Javier Álvarez
Software Engineer III - Search at Mapbox
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolJavier Álvarez is a seasoned search and backend engineer with 14 years of experience building high-scale systems across video streaming, automotive navigation, ride-hailing and food delivery domains. Currently a Software Engineer III at Mapbox after serving as Staff Engineer and technical lead for Delivery Hero’s Global Restaurant Search, he has driven measurable impact—reducing latency 30% and improving Japanese search NDCG by 46% using LLMs and data-driven ranking fixes. He blends deep systems skills in Java and modern C++ with hands-on experience in Kubernetes, Terraform, GCP, Elasticsearch/Lucene and production observability, and has rebuilt architectures (Lucene WFST POC) and resolved long-standing memory leaks and hundreds of security issues. Beyond coding, he’s led hiring and interview calibration, run SRE onboarding, and acted as an engineering manager substitute, making him a reliable technical leader in teams of 100+. He likes pragmatic tooling for rapid prototyping (Python, bash) and has a history of shipping embedded-to-cloud solutions—from IVI C++ to cloud-native search pipelines—bringing perspective few backend engineers possess.
14 years of coding experience
13 years of employment as a software developer
Developing applications for mobile devices (100 hours), Computer Science, 10, Developing applications for mobile devices (100 hours), Computer Science, 10 at Summer School - Complutense University of MadridMaster of Engineering - MEng, Computer Science, 7,58/10, Master of Engineering - MEng, Computer Science, 7,58/10 at Universidad Complutense de Madrid
Spanish, English, Japanese
Stackoverflow
1reputation
0reached
0answers
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Github contributions (5)
javieku/mini-miner
Oct 2017 - Nov 2024
Contributions:40 pushes, 1 branch in 7 years 1 month
BlindFaithGames/blind-faith-games
Oct 2011 - Jun 2012
Contributions:108 commits in 7 months
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