Jack Vanlightly
Senior Principal Technologist at Confluent
Barcelona, Catalonia, Spain
Summary
🤩
Rockstar🎓
Top SchoolJack Vanlightly is a Senior Principal Technologist based in Barcelona with 11 years of hands-on experience building and hardening distributed systems, messaging platforms, and storage backends. He currently shapes Confluent’s streaming strategy after a tenure as a distributed-systems researcher and technology strategist, bridging field ops, engineering, and product. Jack is a proven contributor to critical open-source infrastructure—most notably improving data integrity and recovery in Apache BookKeeper and contributing to Pulsar clients—combining formal verification with pragmatic fixes to prevent real-world data loss. His background spans RabbitMQ core work, database performance tuning, and production observability using rigorous methods, so he excels at diagnosing and fixing persistent operational issues. Colleagues rely on him for deep protocol knowledge, clear technical writing, and the ability to translate formal analysis into deployable system improvements.
11 years of coding experience
15 years of employment as a software developer
Bachelor of Science (BSc), Computer Science, Bachelor of Science (BSc), Computer Science at Cardiff University / Prifysgol Caerdydd
English, Spanish
Stackoverflow
1,449reputation
137kreached
50answers
2questions
rabbitmq
top-5%
Github Skills (22)
back-end-development10
data-integrity10
distributed-log10
distributed-systems10
apache10
data-structure10
java10
apache-bookkeeper10
javas10
data-structures10
algorithms9
big-data9
performance-optimization9
rabbitmq9
testing8
Programming languages (11)
Github contributions (5)
apache/bookkeeper
Mar 2021 - Aug 2022
Apache BookKeeper - a scalable, fault tolerant and low latency storage service optimized for append-only workloads
Role in this project:
Back-end Developer
Back-end DeveloperContributions:67 reviews, 19 commits, 15 PRs in 1 year 4 months
Contributions summary:Jack primarily focused on improving the Apache BookKeeper's data integrity, performance, and reliability. They implemented and fixed issues related to ledger recovery processes to prevent data loss, including the addition of fencing mechanisms in recovery reads. The user also worked on enhancing journal metrics, adding thread-scoped stats, and addressing issues related to ledger index rebuilds. Their contributions involved significant code changes within the bookkeeper-server module, dealing with data storage and integrity.
fault-tolerantapache-bookkeeperbookkeeperfaultstorage
Vanlightly/CDC-Tools
May 2018 - Dec 2018
Contributions:13 commits, 5 pushes, 1 branch in 7 months
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