Fullstack Software Engineer RoR/JS W/M

Our vision

We aim to become the most beloved financial Operating System of French SMEs and Accounting Firms (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.

About us

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

In 5 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 €400 million, including from Sequoia, the famous fund from Silicon Valley who invested early in companies like Google, Facebook, Airbnb, Stripe, Paypal and many more
• Grow from 7 cofounders to 1000 employees and become recognized as one of the greatest places to work in France, 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 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 900,000 small and medium‑sized enterprises and over 6000 accounting firms use Pennylane in France

Your mission

You will join our Growth Team and work collaboratively with the growth engineer team lead within the Marketing website squad.

We are looking for a talented full stack software engineer whose main mission will be to :

• Global Scaling: Build and refine the infrastructure supporting our internationalization (multi‑language, localized user journeys).
• Intelligent Automation: Design and deploy AI‑driven tools and automated workflows to streamline lead acquisition and personalize user experiences at scale.
• Tracking & Insights: Implement and enhance sophisticated visitor tracking systems to turn raw data into actionable growth levers.
• Ecosystem Connectivity: Design and develop robust APIs to ensure seamless data flow between our internal tools and the broader fintech ecosystem.
• High‑Velocity Experimentation: Launch needle‑moving projects including A/B tests, white‑label integrations, predictive lead scoring, and optimized acquisition funnels.
• Performance Optimization: Maintain and push the limits of our public website and registration funnels for peak conversion across all markets.

Who are we looking for?

• Experience: At least 2+ years of professional experience as a Software Engineer.
• Tech Stack: Mastery of Ruby on Rails. Proficiency in a JS Framework (Vue/Nuxt) is a major plus.
• Efficiency Obsession: You know how to leverage AI tools (LLMs, Copilots, etc.) and automation to move faster and smarter than the average dev.
• Communication: Fluent in French & English (B2/C1). German is a bonus.
• Adaptability: You are energized by an ever‑shifting startup environment and love collaborating with diverse stakeholders (Data, Sales, Marketing).

The technologies we use in the Growth Engineering team

• Rails / Javascript
• Vue JS + Nuxt JS
• PostgreSQL
• Git / GitHub

Ideally you’ve already got some knowledge with data tools including data tools integration (GTM, Segment) or data visualization (Datastudio, Looker) and you’re familiar with digital marketing (paid acquisition, conversion, SEO).

What we do to make your work life easier

• 25 vacation days paid by Pennylane.
• Competitive compensation package.
• Company shares to enjoy a piece of the success story you’re building with us.
• A budget to turn your home into a comfortable workspace, as well as a monthly allowance to work from a coworking space whenever you feel like it.
• Through our partner Gymlib, you’ll have access to 8,000 fitness spaces in Europe and more than 300 activities related to wellness.
• You’ll have access to Busuu to perfect your English or your French.
• You’ll get the latest Apple equipment.
• Depending on the teams and the requirements of the position 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.
• We are committed to regularly coming together for company events such as Tech Days (which bring remote Pennylane employees together every 3 months) or our annual company seminar, fostering significant moments of cohesion for everyone.
• If you are based in France, you will have a French contract following French regulation on top of the additional perks: 6 to 12 RTT, 5 weeks PTOs, lunch credits (Swile), Alan Blue healthcare cover and regular events in cities where Pennylane employees are mostly present (Lyon, Bordeaux, Nantes).

We fully embrace diversity, equity and inclusion and we’re doing our best to create a safe and inclusive environment.

We are committed to providing an equal employment opportunity regardless of gender, sexual orientation, origin, disabilities, or any other traits that make you who you are.

Personal Data Pennylane processes your data to manage your application and assess your suitability for the position. If your application is unsuccessful, your data may be retained for 2 years from our last exchange or the closing of the recruitment process, in order to build and manage a candidate pool. You may object at any time and request the deletion of your data by writing to .