Guillermo Orellana Ruiz
Software Engineer at Morse (formerly Sling Money)
Marbella, Andalusia, Spain
Summary
🤩
Rockstar🎓
Top SchoolGuillermo Orellana Ruiz is a seasoned software engineer with 16 years of experience specializing in mobile engineering, particularly Android, and a track record of improving performance, reliability and developer workflows at scale. He has driven major technical initiatives at companies like Skyscanner, Monzo, Qonto and Morse—reducing app startup times, migrating critical security APIs, and stabilizing CI and UI testing infrastructures. Comfortable both as an individual contributor and a technical leader, he has led cross-team coordination for regulatory and security deliveries and introduced Kotlin and architectural improvements that sped builds and reduced churn. Based in Marbella, he blends hands-on coding with practical product thinking—having built MVPs, proof-of-concepts for fundraising, and features that meaningfully boosted user engagement and reduced support load. An engineer who quietly invests in developer experience and mentoring, he pairs deep mobile craftsmanship with an appetite for solving ambiguous problems.
16 years of coding experience
9 years of employment as a software developer
Bachelor of Engineering (BEng) Telecommunications Engineering, Sound engineering, image engineering, acoustics, Bachelor of Engineering (BEng) Telecommunications Engineering, Sound engineering, image engineering, acoustics at Universidad de MálagaMaster in Internet Engineering, Telecommunications Engineering, Master in Internet Engineering, Telecommunications Engineering at Wrocław University of Science and TechnologyNanodegree, Android Developer, Nanodegree, Android Developer at Udacity
Spanish, English, German, Polish, French
Stackoverflow
734reputation
57kreached
10answers
7questions
Github Skills (200)
testing10
google-maps10
lottie10
coroutines10
kotlin-android10
intellij10
for-comprehension10
metaprogramming10
ktor10
polymorphism10
typed-lambda-calculus10
kotlin-multiplatform10
intellij-plugin10
code-editor10
monads10
Programming languages (14)
Github contributions (5)
wiyarmir/guillermoorellana.es
May 2013 - Nov 2022
My blog!
Contributions:96 commits, 3 PRs, 92 pushes in 9 years 7 months
my-blog
Skyscanner/gradle-time-logger-plugin
Mar 2019 - Jul 2019
Gradle plugin to log your build time
Contributions:1 release, 10 commits, 4 PRs in 4 months
gradleloggingbuild-timegradle-kotlin-dslgradle-plugin
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