Senior Mobile App Developer

4ps-; Ede; Hybrid; EUR 70,000 - 90,000; Full time

Benefits offered by this job

Year-end bonus

Remote work options

Home office allowance

28 vacation days

4PS Academy training

Great Place to Work certification

Job summary

4PS, part of the Hilti Group, is seeking a Senior Mobile Apps Developer to design, build and improve mobile apps for Android and iOS. You’ll lead technical decisions within a Scrum team, ensuring scalability, performance and security while collaborating with product, UX/UI and other stakeholders.

You will own complex features end-to-end, mentor junior developers, and integrate APIs. The role offers a competitive salary, hybrid work from our Ede office, and growth opportunities with both national

Qualifications

• 5+ years of mobile development experience.
• Strong proficiency in .NET Core / .NET 6+.
• Experience with ASP.NET Core REST APIs and backend services.
• Experience with .NET MAUI or Xamarin for mobile apps.
• Proven track record in Android and/or iOS development.
• Git proficiency and code review practices.

Responsibilities

• Define and safeguard the mobile app architecture.
• Develop and maintain scalable mobile solutions.
• Choose frameworks, tooling and tech wisely.
• Own end-to-end features and projects.
• Integrate APIs and external services.
• Ensure quality, security, and maintainability of code.
• Set up and improve CI/CD processes.
• Mentor junior/mid developers and coach team members.
• Act as technical point of contact for stakeholders.
• Identify risks and propose mitigations.

Skills

Mobile development

REST APIs

Agile/Scrum

Git

Software design principles

Tools

.NET Core/.NET 6+

ASP.NET Core

.NET MAUI / Xamarin

Azure DevOps

CI/CD pipelines (YAML)

Job description

Who are we?

4PS offers a comprehensive portfolio of ERP solutions based on Microsoft Dynamics Business Central, including related portals and apps, for companies in the construction industry. With over 400 professionals, we work every day on applications that make a real difference for our 450 customers worldwide.

Within our development teams, you will work alongside experienced and highly capable colleagues. We have a mature team with a strong mix of senior, medior, and specialized profiles. This means that as a senior you will not only provide direction but also engage in meaningful discussions at a high level and collaborate with peers who are used to taking ownership and delivering quality.

We are passionate and take pride in delivering results. As a team, we support and inspire each other, share knowledge, and grow professionally. In addition to working hard, we highly value enjoyment. We foster this by organizing regular social activities and maintaining a relaxed work environment. 4PS Group is now part of the Hilti Group. Together, we are working towards the mission: “Making Construction Better”.

What will you do?

As a Senior Mobile Apps Developer, you play a key role within the development team. You are responsible for designing, building, and continuously improving mobile applications for Android and iOS, ensuring they are scalable, high-performing, and future-proof.

You are involved in the full software development lifecycle and take the lead in technical decision-making. You ensure quality, security, and maintainability, while actively contributing to continuous improvement of processes and ways of working.

You work in a multidisciplinary Scrum team and act as a sparring partner for product managers, UX/UI designers, and other stakeholders. You take ownership of complex features and contribute to a strong team dynamic through knowledge sharing and coaching.

Your key responsibilities

• Defining and safeguarding the technical architecture of mobile applications
• Designing, developing, and maintaining scalable mobile solutions
• Making well-founded choices in frameworks, tooling, and technologies
• Taking end-to-end ownership of complex features and projects
• Integrating APIs and external services
• Ensuring code quality, performance, security, and maintainability
• Setting up and improving CI/CD processes and automation
• Coaching and mentoring junior and mid-level developers
• Acting as the technical point of contact for stakeholders
• Identifying risks and proactively proposing solutions

How do you work?

You are part of a Scrum team and collaborate closely with Product Management, UX/UI, and other development teams. You actively participate in Agile/Scrum processes and contribute to effective collaboration and continuous improvement.

You translate functional requirements into robust technical solutions, considering user experience, performance, and various scenarios such as offline and online usage.

What do you bring?

• At least 5+ years of experience as a Software Developer, including several years in mobile development
• At least 5 years of experience with .NET (preferably .NET Core / .NET 6+);
• Experience with ASP.NET Core (developing REST APIs and backend services);
• Experience with .NET MAUI or similar mobile frameworks (e.g. Xamarin);
• Proven experience in mobile app development (Android and/or iOS);
• Strong experience with Git (branching, pull requests, code reviews);
• Strong knowledge of software design principles (SOLID, DRY, Clean Code) Proven ability to build maintainable and testable software;
• Strong analytical and problem-solving skills;
• Affinity with mobile app development (UX, performance, offline/online scenarios);
• Ownership mindset and end-to-end responsibility for quality and delivery;
• Experience working in Agile/Scrum teams.

Nice to have

• Experience with CI/CD (e.g. YAML pipelines)
• Experience with Azure DevOps (Boards, Repos, Pipelines)
• Experience with test automation (UI testing such as Appium and API/integration testing)
• Experience with Azure or other cloud environments
• Experience with monitoring and logging (e.g. Application Insights)
• Knowledge of performance optimization (mobile and backend)
• Experience with AI tools in development (e.g. Copilot, AI-assisted testing)

Who are you?

You enjoy working independently and take strong ownership of your work and results. You have a clear and well-developed technical vision, which you are able to communicate effectively and convincingly to others. At the same time, you thrive in a collaborative environment, contribute actively to teamwork, and see yourself as a true team player.

What can you expect from us?

• An excellent salary with a year-end bonus;
• Working with high-end and the latest software from Microsoft and other vendors;
• A great workplace at our office in Ede, with all facilities to support your work;
• Flexibility in working hours and location, including remote work and a home office allowance;
• 28 vacation days based on full-time employment, with the option to purchase additional days;
• An ambitious and highly skilled team with experienced colleagues
• Increasing focus on AI and process optimization;
• Work that has a direct impact on customers and the industry;
• A role within an organization with strong national and international ambitions;
• A position where you can make an impact, with a high level of autonomy, independence, and responsibility;
• A certified Great Place to Work, recognized by our own colleagues;
• 4PS Academy – the place for internal and external training;
• 4PS Life – focused on a healthy and enjoyable work-life balance (e.g. LAN parties, social drinks, fresh fruit, periodic health checks, and company events).