Darmixista

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Darmixista
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OrlandoGalvan Vargas

Full Stack & Android Developer

I build robust software end to end: APIs, web and Android. Clean architecture inside, intuitive experience outside.

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What is a Darmixista?

Evolving intellect and technical versatility: I see code as a living ecosystem that can always be improved.

Clean code, solid architecture and efficiency: the principles behind every project I build.

Stack

  • 01Backend

    • C# / .NET
    • ASP.NET Core
    • Java / Spring Boot
    • PostgreSQL
    • Entity Framework
    • JWT / OAuth

  • 02Web

    • React
    • TypeScript
    • Vite
    • Tailwind CSS
    • TanStack Query
    • Astro

  • 03Mobile

    • Kotlin
    • Android
    • Room
    • WorkManager
    • Foreground Services

  • 04Architecture

    • Vertical Slice
    • CQRS / MediatR
    • DDD
    • REST / OpenAPI
    • Docker
    • AWS
    • CI/CD

Daily use

Journey

Experience

  1. 20XX — Present

    Full Stack Developer · Freelance

    I modernize and automate processes with web, backend and mobile solutions.

  2. 20XX — 20XX

    [Your role] · [Empresa]

    [One line about your role and key achievements.]

Education

  1. 20XX — 20XX

    [… Engineering] · [Universidad]

  2. 20XX

    [Certification or course] · [Institución]

Web projects

01/04

2026SaaS platform

FacilityOS

Multi-tenant facility management for school districts, with a Vertical Slice + CQRS backend.

  • .NET 10
  • React 19
  • TanStack Query
  • Zustand
View demoView code
FacilityOS

2026Productivity

Darmix Tasking

Project and task manager: a Laravel REST API with JWT and a React SPA, with filters, light/dark themes and a demo mode.

  • Laravel 12
  • React 19
  • TypeScript
  • MySQL
View demoView code
Darmix Tasking

2025Human Resources

RH Plus

HR platform with role-based access: employees, attendance, performance reviews, recruiting and contracts.

  • React 19
  • Vite
  • Tailwind CSS
  • React Router 7
View demoView code
RH Plus

2026Task managementIn progress

Kardexis

Collaborative Trello/Jira-style manager: workspaces, boards, tasks, attachments and comments.

  • Spring Boot
  • PostgreSQL
  • React
  • TypeScript
Coming soon

Mobile apps

01/01

2026Digital wellbeing

DarmixPet

Screen-time control with a floating pet that lives on top of your apps and tells you when to stop.

  • Kotlin
  • Jetpack Compose
  • Material 3
  • Room
Get the appView code
DarmixPet

Services

From first sketch to production: I build and support software that solves real problems and grows with you.

Tell me about your project
  • 01

    Web applications

    Custom platforms and dashboards, fast and scalable, with a polished experience on every screen.

    Custom platforms and dashboards

  • 02

    Backend & APIs

    Secure, well-documented APIs with clean architecture, robust authentication and integrations.

    Secure APIs, clean architecture

  • 03

    Mobile apps

    Native Android apps in Kotlin: performance, device features and a smooth experience.

    Native Android in Kotlin

  • 04

    Desktop software

    Desktop applications built around the specific workflows of your operation or team.

    Tools for your operation

  • 05

    Automation

    I modernize manual processes: integrations, scheduled jobs and workflows that save hours.

    Manual processes, now automatic

  • 06

    Consulting

    Architecture, technology choices and technical planning so your project grows without rewrites.

    Architecture and technical planning

Tell me about your project

Let's talk.

Tell me what you need to build or improve. I reply within 24 hours.

Available for projectsMexico City
CV in EnglishCV in Spanish

Send me a message

Project type

© 2026 Orlando Galvan Vargas · DarmixistaAll rights reserved.

Send me a message

Send me a message

Project type

0105

2026 · SaaS platform

FacilityOS

A platform to manage educational facilities with per-district and per-school isolation. The .NET backend follows Vertical Slice Architecture with CQRS (MediatR) and JWT auth with refresh tokens in httpOnly cookies. The React 19 frontend is feature-oriented, with offline caching in IndexedDB and a mock mode for the demo.

Highlights

  • Multi-tenancy per district and school
  • Vertical Slice + CQRS with MediatR
  • JWT with refresh token in httpOnly cookie
  • Mock-mode demo with offline cache

Technologies

  • .NET 10
  • React 19
  • TanStack Query
  • Zustand
  • Ant Design
  • MediatR
  • IndexedDB
View demoView code

2026 · Productivity

Darmix Tasking

A full stack app to organize work into projects and tasks with status and priority. The Laravel 12 RESTful API uses JWT auth with refresh, Form Requests, API Resources, authorization policies (each user only sees their own data) and eager loading to avoid N+1 queries. The React 19 + TypeScript SPA combines TanStack Query and Zustand, forms with react-hook-form and Zod, search filters with server-side pagination, and a local demo mode that keeps the interface usable even when the backend is unavailable. Everything runs with Docker Compose and is tested on both sides (Pest and Vitest).

Highlights

  • REST API with JWT, policies and API Resources
  • Server-side filters, search and pagination
  • Local demo mode when the backend is down
  • Docker Compose and tests with Pest and Vitest

Technologies

  • Laravel 12
  • React 19
  • TypeScript
  • MySQL
  • JWT
  • Tailwind v4
  • TanStack Query
  • Docker
View demoView code

2025 · Human Resources

RH Plus

A web system for HR departments that automates key talent management tasks: employee records, attendance tracking, performance reviews with per-area templates and weighted indicators, job openings and applications, and contracts. The React + Vite frontend consumes a REST API with JWT authentication, guards routes by session and gates each module by the user’s role. It includes a demo mode with HR and employee profiles to explore the system without an account, and follows its own UI/UX guidelines.

Highlights

  • Five talent management modules
  • Role-based access to routes and modules
  • Reviews with weighted indicators
  • Demo mode with HR and employee profiles

Technologies

  • React 19
  • Vite
  • Tailwind CSS
  • React Router 7
  • Axios
  • JWT
  • Framer Motion
View demoView code

2026 · Task management

Kardexis

Collaborative task management API with an enterprise architecture: Spring Boot, PostgreSQL versioned with Flyway, JWT auth, attachments on AWS S3 and container deployment. SPA frontend with React, TypeScript and TanStack Query.

Highlights

  • Workspaces, boards and tasks
  • Flyway migrations
  • Attachments on AWS S3
  • Containerized deployment

Technologies

  • Spring Boot
  • PostgreSQL
  • React
  • TypeScript
  • Flyway
  • AWS S3
  • Docker
Coming soon

2026 · Digital wellbeing

DarmixPet

A digital wellbeing Android app that limits the apps you choose by sessions: max time per session, cooldown between sessions and a daily session cap. A draggable floating pet (overlay) reacts to gestures, speaks, offers a quick menu for brightness, volume and timer, and blocks the app when time runs out. It detects the open app instantly with AccessibilityService, works 100% on the phone and checks GitHub releases for new versions. Three characters with their own visual style on an extensible skin architecture.

Highlights

  • Floating overlay with gestures and quick menu
  • Session-based blocking with cooldown
  • Instant detection with AccessibilityService
  • Update alerts from GitHub Releases

Technologies

  • Kotlin
  • Jetpack Compose
  • Material 3
  • Room
  • Coroutines + Flow
  • Foreground Service
  • AccessibilityService
  • TextToSpeech
Get the appView code