Architecture with intent
I use modular frontend architecture and clear state boundaries so products remain understandable as they grow.
About
I'm Alejandro Trejo.
I build web and mobile products for distributed teams across Latin America and the United States, working on the details that turn an idea into a dependable everyday tool.
My focus stays on maintainability, technical quality, testing, and user experience so teams inherit interfaces they can understand, evolve, and trust.
Practice
How I work
Quality as a product feature
Testing, performance, and well-documented components are part of the product from the start, not a final pass.
Interfaces for real work
I begin with the workflow so people can move quickly, understand what happens next, and use complex tools with confidence.
Toolkit
Technical focus
Frontend & mobile
Angular, React, React Native, Ionic
Backend & APIs
NestJS, Prisma ORM, PostgreSQL, REST APIs, Swagger/OpenAPI
State management
NgRx, SignalStore, Redux
UI systems
Tailwind CSS, SCSS, PrimeNG, Storybook
Quality
Unit and component testing with Jest, React Testing Library, Karma, and Jasmine
Cloud & BaaS
Supabase, Firebase, Google Cloud Platform