# Modgift — Sebastian Dammark

> Senior Web Developer & Umbraco Expert based in Aarhus, Denmark.

## About

Sebastian Dammark is an independent senior web developer with 30+ years of experience building for the web (since 1996). He has worked professionally since the early 2000s and has specialized in Umbraco CMS since 2010 (15+ years). He operates as a one-man consultancy under the name **Modgift**, serving companies and digital agencies across the Nordics.

Sebastian brings deep technical expertise combined with a pragmatic, no-nonsense approach. His focus is on delivering stable, maintainable solutions — with emphasis on simplicity over complexity, and real-world usability for both developers and end users.

## Services

### Frontend Development

Specializing in core web technologies with a focus on simplicity, stability and scalability:

- **HTML** — Semantic, accessible markup
- **CSS / SCSS / LESS** — Maintainable styling architectures
- **JavaScript** — Vanilla JS and selective framework usage
- **XML / XSLT** — Data transformation and templating

Philosophy: Fewer heavy frameworks, less complexity, more focus on usability for both editors and end users.

### Umbraco CMS Backend

Deep expertise in Umbraco since 2010, covering the full lifecycle:

- **Implementation** — New Umbraco projects from scratch, architecture and setup
- **Upgrades** — Version migrations (including major version jumps)
- **Migrations** — Moving from other CMS platforms to Umbraco
- **Performance** — Query optimization, caching strategies, load analysis
- **Technical Guidance** — Architecture reviews, best practices, mentoring

Technologies: C#, ASP.NET Core, SQL Server, Razor, .NET

### Support & Maintenance

Ongoing operational support for existing websites and applications:

- Bug fixing and feature enhancements
- Monitoring and issue handling
- Security updates and patches
- Domain, DNS and technical troubleshooting

### Hosting & Operations

Reliable hosting and infrastructure management:

- Stable hosting environments
- Monitoring and alerting
- DNS & domain management
- Backups and security hardening
- Performance optimization
- **99.9% uptime target**

## Retainer Packages

Flexible retainer agreements designed for different needs:

| Hours/month | Rate | Best for |
|-------------|------|----------|
| 10 hours | 850 DKK/hour | Ad-hoc needs or smaller tasks |
| 20 hours | 800 DKK/hour | Smaller teams or agencies with fluctuating workloads |
| 40 hours | 750 DKK/hour | Continuous development, support and strategic guidance |

Custom agreements are available for engagements exceeding 40 hours/month.

## Previous Experience

Sebastian has worked with a wide range of companies, from startups to global enterprises:

- **Vokseværk** — Frontend & Umbraco Developer
- **Limbo** — Tech Lead / Senior Frontend & Umbraco Developer
- **Connec ApS** — Partner
- **Knöw** — CTO & Founding Partner
- **LEGO Group** — External IT Consultant
- **Grundfos** — External IT Consultant
- **Designit** — Senior Frontend/Backend Developer
- **Illumi** — Frontend Developer
- **Dynamicweb Software A/S** — Evangelist, Ecommerce Product Owner, Frontend Developer

## Technical Profile

### Core Technologies
HTML, CSS, SCSS, LESS, JavaScript, XML, XSLT, C#, ASP.NET Core, SQL Server, Razor, .NET

### CMS Expertise
Umbraco CMS (15+ years), Dynamicweb (earlier career)

### Approach
- Pragmatic problem-solving over theoretical perfection
- Strong opinions on simplicity and maintainability
- Deep understanding of the full web stack
- Experienced in both agency and enterprise environments

## Contact

- **Email:** [sebastian@modgift.dk](mailto:sebastian@modgift.dk)
- **Phone:** [+45 2625 3341](tel:+4526253341)
- **Location:** Aarhus, Denmark (working across the Nordics)
- **Website:** [https://modgift.dk](https://modgift.dk)

## Source Files

- [llms.txt](https://modgift.dk/llms.txt) — Concise plain-text summary
- [llms-full.txt](https://modgift.dk/llms-full.txt) — This file (detailed Markdown version)