Senior Software Engineer (Rails)

At Finary, our mission is to change how money can work for you. We are building a one-stop shop for investing that gives powers back to investors. Finary allows its users to track their assets, manage their budgets, invest their money, and learn more about finance. If you’re looking for an ambitious team that’s revolutionizing an old-fashioned industry, get in touch!

Mounir launched Finary in 2021. Since then, Finary has made great strides by reaching 600.000 users. We genuinely care about user experience, performance, and ease of use. We ship cutting-edge products with touches of delight. You'll join a winning team, learn insanely, earn life-changing money, and work with other A+ players.

A new generation of investors is emerging: an ambitious, involved workforce. Money is no longer taboo and the pension system is under tremendous pressure. At Finary, we see a world where investing empowers everybody to live the life they’ve always dreamt of. Finary exists to revolutionize the personal money management experience.

To fuel this mission, we announced in September 2025 a 25M€ series B, backed by leading investors including PayPal Ventures, Hedosophia, Y Combinator and Speedinvest. We are also backed by world-class founders like Steve Anavi & Alexandre Prot (Qonto founders), Matthieu Rouif (Photoroom), Eric Demuth (CEO of Bitpanda), Axel Weber (former Chairman of UBS and President of the German Central Bank) and Harsh Sinha (CTO at Wise).

There’s never been a more exciting time to join Finary!

At Finary, you’ll join a team of top performers driven by excellence, ambition, and a shared mission to reinvent personal finance. We move fast, aim high, and value ownership above all. Our culture is demanding, transparent, and deeply collaborative. It’s not for everyone — but if you’re looking to raise the bar every day with equally driven teammates, this is the place to be.

Read more about our values here.

• A high-performing team - Work with A-players across every discipline in an environment that challenges you and helps you grow fast.

• Ownership - You’ll have freedom, responsibility, and trust from day one. We hire people for their talent, and we get out of their way.

• Impact that matters - Build a product that helps people take control of their financial future - a topic that affects everyone.

• A hybrid setup - We’re a hybrid setup company with teammates across France. We meet in person every 6 weeks in Paris.

• Competitive compensation - A package aligned with your experience and impact.

• Your degree, your school - we care about what you bring to the team.

• Ping pong tables, free laundry, or trendy perks - we focus on what truly matters.

At Finary, we live and breathe Product and Engineering, we build delightful experiences that significantly improve the financial well-being of our users while moving at high speed.

For that, we break complex problems down into small items, ship, and iterate constantly. Our community loves that and provides us with valuable feedback as we polish Finary.

We believe the best products are a healthy mix of user research, analytics, and gut feeling. Talking to users & digging into analytics is part of our DNA. We don’t shy away from making bold bets and venturing into new unexplored territories.

Our engineering team is dedicated to making this ambition real. We build resilient, scalable, world-class technology while staying pragmatic and focused on efficient shipping.

• Web: React,

• Mobile: React Native, Expo

• Backend: Rust, Ruby, Python

• Database: PostgreSQL

• Infrastructure: GCP, Terraform

• Ops: GitHub, Datadog, Sentry

We're looking for a highly experienced backend software engineer to work on our most popular product: the portfolio tracker.

Your role will be to work on the Ruby on Rails backend stack :

• design & implement scalable, efficient backend solutions and API's, ensuring high performance and reliability across our platform.

• provide technical guidance to less experienced developers, fostering a collaborative environment that promotes learning and professional growth.

• identify areas for improvement in the backend codebase, refactoring, and optimizing for better performance and maintainability.

• engage closely with frontend, design, and product teams to ensure that backend solutions align with overall product goals and user needs.

• ensure that backend infrastructure is scalable and optimized for performance, security, and cost-efficiency.

• set up automated testing, monitoring, and alert systems to ensure backend stability and swift resolution of issues.

• proven expertise in Ruby on Rails

• 5+ years in a backend role in product-driven organizations

• strong problem-solving skills and the ability to diagnose and resolve complex technical issues.

• experience in architecting scalable systems and optimizing performance.

• excellent communication skills, with the ability to collaborate effectively with cross-functional teams.

• a commitment to continuous learning and embracing change.

• adaptability to thrive in a fast-paced, ever-evolving environment.

• like to take initiative and find new creative solutions to problems

• are fluent in English (written and spoken)

• are comfortable with product analytics (Amplitude is a plus)

• are passionate about personal finance

• have an excellent eye for aesthetics

Tell us why you want to join Finary. Share with us what excites you about our mission and how you will contribute. Make your first impression count.