Juan Carlos Valerio Barreto
Senior Fullstack Engineer & Frontend Architect
Estado De México
Summary
Senior Fullstack Engineer & Frontend Architect+10 years of experience specializing in scalable web architecture and Developer Experience (DevEx). Currently leading Frontend Engineering at Banamex, directing the migration of massive-scale banking platforms and optimizing CI/CD pipelines to reduce build times by 30%. Proficient in modern JavaScript ecosystems (React, Next.js, Node.js) with a strong track record of enhancing performance, accessibility, and engineering productivity. Passionate about building tools that empower developers and delivering pixel-perfect user experiences.
Overview
12
12
years of professional experience
1
1
Language
Work History
VP of Software Engineering (Frontend Architect)
Banamex
11.2023 - Current
- Championed a "Developer Experience" initiative by standardizing Git workflows and CI/CD pipelines, resulting in a 50% reduction in merge conflicts and cutting new talent onboarding time by 40% through robust documentation frameworks.
- Architected and directed the migration of the core banking platform (Angular 10 to 20), achieving a 30% reduction in build/deployment times and accelerating feature delivery by 25%.
- Implemented Adobe Launch/Analytics governance, ensuring 100% data privacy compliance while increasing event tracking coverage by 45%.
- Led rigorous code quality and QA automation strategies, reducing post-release issues by 25% and technical debt by 30%.
Senior Fullstack Engineer
Freelance
06.2023 - 11.2023
- Architected high-performance web applications using Next.js for Server-Side Rendering (SSR), significantly boosting SEO and reducing Time-to-Interactive (TTI).
- Achieved 95+ Lighthouse scores across all deliverables by implementing advanced CSS strategies (TailwindCSS) and responsive design best practices.
- Deployed robust applications using Vercel and Cloudflare, ensuring global availability and data integrity.
Senior Software Engineer
Softtek
01.2023 - 05.2023
- Developed a SQL Diagnostic Manager using Node.js for a scalable backend and Angular for the UI, supporting complex data analysis for enterprise clients.
- Enhanced monitoring capabilities for 200+ database instances, enabling real-time decision-making through intuitive dashboard designs.
Lead Fullstack Developer
Research Solutions
01.2017 - 01.2023
- Engineered a critical React-based Outlook Add-in, directly streamlining access to "Article Galaxy" and driving a measurable increase in platform engagement and revenue.
- Refactored backend services using Python and Node.js, improving data processing efficiency by 50% and supporting high-load gadget functionality.
- Led the end-to-end development of 30% of the platform's modular gadgets, optimizing user workflows by 70% and ensuring cross-browser compatibility.
- Rapidly developed a specialized content aggregation tool during the Covid-19 pandemic, providing researchers instant access to 80% of relevant NCBI articles.
Software Engineer
NAAT Tech
09.2021 - 08.2022
- Automated deployment pipelines for HSBC’s "iBoarding" module using Jenkins and SonarCloud, ensuring strict code quality standards and reducing manual errors.
- Reduced loan application processing time by 50% through the optimization of the digital onboarding UI/UX.
Web Developer
Freelancer/Vexilo
11.2013 - 12.2016
- Delivered cost-effective web solutions using HTML5, CSS3, and JavaScript, reducing client development costs by 50% through reusable code patterns. Vexilo (2013 – 2015): Optimized 10+ e-commerce platforms implementing W3C standards and SEO best practices, achieving top organic search rankings within 3 months.
Education
Master of Science - Information Technology Management And Direction
Unir México
Mexico City, Mexico 05.2001 -
Bachelor of Science - Information And Computer Systems
Universidad Bancaria De México
Estado De México 05.2001 -
Skills
Team leadership
Strategic planning
Coaching and mentoring
Decision-making
Core & Architecture
React y JavaScript
DOM, HTTP Protocol, CI/CD, Accessibility
Nodejs, Python, RESTful APIs, SQL, NoSQL
CI/CD Pipelines (Jenkins, GitHub Actions), Git Flow Standardization, Build Tools (Webpack, Vite), Docker, SonarCloud (Static Analysis), Code Review Governance
Server-Side Rendering (SSR), Micro-frontends, Critical Rendering Path, Web Vitals Optimization, HTTP/REST Protocols, Browser Caching & Storage, SEO, Accessibility (WCAG/a11y)
Timeline
VP of Software Engineering (Frontend Architect)
Banamex
11.2023 - Current
Senior Fullstack Engineer
Freelance
06.2023 - 11.2023
Senior Software Engineer
Softtek
01.2023 - 05.2023
Software Engineer
NAAT Tech
09.2021 - 08.2022
Lead Fullstack Developer
Research Solutions
01.2017 - 01.2023
Web Developer
Freelancer/Vexilo
11.2013 - 12.2016
Master of Science - Information Technology Management And Direction
Unir México
05.2001 -
Bachelor of Science - Information And Computer Systems
Universidad Bancaria De México
05.2001 -
Yoga Teacher
As a Yoga Instructor, I cultivate discipline and focus, balancing high-performance engineering with mindfulness and resilience.