Valerii Mironov
Co-Founder at SereneDB
Germany
Summary
🤩
Rockstar🎓
Top SchoolValerii Mironov is a systems-focused software engineer and co-founder with 7 years of experience building high-performance database and geospatial systems from the internals up. He has a strong track record at ArangoDB and YDB improving inverted-index memory use, query engines (WAND, top-k), and low-level storage robustness, and contributed performance and sanitizer-driven quality fixes to widely used repositories like ArangoDB and Google's s2geometry. At SereneDB he’s applying that expertise to make search significantly faster, drawing on prior wins such as a 3x speedup and 4x memory reduction for GeoJson/s2 serialization and up to 100x improvements on some wildcard queries. Past roles span real-time rendering and multithreaded primitives for map rendering on Vulkan/OpenGL, showing he thrives on low-level optimization across storage, compute and graphics stacks. He combines rigorous academic training in math and data infrastructure with a hands-on open-source ethos, often tackling subtle concurrency and sanitizer-detected bugs that others miss.
7 years of coding experience
5 years of employment as a software developer
Bachelor's degree Mathematics and Computer Science, Bachelor's degree Mathematics and Computer Science at Saint Petersburg State UniversitySoftware Engineering, Software Engineering at Computer Science CenterBig data infrastructure, Big data infrastructure at Yandex School of Data Analysis
Stackoverflow
1reputation
0reached
0answers
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Github Skills (20)
algorithm10
algorithms10
c-language10
databases10
data-structure10
performance-optimization10
nosql-database10
data-structures10
cprogramming-language10
database10
testing9
geometry9
debug9
debugging9
metric9
Programming languages (12)
Github contributions (5)
arangodb/arangodb
Nov 2021 - Jan 2023
🥑 ArangoDB is a native multi-model database with flexible data models for documents, graphs, and key-values. Build high performance applications using a convenient SQL-like query language or JavaScript extensions.
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:1995 reviews, 226 commits, 358 PRs in 1 year 2 months
Contributions summary:Valerii's commits primarily focused on enhancing and extending the functionality of the ArangoDB native multi-model database. This included significant work on the IResearch module, specifically adding new metrics for monitoring and refactoring existing metrics code. The contributions further involved improving the management of index properties and adding more sophisticated tests, demonstrating a strong focus on database internals and performance optimization. The user also addressed data races and implemented several critical fixes within the database's low-level storage structures, suggesting a deep understanding of the underlying database architecture.
data-modelsdatabase-modelextensionsjavascriptquery-language
google/s2geometry
Mar 2022 - Jan 2023
Computational geometry and spatial indexing on the sphere
Role in this project:Back-end Developer
Back-end DeveloperContributions:76 reviews, 10 commits, 18 PRs in 9 months
Contributions summary:Valerii primarily contributed to fixing bugs, improving code maintainability, and addressing potential issues in the `google/s2geometry` repository. They addressed a UBSan error, corrected compiler warnings, and added missing header files. Additionally, the user removed unused variables and fixed address sanitizer issues related to the S2Loop move constructor/assignment. This indicates a focus on code correctness and optimization within the project.
polygonsspatial-indexingspatialgeometric-algorithmsindexing
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