Mark Dacek - Software Engineer at Google

Mark Dacek

Software Engineer at Google

New York, New York, United States

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Summary

👤

Senior

🎓

Top School

Mark Dacek is a software engineer with nine years of experience, currently building systems at Google's New York office after a multi-role engineering career at Capital One. He has hands-on expertise migrating high-throughput services to the cloud, designing REST APIs and running containerized workloads that supported hundreds of transactions per second. His open-source contributions include subtle but important Unicode handling fixes to Apache Commons Lang and reliability-focused test automation for the Bazel build system, reflecting attention to correctness and tooling. With a foundation in data engineering and early research in malware detection and Android security, he blends applied security sensibilities with production software delivery. Mark is skilled at turning complex edge cases into robust, well-tested code and enjoys contributing to widely used open-source projects.

9 years of coding experience

7 years of employment as a software developer

Bachelor's Degree Computer Science, Bachelor's Degree Computer Science at University of Richmond

English

Stackoverflow

Stats

174reputation

8kreached

4answers

6questions

Github Skills (23)

unit-testing10

strings10

testing10

text-manipulation10

build-system10

java10

javas10

apache-commons-lang10

bazel10

unicode10

test-automation10

algorithm9

code-optimization9

algorithms9

optimisation9

Programming languages (4)

JavaStarlarkJupyter NotebookAssembly

Github contributions (5)

bazelbuild/bazel

Aug 2021 - Feb 2022

a fast, scalable, multi-language and extensible build system

Role in this project:

QA Engineer / Test Automation Engineer

Contributions:57 commits, 1 comment in 6 months

Contributions summary:Mark primarily contributes to the quality assurance of Bazel, focusing on writing and maintaining test cases. Their commits introduce and modify integration tests for features like subcommand events, environment-restricted builds, and Java-related components. They have added new tests and enabled existing ones that were previously disabled, demonstrating a focus on ensuring the reliability of the build system.

scalablecorrectbazelmulti-languagebuild-system

apache/commons-lang

Mar 2017 - Aug 2018

Apache Commons Lang

Role in this project:

Back-end Developer

Contributions:23 commits, 6 PRs, 29 comments in 1 year 5 months

Contributions summary:Mark primarily focused on enhancing the `CharSequenceUtils` class within the Apache Commons Lang library. Their contributions involved fixing and improving the `indexOf` and `lastIndexOf` methods to correctly handle supplementary characters. They also added test cases to ensure complete branch coverage and address specific issues, including modifications in `StringUtilsEqualsIndexOfTest`. Furthermore, the user addressed formatting issues within `CharSequenceUtils.java` and contributed to improvements in the broader context of handling Unicode characters within the library.

commonslangapacheapache-commonsapache-commons-lang

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