Jack Farrelly
Software Search Engineer at SoundCloud
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolJack Farrelly is a Software Search Engineer with 12 years of backend experience, currently shaping SoundCloud’s search architecture for hundreds of millions of documents. He specialises in building highly available, well-tested systems and fault-tolerant indexing pipelines using Scala, Elasticsearch/Lucene, Spark, Kafka, and Kubernetes, with strong monitoring and CI/CD practices. His work blends classic IR—relevance, ranking and custom Elasticsearch plugins—with ML-based re-ranking and practical NLP, enabling rapid server-driven search feature iteration across web and mobile. Comfortable across cloud data platforms (BigQuery/GCP) and diverse datastores, he also brings prior full-stack and embedded experience (C++, PHP, PCB design), which informs pragmatic system and API design. Based in Berlin, Jack pairs deep technical craft with a focus on observability and data-driven relevance experimentation.
12 years of coding experience
4 years of employment as a software developer
Bachelor's degree Computer Science, Bachelor's degree Computer Science at The University of Manchester
Stackoverflow
53reputation
5kreached
0answers
1question
Github Skills (109)
opensearch10
relevance10
http10
http-client10
elasticsearch10
rest-api10
non-blocking10
reactive10
blocking10
elasticsearch-plugin10
search-engine10
java10
scala10
circe10
toggle10
Programming languages (8)
Github contributions (5)
jackpf/PiLCD
Apr 2014 - Aug 2014
Contributions:69 commits in 3 months
jackpf/kraken-scheduler
Jul 2022 - Mar 2025
Contributions:7 releases, 12 reviews, 50 PRs in 2 years 7 months
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