well.

✅ Requirements

Must-Haves

• You own the problem as well as the solution: experience working directly with business stakeholders to define what gets built (e.g. technical product lead, tech lead, or engineering manager).
• Built and maintained production agentic systems with real consequence, including multi-agent systems and MCP servers used by real people for real work.
• Depth in RAG: built retrieval systems, compared approaches against requirements, and have opinions on what suits which case.
• Systematic evaluation experience with realistic labelled cases that include failure and permission boundaries.
• Sound reliability and security judgement: enforcing permissions and human approval, persisting task state, and recovering safely.
• You lead agents, not people: orchestrating several agents in parallel, reviewing code, making architectural calls, and spotting system failures without coding day-to-day.

Desirable

• Customer-facing agents that have run in production for months.
• A significant internal process transformed with agents on your own initiative.
• DevOps or CI/CD workflows moved onto agents.
• Advanced retrieval experience, such as graph RAG or agentic RAG.

🎁 Benefits & Perks

• Competitive salary of £117,850 or equivalent in local currency.
• Stock options so everyone has ownership in our mission.
• 25 days holiday plus public holidays, with the option to swap public holidays and your birthday off.
• Remote first and flexible working with core hours and no internal meetings on Friday afternoons.
• Up to £1,200 or €1,200 per year for your remote setup.
• Up to £150 or €150 per month for wellbeing.