Sergey Danilov is a pragmatic technology executive and CEO with 12+ years of hands-on software and leadership experience, now running Keie Group from Nizhny Novgorod. He began as a low-level software designer and evolved through technical leadership, project and product management roles, combining deep C++ and systems expertise with enterprise Java, PL/SQL and DevOps practices. Sergey has led distributed teams, driven large-scale telecom and VoIP projects, and as a contributor to the popular ONLYOFFICE Document Server has fixed core C++ converter components—showing he still codes on critical back-end systems. He holds an M.Sc. and a Ph.D. in Computer Science and is comfortable moving between architecture, delivery and business strategy. An understated strength is his track record of shrinking teams and backlogs while preserving quality, reflecting a focus on efficiency and measurable outcomes.
12 years of coding experience
23 years of employment as a software developer
Ph.D., Computer Science, Ph.D., Computer Science at Nizhniy Novgorod State Technical University named after R.Y. Alekseev (NSTU)
Server core components which are a part of ONLYOFFICE Document Server
Role in this project:
Back-end Developer
Contributions:273 commits, 4 pushes in 6 years 1 month
Contributions summary:Sergey primarily contributed to the core server components of ONLYOFFICE Document Server, specifically focusing on C++ code related to converter and V8 technologies. The commits reveal work on handling spreadsheet and document conversions, particularly involving XlsxConverter, and code adjustments within XlsxConverter. The user implemented fixes to the code within the ASCOfficeOdfFileW and ASCOfficeXlsFile2 components.
JavaScript SDK which is a part of ONLYOFFICE Document Server and ONLYOFFICE Desktop Editors
Contributions:14 commits in 5 months
document-serverjavascriptsdkdesktopeditors
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Sergey Danilov - Chief Executive Officer at Keie Group