Birthdays Hub
A web app to track your friends' birthdays on a calendar so you never miss one. Add contacts and get a clear view of upcoming celebrations.
Daniel León
Frontend Developer & Systems Engineer
I build fast, accessible interfaces and like knowing how things work — from the browser down to the server.
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- uptime:
- frontend since 2022
- users:
- 20,000+ students / semester
- honors:
- Cum Laude
- loc:
- Colombia
About
I'm Daniel Alejandro León Ortiz, a Systems Engineer (Cum Laude, Universidad Industrial de Santander) who builds web interfaces with React, Angular and TypeScript. At DTIC UIS I build and maintain the university's admissions frontend, used by 20,000+ applicants every semester, along with reusable Angular Material components shared across institutional modules.
I care about the details people feel but rarely notice: accessibility, performance, and interfaces that behave predictably. I write tests, keep components small and reusable, and use AI tools to move faster — while making sure I understand every line I ship.
Outside of work, Linux is my daily driver and I tinker with a small homelab — it keeps me curious about what happens below the browser.
Languages
- Spanish
- native
- English
- professional working proficiency · TOEFL iBT 94/120 (2022)
Now
- learning
- Strengthening the web fundamentals — HTML, CSS, JavaScript and how the browser really works — instead of just stacking frameworks.
- studying
- Exploring different branches of computer science on the way to a master's degree.
- homelab
- Learning self-hosting and server administration on my ThinkPad T480 homelab.
- status
- Open to remote frontend roles (US / LATAM / EU time zones).
last updated:
Experience
– present
Frontend Engineer @ DTIC UIS
- Built the admissions frontend serving 20,000+ students per semester.
- Designed reusable Angular Material components across multiple institutional modules.
- Implemented unit testing with Karma and Jasmine in a Scrum team.
–
Systems Engineering Intern @ APL Ingeniería
- Developed a web platform for performance-indicator analysis and visualization using Scrumban.
- Led the frontend implementation of authentication, user/role management and interactive dashboards.
- Wrote unit and component tests with Vitest, Jest and Testing Library.
Projects
Skills
core/
- TypeScript
- JavaScript
- HTML5
- CSS
frameworks-and-libraries/
- React
- React Router
- Angular
styling-and-ui/
- Tailwind CSS
- Sass
- shadcn/ui
- Framer Motion
tooling-and-testing/
- Vite
- Vitest
- Bun
- ESLint
- Git
- GitLab
- Vercel
linux-and-self-hosting/
- Linux
- Bash
- Docker
ai-tools/
- Claude Code
Education
–
Bachelor of Systems Engineering
–
Academic Exchange in Computer Science
The lab
dalo@raider
- Host:
- MSI GE75 Raider
- Role:
- daily driver · work & experiments
- OS:
- CachyOS
- WM:
- Hyprland
- Shell:
- Noctalia
dalo@thinkpad
- Host:
- ThinkPad T480
- Role:
- homelab · self-hosting & tinkering
- OS:
- Ubuntu Server
Services:
- immich
- self-hosted photo & video backup (my own Google Photos)
- file-browser
- web file manager to access and share files
- crafty
- runs and manages Minecraft servers
Before moving to Noctalia, I built my own rice to learn how a Hyprland desktop fits together: crimson-mocha-dots (Catppuccin Mocha Red)
Get in touch
Have a project in mind or just want to say hi? Feel free to reach out.
- dalodev@proton.me
- github
- github.com/dalo-dev
- linkedin.com/in/dalodev