Lead Software Engineer
Stealth AI Fintech Startup London Hybrid (3 days on-site)
We re hiring on behalf of an innovative Fintech startup that is building an AI-driven platform that s rethinking how investors analyse, access, and manage alternative assets (e.g. private equity, private credit and other private markets).
They've built there MVP, raised funding from experienced fintech founders and senior figures in financial services, and are now scaling a category-defining product at the intersection of AI, automation, and finance.
We re looking for an exceptional Lead Engineer to help shape the technical foundation of the company, stay hands-on, and build a world-class engineering team from the ground up.
The Role
This is a hands-on leadership role for someone who wants to code daily, own architecture, and lead by example.
You ll design and build the core AI-powered platform, set technical standards, and work closely with product, data, and leadership to ship intelligent automation and decision-support tools for a legacy industry.
What You ll Be Doing
You ll lead the architecture of an AI-driven investment intelligence platform while staying deeply hands-on across the entire stack, from frontend UX to backend services, AI integrations, and core infrastructure. Working closely with the CTO, data scientists, and product leadership, you ll help shape both the technical direction and the product itself.
You ll build and mentor a small, elite engineering team, setting a high technical bar through example while driving strategy around scalability, security, and reliability. Along the way, you ll explore and integrate emerging AI frameworks, tools, and blockchain technologies to keep the platform at the cutting edge.
What We re Looking For
5+ years of professional software engineering experience
2+ years in a technical or team lead role
Strong ownership mindset; you execute and lead from the front
Excellent communication and decision-making under ambiguity
Node.js, React, and TypeScript
Python for AI workflows and automation
Microservices and distributed system design
Experience with AI / LLM frameworks (e.g. LangChain, OpenAI API, Vertex, LiteLLM)
GCP experience and DevOps best practices (monitoring, observability, CI/CD)
PostgreSQL and relational data modelling
Event-driven systems (Pub/Sub, Kafka) and NoSQL (e.g. MongoDB)
Experience building and running production SaaS platforms
Nice to Have
RAG, autonomous agents, or Model Context Protocol (MCP)
TDD, Agile, and DevOps environments
Blockchain / Web3 integrations or tokenisation frameworks
Cryptography, security, or distributed systems knowledge
Fintech, asset management, or due-diligence automation background
Why Join
Build a category-defining AI product in fintech
Stay deeply hands-on while growing into a senior technical leader
Shape architecture, culture, and engineering standards from day one
Work with an experienced CTO and leadership team
Real ownership and real impact; your code and decisions will shape the company
Backed by serious operators and investors in fintech and financial services
High-trust, high-ambition, low-bureaucracy startup environment