Leszek Gruchała
Szczecin, West Pomeranian Voivodeship, Poland
Summary
👤
SeniorLeszek Gruchała is a seasoned software engineering leader specializing in data platforms and scalable back-end systems, currently a Staff Software Engineer at Crisp with 13 years of experience. He has steered backend architecture and platform modernization at Kensu, helping teams migrate to AWS, embrace multi-tenant designs, and strengthen security (Auth0, SOC2/GDPR) while cutting infrastructure costs and delivery timelines. Proficient in Scala ecosystems (ZIO, Akka, Play) and fluent in TypeScript and Python, he has hands-on experience across cloud-native back ends, data processing, and tooling. An active open-source contributor, he has made notable improvements to the ZIO library, including migrating syntax and adding the Schedule.unwrap combinator. Based in West Pomeranian Voivodeship, Poland, he champions measurable outcomes—such as a 70% reduction in AWS costs and an 80% improvement in page load times—by simplifying code and optimizing architectures. He holds a Master’s in Econometrics and Computer Science, blending analytical rigor with practical delivery to turn complex requirements into robust, auditable solutions.
13 years of coding experience
Stackoverflow
2,330reputation
367kreached
20answers
2questions
java
top-5%
spring
top-5%
java-8
top-5%
Github Skills (21)
asynchronous10
async10
zio10
scala210
scala10
effects10
functional-programming10
concurrency10
java-89
java9
spring9
stream9
es6-promise8
playframework6
typesafe6
Programming languages (7)
Github contributions (5)
zio/zio
Jan 2019 - Oct 2020
ZIO — A type-safe, composable library for async and concurrent programming in Scala
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 commits, 8 PRs, 7 comments in 1 year 9 months
Contributions summary:Leszek contributed to the ZIO project by migrating existing syntax and implementing new features related to option and get functionality. The user refactored code, including changes to `IO.scala`, `syntax.scala`, and `IOSyntax.scala`. They also added a new Schedule.unwrap combinator, improving the library's features for asynchronous programming.
functional-programmingqueuesstreamsasynchronicityasync
leszekgruchala/scala-fast-track
Feb 2015 - Oct 2017
Contributions:36 commits, 4 PRs, 28 pushes in 2 years 7 months
scalajsscalafastestfunctional-programming
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.