Hi, I'm Sergio Méndez, a full-stack developer with 8+ years of experience building mobile and web applications. I specialize in frontend architecture and user experience, turning complex business requirements into scalable, maintainable solutions. I've led frontend initiatives, collaborated with cross-functional teams, and contributed to backend API and database work. I value rapid product iterations, data visualization, and clean UI/UX, and I'm comfortable in agile Scrum environments.…

Sergio Méndez

Hi, I'm Sergio Méndez, a full-stack developer with 8+ years of experience building mobile and web applications. I specialize in frontend architecture and user experience, turning complex business requirements into scalable, maintainable solutions. I've led frontend initiatives, collaborated with cross-functional teams, and contributed to backend API and database work. I value rapid product iterations, data visualization, and clean UI/UX, and I'm comfortable in agile Scrum environments.…

Available to hire

Hi, I’m Sergio Méndez, a full-stack developer with 8+ years of experience building mobile and web applications. I specialize in frontend architecture and user experience, turning complex business requirements into scalable, maintainable solutions.

I’ve led frontend initiatives, collaborated with cross-functional teams, and contributed to backend API and database work. I value rapid product iterations, data visualization, and clean UI/UX, and I’m comfortable in agile Scrum environments.

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Skills

Experience Level

AngularJS
Expert
JavaScript
Expert
Tailwind
Expert
HTML5
Expert
Github
Expert
TypeScript
Expert
UI
Expert
CSS
Expert
MySQL
Expert
C#
Expert
.NET
Expert
Node.js
Expert
Express
Expert
Figma
Expert
Socket.IO
Expert
Vue.js
Expert
PHP
Expert
Ionic
Expert
AWS
Expert
MongoDB
Intermediate
PostgreSQL
Intermediate
Kubernetes
Intermediate
Swift
Intermediate
Flutter
Intermediate
Docker
Intermediate
React Native
Beginner
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Language

Spanish; Castilian
Fluent
English
Advanced
Italian
Advanced

Work Experience

System Analyst and Frontend Developer at Guatemala Express
October 1, 2025 - January 1, 2026
Led the development of a remittance management platform for beneficiary tracking, reporting, document management, and operational control processes. Designed frontend workflows and database structures to centralize administrative and financial information. Developed reporting and control modules that improved operational traceability and reduced manual administrative tasks.
Frontend Developer at Xrossover Sports
November 1, 2024 - February 1, 2025
Commercial Sports Website Frontend Developer. Designed and developed a commercial website including informational pages, blog functionality, and e-commerce features. Implemented responsive UI components and optimized user experience across desktop and mobile devices. Collaborated with stakeholders to align branding, content structure, and technical implementation goals.
Commercial Sports Website Frontend Developer at Xrossover Sports
November 1, 2024 - February 1, 2025
Designed and developed a commercial website including informational pages, blog functionality, and e-commerce features. Implemented responsive UI components and optimized user experience across desktop and mobile devices. Collaborated with stakeholders to align branding, content structure, and technical implementation goals.
Senior Full-Stack Developer at BairesDev
May 1, 2023 - Present
Developed and maintained multiple internal enterprise platforms focused on operational workflows, analytics, employee management, and business process automation. Specialized in frontend architecture using Angular and backend development using C# and SQL Server within agile teams. Collaborated with product owners, designers, and engineering teams to deliver scalable and maintainable business applications. Contributed to R&D initiatives by evaluating technical solutions, improving internal tooling, and supporting fast product iterations. Implemented reusable frontend components, state management patterns, reporting dashboards, and data visualization modules.
Project Lead - System Analyst and Frontend Developer at Grupo Laurel
February 1, 2023 - October 1, 2023
Loan Management System Project Lead - System Analyst and Frontend Developer. Developed an online loan management platform for microcredit operations, payment distribution, and interest tracking. Designed administrative modules for customer management, financial reporting, and operational monitoring. Improved internal workflow organization by centralizing client and payment information into a unified system.
Loan Management System Project Lead - System Analyst and Frontend Developer at Grupo Laurel
February 1, 2023 - October 1, 2023
Developed an online loan management platform for microcredit operations, payment distribution, and interest tracking. Designed administrative modules for customer management, financial reporting, and operational monitoring. Improved internal workflow organization by centralizing client and payment information into a unified system.
Project Lead - System Analyst and Frontend Developer (Administrative & Accounting System; Digital Invoice System) at Instituto de Estudios Avanzados
April 1, 2020 - February 1, 2022
Developed a comprehensive administrative platform including accounting, payroll, inventory, invoicing, and budgeting modules. Designed business workflows and database structures to support institutional administrative operations. Implemented reporting and financial control features to improve operational visibility and efficiency.
Project Lead - System Analyst and Frontend Developer at Instituto de Estudios Avanzados
April 1, 2020 - February 1, 2022
Administrative & Accounting System; Digital Invoice System. Developed a comprehensive administrative platform including accounting, payroll, inventory, invoicing, and budgeting modules. Designed business workflows and database structures to support institutional administrative operations. Implemented reporting and financial control features to improve operational visibility and process efficiency.
Project Lead - System Analyst and Frontend Developer at Camas American
October 1, 2019 - February 1, 2020
Built a material requirements planning (MRP) system focused on production control, inventory, purchasing, and sales operations. Developed operational modules that supported manufacturing workflow management and business reporting.
Production & MRP System Project Lead - System Analyst and Frontend Developer at Camas American
October 1, 2019 - February 1, 2020
Built a material requirements planning (MRP) system focused on production control, inventory, purchasing, and sales operations. Developed operational modules that supported manufacturing workflow management and business reporting.
Systems Analyst and Frontend Developer at Dottcode
January 1, 2018 - June 1, 2023
Analyzed, designed, and developed custom business systems for international clients across multiple industries. Built scalable web and mobile applications and database architectures using Angular, PHP, SQL Server, and Ionic Framework. Designed relational database models and implemented administrative platforms tailored to client operational workflows. Collaborated directly with stakeholders to gather requirements, define technical solutions, and improve software usability.
Senior Frontend Engineer at Delta Tracking
December 1, 2016 - June 1, 2023
Led frontend development initiatives for GPS tracking platforms used for monitoring, reporting, and operational management. Supervised frontend development workflows and collaborated with multidisciplinary teams to deliver web and mobile solutions. Developed Angular and Ionic applications for Android and iOS, including deployment and maintenance across mobile app stores. Contributed to UI standardization, application architecture improvements, and frontend performance optimization efforts. Supported technical decision-making processes and mentoring activities within the frontend development team.

