Senior Full Stack Engineer (Javascript)

atominvest
London

Who is Atominvest

Atominvest is the operating system for modern private markets asset managers. Our modular, flexible SaaS technology underpins key investor- and portfolio-management workflows.

Our customers are sophisticated private equity, growth equity, and private credit firms managing billions in assets globally. We aim to deliver ongoing high-quality outcomes for them through a long-term partnership mindset.

At Atominvest, you’ll be working on something very exciting: the future of work, investments and sustainability/ ethical investing for the world’s best investors and delivering a positive impact through this. Based on the growth we are experiencing, we think we’re on to something big.

It won’t be easy. Joining a scale up business is an amazing and rewarding challenge, pushing well beyond the boundaries of natural growth cycles. You’ll move quicker than feels comfortable and be brilliant at continually re-prioritizing what must get done to keep Atominvest growing year over year at the pace of the best SaaS companies on the planet.

We’ve gone from zero to ten, now we’re looking to go from ten to one hundred!

The role:

We are looking for a full-stack software developer to take the lead in working across optimizing and building the next set of features across our award-winning web platform.

We are looking for a highly motivated person with a hands-on approach looking to join the fast-paced world within a fintech software start-up.

You will have to be comfortable moving quickly and accurately, and be brilliant at continually re-prioritizing what must be done to keep Atominvest growing at pace.

You'll work with closely with the engineering and product teams to build and optimize our web-based software platform.

We know that you can achieve great things, so we take a meritocratic approach to progression.

What you’ll be doing:

  1. Build performant, beautiful, and scalable features and services that delight our end users

  2. Optimizing existing features and performance of our software platform

  3. Solving complex problems in a logical an efficient manner

  4. Taking a practical approach to prioritize engineering effort towards solving new engineering challenges

  5. Identify opportunities for adopting new technologies and patterns

  6. Lead, manage and mentor junior members of the team and help develop technical talent at Atominvest

  7. Help attract, interview, and onboard your future team members during this exciting time of growth

If this sounds like what you’d love to be doing, we can’t wait to hear from you.

The must-haves:

  • 4-7 years+ experience in web development and deep proficiency across the following technologies

    • ReactJS

    • NodeJS

    • AWS

    • MongoDB

    • HTML, CSS/LESS/SASS

    • Git / CICD

  • A passion for maintainable, readable, stable, secure, and scalable code

  • Track record of shipping high quality SaaS products and features at scale

  • An ability to think through client needs and incorporate end-user feedback

  • Strong UI/UX instincts and an eye for visual design

  • Understanding of client-side performance, including rendering optimizations, memory management, and state management

  • Positive attitude, sense of humor and creativity

  • Strong analytical, project leadership and communication skills

  • Team leadership and management skills

You should have a strong interest in web-based software development and additional experience in the financial services technology/ asset management space would be a bonus.

Posted 2026-07-06

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