React Frontend engineer

Job description

🚀 Role: React Frontend engineer (Medior/Senior)

📍 Location: Lisbon (Hybrid)

📅 Start Date: January 2026

💰 Salary: Competitive with benefits

Why Are We Hiring? 

As we continue to scale our expense management platform, we are looking for a talented Software Engineer to join our fast-paced and international engineering team. You will play a key role in modernizing one of our main products, through AI. This role is ideal for someone with a strong technical foundation who thrives in a collaborative and agile environment and loves to explore AI technology.

💥 What Will You Do: 

• Designing, developing, and maintaining front end React applications, connecting to a .NET 8.0 backend, as part of an agile development team.

• Design scalable systems and write robust, maintainable code following best practices for software development.

• Contribute to architectural decisions and codebase improvements.

• Heavily rely on AI to quickly iterate and develop frontend solutions.

• Ensure quality via unit testing, code reviews, and continuous integration.

• Work closely with product managers and designers to bring product vision to life.

• Participate in regular sprints and collaborate cross-functionally with Backend Engineers, QA, DevOps, Support and Product teams.

Job requirements

🧩 About You: 

Bachelor’s degree in Computer Science, Engineering, or equivalent experience.

2-3 years of experience in frontend React development.

A team player with strong problem-solving skills and attention to detail.

🛠️ Tools Proficiency:

• Solid experience developing React based frontends.

• Experience with companywide design systems, both in using them in your everyday development and also contributing to their development.

• Experience in interacting with RESTful APIs

• Attention to testing, namely experience using Jest for unit test.

• Experience with React design patterns, State management, consuming RESTful APIs

  Nice to have:

• Experience in the fintech industry (or similar) is a plus.

• Familiar with Git, CI/CD pipelines

• Knowledge of .NET 8.0 (this is a frontend position, but you’ll be interacting with a .NET 8 backend)

🤖 Analytical skills and AI proficiency: all team members are expected to demonstrate strong analytical capabilities and make smart use of AI tools, whatever helps them work smarter and drive results in their role.

🌍 Language Skills: fluent English, any other language is a plus

Why Join Mobilexpense?

We’re not a giant enterprise. We’re a growing B2B SaaS scale-up with 3,000+ customers and big ambitions. Here, you’ll be empowered to build, test, and own your growth engine—without red tape or layers of approvals.

• Work with a diverse, international team (27 nationalities, 47% female representation)

• Direct access to leadership, flat structure, high transparency

• Offices in Belgium, Netherlands, Germany, Sweden, Portugal, and Romania

• A clear mission: make life easier for finance teams, HR, and employees across Europe

All done!

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