Professional
8
Roles across commerce, gaming, real estate, martech, agencies, and SaaS.
Portfolio
Case studies from real teams, products, and constraints.
A curated look at the work behind my resume: software architecture, product systems, and hands-on technical leadership across US and LATAM teams.
Personal
3
Open-source and community work that sharpens how I build and lead.
Technologies
135
Recurring tools and platforms that show up across production systems.
Client and product work
Professional Work
Work delivered for product teams across commerce, gaming, SaaS, real estate, martech, and platform engineering.
Featured work Front End Developer
2025 Present
Smith Commerce
Rebuilt Marcone's storefront into a faster, more accessible headless experience, lifting Lighthouse from 35 to 98 while giving teams room to ship independently.
- Lighthouse score improved from 35 to 98
- Time to Interactive dropped by 75%
- 100% accessibility score on the rebuilt storefront
Professional work Senior Full Stack Engineer
2025 X Games
Built and scaled the official X Games digital platform — a high-traffic sports media site serving millions of fans — with real-time live streaming, geo-based access control, and a programmatic ad infrastructure powered by Google Ad Manager.
- 56+ pull requests merged across two codebases
- Real-time geo-based live stream access across global audiences
Professional work Technical Lead
2023 - 2025 Void.GG
Led architecture and delivery for a fast-moving esports platform across web, mobile, and backend systems, improving performance, release speed, and team velocity.
- 35% better system performance
- 60% faster deployments
Professional work Senior Full Stack Engineer
2021 - 2023 Optic Power
Shipped across gaming, SaaS, and martech products in parallel, improving API performance by 40% while supporting launches for Team Liquid, NurtureBoss, and Stardust.gg.
- 40% better API performance
- Multiple client launches in parallel
Professional work Technical Lead
2020 - 2021 PADS
Led the web, back-office, and mobile experience for a luxury real estate platform, growing monthly active users by 50% and improving broker workflows.
- 50% growth in monthly active users
- Connected web, broker, and mobile workflows
Professional work Front-End Lead
2018 - 2020 Datagran
Led the front-end modernization of an AI martech platform, cutting bugs by 30% while moving the product from jQuery to a scalable React and TypeScript architecture.
- 30% fewer bugs after the front-end migration
- React and TypeScript architecture replacing legacy jQuery surfaces
Professional work CTO & Co-Founder
2017 - 2018 Justbit.site
Co-founded a boutique software studio that shipped 10+ client launches in its first year and helped selected clients grow organic traffic by up to 70%.
- 10+ client launches in the first year
- Up to 70% organic traffic growth for selected clients
Professional work Junior Full Stack Developer
2014 - 2017 Nebular Technologies
Shipped client web, Android, and commerce products across Rails, AngularJS, Java, and WordPress, building the release discipline and full-stack range I still rely on today.
- Shipped across backend, frontend, mobile, and CMS work in one studio
- Built the foundation for later tech lead and full-stack roles
Personal builds
Personal Projects
Open-source, community, and self-directed projects that show how I like to learn, teach, and build beyond client work.
Personal project Creator
2024 Present
@santi020k/eslint-config-basic
Built a DX-first ESLint toolkit for JavaScript and TypeScript teams that want stronger defaults, less setup friction, and cleaner reviews.
- Used by 30+ developers across personal, client, and shared codebases
- Reduced repeated setup work for new projects and experiments
- Encoded strong defaults across React, Next.js, Astro, and monorepos
Personal project Creator
2023 - 2024 @santi020k/eslint-config-santi020k
Turned internal linting conventions into a reusable package that standardized React and TypeScript projects and paved the way for @santi020k/eslint-config-basic.
- Shared one reusable lint baseline across multiple React and TypeScript projects
- Reduced repeated setup work for new apps and experiments
Personal project Co-Organizer
2017 Present
ReactJS Colombia
Co-organize one of Medellin's most active React communities, sustaining free meetups and workshops that drew 100+ participants at peak sessions.
- Dozens of events since 2017
- 100+ participants at peak sessions
Technology map Browse the full stack index
The tools behind the work.
React and TypeScript sit at the center, but the stack widens to fit the product: testing, mobile, backend, DX, and delivery tooling.
Recurring technologies across the portfolio, ordered from the most interesting product-shaping tools to the more supporting ones.