Principal Engineer

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

Job summary

FundApps (SteelEye merged) is seeking a Principal Engineer to set the technical direction across the Surveillance estate and work with our most senior engineers on its toughest problems. You will stay hands-on, reviewing architecture, reading and writing code, and joining incidents.

The role balances deep technical detail with a 10,000-foot view, ensuring architecture coherence, high craft standards, and a robust security model across AWS and Azure environments.

Qualifications

• Experience leading engineering teams and delivering complex systems.
• Strong architectural and design competencies across SaaS platforms.
• Proven ability to manage incidents and drive reliability.

Responsibilities

• Set technical direction for the Surveillance estate and ensure coherence across teams.
• Review architecture, contribute code, and participate in on-call incidents.
• Collaborate with senior engineers to raise engineering craft and security posture.

Skills

Technical leadership

Architectural direction

Code review

Incident management

Cloud strategy

Tools

AWS

Azure

Job description

About the role

SteelEye, now merged with FundApps, provides communications, trade and order surveillance to some of the world’s largest financial institutions.

As a Principal Engineer you will set technical direction across the Surveillance estate and work through our most senior engineers on its hardest problems.

We deliver enterprise SaaS to hundreds of clients, many of them running the same platform under very different regulatory, security and scale expectations, and doing that well is an engineering problem in every layer rather than an operational one. Delivery sits with the teams building our products. What sits with you is whether the whole thing holds together: whether the architecture is coherent, whether the standard of engineering craft is rising, whether the security model makes sense end to end, whether we know production is working, and whether our most senior engineers are getting better.

Our clients expect strong technical assurance and our platform runs across AWS and Azure. The decisions you influence determine how safely teams can make changes, how quickly we can activate clients and how efficiently we can operate.

This is a Principal role with real leadership attached, and it stays technical. You will stay hands on: reviewing architecture, reading and writing code, and joining incidents. The role moves between deep technical detail and a 10,000 foot view, often on the same day.