Web Applications
Customer portals, internal tools, and SaaS products built on ASP.NET Core and Blazor — fast, accessible, and designed to scale with your business.
- Blazor
- ASP.NET Core
- REST & gRPC APIs
- Real-time
Accepting new engagements for October 2026
Software that runs your business, built to last.
Holland Codeworks designs and ships secure, high-performance web, mobile, and desktop applications for companies that can't afford to get it wrong. Senior .NET engineering, end to end — from first whiteboard to production support.
One codebase, every platform
Web · iOS · Android · Windows · macOS
10+
Years shipping production software
5
Platforms from a single C# codebase
100%
Senior-engineer delivery — no hand-offs to juniors
24h
Response on every inquiry, guaranteed
Built on a modern, battle-tested stack
C#
.NET 8
ASP.NET Core
Blazor
.NET MAUI
SQL Server
PostgreSQL
Azure
Docker
SignalR
WebRTC
Services
Everything it takes to ship serious software.
Whether you need a new product built from zero, a legacy system modernized, or a specialist to harden what you already run — we own the outcome, not just the code.
iOS & Android Apps
Native-feeling mobile apps for iPhone, iPad, and Android from one .NET MAUI codebase. App Store and Google Play submission, MDM and side-loaded distribution handled.
- .NET MAUI
- App Store
- Google Play
- Push & offline
Desktop Applications
Windows and macOS software for teams that need power-user tooling, hardware integration, or offline reliability that a browser can't deliver.
- Windows
- macOS
- WPF / MAUI
- Installers & updates
Security Engineering
Threat modeling, encryption at rest and in transit, authentication and identity, network and firewall design, and hardening reviews of existing systems.
- Encryption
- OAuth / OIDC
- Network design
- Hardening
Analytics Dashboards
Executive and operational dashboards that turn scattered business data into decisions — with the data pipelines and models to keep them honest.
- Data pipelines
- Reporting
- KPIs
- Visualization
Cloud, DevOps & Modernization
Migrations to Azure or containers, CI/CD, monitoring, and incremental rewrites of aging .NET Framework or VB applications without stopping the business.
- Azure
- Docker
- CI/CD
- Legacy migration
Featured work
Built end to end. Running in production.
A look at the kind of system we design, build, secure, and operate.
WebFile.TAX — virtual tax preparation platform
A complete client portal for a tax practice: secure onboarding with SMS identity verification, encrypted document exchange, in-browser video meetings, interactive return presentation, and electronic signature — delivered as a responsive web app and companion mobile experience.
- Encrypted document storage and sharing for sensitive financial records
- Built-in video meetings — no third-party conferencing tools required
- Interactive tax-return presentation with live federal and state breakdowns
- One .NET codebase serving desktop, tablet, and phone
Client portalsSecure self-service for customers, patients, and clients.
Line-of-business systemsThe operational software your team lives in every day.
Compliance-grade messagingSMS and email workflows built with consent and audit trails.
IntegrationsPayments, e-signature, identity, and legacy data sources.
How we work
A process designed to remove surprises.
Clear scope, weekly demos, and software you can see running from the first sprint. You always know where the project stands and what it costs.
01
Discover
A working session to understand your business, users, constraints, and what "done" actually means. You get a written scope and estimate — no obligation.
02
Design
Architecture, data model, security posture, and UI flows defined up front so building is execution, not guesswork.
03
Build
Short iterations with a live demo every week. Automated tests, code reviews, and staging environments from day one.
04
Launch & support
Production deployment, monitoring, and documentation — then ongoing support and enhancements on a retainer that fits your pace.
About
Engineering-led. Founder-run. Accountable.
Holland Codeworks was founded in 2022 by Eric Holland in Fort Collins, Colorado, after more than a decade building mobile, desktop, and web software across a range of industries.
We specialize in the Microsoft .NET ecosystem because it lets us deliver on iOS, Android, macOS, Windows, and the web from a single, well-tested codebase — which means lower cost, faster releases, and one team that understands the whole system.
Every engagement is led directly by a senior engineer. You talk to the person writing the code, the estimates are honest, and the work is built to be maintained for years, not just to pass a demo.
EH
Eric Holland
Founder & Principal Engineer
Security is a default, not an add-onEncryption, least privilege, and threat modeling are part of every build.
Performance you can feelFast load times and responsive interfaces on every device, measured and tuned.
Craftsmanship over shortcutsClean architecture, automated tests, and documentation your next engineer will thank you for.
Straight talkReal estimates, real trade-offs, and a direct line to the engineer on your project.
Contact
Tell us what you're building.
Share a few details and we'll reply within one business day with next steps — usually a short call to scope the work and give you a straight answer on timeline and cost.
- Prefer email? eric@hollandcodeworks.com
- Response within 24 hours, Monday–Friday
- Fort Collins, Colorado — working with clients across the U.S.
- Your details are only used to respond to your inquiry. NDAs welcome.