Jack & Jill
Research Engineer (£70k–£120k + Equity) at Electric Twin
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Research Engineer (£70k–£120k + Equity) at Electric Twin
Research Engineer
Salary: £70k–£120k + Equity
Company Description
Electric Twin is a London-based AI company that has raised $14M from Atomico and LocalGlobe to build synthetic populations for behavioral prediction. Founded by a former Chief Adviser to the Prime Minister and a military commander, they use LLMs to simulate human responses for global brands with 95% accuracy.
Job Description
You will research and build the cognitive architectures that bring AI agents to life, balancing behavioral science with backend engineering. Working within the Science team, you'll design memory systems and decision-making frameworks to create realistic synthetic populations. This is a high-impact role bridging LLM research and production-scale infrastructure.
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Location: London, UK
Why this role is remarkable
- Work on a unique product that uses LLMs to solve the $90B market research problem, achieving 10,000x faster insights than traditional methods.
- Backed by heavyweight investors including Atomico, LocalGlobe, and angels like Marc Andreessen and the CTO of Slack.
- Direct collaboration with academic leaders from the London School of Economics to publish research and define the future of agentic modeling.
Responsibilities
- Design and run systematic experiments to evaluate synthetic agent behavior and validate performance against real-world human data sets.
- Build sophisticated cognitive systems using advanced LLM techniques like chain-of-thought prompting, RAG architectures, and multi-agent tool use.
- Implement robust memory and personality frameworks ensuring AI agents maintain consistent demographics and behavioral patterns across interactions.
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Requirements
- Over 7 years of engineering experience, with at least 1 year hands-on with:
- LLMs
- Production RAG
- Agentic workflows
- Strong research background in quantitative fields such as computational social science, physics, or cognitive modeling to simulate human systems.
- Proficient in Python and backend frameworks like FastAPI, able to transfer complex AI prototypes into scalable production environments.
Jill is currently recruiting for this role from the network of Jack, her AI assistant specialising in career coaching.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
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