Sergio Bilello
Senior Staff Software Engineer at Coinbase
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolSergio Bilello is a senior staff software engineer and infrastructure strategist with over a decade building resilient, high-throughput systems for millions of users across fintech and real-time communications. He has a proven record of driving multi-year modernization efforts and cost-saving platform rewrites—most notably reducing AWS costs by 75% via Kubernetes and traffic management work at Zoom and cutting Glassdoor infrastructure costs by 50% through a novel sharding heuristic. Sergio blends hands-on backend and performance engineering (reactive microservices, load testing, capacity planning) with people leadership, mentoring principal-level engineers and owning SLO/error-budget roadmaps. An active open-source contributor, he’s enhanced Netflix’s DGS GraphQL framework to improve security and header handling—reflecting a practical focus on scalable data fetching in production. Based in San Francisco, he combines financial systems rigor with deep distributed-systems expertise and a knack for turning NP-hard problems into operational wins.
12 years of coding experience
15 years of employment as a software developer
Bachelor, Information Technology Engineering, Bachelor, Information Technology Engineering at Università degli Studi di PalermoMaster of Science in Computer Engineering, Computer Engineering, Master of Science in Computer Engineering, Computer Engineering at Politecnico di Torino
English, Italian
Stackoverflow
183reputation
21kreached
8answers
9questions
Github Skills (19)
kotlin10
wpgraphql10
java10
javas10
wordpress-graphql10
spring-boot10
graphql10
graphql-java10
http-header9
junit8
jtest8
google-maps-api6
jaxb6
google-maps6
jquery6
Programming languages (16)
Github contributions (5)
Netflix/dgs-framework
Apr 2021 - Jun 2021
GraphQL for Java with Spring Boot made easy.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 reviews, 8 commits, 5 PRs in 1 month
Contributions summary:Sergio primarily contributed to enhancing the `dgs-framework` library, focusing on GraphQL functionality with Java and Spring Boot. They implemented and extended the `executeAndExtractJsonPath` methods to support HTTP headers, which involved modifications to both Kotlin and Java code. Additionally, the user made code adjustments to include headers in the `executeAndGetDocumentContext` function and disabled introspection. These contributions aimed to improve the framework's flexibility and security.
spring-bootdgsgraphql-javaspringgraphql
sbilello/dummy_repo
Feb 2016 - Apr 2017
Contributions:97 pushes, 1 branch in 1 year 1 month
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