Rafał Leszko
Lead AI Engineer at Livepeer
Krakow, Lesser Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolRafał Leszko is a Lead AI Engineer with 12 years of experience building real-time, scalable generative AI and cloud-native systems, currently leading Scope — a low-latency engine for interactive audio/video generation running advanced diffusion and LTX-2/ACEStep pipelines on RTX and H100-class GPUs. He bridges research and production, owning architecture, rapid prototyping, and both high- and low-level implementation in Python, Go, CUDA and PyTorch, and has shippped core video infrastructure across Livepeer Node, Catalyst and Livepeer Studio. Previously he led cloud integrations at Hazelcast and implemented microservice and blockchain components at Google and Livepeer, demonstrating deep distributed-systems and performance engineering skills. A prolific speaker (70+ conferences, including KubeCon) and author, he routinely takes projects from 0→1 and contributes to notable open-source efforts like the official Livepeer Go implementation. Based in Krakow and remote-first, Rafał combines academic rigor (PhD-level training) with hands-on systems craftsmanship focused on pushing real-time multimodal AI into production.
12 years of coding experience
14 years of employment as a software developer
Socrates Erasmus exchange program, Computer Science, Socrates Erasmus exchange program, Computer Science at Grenoble INP - UGADoctor of Philosophy (PhD), Computer Science, Doctor of Philosophy (PhD), Computer Science at AGH University of Krakow
English, Polish, French
Stackoverflow
5,123reputation
520kreached
250answers
1question
kubernetes
top-1%
kubernetes-helm
top-5%
Github Skills (16)
unit-testing10
kubernetes10
error-handling10
go10
back-end-development10
transcode9
kubernetes-helm9
hazelcast6
jenkins6
design-patterns6
minikube6
docker6
kubernetes-secrets6
spring-boot6
networking6
Programming languages (20)
Github contributions (5)
livepeer/go-livepeer
Nov 2021 - Dec 2022
Official Go implementation of the Livepeer protocol
Role in this project:
Back-end Developer
Back-end DeveloperContributions:693 reviews, 103 commits, 454 PRs in 1 year 1 month
Contributions summary:Rafał primarily focused on improving the Livepeer protocol's Go implementation. Their contributions included implementing error handling within the transcoding process to gracefully notify the orchestrator upon failure, preventing application crashes. Further work involved refactoring and adding unit tests to improve code quality and maintainability. They also addressed context cancellation issues and refined existing broadcast session logic to improve reliability.
goethereumvideo-streambroadcastingtranscode
PacktPublishing/Continuous-Delivery-With-Docker-and-Jenkins-3rd-Edition
Nov 2021 - Feb 2022
Continuous Delivery with Docker and Jenkins, 3rd Edition, published by Packt
Contributions:62 commits, 27 pushes in 3 months
continuous-deliverydockerjenkins
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