React Native Developer

In4Matic; Brussel; On-site; EUR 90,000 - 130,000; Full time

Job summary

In4Matic in Belgium seeks an experienced Senior React Native Developer to design and build scalable mobile apps for iOS and Android, across the full lifecycle from design to release.

You'll work with multidisciplinary teams, mentor junior developers, and help shape technical direction, architecture, performance, and CI/CD practices in an Agile environment.

Candidates should have 10+ years of software development, strong React Native, and experience in public transport and e‑commerce domains.

Qualifications

• 10+ years of professional software development with React Native.
• Proven track record building scalable, high‑performance mobile apps.
• 3+ years in Belgian public transport domain.
• 3+ years in e‑commerce applications.
• Strong understanding of mobile architecture, API integration, and performance optimization.
• Experience with state management tools and CI/CD practices.
• Fluent English communication (C1) for multidisciplinary collaboration.

Responsibilities

• Design, develop, and maintain cross‑platform mobile apps using React Native.
• Build reusable, scalable, maintainable components for iOS and Android.
• Translate requirements into robust technical solutions and APIs.
• Collaborate with backend teams on API contracts and integration challenges.
• Implement and maintain state management with Redux/ContextAPI/Zustand.
• Optimize performance, memory usage, and startup times.
• Troubleshoot complex issues and contribute to coding standards.
• Support releases to App Store and Google Play Store.
• Mentor junior developers and share knowledge within the team.
• Participate in Agile/Scrum processes and continuous improvement.

Skills

React Native

Mobile architecture

API integration

CI/CD tooling

Agile/Scrum

Git

Problem solving

Collaboration

English (C1)

Education

Master's degree in Computer Science or related

Equivalent professional experience

Tools

GitHub Actions

Azure DevOps

Jenkins

Redux

Redux Toolkit

Context API

Zustand

Job description

We're looking for an experienced Senior React Native Developer to join our client's team and contribute to the development of scalable, high-performance mobile applications. You'll work across the full application lifecycle, from technical design and development to testing, optimisation, and release. This opportunity is particularly suited to a senior mobile specialist with experience in both public transport and e-commerce environments, who enjoys solving complex technical challenges and working closely with multidisciplinary teams.

Role & Responsibilities

You’ll take ownership of delivering reliable cross‑platform mobile solutions for iOS and Android while contributing to technical direction and development standards. Your responsibilities will include:

• Design, develop, and maintain high-quality cross‑platform mobile applications using React Native.
• Build reusable, scalable, maintainable, and well‑tested components for iOS and Android.
• Translate business and functional requirements into robust technical solutions.
• Integrate RESTful APIs and third‑party services and collaborate with backend teams on API contracts and integration challenges.
• Implement and maintain state management using technologies such as Redux, Redux Toolkit, Context API, or Zustand.
• Optimise application performance, responsiveness, memory consumption, and startup times.
• Troubleshoot and resolve complex technical issues across iOS and Android.
• Participate in code reviews and contribute to coding standards, best practices, and architectural decisions.
• Support application releases and deployments through the Apple App Store and Google Play Store.
• Work closely with product managers, business analysts, UI/UX designers, backend developers, QA engineers, and other stakeholders.
• Mentor less experienced developers and contribute to knowledge sharing within the team.
• Participate in an Agile/Scrum development environment and contribute to continuous improvement.

Technical Profile

The ideal candidate combines deep React Native expertise with broad software development experience and a strong understanding of mobile application architecture. You should have:

• 10+ years of professional software development experience, with strong hands‑on expertise in React Native.
• Proven experience building scalable and high‑performance mobile applications.
• At least 3 years of experience working within the Belgian public transport domain.
• At least 3 years of experience developing and/or maintaining e‑commerce applications.
• Strong understanding of mobile application architecture, API integration, performance optimisation, and end‑to‑end development.
• Experience with state management solutions such as Redux, Redux Toolkit, Context API, or Zustand.
• At least 5 years of experience working in an Agile/Scrum development environment.
• At least 5 years of experience with CI/CD tooling such as GitHub Actions, Azure DevOps, or Jenkins.
• Strong experience with Git and modern software development practices.
• Experience contributing to technical design, architecture, code reviews, and development standards.
• A Master's degree in Computer Science, Software Engineering, Information Technology, or a related discipline, or equivalent professional experience.
• Strong problem‑solving skills, autonomy, and a proactive approach to development.
• Excellent collaboration and communication skills.

Languages

You communicate fluently in English, both spoken and written, at a minimum C1 level. Experience working with multidisciplinary teams and translating business requirements into clear, reliable technical solutions is essential for this role.

Contactperson & Reference

• Reference #: INW28315
• Pieter Messely
• [e-mail]