Tin Tvrtković
Staff Engineer at Hi Auto
Zagreb, Croatia
Summary
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Rockstar🎓
Top SchoolTin Tvrtković is a Staff Engineer based in Zagreb with 13 years of experience building robust backend systems, leading teams, and improving developer tooling. He blends hands-on engineering and leadership—recently progressing from Team Lead to Staff Engineer at Hi Auto—while maintaining long-term engineering roles and consultancy through Vintervila. An active open-source contributor, Tin has improved testing and async tooling in prominent Python projects such as pytest-asyncio, mypy, attrs and aiofiles, often focusing on test coverage, compatibility backports and CI/CD automation. His background spans gaming backends and large-scale service operations (Nanobit, Pocket Worlds), giving him strong production and scaling instincts. Notably, he pairs practical infrastructure work (SSL, downloads, sendfile) with library-level improvements that make async and typed Python codebases more reliable and maintainable.
13 years of coding experience
8 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at FER
Stackoverflow
646reputation
12kreached
15answers
0questions
Github Skills (39)
static-typing10
pytest10
python10
testing10
mypy10
dynamic-typing10
implicit-typing10
network-programming10
plugin10
attr10
asyncio10
typechecker10
typehinting10
optional-typing10
attribute10
Programming languages (18)
Github contributions (5)
python-attrs/cattrs
Aug 2016 - Jan 2023
Composable custom class converters for attrs, dataclasses and friends.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 releases, 50 reviews, 517 commits in 6 years 5 months
Contributions summary:Tin primarily contributed to the project by fixing documentation issues and adding various code modifications, including those related to backports for older Python versions. These changes suggest work on ensuring the project's compatibility with older Python environments and enhancing documentation, which may enhance the project's stability and usability. The user also made changes to dependencies such as typing and the underlying code.
convertersdeserializationserializationattrsconverter
pytest-dev/pytest-asyncio
Apr 2015 - Oct 2021
Asyncio support for pytest
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:31 reviews, 117 commits, 55 PRs in 6 years 7 months
Contributions summary:Tin primarily contributed to the development of testing infrastructure for the `pytest-asyncio` library. Their commits focused on adding tests for fixtures, markers, and the core functionality of the library, including asynchronous testing with coroutines. They updated the documentation, improved test coverage, and added new features such as the unused TCP port factory fixture. These changes directly enhanced the library's capabilities and usability for testing asyncio code.
pythonasynciopython3pytestsanic
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