Alexandru Nedelcu
Chapter Lead, Engineering, Scala at ING
Bucharest Metropolitan Area Romania
Summary
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RockstarAlexandru Nedelcu is a seasoned Scala engineering leader with 15 years building low-latency, resilient web services and payment systems, currently Chapter Lead at ING where he helped deliver Romania’s instant payments. A long-time functional programming proponent, he authored Monix (now in the Typelevel incubator) and has contributed key, performance-focused fixes to the widely used Typelevel/cats library. He combines hands-on design and implementation of core components with team-level responsibilities for stack choices, code quality and remote-first engineering practices. His background spans high-throughput startups (serving tens of thousands TPS) to mission-critical JVM systems for energy and healthcare, often inventing pragmatic solutions for real-time state and protocol handling. Comfortable across Scala, Haskell influences, Akka, and TypeScript ecosystems, he emphasizes correctness, observability and craft under tight deadlines. Less obvious: he actively shapes developer culture through mob programming, informative reviews and public best-practice guidance.
15 years of coding experience
14 years of employment as a software developer
English
Stackoverflow
8,061reputation
1.8mreached
44answers
8questions
integer
top-5%
language-features
top-5%
generics
top-5%
queue
top-5%
decimal
top-5%
concurrency
top-5%
Github Skills (24)
scala10
applicative10
monads10
cat10
functional-programming10
java9
python9
multithreading9
integer9
queue9
concurrency9
decimal9
data-structures9
generics9
language-features9
Programming languages (23)
Github contributions (5)
typelevel/cats
Mar 2016 - Jul 2018
Lightweight, modular, and extensible library for functional programming.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 13 PRs, 129 comments in 2 years 3 months
Contributions summary:Alexandru made several contributions to the `cats` library, focusing on functional programming concepts. They implemented a change to make `Eval` covariant, added the `Applicative.unit` method, renamed `Eval.raise` to `Eval.raiseError`, and made `Kleisli` and `IndexedStateT` stack safe, improving the library's performance and usability. Additionally, they made some corrections to the documentation.
functional-programmingtagless-finalscalamodularextensible
alexandru/ro.alexn.org
Feb 2019 - Apr 2022
Contributions:3 PRs, 15 pushes, 12 branches in 3 years 2 months
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