tem
Senior Full Stack Engineer
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Senior Full Stack Engineer at tem – Rebuilding Energy Transactions
Who We Are
We’re revolutionising the energy transaction landscape by making it transparent, fair, and efficient.
Our mission is to restore power to its rightful users: customers and businesses—while tackling 21st-century challenges like decarbonisation, AI-driven efficiency, and equitable pricing.
Why We Exist
The global energy market is broken:
- Legacy operators and intermediaries dominate.
- Systems weren’t designed for rapid decarbonisation, AI scalability, or fair access for users.
- Vast inefficiencies persist through opaque pricing, opaque fees, and rigid workflows.
We built tem, the first AI-native transaction infrastructure—cutting unnecessary costs, automating workflows, and embedding transparency at scale.
Our Impact
- Secured $75M Series B (2025), led by Lightspeed Venture Partners, with participation from Albion, Atomico, Allianz, Hitachi Ventures, and Schroders Capital.
- Scaled ** globale****; our product, RED, has processed billions in energy transactions for thousands of customers globally.
- Vision: AI-driven energy infrastructure as the bedrock of fair, sustainable markets worldwide.
The Role: Senior Full Stack Engineer
Join us as we rearchitect market infrastructure to make transparency, efficiency, and sustainability the default.
Teams We’re Building For
- Platform (foundational services, CI/CD, developer tooling).
- Billings (scalable, reliable transaction plumbing).
- Payments (cutting-edge automation for financial flows).
- Customer Acquisition (sales portals, salesforce integration).
- Customer Success (post-sale onboarding and workflows).
What You’ll Do (First 12 Months)
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| Area | Focus |
|---|---|
| Customer & Broker Portals | Design/optimise workflows in high-stakes environments. |
| Billing & Payments | Build and scale systems that are highly transparent and regulatory-compliant. |
| Developer Experience | Enhance tooling, CI/CD, and shared services (e.g., Guardrails for sketchy decisions). |
| Internal Operations | Build dashboards, automation, and integrations (e.g., clean energy contract instruments). |
Key Responsibilities
- Build with impact: Develop scalable, reliable full-stack systems in modern frameworks (React + Python/JS backends).
- Shape the experience: Engineer intuitive interfaces for customers, brokers, and internal teams.
- Improve how we ship code: Own cross-functional tooling (e.g., project reorgs, conspicuous CI/CD checks).
- Collaborate: Partner with Product, Design, and Customer teams to solve hard systems-level challenges.
- Perpetuate excellence: Drive clean code, rigorous testing, and strong documentation for high-impact work.
Must-Have Requirements
▶ Startup/pace experience: Owned full-stack projects in a scalable, high-velocity environment. ▶ Full-stack fluency: Proficiency in:
- Python/Node.js for backend logic.
- React for UI + modern JavaScript frameworks. ▶ Cloud-native expert: Deep AWS experience, with hands-on use of:
- Serverless (Lambda, API Gateway).
- DynamoDB and streamlined data pipelines. ▶ User-centric mindset: Translate complex problems into elegant technical solutions. ▶ Collaborative expertise: Regularly embedded in cross-functional teams (Engineers + PMs + Designers).
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Nice-to-Haves
- Energy/regulated sector exposure.
- Worked building platforms for brokers/sales teams (industry: telecom, fintech, etc.).
- Familiarity with real-time data systems (e.g., Market Data, trading platforms).
- Experience shipping internal automation tools (e.g., slackbot exchanges, all-hands dashboards).
Benefits & Perks
- Compensation: Current band at £81,300 (with twice-yearly market-based raises).
- Stock Options: Ownership of tem’s energy transformation mission.
- Over PTO: 25 paid days + public holidays (swap them for your ideal breaks).
- Annual bonuses: Teammate birthday day(s) off + monthly wellbeing budget.
- Flexible work: Fully remote, EMEA-wide, core-hours agility, no obligatory Friday meetings.
Refresh/Wellbeing Budget
- Up to £1,200/€1,200/yr for remote setup (co-work, Tech-based that uplifts them).
- Up to £150/€150/month any which optimise althesis (therapy, gym, meditation apps).
** Interview Process**
Timeline: ~2–3 weeks.
- Talent intro (30 mins) to align on purpose.
- Online interview with Engineering Managers (60 mins) – expectations/media ownership checks.
- Technical group discussion (90 mins) – dive into peers + role-specific tech modelling.
- Culture-add conversation (45 mins) – explore stakeholder alignment and two-way fit.
We welcome applications from all backgrounds, especially those historically underrepresented in tech/energy. If you’ve shot the moon over an obstacle in the past, we want your voice.
Excited? Apply via the link here ⚡.
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Jessica, London
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