Senior Fullstack .NET Developer - 2025-31550

Internal job title: Solutions Engineer, niveau 3

Department Head quarters: Tech & Data

Education level: Higher professional education

Contract hours: 32-40

Job description

Get started! This is what you’ll do

At Jumbo, we want to inspire our customers every day — whether they shop online, visit our stores, explore our food markets, or enjoy our restaurants. Our mission is to support them at every step of their journey, build lasting loyalty, and turn customers into passionate fans.

As a Senior Full Stack Developer, you play a key role in realizing Jumbo’s digital ambitions. Together with the .NET team, you take on a wide range of responsibilities — from designing and developing to maintaining and improving our systems.

You’ll work closely with business stakeholders and fellow developers to ensure that our products meet the high standards of quality and performance we uphold at Jumbo. Your ability to adapt to the latest technologies, think ahead, and continuously improve makes you an invaluable part of our team.

Together, we are Jumbo: This is where you’ll work

No two days at Jumbo are the same. Things move fast, and we’re constantly looking for ways to do better — for our customers and for each other. We encourage you to spot opportunities, take initiative, and actively contribute to our shared goals. You’ll work in an informal and energetic environment with room for your own ideas, humor, fun, and of course, a strong dose of Jumbo DNA. Collaborating to win over the customer — that’s what we do it for.

We are a close team of seven colleagues with a broad set of skills, supported by a Scrum Master and a Product Owner. Together, we are part of the broader Customer & Assortment department. We believe in creating state-of-the-art solutions in everything we do. We achieve this through our shared passion for getting the best out of the latest technologies (including AI), by applying Agile and DevOps best practices, and by constantly challenging the status quo.

We are proud to work with modern technologies such as .NET 9, Azure, Blazor, microservices, and advanced design patterns — delivering high-value solutions and celebrating success together.

• At least 5 years of relevant work experience as a .NET Developer
• Experience with .NET 8 or 9, Web API, Microservices, and Azure (Web Apps, Functions, SQL)
• Experience or strong knowledge of architectural patterns such as MVVM, CQRS, and Mediator (e.g., MediatR)
• Professional experience with Blazor
• A passion for writing clean, maintainable, and testable code following SOLID principles
• Experience with GitHub or Azure DevOps, and knowledge of unit testing and end-to-end testing
• Experience working in Scrum/Agile/DevOps environments and collaborating across teams
• Excellent command of the English language

• As a Senior Full Stack Developer, you design, develop, and maintain .NET solutions and microservices. You work with modern technologies such as .NET 9, Azure, and Blazor, and drive innovation following Agile and DevOps principles.
• By building high-quality, scalable systems, you ensure that Jumbo’s digital products perform at their best. This enhances the customer experience—both online and in stores—and supports Jumbo’s digital ambitions.
• You work in a close-knit .NET team of seven colleagues, supported by a Scrum Master and Product Owner. Together, you create state-of-the-art solutions and continuously challenge existing standards.
• You collaborate closely with Product Owners, the Scrum Master, business stakeholders, and other development teams. Additionally, you coordinate with UX designers and cloud specialists to integrate and continuously improve solutions.

Extra information

Salarisschaal: Schaal 10 (HK)

Contactperson: Michael von Harras 

Hiring Manager: Niels Kepser