Available for new projects

Hi, I'm Sergio Barreras

Full Stack Developer

Specialized in building scalable web applications with Angular, Vue, 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, Vue/Nuxt, NestJS, and TypeScript, always applying SOLID principles and Clean Architecture. I also have experience incrementally migrating legacy systems (Django, Express, Flutter) to new stacks without disrupting production.

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

Restaurant platform where diners scan a QR code at their table and place their order over WhatsApp with an AI virtual waiter, with no app to install. The assistant speaks Spanish, English, French, and Korean, understands text and voice messages, shares dish photos and recommendations, handles table requests, and lets guests ask for the bill. Owners manage their branches and menus from a web dashboard, while cashiers and waiters receive orders in real time from their own view.

Angular

Tailwind CSS

RxJS

WebSocket

NestJS

TypeORM

PostgreSQL

Swagger

ChatGPT

Twilio

Cloudinary

Render

View Demo GitHub

⭐

Diocese of Cd. Obregón

Digital infrastructure for ecclesiastical administration

Management platform for the Diocese that centralizes information on parishes, priests, news, and documents, along with its public website. Includes modules for the Biblical Institute and ISMA with role-based access, and a progressive modernization of the system without disrupting day-to-day operations.

Angular

Tailwind CSS

RxJS

NestJS

TypeORM

Django

PostgreSQL

Jest

Cloudinary

Render

View Demo GitHub

⭐

Magnolias Bakery

Multi-branch management for custom order workflows

Administrative system for a multi-branch bakery that organizes the entire order process: from taking the order in store, over social media, or by phone, through production, to home or event delivery. Each team member (admins, employees, bakers, and drivers) has their own view and tasks. Includes an online store synced with the internal catalog.