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Available for new projects

I design and build that feels distinct.

I'm Brandon Sosa, a frontend developer and UX/UI designer. For seven years I've worked on both sides of the problem: the interface people see and the code that holds it up.

View work Let's work together
years of experience
7+ years of experience
working languages
2 working languages
Remoto
remote work with teams in Spain, the US and Colombia

Sección 01

Profile

3D illustration of Brandon Sosa smiling, wearing a grey hoodie
Based in
Medellín, Colombia
Working
Remote
Languages
Spanish, English
Status
Available

I work where design and code meet, which tends to be where projects fall apart.

I design the interface and then implement it. That means visual decisions reach the browser the way they were intended, without the lossy translation between a Figma file and a production component.

I specialise in maintainable React architectures and documented design systems. I treat accessibility (WCAG) and performance as project requirements, not as a cleanup phase at the end.

Download CV

Sección 02

Experience

Seven years across agencies and product teams, mostly remote.

  1. Front Developer

    Mirai

    Madrid, Spain · Remote

    Contract · Full time

    • React
    • Next.js
    • TypeScript
    • WCAG
    • Built scalable web interfaces with React, Next.js and TypeScript.
    • Implemented reusable components to improve code maintainability.
    • Improved accessibility and user experience following WCAG standards.

  2. UX/UI Developer

    Prediktia

    Boston, USA · Remote

    Contract · Full time

    • React
    • Vue.js
    • TypeScript
    • UX Design
    • Designed and optimised UX/UI experiences for web applications.
    • Frontend development with React, Vue.js and TypeScript.
    • Built responsive and accessible interfaces.

  3. Designer and Frontend Developer

    Doctus

    Medellín, Colombia

    Full time

    • Design
    • Frontend
    • Figma
    • Interface design and frontend development for web applications.
    • Worked with multidisciplinary teams to deliver quality solutions.

Sección 03

Stack

The tools I work with day to day, grouped by the problem they solve.

Front-End

Modern, responsive interfaces

  • React
  • Next.js
  • Angular
  • Vue.js
  • TypeScript
  • JavaScript
  • Astro
  • HTML / CSS
  • Tailwind CSS
  • Sass

Back-End

APIs and data

  • Node.js
  • Express
  • Python
  • REST

Design

User-centred design

  • Design systems
  • Prototyping
  • Accessibility (WCAG)
  • Responsive design
  • A/B testing

Tooling

Workflow and delivery

  • Figma
  • Adobe Suite
  • Git / GitHub
  • WordPress
  • DNN
  • Scrum / Agile

Sección 04

Services

Three ways to work together. They combine well, or stand alone.

01

UI/UX design

I turn vague requirements into clear flows. Research, wireframes, high-fidelity interface and a component system your team can keep using after I'm gone.

Includes

  • Figma and interactive prototyping
  • Documented design systems
  • WCAG accessibility audit
Request a quote

02

Web development

Sites and apps that load fast and age well. Semantic HTML, typed components and a codebase someone else can pick up without deciphering it.

Includes

  • React, Next.js, Astro, Tailwind
  • Technical SEO and Core Web Vitals
  • CMS and API integrations
Request a quote

03

Consulting

I review what you already have and tell you where users drop off. A prioritised report and a concrete roadmap, not a generic list of best practices.

Includes

  • UX and performance audit
  • Conversion optimisation
  • Support for your in-house team
Request a quote

Sección 05

Process

How I run a project, from the first call to handover.

  1. 01

    Discovery

    User research, competitor analysis and defining the metrics that actually matter. Understanding the why before the how.

    Methodology

    Scope document and KPIs

  2. 02

    Design and prototype

    Low-fidelity wireframes to lock the structure, then the high-fidelity interface. Short iterations on real feedback.

    Methodology

    Clickable Figma prototype

  3. 03

    Build and handover

    Implementation with clean, typed code. Responsiveness, accessibility and performance testing before going live.

    Methodology

    Production code and documentation

Sección 06

Selected work

A selection of recent projects.

E-commerce Dashboard

2025

Inventory management platform

Control panel for online store administrators, with real-time charts and order management.

  • React
  • Tailwind
  • Recharts
Code

NeoBank App

2024

Digital wallet

Personal finance app with custom categories, budgets and monthly reports.

  • React Native
  • TypeScript
  • Chart.js
Code
See everything on GitHub

Sección 07

Tell me what you have in mind

Send me a description of the project, even if it's still a rough idea. I reply within 24 working hours.

Taking on projects for next quarter.

Or email me directly

brandon@zektra.co

Elsewhere