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Owen Thomas

Staff-Principal Full Stack Engineer | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-170k + Equity | 3 days hybrid in London

Hybrid

London, United kingdom

Senior

Full Time

31-01-2026

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Skills

Communication Problem Solving TypeScript PostgreSQL Coaching Architecture react node.js Next.js React.js Express

Job Specifications

Staff-Principal Full Stack Engineer | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-170k + Equity | 3 days hybrid in London

Opportunity:

We're supporting a hyper-growth fintech client that is also tech-for-good. They’ve got big hiring plans for the year and are currently looking for Staff & Principal Full Stack Engineers to join the team. You’ll be working with Typescript, React.js, Node.js, Next.js & more, working to shape the product direction and technical architecture as they continue to scale their business and expand into new markets.

What You'll Be Doing as a Staff-Principal Full Stack Engineer | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-170k + Equity | 3 days hybrid in London

Own the end-to-end product lifecycle, from ideation and design to implementation, deployment, feedback, and measurement
Communicate new features with internal and external stakeholders, gathering input pre-implementation and supporting launches
Design and build intuitive, high-performance web interfaces for business users
Lead the design and delivery of high-impact, user-facing web interfaces with a focus on performance and usability
Establish and uphold engineering standards through testing strategy, documentation, and code review practices
Act as a technical mentor and multiplier, coaching engineers, unblocking teams, and raising the overall technical bar

Core Skills for the Staff-Principal Full Stack Engineer | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-170k + Equity | 3 days hybrid in London

Have 10+ years of experience in software engineering
Strong proficiency in React, TypeScript & Node.
Proven frontend & backend engineering skills
Experience working with Next.js, Express & PostgreSQL
Experience in high pace early-stage businesses, with the ability to work end-to-end across the entire product development process, taking high ownership & accountability.
Have experience mentoring engineers, and driving higher standards across the team.
A problem solving, product engineering mindset.
Strong understanding of frontend & backend software engineering best practices
Strong written & verbal communication skills.

Nice to have:

Experience in regulated environments (ideally fintech)
Experience working with AI tooling

Details for the Staff-Principal Full Stack Engineer | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-170k + Equity | 3 days hybrid in London

Tech Stack: React, TypeScript, Node, Next.js
Location: 3 days hybrid in London
Start: ASAP

If interested in this Staff-Principal Full Stack Engineer | Hyper-Growth Fintech & Tech-for-Good | Typescript, React.js, Node.js, Next.js | £110k-170k + Equity | 3 days hybrid in London, please apply here and we will contact you if it's a good match! :)

About the Company

Hey, we are Owen Thomas. We are a relationship first recruitment partner for Data, Product & Engineering, across Contract and Permanent roles in the UK & Europe. Humanness matters. We believe that empathy is the core of great recruitment; bringing opportunity and businesses to life, beyond what a person can see on a website. All done with our OT personal touch. Our mission: To be leaders within our specialisms and create unrivalled opportunities both internally and externally. We balance purpose and profit. Actively in... Know more