Education

B.S. in Systems Engineering, Computer Science and Informatics at Universidad Mesoamericana
January 1, 2014 - January 1, 2018
B.S. in Systems Engineering, Computer Science and Informatics at Universidad Mesoamericana
January 1, 2014 - January 1, 2018

Qualifications

React: From Zero to Expert (Hooks and MERN)
January 1, 2024 - June 15, 2026
Angular Realtime Applications with Sockets and REST
January 1, 2021 - June 15, 2026
Ionic 6+: Create iOS, Android and PWA Applications with Angular
January 1, 2021 - June 15, 2026
REDUX in Angular with NgRx: From Basics to Practice
January 1, 2021 - June 15, 2026
iOS and Swift 5.5 Complete Course
January 1, 2020 - June 15, 2026
Flutter Development Guide for iOS and Android
January 1, 2020 - June 15, 2026
Project Management Diploma
January 1, 2016 - June 15, 2026
Enactus Academy Project Management Training
January 1, 2016 - June 15, 2026
React: From Zero to Expert (Hooks and MERN)
January 1, 2024 - June 15, 2026
Angular Realtime Applications with Sockets and REST
January 1, 2021 - June 15, 2026
Ionic 6+: Create iOS, Android and PWA Applications with Angular
January 1, 2021 - June 15, 2026
Redux in Angular with NgRx: From Basics to Practice
January 1, 2021 - June 15, 2026
iOS and Swift 5.5 Complete Course
January 1, 2020 - June 15, 2026
Flutter Development Guide for iOS and Android
January 1, 2020 - June 15, 2026
Project Management Diploma
January 1, 2016 - June 15, 2026
React: From Zero to Expert (Hooks and MERN)
January 1, 2024 - June 30, 2026
Angular Realtime Applications with Sockets and REST
January 1, 2021 - June 30, 2026
Ionic 6+: Create iOS, Android and PWA Applications with Angular
January 1, 2021 - June 30, 2026
REDUX in Angular with NgRx: From Basics to Practice
January 1, 2021 - June 30, 2026
iOS and Swift 5.5 Complete Course
January 1, 2020 - June 30, 2026
Flutter Development Guide for iOS and Android
January 1, 2020 - June 30, 2026
Project Management Diploma
January 1, 2016 - June 30, 2026

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Manufacturing, Education
    Remittance Management System - Guatemala Express

    • Led the development of a remittance management platform for beneficiary tracking, reporting, document management, and
    operational control processes.
    • Designed frontend workflows and database structures to centralize administrative and financial information.
    • Developed reporting and control modules that improved operational traceability and reduced manual administrative tasks.

    Commercial Sports Website - Xrossover Sports

    • Designed and developed a commercial website including informational pages, blog functionality, and e-commerce features.
    • Implemented responsive UI components and optimized user experience across desktop and mobile devices.
    • Collaborated with stakeholders to align branding, content structure, and technical implementation goals.

    Loan Management System - Grupo Laurel

    • Developed an online loan management platform for microcredit operations, payment distribution, and interest tracking.
    • Designed administrative modules for customer management, financial reporting, and operational monitoring.
    • Improved internal workflow organization by centralizing client and payment information into a unified system.

    Administrative & Accounting System. Digital Invoice System - Instituto de Estudios Avanzados

    • Developed a comprehensive administrative platform including accounting, payroll, inventory, invoicing, and budgeting modules.
    • Designed business workflows and database structures to support institutional administrative operations.
    • Implemented reporting and financial control features to improve operational visibility and process efficiency.

    Production & MRP System - Camas American

    • Built a material requirements planning (MRP) system focused on production control, inventory, purchasing, and sales operations.
    • Developed operational modules that supported manufacturing workflow management and business reporting.