Jay Miller
Senior Software Engineer at Marble.xyz
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolJay Miller is a Senior Software Engineer in New York with 11 years building high-throughput, cloud-native systems spanning distributed systems, databases, big data, and ML. He currently owns a Kubernetes- and AWS-backed PaaS for multi-tenant EVM indexing at Marble.xyz, and built a Rust-based Ethereum RPC proxy that achieves 80–90% cache hit rates while handling thousands of requests per second. His background includes founding engineering at Operator and performance-focused open-source work on Apache DataFusion, where he benchmarked and optimized sort execution and added zero-parameter UDF support. Comfortable across TypeScript, Rust, and IaC (CDK), he combines platform ownership with hands-on incident response and cost optimization. Trained in applied math, statistics, and CS at Johns Hopkins, he brings a quantitative mindset to system design and performance tuning. An engineer who oscillates between deep low-level optimization and pragmatic platform productization, he surfaces measurable gains in latency and operational cost.
11 years of coding experience
8 years of employment as a software developer
Johns Hopkins University
English
Github Skills (14)
fusion10
query-engine10
benchmarking10
rust10
benchmark10
sql10
arrow-js9
data-structure9
arrows9
arrow-keys9
algorithm9
data-structures9
algorithms9
big-data8
Programming languages (6)
Github contributions (5)
apache/datafusion
Nov 2022 - Apr 2023
Apache DataFusion SQL Query Engine
Role in this project:
Backend Developer
Backend DeveloperContributions:29 reviews, 13 PRs, 84 comments in 5 months
Contributions summary:Jay's primary contribution involves benchmarking and optimizing the `SortExec` and `SortPreservingMergeExec` functionalities within the Apache DataFusion SQL query engine. They added benchmark cases for different data types and scenarios. Furthermore, they contributed to UDF functionality, specifically, implementing zero-parameter UDFs. These contributions indicate a focus on performance optimization and extending the capabilities of the query engine.
querypythonquery-enginedataframerust
operatorlabs/chaindexer
Feb 2023 - Mar 2023
Contributions:24 commits, 16 pushes in 13 days
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