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Confidential company

Job listing

London, United Kingdom~£200k

Principal Engineer at VC-backed fintech startup

Are you a hands-on technical leader ready to build the future of financial infrastructure? We are looking for a Principal Engineer to lead the greenfield development of an agentic pension administration system. This is a rare chance to architect a complex AI system from scratch with a focus on enterprise security and startup velocity. If you thrive in high-stakes environments and love building zero-to-one, this ~£200k role at a well-funded fintech startup is for you.

Overview

Role overview

As a Principal Engineer, you will lead the greenfield development of a sophisticated agentic system for pension administration. You will be hands-on from day one, building core infrastructure from scratch with a heavy focus on enterprise-grade security. This role combines startup velocity with the technical complexity of modern agentic AI architectures.

Company

About the company

VC-backed fintech AI startup

Responsibilities

What you will do

  • Architect and build an agentic pension administration system from scratch while remaining hands-on with code.
  • Implement enterprise-level security protocols and robust architecture to handle sensitive financial data.
  • Navigate the transition from zero-to-one development to scaling a complex AI-driven platform at high velocity.

Candidate profile

Who this is a fit for

  • Deep experience building and deploying agentic systems or complex AI-driven workflows.
  • Strong background in enterprise-grade security and building scalable, secure cloud architectures.
  • Proven track record of operating effectively in early-stage environments with a preference for hands-on building.

What makes it remarkable

Why this role is remarkable

  • Rare opportunity to lead a greenfield project building complex agentic systems from the ground up.
  • Join a well-funded startup backed by top-tier VCs at a pivotal early-stage growth point.
  • High-impact leadership role where you define the technical vision and security standards for an entire industry category.

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