I build the business systems companies actually run on.

Enterprise apps, ERP and CRM platforms, production tracking, reporting and compliance. Schema to UI, in C#, .NET, DevExpress XAF, Blazor, React and Next.js.

Ten years building, nine of them at one firm, and three engagements running at once right now. I work end to end: SQL Server schema, ASP.NET Core APIs, XAF business logic, the reporting layer, and the front end on top of it.

See the work
3 active

davao, ph

building since
2016
at exprezoe
9y 1mo
concurrent roles
3
upwork hours
6.2K
job success
100%
rating
5.0 (5 rev)
longest contract
456d

work

A decade on one axis. Roles above, contracts below, positioned by their real dates. The overlaps are the point: the contracts ran through the Exprezoe agency alongside the role, and three engagements are running concurrently right now.

roles

contracts

Select a bar to open the engagement.

9y 1mo at exprezoe·3 active·6.2K upwork hrs

roles

contracts

stack

What each layer is built with, across the whole inventory.

client

React.jsNext.jsJavaScriptTypeScriptHTML5CSS3AngularJSBlazor ServerBlazor WebAssemblyDevExpress BlazorDevExtremeWebFormsReact NativeIonic FrameworkXamarinWordPressWooCommerceTailwind CSSBootstrap

api

C#.NET Framework.NET CoreASP.NET CoreASP.NET MVC.NET Core MVCREST API DevelopmentMicroservicesSwagger / OpenAPIFastAPI (Python)PHPAuthentication & AuthorizationBackground Services

business

DevExpress XAFXPO ORMDevExpress WinFormsERP DevelopmentCRM DevelopmentBusiness Process AutomationWorkflow AutomationAdministrative PortalsInternal Business Systems

reporting

DevExpress ReportingDevExpress DashboardsSSRSSSISCustom Built Report Builder

database

SQL ServerPostgreSQLEF CoreDapperDatabase DesignQuery Optimization

cloud

Azure App ServicesAWSGoogle Cloud PlatformAzure Key VaultCI/CD PipelinesCloud DeploymentWindows ServerVirtual Machines

also

GitSource ControlUnit TestingSystem IntegrationPerformance OptimizationTroubleshootingDebuggingTechnical SEONovu Workflow AutomationWordPress

projects

Neksus Admin

Front-end

JavaScript · TypeScript · React · Next.js · Dapper

Neksus API

Back-end

C# · .NET Core · Dapper

Admin Portal

Full-stack

C# · .NET Core API · Microservices · Dapper

Rental Manager Express

DesktopMaintainer

C# · DevExpress XAF · XPO ORM · DevExpress Reporting

Owner Renter Program

DesktopMaintainer

C# · DevExpress XAF · XPO ORM · DevExpress Reporting

Enterprise Manager Express

DesktopMaintainer

C# · DevExpress XAF · XPO ORM · DevExpress Reporting

Software Agency Site

Web

WordPress · HTML5 · CSS3 · SEO

Online Mustang Car Parts

Web

WordPress · HTML5 · CSS3 · SEO

what clients said

Nick was fabulous to work with in helping us complete our task and went above and beyond. Will be using him in the future.
Charles Elisha W.Customize KJV Bible File Format for Freeshow Import2025-10-21·5.0
Great programmer.
Full-stack Web Developer, Azure/AWS, C#, Blazor, API/Swagger, DevExpress, DevExtreme2022-03-18·5.0
He was very responsive to my requests. He completed exactly what I expected him to do. I will gladly use him in the future.
Production Tracking using XAF and Blazor with Dashboards and Reports2021-09-22·5.0
Great programmer, web developer, and graphic artist.
Setting Up Initial RMXAffiliate Sites2020-02-19·5.0

contact

Email is the fastest way to reach me.

nicksia1389@gmail.com
Nick Sia, photographed in Davao Region, Philippines
Nick Sia·davao, ph
based in
Davao Region, Philippines
studied
BSc Information Technology2012–2016Davao Oriental State College of Science and Technology