Chief Technology Officer / CTO (AI / Machine Learning / LLM)

CTO (Chief Technology Officer) for AI-Powered SaaS Platform | London

About the Company

Our client is a fast-growing AI-powered platform reimagining how top companies operate in their industry. They're not just optimizing existing processes — they're rebuilding them from the ground up for a world where AI fluency is essential. Their clients include leading names across fintech, crypto, and technology sectors.

They're now searching for a hands-on CTO to join their London team and help build the future of their AI-native platform.

The Opportunity

This is a rare opportunity to join a fast-growing startup at a pivotal stage. We're looking for a technical leader who will not only manage a 6-person tech team but lead by example through hands-on programming.

You'll shape the technical architecture, scale the team, and personally build the AI and product capabilities at the heart of the platform — from intelligent scoring and profiling to contextual engagement and autonomous AI agents.

If you love building products, moving fast, and experimenting relentlessly to ship bespoke AI/ML solutions that fundamentally change how users interact with the platform — this role is for you.

What You'll Be Building

• Custom AI/ML products — evaluation engines, intelligent scoring systems, contextual profiling
• Agentic AI tools — autonomous AI agents that engage with users and optimize workflows
• End-to-end platform workflows — built around modern UX and fast, high-signal decisions
• World-class design — a product that users cannot get enough of
• Core infrastructure — ensuring scale, stability, and adaptability across the platform

Must-Have Requirements

Location:

• Critical: Ability to be in London minimum once per week
• Hybrid-first approach with flexibility for deep work

Technical Expertise:

• 8-15+ years in software engineering with 3-5+ years managing and scaling engineering teams
• Strong technical depth in AI/ML — hands-on experience with LLM, NLP, or applied ML systems (2+ years in production)
• Backend mastery — commercial experience with Node.js/Nest.js
• Database expertise — PostgreSQL in production environments
• Cloud infrastructure — AWS deployment and maintenance experience
• Active coder — you still write code regularly and lead by example

Leadership:

• Proven experience hiring and managing engineering teams (5+ people)
• Track record of scaling teams in startup environments
• Technical leadership: code reviews, architecture decisions, mentoring engineers

Mindset:

• Build from scratch — you love to code and build products yourself
• Speed and experimentation — comfortable with fast iterations and ambiguity
• Startup mindset — thrive in dynamic, high-growth environments

Nice-to-Have:

• Frontend skills — React, TypeScript, modern frontend architecture
• Advanced AI tooling — experience with vector databases (Pinecone, Weaviate, pgvector), agentic AI frameworks (LangChain, AutoGPT, CrewAI)
• Prompt engineering expertise and RAG implementations
• Domain experience — understanding of the relevant industry workflows and platforms
• B2B SaaS experience, especially scaling 0→1 products
• Open-source contributions, publications, or talks about AI applications
• Experience working with fintech or crypto companies

Why Join

• Technical ownership — full autonomy to shape the technical direction
• Real-world AI impact — your work directly influences outcomes for leading companies every day
• Product-market fit — building a new category with strong traction and market validation
• Exceptional team — work with people who deeply understand the space and have built successful products before
• Hybrid-first culture — flexibility with regular in-person deep work sessions for real product energy

Compensation & Benefits

• Base salary: £50K-£150K depending on experience
• Equity — meaningful ownership in a fast-growing company
• Employment type: Full-time (UK contract or contractor arrangement available)
• Location: London-based, hybrid working

Hiring Process

1. Submit your CV to our recruitment team
2. Initial screening interview
3. Technical interview with leadership
4. Founder interviews (online or in-person)
5. Final assessment
6. Offer

We move quickly — expect the full process to take 2-3 weeks.

Important Notes:

• Priority consideration for Ukrainian candidates
• Candidates must be able to work in the UK (work permit or EU passport)
• We do not consider candidates from Russia, Belarus, or Kazakhstan

Ready to build the future of AI-powered platforms? Apply now.