Senior Staff Engineer - Agentic

📈 Who We Are:

We are rebuilding the energy transaction, making it transparent and fair.

We're rebuilding how energy is bought and sold. That means cutting out middlemen, connecting businesses directly with renewable generators, and ensuring every transaction is traceable and transparent .

We're a 160+ person team - operators, data scientists, engineers, customer champions and energy experts - backed by top-tier investors including Lightspeed Venture Partners, Hitachi Ventures, Allianz, AlbionVC and Atomico. We closed a $75M Series B round in early 2026, taking our total funding to $94M, and we now power energy for over 4,000 UK businesses across 8,500+ sites , with over £75m in value returned to businesses and generators so far.

We're a technology company solving the energy industry, not an energy company. Some people call us a neo-utility, the neo-bank idea, applied to energy.

The industry is noticing. We were crowned Europe's Most Exciting Tech Company at the GP Bullhound Allstars awards , came in at #6 on LinkedIn's Top Startups 2026 in the UK, #7 on the Scaling Europe 50 of Europe's fastest-growing companies, and #14 on Sifted's AI 100 .

Learn more about us on our website .

🎯 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. Teams across the company want far more agentic delivery than we can currently provide.

You'll own how agents get delivered into tem's Engines and Services. You'll work with stakeholders to understand how their work really runs, decide what to build, and make sure it's designed to be 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 their processes really 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 from across tem and make the trade-offs explicit before committing.

Design for reliability: Own the 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 the time saved is visible, and say so when something isn't moving the number.

Raise the bar across tem: Codify recurring business logic into reusable building blocks, and help teams build and run their own agents well through design reviews, shared patterns and clear handovers.

✅ Requirements

Must-Haves

You own the problem as well as the solution: you've worked directly with business stakeholders to define what gets built, perhaps as a technical product lead, tech lead or engineering manager, and you don't expect a spec.

You've built and maintained production agentic systems with real consequence, including multi-agent systems and MCP servers used by real people for real work.

You have depth in RAG: you've built retrieval systems, compared approaches against requirements, and have opinions on what suits which case.

You evaluate systematically, with realistic labelled cases that include failure and permission boundaries, and you know when an agent is ready for production.

You have sound reliability and security judgement: where to enforce permissions and human approval, and how to persist task state and recover safely.

You lead agents, not people: you already orchestrate several agents in parallel, and you can review code, make architectural calls and spot where a system will fail, without coding day to day.

Desirable

Customer-facing agents that have run in production for months, not weeks.

A significant internal process you transformed with agents, ideally 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 - our current band for this role is £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 for the ones that matter most to you, and your birthday off.

Remote first and flexible working, with clear core hours and no internal meetings on Friday afternoons. We can hire remotely across Europe for this role.

Up to £1,200 or €1,200 per year for your remote setup.

Up to £150 or €150 per month for wellbeing.

🧭 Interview Process

First call with our Talent Team.

Behavioural interview with the Hiring Manager.

Technical interview with the team.

Bar Raiser interview with stakeholders.

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.