
Senior Software Developer (.NET / Azure)
- Hybrid
- Mijdrecht, Utrecht, Netherlands
- €5,000 - €7,000 per month
- Development
Job description
As a Senior Software Developer at UAB-Online, you play a key role in the continued development and modernization of our SaaS platform. Our software connects terminals, vessel operators, and supply chain partners worldwide, helping them collaborate more efficiently across liquid and dry bulk operations.
You design, build, and improve scalable enterprise applications within a modern Microsoft ecosystem. In addition to delivering new functionality, you contribute to architectural decisions, strengthen our engineering practices, and help reduce technical debt. You combine strong software engineering skills with a practical mindset and take ownership of your work from concept through production.
In this role, you work closely with developers, Product Owners, UX, QA, Cloud, and other colleagues. You enjoy solving complex technical challenges, sharing knowledge, and continuously improving the way software is designed, tested, and delivered. You will also have the opportunity to explore how AI-assisted development and coding agents can improve both our development process and our product.
What you can expect
As a Senior Software Developer, your work combines hands-on development with technical improvement and collaboration. One moment you may be designing and implementing a new feature, while the next you are reviewing code, improving a deployment pipeline, or working with colleagues on the modernization of an existing part of the platform.
You can expect a role in which you have visible impact, contribute to technical decisions, and help shape the future of a business-critical platform used by maritime organizations around the world.
Your work will include:
Designing, building, and enhancing enterprise SaaS applications using C# and .NET
Taking ownership of features from initial concept through development and production
Contributing to the modernization of our platform and the continued development of its architecture
Building reliable, scalable, and maintainable solutions using Clean Architecture and SOLID principles
Reviewing code and promoting software engineering best practices
Developing and improving CI/CD pipelines and deployment processes
Implementing automated testing throughout the development lifecycle
Working with Azure cloud services and modern DevOps tooling
Exploring and introducing AI-assisted development workflows and coding agents
Collaborating with Product, UX, QA, Cloud, and Frontend colleagues
Identifying opportunities to reduce technical debt and improve delivery efficiency
Job requirements
For this role, we are looking for an experienced software developer who combines strong technical expertise with ownership, curiosity, and a collaborative mindset. You are comfortable working on both new functionality and existing systems, and you enjoy contributing to long-term technical improvements.
In general, we look for:
Ownership: you take responsibility for your work, follow through, and actively look for ways to improve results
Genuine communication: you communicate openly and respectfully, listen well, and say what you mean
Collaboration: you share knowledge, ask for input, support others, and help the team make better decisions faster
Experience working in an Agile environment
Ability to work effectively in a cross-functional team while also being comfortable working independently
Adaptability in a dynamic environment with changing priorities
A proactive approach to problem-solving and continuous improvement
Integrity and professionalism when working with business-critical systems and information
Comfortable working in an ISO-certified environment, including ISO 27001 and ISO 9001, and following agreed processes for quality, security, and continuous improvement
For the Senior Software Developer role, we additionally value:
Strong professional experience with C#, .NET, ASP.NET, and Entity Framework
Experience building and maintaining enterprise-scale applications
Strong knowledge of Clean Architecture, SOLID principles, and software design patterns
Experience modernizing legacy systems and improving existing platforms
Hands-on experience with Microsoft Azure and modern CI/CD practices
Experience with automated testing and software quality practices
An interest in AI-assisted software development or AI-powered applications
Strong communication skills and a collaborative approach to software engineering
The ability to make well-considered technical decisions and explain them to others
Full professional proficiency in English, both spoken and written
Experience with the following is considered a plus:
Maritime, logistics, or supply chain environments
Microsoft SQL Server
Vue.js
Kubernetes
Advanced Microsoft Azure services
Working closely with Product Owners and Agile product teams
Working at UAB-Online
This vacancy gives you an impression of the role itself. If you would like to learn more about our team, culture, benefits, office, and hiring process, you can find more information on our careers page.
**We are handling the recruitment for this vacancy ourselves and are not working with external recruitment agencies for this role. Acquisition in response to this vacancy is therefore not appreciated. Unsolicited profiles or proposals will not be considered.**
- Mijdrecht, Netherlands
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