At Ageras, we are redefining how entrepreneurs—freelancers, self-employed professionals, and SMEs—manage their banking, and administrative tasks. Through seamless tools and innovative accounting & 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 500 people, including 150 talented engineers, working together from Paris, Amsterdam, Copenhagen, and Berlin.

👀 The Invoicing Success team at Ageras

Our Invoicing Success team is on a mission to deliver seamless, intuitive invoicing experiences that empower small entrepreneurs to manage their finances efficiently.

We are an ambitious and growing tech team focused on delivering cutting-edge mobile and web applications. Our current focus is evolving towards strengthening our React Native stack, aiming to launch a unified platform with several new apps by the end of the year. As part of this evolution, we’re seeking a Senior Mobile Engineer (React Native) to bring fresh perspectives, strong technical leadership, and a passion for high-quality mobile development.

📋 Your role as a Mobile Engineer (React Native)

We’re looking for a Mobile Engineer (React Native) to join our growing and evolving team. As we shift focus toward developing a more robust React Native stack, your contributions will directly shape the future of our mobile platform. We're preparing for an ambitious second half of the year with a unified stack rollout and multiple new app launches.

You’ll be joining a small, supportive team with strong autonomy and shared ownership. While the focus is on mobile, fullstack knowledge is highly valued, and web contributions may also be part of the role.

Your responsibilities will include:

• Build and deliver mobile features with fast, testable iterations
• Own and lead technical projects — from planning to delivery
• Support and mentor other developers, promoting a culture of learning
• Collaborate with Engineering Manager, Product Manager, and Product Designer to drive the best possible solutions
• Maintain and evolve our React Native stack (with Expo), including performance, migrations, and architecture improvements
• Implement and ship features in multi-contributor applications
• Manage app releases and publishing workflows
• Contribute to discussions around tech improvements, tooling, and processes
• Take part in PR reviews, pairing, and regular team check-ins

🔎 About you

• 5+ years of professional experience with:
  • React Native and React
  • Node.js, TypeScript
  • REST, GraphQL, or RPC APIs
  • Microservices
  • Cloud infrastructure (AWS, GCP, or similar)
  • CI/CD, testing, monitoring, and release management
  • Expo, component optimization, and design systems
• Ability to contribute across mobile and web platforms
• Fluent in English (written and spoken)

Nice-to-Have:

• Experience with deployment tooling and build optimization
• Background in mentoring or team leadership
• Familiarity with multi-contributor environments and shared app ownership

Soft skills that make you shine:

• Excellent communication and a strong sense of ownership
• Proactive mindset
• 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:

• After 3 months: You’re recognized by the team for your expertise, and your teammates feel confident and comfortable working with you.
• After 6 months: You’re a key contributor to the team’s success, raising the bar on quality and expectations across the board.

🎁 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

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

📅 Start Date: Preferably Asap but flexible
📍Job located in Paris, Berlin, Copenhagen or Gdansk office with possibility of two remote working days per week

💚 Our recruitment process

1️⃣ Initial screening with our recruitment spetialist.

2️⃣ Personal chemistry check and online tech experience evaluation to validate your expertise.

3️⃣ Personality assessment and soft skills interview to see how we can best support your growth at Ageras.

4️⃣ Meet key team members.