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Fullstack Software Engineer; Ruby on Rails​/React

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Pennylane
Full Time position
Listed on 2026-02-28
Job specializations:
  • Software Development
    Software Engineer, Full Stack Developer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 GBP Yearly GBP 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Position: Fullstack Software Engineer (Ruby on Rails / React)
Location: Greater London

Are you looking to have an impact on the daily life of millions of entrepreneurs in France (and tomorrow in Europe)?

Are you looking for a work environment that values trust, proactivity, and autonomy?

Are our Engineering principles aligned with your vision?

Then Pennylane is the right place for you !

Our vision

We aim to become the most beloved financial Operating System of French SMEs (and soon, European ones).

We help entrepreneurs rid themselves of time‑consuming tasks related to accounting and finance while providing them with access to key financial information to assist in making the best decisions for their business.

Simultaneously, we support accounting firms by enabling them to spend less time on redundant and repetitive tasks and more time on advising and supporting their clients. Already, over 200,000 small and medium‑size enterprises (SMEs) and more than 3,500 accounting firms use Pennylane in France! 🚀

About us

Pennylane is one of the fastest growing Fintechs in France (and soon to be in Europe!)

In 4 years of existence, we’ve managed to :

💻 Make ourselves known as a groundbreaking accounting and financial software for small businesses and their accountants

💰 Raise a total of €220 million, including from Sequoia, the famous fund from the Silicon Valley who invested early in companies like Google, Facebook, Airbnb, Stripe, Paypal and much more...

👨👩👧👦 Grow from 7 cofounders to 850+ happy Pennylaners : we’re now recognized as one of the greatest places to work in France (and also remotely), with a 4.6/5 rating on Glassdoor.

🌍 Build an international environment with more than 25 nationalities, with a strong remote‑friendly culture, where 30% of the employees are already working from all parts of Europe

🤝 Earn the trust of thousands of customers and accounting firms and obtain outstanding ratings

🚀Already more than 650,000 small and medium‑size enterprises (SMEs) and over 6,500 accounting firms use Pennylane in France!

WHAT you can expect from your life at Pennylane ?
  • Within one month :
  • You will learn everything about our company, our teams, and our vision during the first onboarding week.
  • You will follow a tech onboarding training to get familiar with the application, the accounting concepts, the code stack (we use Rails, React, Typescript, ES6, Jest, AWS) and the CI/CD.
  • You are integrated in your squad and explained your squad scope, roles and responsibilities.
  • You will have a “tech buddy”, basically a more senior software engineer, helping you on a daily basis with all the technical details you need to know as of software engineer.
  • You will start working on what we call “good first issues” to get familiar with the dev environment, the code structure, the tools and the squad scopes.
  • Within 3-6 months :
  • You will be comfortable within your squad perimeter, people and best practices.
  • You will have participated on building and shipping features to production.
  • Thanks to your unique personality you will start bring value and new ideas to the squad.
  • And beyond :
  • The teams are growing fast, there are plenty of opportunity to grow and develop your skills as a software engineer.
  • You will be able to take ownership and gain responsibilities on some features or projects the squad is responsible for.
  • You will have the possibility to have impact at Pennylane scale by working on cross teams or transversal initiatives.
  • You will participate in scaling the Pennylane application from 30k+ customers to millions customers.
🥇 You’re the right candidate if you…
  • Have experience with Ruby on Rails and React (at least 4 years)
  • Have a balanced blend of technical, business, and product skills.
  • Are a team player and have experience working in an agile environment
  • Like being challenged and solving complex problems (accounting is complex in Europe)
  • Show empathy for your users and want to solve real issues for them
  • Have strong communication skills and are capable of articulating your ideas clearly
🎁 What we offer
  • 🏢 You'll be able to work remotely from your country of residence, as long as it is in Europe and within a maximum time difference of two hours from the CET time zone
  • 🌴 Wherever you are based, you will get 30 vacations days paid by Pennylane
  • 💵…
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