Or Permanent Senior Full-stack and Mobile Developer - Technical Lead (Freelance possible)

EngiFlex; Brussel Hoofdstad; On-site; EUR 70,000 - 95,000; Full time

Benefits offered by this job

Company car

Career plan with education budget

Job summary

EngiFlex in Belgium is seeking an experienced Senior Full-stack and Mobile Developer with strong technical leadership to guide multi-team efforts. The role covers backend, frontend, mobile development and DevOps; you will own architecture and ensure quality across projects.

You should have 8+ years in software development, with hands-on experience in C#, .NET, React Native and cloud/Kubernetes environments. Freelance possible; attractive salary and benefits offered.

Qualifications

• 8+ years of software development experience.
• Experience across backend, frontend, mobile and DevOps.
• Ability to own technical architecture and guide teammates.
• Proven track record delivering complex software.

Responsibilities

• Define and maintain the technical architecture of software solutions with focus on scalability, security, performance.
• Translate business requirements into robust technical designs and select technologies.
• Contribute to software development, especially for complex components.
• Ensure code quality via reviews, standards and best practices.
• Provide technical guidance and support knowledge sharing.
• Identify risks, dependencies and debt, driving solutions.
• Work with heads of service and project managers to enable delivery.
• Participate in design, development, testing and delivery within cross-functional teams.
• Develop and maintain mobile applications; support testing, release and deployment.

Skills

Full-stack development

C#, .NET Framework/Core

Mobile development (React Native)

DevOps & containerization

REST APIs

Unit testing

Technical leadership

Code reviews & architecture

English communication

French or Dutch language skills

Tools

Microsoft Azure DevOps

Git

Docker

Kubernetes

React Native / Expo

NUnit / xUnit

IdentityServer / OpenID Connect

ASP.NET Core / Web API

Entity Framework

Job description

or Permanent Senior Full-stack and Mobile Developer - Technical Lead (Freelance possible)

Job Openings or Permanent Senior Full-stack and Mobile Developer - Technical Lead (Freelance possible)

About the job or Permanent Senior Full-stack and Mobile Developer - Technical Lead (Freelance possible)

Tasks and responsibilities

The IT development team is looking for an experienced full-stack and mobile developer with strong technical expertise and at least 8 years of experience in software development.

In this role, you will:

• Define and maintain the technical architecture of software solutions, with attention to scalability, security, performance and maintainability.
• Translate business requirements into robust technical designs and select suitable technologies.
• Contribute directly to software development, especially for complex or critical components.
• Safeguard code quality and architectural consistency through code reviews, technical standards and established best practices.
• Provide technical guidance to developers, support knowledge sharing and contribute to continuous improvement.
• Identify technical risks, dependencies and technical debt, and drive appropriate solutions.
• Work with the head of service and project managers to support successful project delivery.
• Participate actively in project teams across software design, development, testing and delivery.
• Develop and maintain mobile applications.
• Contribute to the testing, release and deployment of mobile applications on Google Play and the Apple App Store.

You have experience as an established full-stack developer and can take technical ownership while guiding colleagues. You have at least 8 years of experience in software development and are comfortable working across backend, frontend, mobile development and DevOps.

Technical skills

• Object-oriented programming, design patterns and n-tier architecture.
• Backend development with C#, .NET Framework 4.0, 4.5 and 4.8, .NET Core, .NET 10, ASP.NET Core, ASP.NET Core Web API, ASP.NET MVC and Entity Framework.
• Databases and query languages, including Microsoft SQL Server and T-SQL.
• DevOps and containerisation with Microsoft Azure DevOps, Git, Docker and Kubernetes.
• Mobile development with React Native and Expo, including deployment to Google Play and the Apple App Store.
• Unit testing with NUnit and xUnit.
• IdentityServer, OpenID Connect and security for web applications.
• REST API services.
• Technical leadership and the ability to guide and advise colleagues.
• Clear communication and the ability to explain technical concepts and standards.
• Strong collaboration skills when working with developers, project managers and designers.
• A proactive and accountable approach to identifying risks and taking responsibility.
• Willingness to learn new technologies and continuously improve technical skills.
• Ability to share expertise and contribute to knowledge sharing.

Languages

• French or Dutch, with professional reading, writing and speaking skills.
• English, with professional reading, writing and speaking skills.

You will be part of a growing Belgian SME where initiative and personal development are encouraged. We will provide you with an enjoyable work environment with fun colleagues. We will work out a career plan with you, with attention and a budget for extra education/certification. You can count on an attractive salary, supplemented with extra-legal benefits, including a company car.
(Freelance is also possible)