Systems thinking
Clean architecture, traceable technical decisions, and services built to be maintained.
Building software for the travel industry
Hi, I’m
Cristian
Castillo.
Junior Software Engineer · Backend, architecture, and digital products
A junior software engineer turning complex problems into clear, reliable products that are ready to grow.
2026Now
Explore my journey
BASED INBogota D.C., Colombia◎
01 / Selected experience
Work with intention.
- 01
Apr 2026 - Present
Junior Software Engineer
Amadeus · Bogota, Colombia
Currently working as a Junior Software Engineer at Amadeus, contributing to technology products for the travel industry.
- 02
Jan 2026 - Mar 2026
Software Developer (Project-Based)
EduSinapsis · Remote
Designed and implemented ai-assets-api in a microservices monorepo using Hexagonal/Clean Architecture (application, domain, infrastructure). Built use cases with Repository and Dependency Injection patterns, versioned asset flows (`v000N`), and rollback-safe persistence. Implemented a deterministic build pipeline (esbuild + Tailwind) for AI-generated ZIP assets with strict validations (path traversal, blocked files, allowed extensions), CSP injection, and secure bridge communication (`postMessage`) for sandboxed iframe execution. Integrated GCS/local storage adapters, MongoDB metadata, and gateway access patterns.
- 03
May 2025 - Dec 2025
Junior Software Developer
JerreJerre · Bogota, Colombia
Development and maintenance of Python scripts for ETL processes. Web development with Next.js, large-scale data validation, use of Docker and DDEV, and teamwork under agile methodologies.
- 04
Aug 2023 - Apr 2025
Technical Support Specialist
TP · Remote - Bogota, Colombia
Provided remote support for a leading U.S. technology company (hardware, software, accounts, and cloud). Met strict KPIs, worked with technical documentation, and strengthened technical English.
- 05
Feb 2017 - Dec 2018
Software Developer
SENA · Bogota, Colombia
Developed an academic management system to create and grade tests with role-based access for teachers and students, using C# and SQL.
02 / In a nutshell
I build with clarity.
Systems Engineering student and Junior Software Developer with practical experience building software from idea to production: architecture decisions, backend implementation, secure integrations, and delivery. I have worked on microservices with hexagonal/clean architecture, deterministic build pipelines, ETL/data workflows, and web products with Next.js + TypeScript. My background in technical support strengthened incident resolution, KPI ownership, and communication with technical and non-technical stakeholders.
End-to-end delivery
From discovery to secure delivery: APIs, data, integration, and quality.
Collaboration that unblocks
Bilingual technical communication, problem focus, and ownership of the result.
03 / Core stack
Technology in service of product.
LANGUAGES & DATA
PythonAdvanced
JavaScript / TypeScriptIntermediate
PostgreSQL / MySQLIntermediate
Java / C#Basic (Academic)
WEB & PLATFORM
Next.jsIntermediate
AstroIntermediate
Strapi (CMS)Basic
REST APIsIntermediate
Linux (GNU/Linux)Advanced
Git / GitHubAdvanced
Docker / DDEVIntermediate
Hexagonal Architecture / Clean ArchitectureIntermediate
Repository + Dependency Injection + CoRIntermediate
WAYS OF WORKING
Agile Methodologies (Scrum)Advanced
Data ProcessingAdvanced
Technical CommunicationAdvanced
Problem SolvingAdvanced
04 / Education & credentials
Always learning.
Education
2023 - Present
B.Sc. in Systems and Computing Engineering (70% completed)Universidad Nacional de Colombia · Bogota, Colombia2022
Diploma in Web DevelopmentUniversidad Tecnologica de Pereira · Pereira, Colombia2017 - 2018
Technical Degree in Software ProgrammingServicio Nacional de Aprendizaje (SENA) · Bogota, ColombiaCertifications
C2 Proficient
EF SET English Certificate 84/100CERTIFIED
Introduction to Applied Data ScienceUniversidad de los Andes (Coursera)Languages
SpanishNativeEnglishC1 (EF SET)
05 / CONTACT