Available Ready for new tasks

Freelance
.NET & Umbraco
developer

I help businesses and web agencies with new websites, web applications and further development of existing solutions. With 25 years of web development experience, I can take on projects independently or join your team when you need extra development capacity.

25+ years
of experience in ASP and .NET
20+
Umbraco solutions
Blazor
Server & WebAssembly
Remote-first
hybrid and on-site by agreement
Developed forMcDonald'sDRKrakBonnierKMDQ8 / OKQ8FLSmidthKøbenhavns Kommune
Skills

What I can
help with

My tasks range from new web applications to getting more out of systems that are already running, always with a focus on performance, security and usability. I can take on the whole task or be the extra developer in a team, as extra capacity in your agency or as a permanent developer on your own solution.

Umbraco development

New sites, further development and adjustments in Umbraco 7–17 – including webshops and headless.

Read more →
Umbraco upgrade

From Umbraco 7 or 8 to a supported version – planned, tested and without surprises.

Read more →
Custom website

Flexible websites built in .NET and Umbraco, tailored to your business and easy to edit.

Read more →
Blazor & ASP.NET Core

Web applications and backend in Blazor Server/WebAssembly, ASP.NET Core and SQL Server.

Integrations & Azure

REST/GraphQL APIs, payment solutions and hosting in Azure.

AI integration

Language models and AI features connected to your solution – and AI as a tool in development itself.

Performance & optimisation

Faster pages and systems, e.g. measured by Core Web Vitals – a better user experience and better Google rankings.

Something else?

If your task doesn't fit one of the boxes, please ask. There's a good chance I can help.

Contact me →
Also skilled inSitecoreUmbraco CloudSQL ServerAzureEntity FrameworkShopify APIAzure DevOps
Portfolio

Selected cases

I build new solutions and improve existing systems, from smaller, one-off assignments to long-term collaborations. Whatever the scope, I focus on understanding each client's needs and building solutions that work in practice.

2026 Opus Group Troubleshooting and optimization of an existing Umbraco 17 solution in Microsoft Azure, using Azure Metrics and Application Insights to investigate performance and other issues.
  • Umbraco 17
  • Azure
  • Azure Metrics
  • Application Insights
  • .NET Core
  • C#
  • Git
2025–26 KBH El-Teknik Development of a new website using Umbraco 17 as a headless CMS with a Blazor frontend. The entire solution is built on C# and .NET, from content management to the user-facing frontend.
  • Umbraco 17
  • Blazor SSR
  • .NET Core
  • C#
  • MS SQL
  • Tailwind CSS
  • Git
2022–23 Gorm Agency Backend and full-stack development of Umbraco Cloud websites for the agency's clients. Working with Umbraco 10 and 11, ASP.NET Core, APIs and frontend customizations.
  • Umbraco Cloud 10-11
  • .NET Core
  • Web API
  • ASP.NET MVC
  • C#
  • JavaScript
  • SCSS
2020–22 Kraftvaerk Ongoing development and maintenance of a custom ASP.NET portal solution for the City of Copenhagen.
  • ASP.NET
  • C#
  • Test og fejlfinding
2018–19 FLSmidth New international website via Kraftvaerk
  • Sitecore 9
  • Helix
2015–19 Q8 & OKQ8 q8.dk, okq8.se and f24.dk – uCommerce and CRM integrations via Kraftvaerk
  • Sitecore 8
  • uCommerce
Testimonials

What my clients say

I have worked with Jon for several years on updating and optimising our entire IT setup.

Jon has delivered not only technical solutions but also outstanding service, and his professional approach and ability to find tailor-made solutions have been decisive for our company's digital development.

Ole Nielsen · Managing director and owner, Børne-Foto

Jon has played a decisive role in the development of our platform. With deep expertise in .NET, Umbraco and API integrations he has delivered a stable, scalable and intuitive solution.

His professional approach, fast deliveries and technical insight are absolutely top class!

Eric Jernberg · Managing director and owner, Håndværkernøglen

We have used Saalbach Consult for some years, and whether it has been development projects, smaller adjustments or bug fixes, Jon is both fast and flexible. He has integrated new tools on our platform and developed a large part of the functionality we enjoy today.

Jon quickly grasps the scope of a task and can estimate time with a steady hand.

Bjørn Kroghsbo · Deputy chairman, Dansk Backgammon Forbund
Portrait of Jon Saalbach
Jon Saalbach · Senior .NET developer
About me

Experienced developer,
easy to work with

I've worked in web development for over 25 years, primarily with C# and .NET, and have many years of experience with Umbraco. I've worked on projects both large and small, and I'm used to getting familiar with existing solutions – including code written by other developers.

As an independent developer, I'm the person you talk to and the one doing the work. I value straightforward communication, clear agreements and solutions that aren't more complicated than they need to be.

MCSD: Web Applications
Microsoft
Sitecore Professional Developer
Sitecore 8.2
uCommerce Certified
uCommerce Master Class

How we can
work together

Need help with a single task or extra development capacity over a longer period? I work directly with businesses and as a subcontractor for web agencies. I can take responsibility for individual projects or join your existing team.

I generally charge by the hour, but fixed-price arrangements are also possible for well-defined projects. I work primarily remotely, but I'm also available on-site when it makes sense.

Contact

Let's talk about what you need

Have a project in mind, need help with an existing solution or just have a question? Tell me a little about what you need, and we'll figure out how I can help. I usually reply within 24 hours on weekdays.

Your details are only used to answer your enquiry.Read the privacy policy

An error occurred. Reload 🗙