Kostas Pagratis
Sr Software Engineer Distributed Systems at Workday
Longmont, Colorado, United States
Summary
👤
Senior🎓
Top SchoolKostas Pagratis is a senior distributed systems engineer with 11 years of experience building reliable backend services, currently focused on large-scale systems at Workday after an eight-year tenure at Twitter. He specializes in Scala and Java and has a strong track record improving testing infrastructure, database integrations, and lifecycle reliability for high-throughput RPC and service frameworks such as Finagle and Finatra. Kostas’ open-source contributions include robust fixes and tooling for embedded MySQL testing and resource cleanup hooks that reduced test flakiness in widely used Twitter projects. Based in Longmont, Colorado, he brings a pragmatic engineering approach grounded in a BS in Computer Science from the University of Colorado at Boulder. His background shows a knack for quietly improving developer experience and test reliability in critical distributed systems.
10 years of coding experience
8 years of employment as a software developer
University of Colorado at Boulder
English, Greek
Stackoverflow
31reputation
290reached
0answers
4questions
Github Skills (24)
mysql10
testing10
finagle10
guice10
java10
scala10
javas10
test-automation10
web-framework9
application-framework9
microservices-application9
distributed-systems9
database-administration9
app-framework9
microservices9
Programming languages (7)
Github contributions (5)
twitter/finagle
Feb 2021 - Aug 2022
A fault tolerant, protocol-agnostic RPC system
Role in this project:
Back-end Developer / DevOps Engineer
Back-end Developer / DevOps EngineerContributions:10 commits in 1 year 5 months
Contributions summary:Kostas primarily contributed to the testing infrastructure and internal tooling for the `finagle-mysql` module within the Finagle RPC system. Their work involved creating embedded MySQL instances for integration tests, including the setup and teardown of these instances. They also addressed issues with base directory configurations and socket file handling, which improved the reliability and robustness of the testing harness. Further contributions included improvements to the database caching mechanism, addressing a bug related to the failure accrual behavior, and increasing the test timeout.
fault-tolerantrpcredismysqlfinagle
twitter/finatra
Nov 2021 - Sep 2022
Fast, testable, Scala services built on TwitterServer and Finagle
Role in this project:Backend Developer
Backend DeveloperContributions:8 commits in 10 months
Contributions summary:Kostas contributed significantly to the `finatra` repository, focusing on improving testing infrastructure and database interactions. They implemented a `runAfterAll` hook in `IntegrationTestMixin` to simplify resource cleanup in tests. Further contributions involved enhancements to the `mysql-client` module, including the ability to override client creation and fixing a root client leak to prevent errors in test suites, and improved the `EmbeddedMysqlServer`. They also made adjustments to the testing lifecycle and refactored test classes.
guicetwitter-serverfinagletestingframework
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.