Ionatan Wiznia
Software Engineer at Expensify
Greater Madrid Metropolitan Area Spain
Summary
🤩
Rockstar🎓
Top SchoolIonatan Wiznia is a seasoned software engineer with 14 years of experience building reliable backend systems and databases, currently based in the Greater Madrid area and working at Expensify. He has deep production experience in distributed systems and databases, evidenced by contributions to Expensify’s Bedrock project where he implemented job dependency handling, schema changes, and resilience features like retries and cancellations. As lead developer at incuentra he architected a lead-generation platform serving over 2000 SMBs, demonstrating an ability to design scalable, customer-facing services. His background includes senior development roles across multiple firms and a Computer Science education from ORT, giving him consistent hands-on expertise from architecture to implementation. Colleagues would describe him as pragmatic and detail-oriented, comfortable touching core database internals as well as application-level logic. He brings a blend of operational awareness and backend craftsmanship that helps teams ship robust systems under real-world failure modes.
14 years of coding experience
3 years of employment as a software developer
Computer Science, Computer Science at ORT
Stackoverflow
1,669reputation
122kreached
49answers
3questions
jquery-ui
top-5%
internationalization
top-5%
Github Skills (18)
c-language10
sqlite10
sql10
database-design10
backend10
cprogramming-language10
indexing9
internationalization9
indexer9
jquery-ui9
ruby-on-rails6
php6
devise6
jquery6
ruby6
Programming languages (6)
Github contributions (5)
Expensify/Bedrock
Oct 2016 - Dec 2022
Rock solid distributed database specializing in active/active automatic failover and WAN replication
Role in this project:
Back-end Developer & Database Engineer/Administrator
Back-end Developer & Database Engineer/AdministratorContributions:39 releases, 178 reviews, 134 commits in 6 years 3 months
Contributions summary:Ionatan's commits primarily focus on enhancing the `bedrock` distributed database, specifically introducing the `parentJobID` feature to manage job dependencies. They added database indexes and modified the database schema to support the new feature, demonstrating a strong understanding of database design. Furthermore, the user implemented logic within the Jobs plugin to handle job retries, cancellations, and state transitions, indicating contributions to the core backend functionality. These changes involved modifications to the core database interactions and job processing logic.
rockdistributed-databasedatabasefailoverreplication
iwiznia/grunt-php-cs-fixer-branch
Jun 2015 - Jan 2022
Grunt plugin for running PHP Coding Standards Fixer in the modified files of the current branch
Contributions:2 reviews, 2 PRs, 11 pushes in 6 years 8 months
gruntgrunt-pluginfixerphpmodified-files
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