Jack & Jill
Senior Full Stack Engineer (£400-£600 / day) at Volter
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Job Title
Senior Full Stack Engineer (£400-£600 / day)
Salary
£400-£600 / day
Company Description
Volter is a climate-tech platform backed by top-tier VCs, building a modern B2B energy solution described as "Octopus Energy for industry." Founded by experienced entrepreneurs who have scaled multi-billion dollar businesses, Volter provides radical transparency and data-driven renewable energy products to help commercial customers cut costs and carbon without legacy complexity.
Job Description
Join Volter's founding team as a Senior Full Stack Engineer on a six-month contract to build the infrastructure for clean energy. You will own features end-to-end—from backend services in Go/Python to frontend interfaces in React—while developing complex ETL pipelines for smart-meter data, accelerating the global transition to renewables through high-velocity engineering.
Location
London, UK
Why this role is remarkable
- Work directly with seasoned founders who have previously scaled businesses to multi-billion dollar valuations and are now tackling the climate crisis with top-tier VC backing.
- Join a high-velocity founding team where you will ship impactful product features in days rather than weeks, maintaining genuine end-to-end ownership of the platform.
- Solve complex technical challenges in the renewables space by building the first transparent, data-driven platform for B2B energy procurement, pricing, and forecasting.
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What You Will Do
- Design and build backend services and APIs for billing, pricing, and forecasting using Go or Python, ensuring high reliability and performance for data-intensive operations.
- Develop user-facing flows in TypeScript and React while building ETL pipelines to ingest time-series data from smart meters and market price feeds.
- Collaborate closely with founders and data scientists to implement feature serving and real-time scoring, making pragmatic trade-offs to deliver value to customers quickly.
The ideal candidate
- Proven track record of shipping production software in early-stage startups, with a strong backend focus and proficiency in Go, Python, TypeScript, and React.
- Deep experience with data-intensive architectures, including schema design, query optimization, and handling complex time-series data or half-hourly utility data feeds.
- Exceptional communicator who thrives in high-autonomy environments, balancing rapid prototyping with infrastructure-as-code, CI/CD, and security-by-default practices to raise the team's engineering bar.
Who are Jack & Jill?
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Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
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