Founding Software Engineer (React and Python)
About the Opportunity
You will be joining an elite founding engineering team that includes the world’s number one authority in Multi Agent Reinforcement Learning, seasoned Meta Product leaders, and one of the only people in the UK who has trained a trillion token language model from scratch. This role is based in London, with two to three days per week on site, and offers a top tier salary plus equity package to reflect the strategic and high impact nature of the work.
Why This Role Matters
You are part of the initial engineering core, playing a pivotal role in shaping and scaling the technology platform from the ground up.
You will work alongside leading researchers and product strategists at the intersection of cutting edge reinforcement learning and large scale foundational models.
You will enjoy a rare opportunity to influence direction, architecture and go to market execution, with both immediate impact and long term upside via equity.
Role Responsibilities
• Architect, design and build foundational systems and platforms that underpin next generation AI driven products
• Collaborate closely with leading researchers and product strategists to refine MVPs, prototype innovative workflows and accelerate iterations to production
• Scale and optimise infrastructure to support high throughput training, inference and deployment of both multi agent reinforcement learning systems and enormous language models
• Implement robust MLOps best practices including data pipelines, model versioning, monitoring, automated deployment and continuous integration
• Drive end to end ownership from ideation to deployment, performance and scaling
• Mentor future hires and define scalable engineering culture, processes and tooling
Candidate Profile
• Proven track record (five plus years) in engineering roles involving scalable, machine learning intensive systems whether via start ups or technology critical environments
• Deep familiarity with large scale model training and production deployment, especially for reinforcement learning or transformer based architectures
• Hands on experience building and maintaining Frontend applications - React, Typescript
• Strong programming background in Python and or relevant frameworks such as TensorFlow, PyTorch or Hugging Face
• Fluent in cloud native development, containerisation, orchestration (for example Docker or Kubernetes) and CI/CD
• Exceptional problem solver with an entrepreneurial mindset who is comfortable with ambiguity, fast iteration and changing priorities
• Eagerness to collaborate with world class academics and product professionals to shape high impact solutions
What’s on Offer
• Top of market salary benchmarked for senior founding engineers in London
• Significant equity stake aligned to reward substantial contributions and long term upside
• Flexible hybrid working model with two to three days per week on site in London, balancing focused collaboration and deep work
• Direct exposure to groundbreaking research, product innovation and machine learning operations including multi agent reinforcement learning and trillion token language model training
• A start up like environment with world class talent combined with the discipline to build with scale in mind