Pavel Ryžov
Chief Technology Officer at Velrina
Prague, Prague, Czechia
Summary
👤
Senior🎓
Top SchoolPavel Ryžov is a seasoned technology leader and CTO with over 15 years of hands-on engineering experience and more than a decade in management, currently running an offshore development company from Prague. He builds and coaches high-performing teams, favoring a coaching leadership style that turns skilled engineers into resilient, fast-delivery squads — demonstrated by leading a Sberbank program that processed massive transaction volumes and shortened release cycles to weeks. Technically versatile, Pavel moves between system architecture and core development across Java/Scala, JavaScript/TypeScript and legacy platforms, and contributes to open-source Haskell projects improving API authentication and storage adapters. His background combines deep systems thinking from early telecom and billing work with an MBA-informed focus on delivery and client communication, making him as comfortable negotiating requirements as shipping critical subsystems.
15 years of coding experience
16 years of employment as a software developer
Master's Degree, Mathematical Physics, Master's Degree, Mathematical Physics at Московский Государственный Университет им. М.В. Ломоносова (МГУ)Master of Business Administration - MBA, Business Administration and Management, General, Master of Business Administration - MBA, Business Administration and Management, General at Corporate University of Sberbank
Russian, English, Czech
Github Skills (18)
redis10
aeson10
persistent10
github-api10
rest-api10
haskell10
authentication9
user-authentication9
timespan8
binary-data8
timed8
data-structures8
data-structure8
binary-format8
timeago8
Programming languages (6)
Github contributions (5)
yesodweb/persistent
Feb 2014 - Jun 2016
Persistence interface for Haskell allowing multiple storage methods.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:15 commits, 5 PRs, 4 pushes in 2 years 4 months
Contributions summary:Pavel primarily worked on enhancing the `persistent-redis` library, focusing on compatibility with newer versions of dependencies such as `aeson` and `persistent`. Their contributions involved adapting code to accommodate API changes, fixing test suites, and updating build configurations. The user also made updates to include updated dependencies to resolve constraints with newer GHC versions and Stackage.
haskellpersistencestorage
haskell-github/github
May 2012 - May 2012
The github API for Haskell
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 commits in 9 days
Contributions summary:Pavel primarily focused on enhancing the Haskell-based GitHub API client by adding authentication features. They updated various modules, including those for gists, issues, organizations, pull requests, and users, to support authenticated requests. The user also contributed to the issue reporting sample by adding functionality to calculate issue estimates based on issue labels. Style and documentation improvements were incorporated based on code reviews.
apihaskellservantrest-api
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