Senior Developer

Taleron (formerly RocketPeople); Rotterdam; Hybrid; EUR 70,000 - 100,000; Full time

Job summary

UAB-Online in The Netherlands is seeking a Senior Software Developer to design, build, and scale enterprise SaaS applications using C# and .NET within a hybrid work setup. You will influence architecture, modernize platforms, and explore AI-assisted development in a Microsoft ecosystem.

Join a growing international SaaS company and own features from concept through production, collaborating with Product, UX, QA, Cloud, and Frontend teams to deliver reliable, scalable software.

Qualifications

• Strong experience with C#, .NET, ASP.NET, and Entity Framework.
• Experience building and maintaining enterprise-scale applications.
• Knowledge of Clean Architecture, SOLID principles, and design patterns.
• Experience modernizing legacy systems and improving existing platforms.
• Hands-on experience with Azure and modern CI/CD practices.
• Experience with automated testing and software quality practices.
• Interest in AI-assisted development or AI-powered applications.
• Strong communication skills and a collaborative mindset.
• A proactive, ownership-driven approach to software engineering.

Responsibilities

• Design, build, and enhance enterprise SaaS applications using C# and .NET.
• Drive platform modernization and help evolve our architecture.
• Lead code reviews and promote engineering best practices.
• Introduce and improve AI-assisted development workflows and coding agents.
• Build reliable, scalable, and maintainable solutions using Clean Architecture and SOLID principles.
• Develop and optimize CI/CD pipelines and deployment processes.
• Implement automated testing strategies across the development lifecycle.
• Work with Azure cloud services and modern DevOps tooling.
• Collaborate closely with Product, UX, QA, Cloud, and Frontend teams.
• Identify opportunities to reduce technical debt and improve delivery efficiency.
• Take ownership of features from concept through production.

Skills

Ownership

Communication

Collaboration

Tools

C#

.NET

ASP.NET

Entity Framework

Azure

CI/CD

Automated testing

AI-assisted development

Job description

(.NET / Azure)

Shape the Future of Global Maritime Operations

UAB-Online is transforming how the maritime industry collaborates. Our SaaS platform connects terminals, vessel operators, and supply chain partners worldwide, enabling smarter, more efficient liquid and dry bulk operations.

Senior Software Developer (.NET / Azure)

UAB-Online is transforming how the maritime industry collaborates. Our SaaS platform connects terminals, vessel operators, and supply chain partners worldwide, enabling smarter, more efficient liquid and dry bulk operations.

As we continue our international growth, we're looking for a Senior Software Developer who wants to make a real impact—someone who enjoys building scalable software, driving technical improvements, and helping shape the future of our platform.

Location: Mijdrecht, The Netherlands (Hybrid - 2 days per week in the office)

The Opportunity

This is more than a development role.

You'll play a key part in scaling a business-critical platform used by leading maritime organizations around the world. Working within a modern Microsoft ecosystem, you'll influence architecture, improve engineering practices, help drive our modernization initiatives, and explore how AI can enhance software development and product capabilities.

If you're someone who enjoys ownership, continuous improvement, and solving complex technical challenges, we'd love to meet you.

What You'll Do

• Design, build, and enhance enterprise SaaS applications using C# and .NET
• Drive platform modernization and help evolve our architecture
• Lead code reviews and promote engineering best practices
• Introduce and improve AI-assisted development workflows and coding agents
• Build reliable, scalable, and maintainable solutions using Clean Architecture and SOLID principles
• Develop and optimize CI/CD pipelines and deployment processes
• Implement automated testing strategies across the development lifecycle
• Work with Azure cloud services and modern DevOps tooling
• Collaborate closely with Product, UX, QA, Cloud, and Frontend teams
• Identify opportunities to reduce technical debt and improve delivery efficiency
• Take ownership of features from concept through production

What You'll Bring

• Strong experience with C#, .NET, ASP.NET, and Entity Framework
• Experience building and maintaining enterprise-scale applications
• Knowledge of Clean Architecture, SOLID principles, and design patterns
• Experience modernizing legacy systems and improving existing platforms
• Hands‑on experience with Azure and modern CI/CD practices
• Experience with automated testing and software quality practices
• Interest in AI-assisted development or AI-powered applications
• Strong communication skills and a collaborative mindset
• A proactive, ownership-driven approach to software engineering

Nice to Have

• Experience in maritime, logistics, or supply chain environments
• Microsoft SQL Server, Vue.js, or Kubernetes experience
• Advanced Azure expertise
• Experience working closely with Product Owners or Agile teams

Why Join UAB-Online?

You'll join a growing international SaaS company where your work has visible impact from day one. We offer the opportunity to influence technical decisions, shape engineering practices, and work on software that supports critical operations across global supply chains.

At UAB-Online, You'll Find

• Meaningful technical challenges at scale
• Modern cloud and Microsoft technologies
• Freedom to innovate and take ownership
• A collaborative and ambitious team
• A growing product with international reach

If you're excited about building great software and helping shape the future of a rapidly growing platform, we'd love to hear from you.