About Carlos Castillo: Software Engineer
I'm a software engineer with more than 10 years designing frontend and backend systems with Angular, TypeScript, Spring Boot and PostgreSQL.
Today I own complete features, from the data model to the interface in production, and I use AI tools (Figma → Claude → Code) to ship faster without lowering the bar on reliability, accessibility or performance.
10+
Years of experience
2
AWS training badges
UTC−5
Working hours that overlap with the US
ES · EN
Native Spanish · B2 English
Experience
My story so far
Most recent first. Full history on LinkedIn.
Jan 2026 — present
Software Engineering Consultant · Immunochain
I contribute directly to the platform's look and behavior, and to technical decisions on architecture and data modeling.
2025 — present
Founder and sole developer · KMApp
Product, frontend, backend, data and infrastructure for a multi-tenant SaaS used by kiosks and restaurants. I designed, built and run it end to end.
Jun 2024 — Jan 2026
Frontend Developer · Tecnofactory
I helped build a public procurement platform used by Colombian government applications to manage state purchasing processes. I helped cut manual contracting steps and the related paperwork by 60%.
How I work
The principles I build by
Reliable by default
Systems that handle thousands of requests with 99.9% uptime.
Ship every week
Progress deployed every week, so decisions are made on real software.
Accessible and fast
Interfaces that pass accessibility checks and load fast: users and SEO depend on it.
AI-assisted, human-accountable
AI speeds up the work; I review, test and take responsibility for every line that reaches production.
Tools & skills
What I work with
- Frontend — Angular, TypeScript, Tailwind CSS, GSAP
- Backend — Java, Spring Boot, REST APIs
- Data — PostgreSQL
- Authentication — Keycloak, JWT, OAuth2
- Deployment — Docker, GitLab CI, AWS
- Design & AI — Figma, Claude
Certifications
AWS training badges
Verifiable on Credly.
AWS Cloud Quest: Cloud Practitioner
Training badge · Credly
Verify: AWS Cloud Quest: Cloud Practitioner(opens in a new tab)
AWS Knowledge: Cloud Essentials
Training badge · Credly
Verify: AWS Knowledge: Cloud Essentials(opens in a new tab)
Key facts
At a glance
Education
Software EngineerPolitécnico Grancolombiano2024
- Profile
- Software engineer, 10+ years of experience in IT · Fullstack
- Core stack
- Figma, Angular, TypeScript, Java / Spring Boot, PostgreSQL, Docker, AWS
- Location
- Colombia · UTC−5, working hours that overlap with the US
- Work mode
- Remote · Full-time or contract
- Languages
- Spanish (native) · English (B2)
- Availability
- Open to new opportunities