Senior Fullstack developer with mobile experience

At Ageras, we are redefining how entrepreneurs—freelancers, self-employed professionals, and SMEs—manage their banking and administrative tasks. Through seamless tools and innovative banking solutions, we help them focus on what matters most: Growing their businesses.

Our vision is to become the best friend of every small entrepreneur across Europe. 💚

Over the years, Ageras has grown through the merging of top European FinTechs like Shine (🇫🇷), Kontist (🇩🇪), Tellow (🇳🇱), and more. Today, we’re a team of nearly 450 people across Europe.

👀 What does success look like in this role?

Our Invoicing Success team is on a mission to deliver seamless, intuitive invoicing experiences that empower small entrepreneurs to manage their finances efficiently. The team is tight-knit, experienced, and supportive—with members in Paris, Lyon, and remote locations, working collaboratively in a high-autonomy environment.

We’re now looking for a Senior Fullstack Developer (with React Native Focus) to join us in this journey, helping us shape the mobile experience and support our web efforts in the invoicing domain.

📋 Your Role as a Senior Fullstack Developer

You’ll join a cross-functional team, working alongside engineers, designers, and product managers to build, maintain, and enhance our mobile and web applications.

What you’ll do:

• Develop and deliver features across mobile (React Native) and web platforms.
• Take ownership of the mobile development stack, including app setup, development, publishing, and release management.
• Collaborate with frontend and backend developers, designers, and product managers to ship high-impact solutions.
• Drive technical discussions, make architectural decisions, and ensure code quality through best practices.
• Help lead and mentor other developers, sharing knowledge and elevating the team.
• Interface with various APIs and contribute to microservices where needed.

🔎 About You

Must-have skills:

• Fullstack experience in a TypeScript/Node.js environment.
• Preferably 5+ years minimum in software development
• Significant experience with mobile development is essential.
• Strong experience with React Native and a keen interest in web development.
• Hands-on knowledge of mobile app lifecycles: from setup to release and store publication.
• Experience working with various APIs and infrastructures
• Experience in the implementation of scalable services and architectures
• Implementation of unit and E2E tests
• Solid experience with Expo or willingness to learn it quickly.
• Fluent in written and spoken English

Nice to have:

• Experience with microservices, CI/CD, and system design.
• Adaptive communication style and constructive challenger

Soft skills that make you shine:

• Excellent communication and a strong sense of ownership.
• Proactive mindset—you don’t just execute, you propose and lead.
• Focused on product impact and user experience.
• Comfortable in fast-paced, evolving environments.
• Team player with a problem-solving attitude.

🚀 If you’re the right person, here’s what success looks like:

• 3 months: Fully onboarded, contributing meaningfully, and driving mobile initiatives.
• 6 months: Lead successful delivery of key mobile features, co-owning mobile development in the invoicing domain.

🎁 What We Offer

Hands-on experience in an international, fast-growing fintech

A young, motivated team in the structuring phase – you’ll make a real impact!

Flexible working hours

Delicious lunch and office snacks everyday

A fun and social office environment in the heart of Paris (snacks, lunch, and great colleagues included!)

📅 Start Date: Preferably Asap but flexible

💚 Our recruitment process

1. Initial screening with our recruitment lead.
2. Personal chemistry check and tech experience evaluation to validate your expertise.
3. Business case to showcase your mobile development experience and product-thinking skills.
4. Personality assessment + Meet key team members to explore culture fit.

💡 Interested?

🚀 Apply now with your CV and a short cover letter! Let’s shape the future of fintech together.