Principal Engineer, Full Stack (TypeScript, React)

Salary: £100,000 - 100,000 per year

Requirements

• Advanced full stack development skills including TypeScript backends, microservices, APIs, React, and ideally React Native (willing to learn)
• Experience of leading and mentoring engineers to drive technical excellence and a culture of collaboration
• Strong understanding of distributed systems, RDBMS (Oracle), and data modeling trade-offs
• Experience of integrating AI and agentic systems into business workflows and apps
• Good understanding of cloud-native architecture and modern engineering practices such as CI/CD, Test Automation, monitoring, and observability
• Experience of transitioning systems or platforms, including dual running and incremental switchover
• Collaborative and pragmatic mindset, comfortable working closely with Product Managers to explain technical aspects and trade-offs

Responsibilities

• Act as a technical authority and role model for engineers across engineering teams / Agile Squads
• Lead and own technical transformation and architectural initiatives in collaboration with the Enterprise Architect
• Mentor engineers and drive high standards of quality, security, reliability, and operability across the stack
• Collaborate with Engineering Leads to help teams navigate change, migration, and transition of critical live systems
• Leverage AI and automation tools to improve processes
• Shape and evolve the platform, services, and system boundaries as the company scales

Technologies

• AI
• Architect
• CI/CD
• Cloud
• Oracle
• React
• React Native
• Security
• TypeScript
• microservices
• JavaScript
• NodeJS
• Fullstack

More

We are a well-established consumer-facing financial services company based in London, dedicated to helping individuals manage debt while undergoing a technical transformation and scale-up following recent investment. We offer a competitive salary up to £110k, a bonus scheme, 25 days holiday, a pension plan, and an Employee Assistance Programme. Our fantastic new offices feature wellness rooms and an onsite gym, and we embrace a flexible work environment allowing for remote work two days a week. This is an opportunity to make an impact as part of a new team in a role that you can help shape.

last updated 14 week of 2026