Karol Król
Senior Software Engineer at Paramount
Warsaw, Masovian Voivodeship, Poland
Summary
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SeniorKarol Król is a Senior Software Engineer based in Warsaw with over a decade of commercial Java backend experience and nearly 20 years of programming practice. He specializes in designing high-performance, memory-efficient multithreaded server-side systems and relational database models within microservices architectures, particularly for media, telecommunications, and finance. At Paramount he focuses on scalable data denormalization and analytical tooling, bringing a practical eye for algorithm and process optimization. Comfortable mentoring small teams, Karol combines disciplined TDD and backend craftsmanship with familiarity in modern frontend technologies, making him effective across full-stack project boundaries. An early career path from testing to C/C++ and Java development gives him a strong systems perspective that informs robust, production-ready designs.
11 years of coding experience
English, Polish
Stackoverflow
3,420reputation
1.9mreached
53answers
6questions
java
top-5%
Github Skills (82)
java-streams9
java9
aurora7
database-management6
lambda6
intellij-idea6
dependency-management6
integer6
lazy-evaluation6
functional-programming6
spring-boot6
spring6
biginteger6
64-bit6
decimal6
Programming languages (4)
Github contributions (5)
kjkrol/kotlin4fun-eshop-app
Jun 2017 - Jun 2017
Contributions:6 PRs, 27 pushes, 6 branches in 24 days
kjkrol/calculator-javafx
Dec 2017 - Dec 2017
Contributions:2 PRs, 28 pushes, 2 branches in 5 days
simple-calculatorcalculatorcalculator-appjavafxjava
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