Alexander Ignatyev
Staff Software Engineer at MongoDB
Stony Stratford, England, United Kingdom
Summary
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Rockstar🎓
Top SchoolAlexander Ignatyev is a Staff Software Engineer with 16 years of experience building and optimizing large-scale query and search systems, currently focusing on query optimization at MongoDB. He brings deep expertise in information retrieval and low-level systems work across C#, C++ and Python, with a track record at Microsoft, Bloomberg and Yandex. His open-source contributions include performance improvements to MongoDB’s aggregation engine—optimizing the $cond expression and SBE plan sizing—which reflect a knack for squeezing latency and cost out of complex execution paths. Past roles span high-frequency trading systems, distributed MapReduce platforms, and real-time search index features, showing an unusual blend of financial-domain rigor and database internals. Based in the UK, he combines production-grade engineering with an appetite for algorithmic problem solving and performance micro-optimization.
15 years of coding experience
18 years of employment as a software developer
Computer Science, Computer Science at Dorodnicyn Computing Centre of RASKazan State University
Stackoverflow
1reputation
0reached
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Github Skills (12)
aggregation-framework10
databases10
query-optimization10
c-language10
cprogramming-language10
mongodb10
mongodb-database10
database10
data-structure9
algorithm9
data-structures9
algorithms9
Programming languages (10)
Github contributions (5)
mongodb/mongo
Aug 2021 - Jan 2023
The MongoDB Database
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:74 commits, 2 PRs, 1 branch in 1 year 5 months
Contributions summary:Alexander's contributions focused on optimizing the performance of the `$cond` aggregation expression within the MongoDB database. They improved the query optimizer for constant conditions, leading to better performance. The work involved code changes in the expression evaluation and optimization stages. The user also added functionality for calculating compile-time sizes of SBE plans and improved existing tests.
nosqlc-plus-plusmongodb-databasedatabasemongodb
aligusnet/cdn
Jun 2018 - Apr 2024
Contributions:15 pushes in 5 years 10 months
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