Staff Software Engineer

3 days ago

London Area, United Kingdom Austin Werner Full time £120,000 - £180,000 per year

Senior to Principal Software Engineer | Mission-led Fintech - Hybrid London

Here's the thing. If you're a Senior, Staff, or Principal Software Engineer who wants serious impact without the ego-fest, this will probably speak to you.

I'm partnering with a fast-growing fintech that helps millions manage how they earn, save, and spend from one simple app. Backed by top VC and impact investors. Real users. Real outcomes. I've seen a lot of roles, and this one stands out because the mission isn't a veneer. It runs through product, data, and engineering decisions day to day.

Why this is worth your time

  • Work that matters. You'll ship features that improve financial wellbeing for people who actually need it.
  • Scale that tests your thinking. Millions of active users, real traffic spikes, and data you can do something with.
  • Proper ownership. Fast cycles, low ceremony, and room to shape architecture while mentoring others.

What you'll work with as a Staff Software Engineer

  • Stack: Python, TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS.
  • Setup: Cross-functional squads that care about outcomes, not ticket-ticking.
  • You'll improve scalability, evolve architecture, and still ship. I like that balance. Less pontificating, more building.

What you'll do

  • Design and build reliable, scalable systems that hold up under load.
  • Lead on architecture decisions. Pick the right pattern for the problem.
  • Mentor engineers. Model high-quality code and thoughtful reviews.
  • Ship usable product. Measure impact. Iterate quickly.

What you'll bring

  • Senior to Staff-level experience building distributed systems at scale.
  • Strong technical depth across backend and either frontend or data.
  • Pragmatic problem solving. You know when to go simple and when to go deep.
  • A genuine interest in tech that helps people. I think that matters here.

Package and ways of working

  • Strong base salary plus equity
  • Hybrid, 3 days per week in the London office
  • 25 days annual leave, enhanced parental benefits, private healthcare
  • Sabbatical and volunteering leave
  • Tax-efficient pension and flexible benefits schemes

If you've been looking for a Principal or Senior Software Engineer role in London where you can build for scale and feel good about the outcome, let's talk. Drop me a message here or email your CV. Even if you're just curious, I'm happy to share the full brief and talk through fit.

Senior Software Engineer London, Staff Software Engineer, Principal Engineer, Fintech jobs London, Python, TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS, scalable systems, distributed systems, hybrid jobs London

hiring #softwareengineering #seniorsoftwareengineer #principalengineer #staffengineer #fintech #londonjobs #python #react #typescript #aws #postgresql #snowflake #careers

  • Staff Software Engineer

    6 days ago

    London Area, United Kingdom Burns Sheehan Full time

    Staff Software Engineer – THE AI Scale-Up of 2025 | Future UnicornUp to £160,000 plus excellent stock optionsLondon – 2 days a weekNext.js | React | Typescript | Node | PythonAre you a product-focused Staff Software Engineer who enjoys autonomy and wants to build products from end-to-end?If so, read on…Staff Software Engineer – We have been...

  • Staff Software Engineer

    1 day ago

    London Area, United Kingdom Switch Tech Talent Full time £100,000 - £120,000 per year

    Staff Software Engineer (Typescript/ Go) £100-120k + package incl. equityLondon hub - hybrid working (1/ 2 days pw) Typescript, Golang, Postgres, Kafka, Vercel, AWS etc.Does joining a near profitable B2B SaaS business, already working with global leaders in SaaS to improve efficiency and revenue interest you? How about joining as a Staff Software Engineer...

  • Staff Software Engineer

    22 hours ago

    London Area, United Kingdom Switch Tech Talent Full time £100,000 - £120,000 per year

    Staff Software Engineer (Frontend) £100-120k + package incl. equityLondon hub - hybrid working (2 days pw)React, , Typescript, Postgres, Kafka, Vercel, AWS etc.Does joining a near profitable AI start-up (B2B SaaS) already working with global leaders in SaaS to improve efficiency and revenue interest you? How about joining as a Staff Software Engineer...

  • Staff Software Engineer

    3 days ago

    London Area, United Kingdom Oliver Bernard Full time £60,000 - £120,000 per year

    Contract Software EngineerHealth-TechAngel, London | Hybrid, 3 days p/w£750 p/d Outside IR356-month contract (likely to extend)We are currently partnered with an innovative Health-Tech company, that leverage automation, robotics and data-driven insights to transform life sciences and healthcare delivery. They are offering an exciting opportunity for Staff...

  • Staff Software Engineer

    2 weeks ago

    London Area, United Kingdom Switch Tech Talent Full time

    💼 Staff Software Engineer (Frontend)💸 £100-120k + package incl. equity📍London hub - hybrid working (2 days pw)💻React, Next.js, Typescript, Postgres, Kafka, Vercel, AWS etc.Does joining a near profitable AI start-up (B2B SaaS) already working with global leaders in SaaS to improve efficiency and revenue interest you? How about joining as a Staff...

  • Staff Software Engineer

    2 weeks ago

    London Area, United Kingdom Switch Tech Talent Full time

    💼 Staff Software Engineer (Typescript/ Go)💸 £100-120k + package incl. equity📍London hub - hybrid working (1/ 2 days pw)💻 Typescript, Golang, Postgres, Kafka, Vercel, AWS etc.Does joining a near profitable B2B SaaS business, already working with global leaders in SaaS to improve efficiency and revenue interest you? How about joining as a Staff...

  • Java Full Stack Software Engineer

    4 days ago

    London Area, United Kingdom Redwood Software Full time £60,000 - £100,000 per year

    OUR MISSIONAt Redwood, we empower our customers with lights-out automation for their mission-critical business processes.ABOUT USRedwood Software is the leader in full stack automation fabric solutions for mission-critical business processes. With the first SaaS-based composable automation platform specifically built for ERP, we believe in the transformative...

  • Staff Software Engineer

    2 days ago

    London Area, United Kingdom Bounce Digital Full time £120,000 - £180,000 per year

    Role:Staff Software EngineerSalary/Package:£140k-£150k + 10% Bonus + RSUs (TC £250k+)Company Sector:SaaSExperience Level:15+ yearsTech:React.JS, Redux, , Golang, AWS, Elastic Search, Redis, MySQLLocation:Central LondonWFH / Hybrid:3 days a week on siteBounce continue to partner with one of our favourite customers as they look to achieve their ambitious...

  • Staff Software Engineer

    6 days ago

    London Area, United Kingdom Your Next Hire Full time

    Senior Software Engineer Salary: £120k or Contract Available Location: London twice a week We’re developing the next generation of automation infrastructure for the life sciences, bringing together robotics, data, and intelligent software to speed up drug discovery and deliver more reliable diagnostics.As part of our continued growth, we’re hiring a...

  • Senior Software Engineer

    6 days ago

    Manchester Area, United Kingdom IRIS Software Group Full time

    IRIS Software Group is a leading business software and services provider, one of the UK’s largest privately held software companies. We help organisations to make better business decisions by developing integrated software solutions to minimise admin, make business processes more efficient and give more time to do what’s valued. We started 45 years ago...