Available for opportunities

Freddy Saez

Frontend Engineer — React & TypeScript.
Full-stack and leadership experience.

I build interfaces that stay fast and codebases that stay sane. Currently CTO at Harbour.Space University in Barcelona — still shipping production code every week. Now looking for a frontend engineering role in Berlin.

EU citizen· Barcelona → Berlin· No visa sponsorship needed· Fluent English

View my work Get in touch

7+

years writing code

10+

products shipped

500+

algorithm problems solved

10th

place, ICPC Caribbean finals

01 — About

I started coding at 15 because I liked solving hard problems. Competitive programming gave me strong fundamentals, so I don't just copy patterns — I understand what's happening underneath.

Over time I moved from algorithm contests to building real products: CRMs, internal platforms, multiplayer experiments, university systems. Things people actually use.

I've worked as a frontend developer, a full-stack engineer, and now CTO at Harbour.Space University. Titles are fine, but at the end of the day I still like building — I stay hands-on and design things properly from the start so they don't turn into a mess later.

No drama, no overengineering, no magic. Just clean systems that make sense.

02 — Experience

Aug 2025 — present current

Chief Technology Officer

Harbour.Space · Barcelona, Catalonia, Spain

Technical lead for the university's digital platform. I run a [N]-person engineering team and own [X] internal systems — admissions, academic operations, and the public site — used by [Y] students and staff daily. Still hands-on: I review every architecture decision and ship production code weekly.

Technical leadership · Laravel · Vue.js · Next.js · DevOps

Jan 2025 — Aug 2025

Full-stack Developer

Harbour.Space · Barcelona, Catalonia, Spain

Built and maintained internal and public-facing web applications for the university — Laravel and Vue.js on the stack, MySQL underneath. Promoted to CTO after seven months.

PHP · Laravel · Vue.js · MySQL

Feb 2024 — Jan 2025

Full-time Computer Science studies

Harbour.Space University · Barcelona, Catalonia, Spain

Paused full-time work to study Computer Science full-time — algorithms, systems, and frontend engineering — while building side projects.

Algorithms · Data structures · Systems · Frontend engineering

Feb 2023 — Feb 2024

Frontend Developer

DixBase · Remote

Built and maintained the frontend of DixBase's core product with React and TypeScript — component architecture, REST API integration, and rendering performance.

React · TypeScript · CSS · REST APIs

Mar 2022 — Apr 2023

Front-end Developer

Xetid · Cuba

Developed frontend interfaces for government and public-sector platforms — my first production work, shipped under real constraints.

Bootstrap · JavaScript · PHP · CSS · HTML

Education

2024–now Computer Science and Front-end Development, Harbour.Space University

2022–23 Computational Science, Universidad Central "Marta Abreu" de Las Villas

03 — Selected work

01Phende CRM

live ↗

Phende CRM logo

Problem

Most CRMs assume a sales team clicking through dashboards. Developers want to automate their pipeline — and the API is usually an afterthought.

What I built

A full SaaS CRM with an API-first core: Laravel and Vue.js, MySQL, Docker deployments. External forms, webhooks, and a clean REST API so every workflow can be scripted.

Result

Live at phende.es and running in production — the contact form on this very site is a Phende external form.

Laravel · PHP · Vue.js · Tailwind CSS · MySQL · Docker · CRM · SaaS

02WebGPU Solar System

github ↗ live ↗

WebGPU Solar System screenshot

Problem

Three.js's WebGPU renderer and TSL shaders are new enough that there are few real-world references for a complete scene built on them.

What I built

An interactive solar system: 8 planets, 23 moons and 3,000 asteroids with accurate orbital mechanics, procedural TSL shaders, a time-speed slider up to 10,000×, and a WASD free-fly camera.

Result

Runs in the browser at interactive frame rates on the WebGPU renderer. Live demo and full source available.

Three.js · WebGPU · TSL · JavaScript · Vite · Front-End

03Redblock Online

github ↗ live ↗

Redblock Online screenshot

Problem

Real-time multiplayer in the browser is unforgiving: every dropped frame and late packet is instantly felt by the player.

What I built

A multiplayer aim trainer — Next.js, TypeScript and Three.js on the client, with real-time state synchronization between players.

Result

Fast, playable, and open source. Built as a testbed for real-time systems and rendering performance.

Three.js · Next.js · TypeScript · WebGL · Multiplayer

More work

Game of Life — Written in C

A colorful, terminal-based implementation of Conway’s Game of Life written in C.

source ↗

Biblic — NPM Package

A CLI text adventure bringing biblical stories to life through meaningful choices.

source ↗

Pac-Man — Vanilla JS

A faithful recreation of the Pac-Man arcade game built with pure Vanilla JavaScript — no frameworks, no libraries.

source ↗

04 — Skills

Frontend Core

The day job. Component architecture, type-safe code, and interfaces that stay fast.

  • React
  • TypeScript
  • Modern JavaScript (ES6+)
  • Next.js
  • Three.js & WebGL
  • Tailwind CSS

Full-stack

Enough backend to own a feature end to end — API design, data modeling, deployment.

  • Laravel
  • PHP
  • Vue.js
  • MySQL & PostgreSQL
  • REST API design
  • Docker & CI/CD

Foundations

Competitive programming roots. I understand what the framework does underneath.

  • Algorithms & data structures
  • Competitive programming
  • System design
  • Browser internals & rendering
  • HTTP & networking
  • Performance profiling

Competitive record

ICPC Caribbean Finals — 10th place, 2023 proof ↗

National programming preselection — Selected at age 16, Cuba

ICPC Domino Challenge — 2nd place proof ↗

05 — Writing

Your first shader is mostly boilerplate

Eloquent is an ORM, not a schema designer

Layout, paint, composite: why transform is cheap and top is not

all posts →

06 — Contact

Let's talk.

If you're hiring frontend engineers in Berlin — or building something and want someone technical who actually cares — write me. I reply.

[email protected]

GitHub ↗ LinkedIn ↗