Leszek Gruchała
Staff Software Engineer, Data Platform
West Pomeranian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolLeszek Gruchała is a Staff Software Engineer with 13 years of experience building resilient data platforms and distributed systems, currently shaping data infrastructure at Crisp. He combines deep Scala expertise (ZIO, Akka) with practical cloud engineering—leading migrations to AWS, turning monoliths into multi-tenant services, and cutting infra costs by up to 70%. A hands-on leader and former Head of Engineering, he has driven performance wins like 80% faster page loads and reduced bug rates through rigorous processes and mentoring. Leszek is an active open-source contributor to the prominent ZIO library, having implemented syntax migrations and new combinators for async workflows. He often leverages GenAI tooling to accelerate delivery and uniquely blends econometrics background with engineering to translate complex data models into reliable business outcomes.
13 years of coding experience
12 years of employment as a software developer
Master Econometrics and computer science, Master Econometrics and computer science at Uniwersytet Szczeciński
Polish, English
Stackoverflow
2,330reputation
367kreached
20answers
2questions
java
top-5%
spring
top-5%
Github Skills (19)
asynchronous10
async10
zio10
scala10
effects10
functional-programming10
concurrency10
java9
spring9
stream9
es6-promise8
playframework6
typesafe6
ide6
sbt6
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.