DANIEL THEIL VALNERT

SOFTWARE AND PLATFORM ENGINEER

Software and platform engineer at Better Developers. I build full-stack solutions for clients with Next.js and ASP.NET Core, and run the self-hosted platform behind them: infrastructure, CI/CD, monitoring, and backups.

Experience

Better Developers·Platform and People Lead·April 2024 - Present

  • Technical owner of the company's internal platform: self-hosted infrastructure, CI/CD, access control, monitoring, backups, and documentation.
  • Design and development of full-stack solutions for clients, onsite and in-house, as developer, architect, and project manager.
  • Code review, technical sparring, and shared standards for quality and security across projects.
  • Onboarding and mentoring of new employees and interns, and technical interviews with candidates.
LinuxDockerCI/CDNext.jsASP.NET CoreTypeScriptC#AzureCoolifyAnsibleLLM Integration

Netcompany·Software Developer·August 2022 - April 2024

  • Development, operation, and maintenance of business-critical solutions.
  • Primarily worked with technologies such as SharePoint, Azure, Angular, and ASP.NET Core.
  • Responsible for both frontend and backend solutions as well as integration with external systems.
SharePointAzureAngularASP.NET CoreC#TypeScript

VisuTask·Founder and Head of Development·2021 - 2024

  • Developed and operated the product's technical platform from idea to implementation.
  • Handled daily operations and maintenance of the solution.
  • Had primary responsibility for the product's technical direction and architecture.
  • Led the technical effort and coordinated development work.
ASP.NET CoreEntity FrameworkAzureC#JavaScriptSQL Server

EXAKT·Web Developer·2021 - 2022

  • Primary responsibility for maintenance and further development of the company's WordPress websites and WooCommerce webshops.
  • Handled both technical operations, design adjustments, and ongoing optimizations of the user experience.
WordPressWooCommercePHPJavaScriptCSSHTML

Projects

Internal Self-Hosted Platform·2025 - Present

Set up and run the self-hosted platform behind Better Developers' internal projects: Linux servers with a self-hosted PaaS, self-hosted CI/CD runners, and a set of shared internal tools. Currently evaluating infrastructure as code.

LinuxDockerCI/CDSelf-hostingInfrastructure as Code

Secure Access to Internal Services·2025 - Present

Moved internal services onto a private network so they are not exposed to the public internet, and tightened administrative access to the servers.

Network SecurityVPNAccess ControlLinux

Monitoring, Server Maintenance and Backups·2026 - Present

Monitoring of servers and services, automated server maintenance through configuration management, and automated backups.

MonitoringConfiguration ManagementBackupsLinux

Internal Processes and Tooling·2026 - Present

Responsible for establishing internal processes, and the tools that support them, in a company where most things are built from the ground up. This covers onboarding and offboarding, regular status follow-up on clients and projects, and personal health checks, both inspired by Spotify's Squad Health Check model, alongside internal solutions for company events, CVs, and expenses.

Process DesignNext.jsIntegrationsProcess AutomationTypeScript

Decision Support Tool for Crop Rotation Planning·2026 - Present

Decision support tool for nitrogen-aware crop rotation planning for farmers under the Danish green tripartite agreement. Responsible for a redesign focused on user experience and for project management with the project's stakeholders.

ReactTailwind CSSUXTypeScript

Frontend Architecture and Refactoring·2026 - Present

Further development in Svelte together with architecture work and refactoring of the existing solution.

SvelteJavaScript

Mobile Application·2026

Development of a mobile application in .NET MAUI.

.NET MAUI.NETC#

Infrastructure, CI/CD and Cloud Migration·2025 - 2026

Migrated a React application from a locked-in cloud platform to the client's own infrastructure, set up a GitHub Actions CI/CD pipeline with multiple environments, and designed a scalable infrastructure architecture.

CoolifyDockerGitHub ActionsLinuxPostgreSQLSupabaseReact

Next.js Migration and React Operations·2025

Architecture work ahead of a migration from a React SPA to Next.js, alongside daily operations, support, and bug fixing on the existing SPA.

Next.jsReactTypeScript

New Server Infrastructure and CI/CD·2025

DevOps engagement covering server operations, a Coolify setup, and a new CI/CD pipeline.

CoolifyDockerLinuxCI/CD

Better Project Estimator·2025

Architecture and implementation of Better Developers' first public-facing system for project estimates. A language model produces the estimate, with RAG supplying context from the company's previous internal estimates.

Next.jsRAGLLM IntegrationSupabaseTypeScript

Integration and Visualization in Distributed System·2025

Developed an ASP.NET Core backend deployed as a standalone service in an existing service-based architecture, with Next.js frontend for GIS data visualization.

ASP.NET CoreNext.jsKubernetesGISKeycloakYOLOTypeScript

Digital Tool for Environmental Optimization·2024

Next.js-based frontend integrating with REST API for interactive data visualization, focusing on reducing nitrate loading in soil through optimized crop rotations.

Next.jsMapLibreGEOJSONREST APITypeScript

HR Tool Upgrade·2024 - 2025

Upgraded legacy ASP Classic solution to modern full-stack application with GDPR-compliant hosting solution.

Next.jsASP.NET CoreMariaDBCoolifyGDPR

Internal Tool Development·2024 - 2025

Internal tool replacing rigid and time-consuming Excel processes with automated full-stack web solution integrating with internal systems.

Next.jsASP.NET CoreEntra IDMicrosoft Login

ESDH and Search Engine·2023 - 2024

Upgraded legacy PRI system to cloud-based SharePoint Online and ASP.NET Core solution hosted in Azure for administrative region.

SharePoint OnlineASP.NET CoreAzureC#

VisuTask Platform·2021-2024

Founded VisuTask to connect photographers with clients and streamline order processes, similar to Airbnb but for photo and video freelancers.

ASP.NET CoreEntity FrameworkAzureC#SQL Server

Education

B.Sc. Software·Aalborg University·2022

Certifications

Certified Kubernetes Administrator (CKA)·The Linux Foundation·In progress
Microsoft Power Platform Fundamentals·Microsoft·2023

Skills

Programming Languages

C#JavaScriptTypeScriptPythonJavaKotlinCPHP

Frontend Frameworks

HTMLCSSReactNext.jsAngularSvelteSvelteKitTailwind CSSWordPress

Backend

.NETASP.NET CoreEF Core.NET MAUIPowerShellPHPPython

Cloud & Infrastructure

LinuxDockerCoolifyAzureKubernetesAnsibleGitHub ActionsCI/CDWireGuardSystem Administration

Monitoring & Operations

GrafanaPrometheusLokiServer MaintenanceBackups

Databases

SQLSQL ServerCosmos DBPostgreSQLSupabaseMariaDBAmazon S3

AI & Automation

LLM IntegrationRAGn8n

Enterprise & Integration

SharePointEntra IDBashPowerShell