Katerina Bletsch
Product Engineer at Wallet Platform (2–3k tx/day)
Limassol, Cyprus
Summary
🤩
Rockstar🎓
Top SchoolKaterina Bletsch is a Product Engineer and senior platform specialist with 10+ years building resilient, high-throughput payment and blockchain infrastructure. She has driven end-to-end crypto wallet delivery at scale—launching multi-chain payments handling 2.5k+ tx/day—and led compliance integrations (Travel Rule, KYT) that bridged engineering, operations, and regulatory teams. Her background spans telecom and payment gateways where she engineered systems supporting millions of users and optimized incident response and developer workflows, and at Huawei she helped automate refactoring to mitigate a company-wide security incident. An active backend contributor to FerretDB, she implemented MongoDB-compatible update operators and improved core projection logic, reflecting a pragmatic focus on correctness and interoperability. Based in Limassol, Cyprus, she pairs deep Golang and systems experience with product ownership to reduce operational risk and accelerate time-to-market.
10 years of coding experience
8 years of employment as a software developer
Business Administration and Management General, Business Administration and Management General at University of California, BerkeleyMaster of Computer Applications - MCA Computer Science, Master of Computer Applications - MCA Computer Science at Tomsk Polytechnic University
English, Greek, Russian, German
Github Skills (12)
databases10
pdf-document10
go10
database-administration10
admin10
mongodb10
documents10
mongodb-database10
database10
postgresql9
golang9
testing8
Programming languages (9)
Github contributions (5)
FerretDB/FerretDB
Mar 2022 - Jul 2022
A truly Open Source MongoDB alternative
Role in this project:
Back-end Developer
Back-end DeveloperContributions:941 reviews, 30 commits, 57 PRs in 4 months
Contributions summary:Katerina primarily contributed to the FerretDB project by fixing projections and related error messages. They implemented support for the `$elemMatch`, `$set`, `$setOnInsert`, and `$unset` update operators, enhancing the project's compatibility with MongoDB features. The user also added tests for the `RemoveByPath` functionality and refactored existing tests. These changes involved modifying core logic related to data handling and validation.
golangmongomongodb-databasenodejsdatabase
seeforschauer/FerretDB
Jul 2022 - Nov 2022
A truly Open Source MongoDB alternative
Contributions:157 pushes, 15 branches in 4 months
mongomongodb-databasenodejsmongodb
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