Cástulo Londoño
Web Developer Backend (eFX Trading) at https://ingenium.trading/
Bratislava, Region of Bratislava, Slovakia
Summary
👤
Senior🎓
Top SchoolCástulo Londoño is a seasoned backend-focused web developer with over two decades of experience building and modernizing enterprise-grade Java systems, currently shaping high-performance eFX trading services using OpenJDK 21, Kotlin, Spring and Keycloak. He combines deep Java expertise—having led large migrations from Oracle Java to OpenJDK and remediated security and compatibility issues—with hands-on cloud and automation work using Azure Functions, Power Platform and various integration tools. Comfortable across mobile, web and server stacks, he has delivered everything from Android apps and digital libraries to responsive eCommerce and banking platforms, often as an on-site consultant in international teams. Notably, he reduced a rule-engine processing time from five minutes to 30 seconds by recombining Microsoft Flows with Java Azure Functions, demonstrating both systems-level thinking and pragmatic optimization. Based in Bratislava, he pairs full-stack fluency (React/Angular, Spring/Hibernate, MariaDB/Oracle) with a long history of agile delivery, code security analysis and platform modernization. His GitHub showcases practical Android and utility projects, reflecting a developer who still builds and experiments alongside enterprise consultancy.
9 years of coding experience
22 years of employment as a software developer
Slovak Language and Literature, Slovak Language and Literature at OIM SlovakiaSystem Engineer Computer Science, System Engineer Computer Science at Universidad EAFIT
English, Spanish, Slovak, German
Stackoverflow
11reputation
343reached
4answers
0questions
Github Skills (33)
androidx6
android6
graph6
java6
json6
mailchimp-api-v36
mailchimp6
javascript6
kotlin5
mvc2
spring-data2
spring2
spring-boot2
ocr1
puzzle1
Programming languages (2)
Github contributions (5)
castuloramirez/challenges
May 2019 - Feb 2021
Android Challenges :) .
Contributions:33 commits, 4 PRs, 31 pushes in 1 year 9 months
kotlinjavaandroidandroid-challenges
castuloramirez/springbootrestdemo
May 2020 - Nov 2021
Contributions:1 PR, 22 pushes, 3 branches in 1 year 6 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.