---
title: 'Senior Staff Engineer - Agentic at tem'
canonical: 'https://feeny.ai/job/senior-staff-engineer-agentic-tem-united-kingdom-jv88rb346zsc'
type: 'job'
last_seen: '2026-11-08'
---

# Senior Staff Engineer - Agentic at tem

- **Company:** tem
- **Location:** United Kingdom
- **Compensation:** £118k
- **Employment:** full-time
- **Work type:** remote
- **Posted:** 2026-11-03
- **Last confirmed live:** 2026-11-08
- **Apply:** https://jobs.ashbyhq.com/tem/f4d4fad4-532f-4a99-b39e-02d5cc7d4c14

## Job description

📈 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](https://www.gpbullhound.com/articles/allstars-awards-2026-winners-announced/), came in at #6 on [LinkedIn's Top Startups 2026](https://www.linkedin.com/pulse/linkedin-top-startups-2026-20-uk-companies-rise-linkedin-news-uk-xoffc) in the UK, #7 on the [Scaling Europe 50](https://scalingeurope.co.uk/) of Europe's fastest-growing companies, and #14 on [Sifted's AI 100](https://lnkd.in/p/ehxWgJyc). Learn more about us on our [website](https://www.tem.energy/).

🎯 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.

## About tem

## Company Overview
- **One-liner**: tem is building an AI-native transaction infrastructure for energy markets, operating a modern utility (RED) that delivers cheaper, transparent electricity to businesses.
- **Entity Type**: Private (Series B)
- **Headquarters**: London, United Kingdom
- **Founded**: 2021
- **Founders**: Joe McDonald (Co-Founder & CEO), Ross Mackay (Co-Founder)

## Core Business
- **Primary industry**: Energy Technology / Energy Trading & Utility
- **Target customers**: B2B – primarily small-to-medium businesses and renewable generators; expanding to enterprise customers.
- **Mission**: “Universal access to the lowest-cost electricity” by reinventing how energy is bought and sold using AI.

## Products & Services
- **[RED](https://www.tem.energy/)**: A “neo-utility” experience for business customers. Provides transparent, 30% cheaper energy bills with half-hourly metering, no hidden fees, and a digital dashboard for usage and billing. Currently the only utility using tem’s infrastructure.
- **[Rosso](https://techcrunch.com/2026/02/09/tem-raises-75m-to-remake-electricity-markets-using-ai/)**: The core AI transaction engine that matches electricity generators with buyers. Uses machine learning and LLMs to predict supply/demand, automate trading, and remove intermediaries. Planned to be opened to other utilities in the future.

## Market Standing
- **Valuation**: Over $300 million (per a source familiar with the Series B deal, reported by TechCrunch, Feb 2026).
- **Key Metric**: Total funding raised – **$91.9M** (Pre-Seed, Seed, Series A, Series B).
- **Notable Investors/Partners**: Lightspeed Venture Partners (lead, Series B), Atomico (lead, Series A), AlbionVC, Allianz, Hitachi Ventures, Revent, Schroders Capital, Voyager Ventures.
- **Growth Signals**:
  - 6,000+ business sites now run on RED ([tem.energy](https://www.tem.energy/)).
  - Headcount: 99 employees (LinkedIn), with +7.3% monthly growth.
  - Customers include Boohoo Group, Fever-Tree, and Newcastle United FC.
  - 26 active job postings (as of mid-2025), with monthly job postings up 52.9%.
  - Plans to expand to Australia and Texas (US) using Series B funds.

## Competitive Advantages
- **AI-native infrastructure**: Replaces multiple human-driven trading desks and intermediaries with a single AI-powered transaction layer, drastically reducing costs and latency.
- **Transparency & pricing**: Customers save up to 30% on bills compared to wholesale market prices; bills are itemised with no hidden markups.
- **Marketplace dynamics**: Focus on decentralised renewable generators and small businesses creates an ideal environment for the algorithms, and the model scales to enterprise.
- **Dual business model**: RED proves the value of Rosso while generating revenue; Rosso is designed to become the AWS/Stripe of energy transactions.

## Strategic Focus
- **Near-term**: Scale RED in the UK, deepen customer base, and prove unit economics. Continue hiring across engineering, product, and growth.
- **Expansion**: Enter Australia and the US (starting with Texas) to replicate the model in deregulated markets.
- **Long-term**: Open Rosso to third-party utilities to capture all transaction flow, aiming to become the universal infrastructure for energy trading.

## Why Work Here
- **Culture**: Mission-driven team focused on solving climate and energy affordability through technology. Described as a “classic marketplace play” with a strong engineering ethos.
- **Remote-first**: Fully remote work environment (offices in UK but most employees work remotely).
- **Growth & impact**: High-growth startup with $91.9M in funding and a clear path to IPO (CEO has stated intention to go public). Employees have the opportunity to shape the future of energy markets.
- **Open roles**: 26 active positions including ML Engineering Lead, Staff Full Stack Engineer, Senior Analytics Engineer, Principal Product Designer, and more. Strong emphasis on technical talent (32% of workforce in technical roles).
- **Perks**: Not detailed, but the remote setup, equity in a fast-scaling company, and the chance to work on AI infrastructure for a critical industry are key draws.

## Sources
1. [tem.energy](https://www.tem.energy/)
2. [LinkedIn - tem](https://uk.linkedin.com/company/tem-energy)
3. [TechCrunch - Tem raises $75M](https://techcrunch.com/2026/02/09/tem-raises-75m-to-remake-electricity-markets-using-ai/)
4. [Built In - tem energy](https://builtin.com/company/tem)
5. [Ashby - tem jobs](https://jobs.ashbyhq.com/tem)

## Other roles at tem

- [Staff Product Manager - Rosso (Portfolio)](https://feeny.ai/job/staff-product-manager-rosso-portfolio-tem-united-kingdom-hk6a8gkg5ppv) — United Kingdom
- [Portfolio Risk and Treasury Manager](https://feeny.ai/job/portfolio-risk-and-treasury-manager-tem-united-kingdom-jchwsd3qk4g2) — United Kingdom
- [Staff Data Analyst](https://feeny.ai/job/staff-data-analyst-tem-united-kingdom-73yt7xhhegg8) — United Kingdom
- [Staff Backend Engineer - Pricing](https://feeny.ai/job/staff-backend-engineer-pricing-tem-europe-673h7c7n2ek5) — Europe
- [Senior Backend Engineer - Pricing](https://feeny.ai/job/senior-backend-engineer-pricing-tem-europe-cz63s291gqsf) — Europe
- [Staff Full Stack Engineer - Sell Side](https://feeny.ai/job/staff-full-stack-engineer-sell-side-tem-europe-cj1b96pmdafp) — Europe
- [Tech Lead - Payments and Billing](https://feeny.ai/job/tech-lead-payments-and-billing-tem-united-kingdom-9ryv9awfrcad) — United Kingdom
- [Senior Staff Engineer - Payments](https://feeny.ai/job/senior-staff-engineer-payments-tem-united-kingdom-b5tsv8m8pyvp) — United Kingdom
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- [Campaign Manager](https://feeny.ai/job/campaign-manager-tem-united-kingdom-441rjtz1gaj7) — United Kingdom