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I buildsoftwareplatforms

Founder. Developer. Architect.

Founder @ VetPMS | Freelance Fullstack .NET Developer

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About

Not just frontend or API. I handle architecture, backend, portals, mobile apps, integrations, and deployment. The full picture.

In the last three years, I’ve built production systems with teams as small as two. These run daily at well-known companies. Highlights: a fintech platform processing live transactions for major retailers; an HR system that replaced a stack of SaaS tools; a multi-tenant portal that cut onboarding from weeks to minutes.

Right now, I’m building VetPMS: AI-native practice management for veterinary clinics. Real-time speech-to-form, streaming transcription, and a modular platform designed to cut clinic admin in half.

3+

Years in production

4

Platforms shipped

3

Industries

Available 20 hours per week. Remote-first. On-site when it matters.

Projects

What I've built

VetPMS

Founder / CTO

AI-native practice management for veterinary clinics. The vet speaks, the record writes itself.

60+ vet professionals giving feedback. First pilot clinic lined up.

ReactTypeScriptASP.NET CoreSignalRAssemblyAIPostgreSQL

Pay-on-Demand Platform

Co-developer, full stack

Employees access earned salary anytime. Full technical ecosystem built with one other developer.

Live, used by major retailers nationwide. Apps in both stores.

.NET MAUIBlazor WASMDuende IdentityServerTrueLayerFirebaseSQL Server

All-in-One HR Platform

Lead developer

Replaced a landscape of SaaS tools with one integrated staffing platform.

The company runs its entire operation on this platform.

Blazor ServerASP.NET CoreSignNowNmbrsBrevoPostgreSQL

Multi-Tenant Client Portal

Architect and lead developer

Standardized portal serving multiple clients from one codebase. Automated onboarding with DNS, SSL, setup wizard.

New clients onboard in minutes, not weeks. Now the production system.

.NETBlazor ServerWeb APIxUnitLet's EncryptAzure DevOps

Stack

Technologies I work with

Core stack: .NET (ASP.NET Core, Blazor, MAUI), React, TypeScript, PostgreSQL, SQL Server. I use Blazor or React on the frontend, whichever fits the product.

Backend

ASP.NET CoreC#.NETEntity Framework Core

Frontend

ReactTypeScriptBlazorTailwind CSSNext.js

Mobile

.NET MAUI

Database

PostgreSQLSQL Server

Auth & Security

Duende IdentityServerOAuth 2.0AES/PBKDF2

Integrations

NmbrsSignNowBrevoFirebaseTrueLayerWebFlow

DevOps

Azure DevOpsGitxUnitHangfireSerilog

AI

AssemblyAIReal-time streamingGenerative AI

Contact

Let’s build.

Available for freelance projects, 20 hours per week. I prefer projects where I’m involved from architecture to delivery.

20 hours/week · Remote-first · On-site when it matters

Built with Next.js, Three.js, and curiosity.

© 2026 Reynethan Leon