Vesa Kaihlavirta
Principal Developer at Rise Technologies Oy
Finland
Summary
👤
Senior🎓
Top SchoolVesa Kaihlavirta is a Principal Developer with 19 years of experience building cloud-native, automated systems and payment platforms from Finland. He blends hands-on back-end engineering—contributing notable BigDecimal work to the Crystal language—with strategic architecture roles across AI/ML, AWS, and telecom billing systems. Vesa has led automation and on-call readiness initiatives, reducing manual toil while shaping resilient 24/7 services. Comfortable moving between code and cloud, he’s delivered production systems at companies like Paytrail, Qvantel and Aiwo Digital, and now drives platform work at Rise Financial Group. Known for a pragmatic, slightly iconoclastic style, he prefers working with smart, motivated teams and values clear human communication (and a polite heads-up before phone calls).
19 years of coding experience
21 years of employment as a software developer
Bachelor of Science (BS) Information Technology, Bachelor of Science (BS) Information Technology at Jyväskylän yliopisto
Finnish, French, English
Github Skills (6)
bigdecimal10
crystal-lang10
testing10
compiler-compiler9
compiler9
programming-language8
Programming languages (19)
Github contributions (5)
crystal-lang/crystal
Aug 2017 - Nov 2017
The Crystal Programming Language
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:24 commits, 3 PRs, 80 comments in 2 months
Contributions summary:Vesa primarily contributed to the `BigDecimal` implementation within the Crystal programming language repository. Their work included adding tests for various arithmetic operations, edge cases for string conversions, and implementing conversions to other numeric types. They also refactored code for better structure, fixed edge cases in string representation, and addressed hashing contracts.
esoteric-languagecrystallanguage-designcompilerprogramming-language
vegai/chaos
Apr 2016 - Jul 2018
Contributions:1 PR, 101 pushes, 2 branches in 2 years 3 months
passwordxsalsa20metadata
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