SebasBaezCode
Sebastian Báez

Software Analyst

Senior Web Developer

Junior Project Manager

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  • Resume
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Sebastian Báez

Software Analyst

Senior Web Developer

Junior Project Manager

Download CV
Hello, I’m Sebastian Báez Software Analyst and Developer Web Developer

Senior Software Developer Specializing in React, Next.js, TypeScript, PHP.

5+

Years of
Experience

UI

Architecture &
Component Systems

API

Legacy Integration &
API Communication

About Me

I'm a Senior Front-End Developer focused on React.js, TypeScript, and Next.js, with a strong eye for clean architecture and practical solutions. I enjoy working on real-world problems, simplifying complex flows, and building UI systems that are easy to scale and maintain. I'm also used to testing my work with tools like Jest and Cypress, and I’m not afraid to dive into legacy PHP code when needed.

I’m hands-on, opinionated when necessary, and always curious. I work best when I understand the “why” behind a feature, not just the “what.” I’ve led small teams, contributed to product decisions, and shipped tools that real users rely on daily. Whether it’s creating a customizable widget for clients or improving DX in a monorepo, I focus on delivering without overengineering.

Portfolio

Home portfolio
Old Portfolio – Personal Portfolio Website
Branding, HTML, Vue.js, Website
Estimator Project Desktop
Home Renovation Cost Estimator
App, Software, Website
King Wash project
King Wash – Side Project
App, Branding, Laravel, Software, Vue.js, Website
chc project info
PICO – The credit score for homes
App, Software, Website
Ummami Home
Ummami Express – Online Food Ordering Platform
App, Branding, Laravel, Software, Vue.js, Website
Checkout integrations
Checkout & Billing Solutions
App, Branding, Software, Website
my maintenance project
My Maintenance – Home Maintenance Manager
App, Software, Website
web-desktop-flayer
Digital Flyers & Landing Pages Collection
Branding, HTML, JavaScript, Landing Page, PHP, Web Flayer, Website
Explore More Projects
Discover additional designs and creative solutions beyond the featured work.
View All Projects

Resume

Experience
2018 - Present
Developer Consultant
Sebasbaezcode | U.S and COL

My freelance experience has strengthened my ability to manage projects independently while continuously learning and adopting new technologies and agile methodologies.

Worked on a variety of side projects for clients, developing custom websites and applications using React.js, Vue.js, WordPress, and PHP, always focusing on delivering tailored and functional solutions.

Led end-to-end project delivery: planning, design, implementation, and maintenance.

Advised clients from various industries on improving UX, performance, and scalability.

Through managing multiple projects simultaneously, I honed my organizational and prioritization skills, improving team efficiency and client communication.

Continuously explored and adopted new technologies to deliver better solutions.

2020 - Present
Senior Web Developer
Kukun | United States (Remote)

Created and standardized a custom CSS library for a legacy real estate app, enabling faster UI updates and reducing ticket time.

Led migration from PHP to Next.js, improving deployment, scalability, and maintainability.

Rebuilt a PHP real estate estimator widget from scratch with a focus on customization, security, and clean code.

Developed a JS library for secure iframe postMessage communication with banks.

Rebuilt the corporate blog in WordPress, preserving legacy plugins and integrating external data sources, improving performance and SEO.

Collaborated with multicultural dev teams across India, Canada, the US, and more, adapting to diverse workflows and problem-solving approaches.

2018 - 2019
Front End Developer
Winketing | Bucaramanga, Colombia

Developed web interfaces, e-commerce, and corporate pages, ensuring visual and functional consistency across desktop and mobile.

Built a reusable component library using Vue.js and React, which streamlined the development process across multiple web projects with varying design requirements.

Implemented third-party API integrations to support dynamic features like smart forms, CRM connections, and auto-updated content sections.

Designed responsive user interfaces from scratch, working closely with designers to translate visual concepts into functional and scalable components.

Collaborated with non-technical roles (design, marketing, content) to align technical execution with client needs and business expectations.

2016 - 2017
Junior Java, .NET Developer
Campollo S.A | Bucaramanga, Colombia

Developed and maintained modules for the logistics system using C# and .NET.

Implemented inventory management improvements, optimizing system speed and accuracy.

Collaborated on new feature development and integrations with databases.

Conducted unit testing and optimized system performance.

Assisted in troubleshooting issues and improving production system stability.

Courses
Foundation Models & Generative AI — MIT OpenCourseWare
ONLINE

Explored the theory and practical applications of large-scale AI systems, including transformer architectures, prompt engineering, fine-tuning, and evaluation of generative models in real-world contexts.

Front-End Architecture & Performance
ONLINE | 15+ Specialized Courses

Comprehensive program focused on building scalable, maintainable, and high-performance web applications. Included advanced React patterns, state management, TypeScript, Next.js, performance profiling, and accessibility best practices.

Backend Architecture & Integration
ONLINE | 5+ Specialized Courses

Advanced training in server-side architectures, API design, and database optimization. Covered Node.js, Express, SQL/NoSQL databases, authentication, and scalable application deployment using Docker and cloud services.

Education
08/08/2018
Technologist in Analysis and Development of Information Systems
SENA | Bogotá

Comprehensive training in software analysis, design, development, and implementation, including programming in Java, C#, JavaScript, PHP, and SQL; database administration; UML modeling; and agile methodologies. Covered the full software lifecycle with a focus on quality, teamwork, and practical problem-solving.

Certificate
02/12/2015
Associate of Science — Computer Technician
SENA | Bogotá

Solid foundation in computer technology, covering hardware architecture, operating systems, and digital logic from binary fundamentals to system-level operation. Trained in hardware repair, network setup, and system configuration, with emphasis on the core principles that enable modern computing.

Certificate
Delivering creative and conversion-focused solutions for brands worldwide

Skills

Frontend Architecture
Frontend Architecture
Widget & Embeddable Solutions
Widget & Embeddable Solutions
API Integration & State Management​
API Integration & State Management​
UI/UX Customization & Theming
UI/UX Customization & Theming
Tool Stack
  • React / Next.js
    95%
  • TypeScript
    95%
  • Redux/Zustand
    95%
  • Node.js
    90%
  • PHP
    90%
  • Jest & Cypres
    80%
  • Tailwind
    95%
  • Craft.js & React-Konva
    80%
  • HTML
    100%
  • CSS
    100%
  • JavaScript
    95%
  • Wordpress
    85%
  • Docker
    70%
  • Google Cloud
    70%
  • AWS
    70%
  • Web Accessibility
    90%
Languages
  • Spanish
    100%
  • English
    90%
Soft skills
  • Technical Leadership
  • Strategic Project Planning
  • System Thinking
  • Code Review & Mentorship
  • Effective Communication
  • Problem-Solving & Critical Thinking
  • Collaboration Across Teams
  • Adaptability & Continuous Learning

My Blog

CONTACT

Phone
+57 3014577981
sebasbaezcode@gmail.com
Address
Bucaramanga, Santander, Colombia

Modern, scalable, and tailored web apps. Let’s talk!

    © 2025 Sebastian Báez – Web Developer – All Rights Reserved