Available for new projects

Hi, I'm Sergio Barreras

Full Stack Developer

Specialized in building scalable web applications with Angular, NestJS, and TypeScript. Passionate about clean architecture, user experience, and automation.

Contact Me Download CV

5+ years exp.

About Me

I'm a Full Stack Developer with over 5 years of experience building scalable web applications. My focus is on creating efficient, maintainable, and user-centered solutions.

I specialize in modern architectures using Angular, NestJS, and TypeScript, always applying SOLID principles and Clean Architecture to ensure quality code.

Co-founder of DevCrafters, where we help companies create web, mobile, and cloud solutions that transform their business processes.

Learn about DevCrafters

Years of experience

15+

Completed projects

30+

Certifications

100%

Commitment

Experience

Angular Frontend Developer

Capgemini

May 2026 - Present

Aguascalientes, Ags.

Resolved accessibility (a11y) issues in the shared component library used across company projects
Collaborated with the design team on the creation of new reusable components for the design system
Improved adoption of existing components by documenting previously uncovered use cases

Full Stack Developer

Creative Software International

Jul 2025 - Oct 2025

Remote from Aguascalientes, Ags.

Designed and improved database schemas for granular permissions
Implemented advanced rules for delegated workflows
Resolved Work Orders deadlocks by refactoring transactional logic
Automated email segmentation and fixed CRUD inconsistencies

Full Stack Developer

Taruks Soluciones S.A. de C.V.

Dec 2022 - Aug 2024

Ciudad Obregón, Sonora

Developed Angular applications with Clean Architecture principles
Integrated REST APIs and implemented reactive forms with RxJS
Participated in Scrum ceremonies and code reviews
Delivered responsive interfaces aligned with UX best practices

Projects

⭐

BotBite

AI Waiter Assistant for Restaurants

SaaS platform that allows customers to order food via WhatsApp using conversational AI. Multi-restaurant architecture with dynamic QR codes.

Angular

Tailwind CSS

RxJS

WebSocket

NestJS

PostgreSQL

Redis

ChatGPT

Twilio

Cloudinary

Render

View Demo GitHub

⭐

Diocese of Cd. Obregón

Digital infrastructure for ecclesiastical administration

Multi-entity management platform with role-based access control, modular architecture, adaptive forms, and integrated public-facing interface.

Angular

Tailwind CSS

RxJS

Django

PostgreSQL

Cloudinary

Render

View Demo GitHub

⭐

Magnolias Bakery

Multi-branch management for custom order workflows

Multi-branch administrative system for a bakery, with complex order flows (delivery, events, in-store sales) and role-based access control. Includes single-use JWT authorization for sensitive actions (discounts, order authorship on branch-shared accounts) and a CI/CD pipeline with automated tests and SonarQube quality gates. Public landing page synced with the internal catalog.