Experienced Software Developer - Team Tender

Dalux; Københavns Kommune; On-site; DKK 650,000 - 900,000; Full time

Job summary

Dalux is seeking an experienced Software Developer to join the Tender team in Copenhagen. You will own complex features end-to-end, collaborate closely with Product Management and Design, and contribute to architectural decisions that improve the codebase.

The role emphasizes reliability, data security, and evolving modular software. You will mentor teammates, explore AI-assisted development, and help deliver scalable solutions across the Dalux platform while shaping engineering practices.

Qualifications

• Experience with C# and .NET in building complex, scalable software.
• Experience designing and delivering front-end in Angular/TypeScript.
• Familiarity with SQL databases and search engines like MSSQL and Elasticsearch.
• Experience mentoring developers and guiding architectural decisions.
• Understanding Domain-Driven Design and modular architectures.

Responsibilities

• Own complex features and technical problems end-to-end.
• Design scalable, maintainable solutions and contribute to architecture decisions.
• Mentor and spar with other developers to raise engineering standards.
• Collaborate with Product Management and Design to solve problems.

Skills

C# / .NET

Angular / TypeScript

MSSQL

Elasticsearch

AI-assisted development

Mentoring others

Domain-Driven Design

Modular architecture

Tools

AWS

Job description

Build software at scale. Influence how we build it. Help modernize a product area at the heart of construction projects.

Dalux is growing, and we are looking for an experienced software developer to join our team called "Tender".

You will work on software that supports the bidding process for construction projects and is tightly integrated with the wider Dalux platform. It is a domain where reliability, data security, and good technical design matter – and where there is plenty of opportunity to influence how the product and architecture evolve.

You will also have the opportunity to influence how we increasingly use AI to make software development more effective.

Your role

As an Experienced Software Developer, you will take ownership of complex product and technical problems from idea to production.

You will join a full-stack development team working closely with a Product Manager and Product Designer. We expect experienced developers to contribute beyond their individual tasks: helping make good technical decisions, improving the codebase and architecture, sharing knowledge, and raising the engineering standard around them.

Within Tender, there is a particular focus on strengthening and evolving the technical foundation of the product while continuing to deliver new functionality.

Your work can include:

• Owning complex features and technical problems end-to-end
• Designing and implementing scalable, maintainable solutions
• Contributing to architectural decisions and the technical direction of the team
• Improving the structure of an established codebase and reducing technical debt
• Helping evolve boundaries and modularity within the application
• Sparring with and mentoring other developers
• Working closely with Product Management and Design to understand problems and find the right solutions
• Bringing new ideas, technologies, and development practices into the team when they create real value

We expect experienced developers to have opinions, challenge existing solutions, and be comfortable having their own ideas challenged in return.

AI-assisted software development

We are significantly increasing our focus on AI-assisted development across Dalux.

We are actively exploring how AI can improve the software development lifecycle – from understanding requirements and exploring technical approaches to coding, testing, review, debugging, refactoring, and automation.

The Tender team is already experimenting with how these tools can improve its day-to-day development work.

As an experienced developer, we want you to take an active role in that development: experimenting with new workflows, critically evaluating their value, sharing what works, and helping establish good engineering practices around AI-assisted development.

Practical experience using AI as part of your development workflow is an advantage. More importantly, you should be curious about how these tools are changing software engineering and willing to continue evolving your own way of working.

Technologies we work with

Tender is a full-stack product area primarily built with:

• C# / .NET
• Angular / TypeScript
• MSSQL
• Elasticsearch

Our wider platform runs on a distributed cloud architecture using AWS.

Experience with our exact technology stack is useful, but strong software engineering fundamentals and the ability to understand and improve complex systems matter more.

What would make you a particularly strong match?

We are looking for an experienced software developer with strong technical fundamentals and the ability to influence the software around you.

For this particular team, we would especially value:

• Strong professional experience with C# and .NET
• Experience improving or modernizing established software systems
• An understanding of Domain-Driven Design, modular architecture, or similar approaches to structuring complex applications
• Experience mentoring or providing technical sparring to other developers
• Practical experience with AI-assisted development tools and workflows

You do not need to match every point.

Technical judgment, curiosity, and the ability to make an established product better are more important than having worked with exactly the same technologies or architectural patterns before.

Product development at Dalux

Our product teams bring developers, Product Managers, and Product Designers together.

Developers are expected to understand the problem being solved and contribute to finding the solution – not simply implement specifications handed to them.

As an experienced developer, you will have an important voice in balancing user value, usability, technical feasibility, business viability, and long-term technical health.

Our products are relied upon by professionals worldwide, making performance, stability, maintainability, and quality important parts of everyday engineering.

What You Can Expect From Dalux

Dalux is a software company at heart.

As an experienced developer, you can expect:

• Significant ownership of the software you build
• Real influence on technical solutions and engineering practices
• Skilled colleagues who enjoy technical discussions
• Close collaboration between Engineering, Product Management, and Design
• Short paths from technical ideas to decisions and implementation
• Opportunities to improve an established product and architecture
• An environment actively investing in AI-assisted software development
• High levels of trust and freedom in how you solve problems
• A social workplace with monthly events and employee-driven clubs

All Dalux software development takes place in-house at our headquarters in Vibenshuset, Copenhagen. Working together in person is an important part of how we collaborate, share knowledge, and make decisions quickly.

About Dalux

Dalux is a Danish software company founded in 2005 by Bent Dalgaard and Torben Dalgaard.

We build digital tools that make the construction industry smarter and more efficient. Using our own 3D BIM technology, Dalux develops user-friendly software used in more than 140 countries worldwide.

Our core technology is developed entirely in-house, giving our developers the opportunity to influence both the products and the technology behind them.

If you have any questions, feel free to contact IT Talent Acquisition Specialist Sara at [e-mail].

Join our Pizza & Beer event

Sign-up for our free Pizza & Beer event the 29th of October 2026 at Dalux from 16:00: Pizza and Beer with Dalux

During the event, you can hear more about Dalux and the career options through presentations and mingling - all while getting delicious Pizza and beer/drinks!

Application deadline:

Ongoing