Software developers in London — with a production AI practice.
Developers Core is a UK-registered engineering company. We work with founders in London and remotely worldwide, delivering fixed product and AI engagements with clear commercial terms and senior builders on the work — from production RAG, agents, and LLM systems to full-stack product engineering.
UK commercial entity
Invoice through a UK-registered company. Straightforward for procurement and startup finance teams.
Timezone overlap
Natural coverage for UK/EU working hours, with flexibility for US stakeholders when needed.
Sprint economics
2–4 week fixed deliveries when you need senior capacity without a full-time hire cycle.
What London startups hire us for
Most engagements start when an in-house team needs senior delivery on a hard, time-boxed problem — usually an AI feature that has to survive real users, compliance, and cost.
- Production RAG over internal or regulated documents
- AI agents that call internal APIs with real guardrails
- LLM features shipped inside an existing React / Node / Python app
- Computer vision and imaging pipelines
- Rescuing a stalled MVP or failed freelancer handoff
- Multi-region cloud and platform engineering
See the detail in our case studies across FinTech, healthcare, and SaaS.
Need software developers in London?
Tell us the product context and what “done” means. We reply within one business day.