Founding AI Platform Engineer - Build from Day One

ByteSearch; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

ByteSearch is seeking a Founding Engineer in London to own and shape the core platform from day one, guiding both technical direction and product. This is a true 0→1 role with high ownership and the chance to set architecture and scale for a category-defining AI platform.

You’ll design and build the core backend systems powering AI-driven workflows, own APIs, data pipelines and distributed systems, and drive LLM orchestration in production while collaborating directly with founders.

Qualifications

• Experience building and shipping AI / LLM-powered systems
• Solid understanding of scalable system design and distributed architectures
• Experience with data pipelines, retrieval systems or similar
• Comfortable operating in a fast-moving, early-stage environment
• Ability to take full ownership from idea → production

Responsibilities

• Designing and building the core backend systems powering AI-driven workflows
• Owning architecture across APIs, data pipelines and distributed systems
• Working on LLM orchestration and retrieval systems in production
• Integrating with external platforms and third-party systems
• Contributing across the stack where needed

Job description

ByteSearch is seeking a Founding Engineer in London to own and shape the core platform from day one, guiding both technical direction and product. This is a true 0→1 role with high ownership and the chance to set architecture and scale for a category-defining AI platform.

You’ll design and build the core backend systems powering AI-driven workflows, own APIs, data pipelines and distributed systems, and drive LLM orchestration in production while collaborating directly with founders.