Senior Full-Stack Engineer

About Electric Twin

Electric Twin is pioneering the future of behavioral intelligence using AI. We've built synthetic populations - digital twins of real audiences - that enable organisations to understand human behavior at unprecedented speed and scale. Our platform replaces weeks of traditional market research with seconds of AI-powered simulation, achieving 92% accuracy validated against real-world data.

Founded by Ben Warner (former Chief Data Advisor to the UK Prime Minister, architect of the 2019 election model) and Alex Cooper (19-year British Army veteran, Director of UK mass COVID testing), we serve leading enterprises and government agencies making high-stakes decisions. We're a seed-stage company backed by top investors, with a world-class team combining expertise in AI, behavioral science, and strategic simulation.

We’re now looking for a Senior Full-Stack Engineer to help us build the next generation of applied AI tools.

What You’ll Do

• Build and ship production features end-to-end across Python , SQL , and Next.js .
• Design APIs, data pipelines, and UIs that make complex model outputs intuitive and actionable.
• Own architecture and design decisions — schemas, modularisation, and system patterns.
• Refactor and optimise existing systems for performance and maintainability.
• Improve quality and speed through testing and CI/CD.
• Work side-by-side with founders and senior engineers — we collaborate on-site four days a week.

Requirements

What We’re Looking For

• 5+ years’ experience building production software (exceptional 4+ considered).
• Strong proficiency in Python and SQL for scalable back-end systems.
• Skilled with TypeScript , React , and Next.js for high-quality front-end work.
• Solid testing habits and CI/CD experience.
• Product-focused mindset and attention to code quality.
• Comfortable working on-site in a fast-paced, collaborative startup.

Nice to Have

• Experience with data-heavy or high-throughput systems.
• Exposure to applied AI or LLM integrations (no model training required).
• Familiarity with GCP , especially IAM, networking, and security.

Why Electric Twin

• Impact – Shape both the product and how we build it.
• Pace – We ship weekly; your work goes live fast.
• Team – Small, sharp, and experienced.
• Learning – Work hands-on with cutting-edge AI applications that matter.