Senior Software Engineer

Auction Group A/S (AutoProff); Vejle; On-site; DKK 900,000 - 1,300,000; Full time

Job summary

AutoProff is seeking a Senior Software Engineer to join our Technology team in Vejle. You will work on a unified seller solution that powers vehicle intake, pricing, and listing flows across Europe, collaborating with international colleagues.

You will design, develop, and maintain high-quality code using .NET/C# and object-oriented design, while applying best practices for distributed and event-driven architectures and databases.

Qualifications

• Proven ability to thrive in environments that value adaptability and ownership.
• Experience with .NET and C# required.
• Strong understanding of OO programming, distributed systems and event-driven architecture.
• Experience with relational or NoSQL databases.
• Fluent business English (spoken and written).
• Open to learning new technologies quickly.
• Ability to troubleshoot, debug and propose solutions.
• Knowledge of GenAI, its risks, and safe production use.

Responsibilities

• Design, develop, and maintain efficient, reusable, and reliable code.
• Collaborate in a dynamic, international team.
• Promote a culture of ownership: you build it, you own it.
• Mentor colleagues and share knowledge.
• Ensure code quality, testing, and maintainability.

Skills

Net/C#

Object-oriented programming

Distributed systems

Event-driven architecture

Relational databases

No-SQL databases

Business English

GenAI governance

Problem solving

Learning new technologies

Tools

AWS Infrastructure

Job description

Join AutoProff – Help Shape the Future of Automotive Tech!

We are looking for a new colleague to join our talented Technology team based at our Vejle office.

At AutoProff, we believe great technology drives great experiences—and we’re just getting started. We’re on a mission to transform the way vehicles are traded across Europe, and we need curious and driven new colleagues to help us do it.

As our new Senior Software Engineer, you’ll join a cross-functional team responsible for building a unified seller solution that powers how vehicles enter and move through the AutoProff platform. We focus on enabling dealers to efficiently manage, price, and sell their inventory by combining streamlined vehicle intake, data-driven pricing, and intuitive seller tools. Our work simplifies trade-ins, improves sourcing decisions, and helps dealers act faster and more confidently, ultimately unlocking value earlier in the vehicle lifecycle.

We foster a developer-friendly culture where innovation isn’t just encouraged; it’s expected. You’ll have access to modern, AI-powered tools to enhance productivity and streamline your daily work. We host hackathons to explore new tech, ideas and tools, and our internal developer forums are open spaces for discussing architecture, new technologies, and tough engineering challenges. Whether building or learning, there's always room to experiment and grow.

Let’s dive into your key responsibilities. You will:

• Work in a dynamic and international environment with experienced and skilled colleagues
• Design, develop, and maintain efficient, reusable, and reliable code using engineering best practices and design patterns.
• Drive a culture of “you build it - you own it” - mentality
• Identify … (Identify  )
• Mentor and coach co-workers on topics that you master.

The need-to-have skills

• Proven ability to thrive in environments that value adaptability, shared ownership, and continuous improvement
• Experience working with .NET and C#
• Strong understanding of object-oriented programming, distributed systems and event-driven architecture.
• Experience with relational databases or No-SQL databases
• Good communication skills and fluency in business English (spoken and written)
• Open towards and able to quickly learn new technologies
• Ability to troubleshoot problems, debug and suggest solutions
• A pragmatic and responsible approach to GenAI, understanding its limitations and risks, and actively establishing guardrails (e.g. reviews, testing, and policies) to ensure safe, compliant, and scalable use in production environments.

The nice-to-have skills

• Experience working with AWS Infrastructure or other cloud providers, especially containerization and serverless computing.
• Experience with RESTful APIs

About AutoProff