Mark Clements
Director, Infrastructure Engineering at Visa
Bristol, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolMark Clements is a Director of Infrastructure Engineering with 14 years' experience building and scaling cloud-native platforms across fintech and enterprise organisations. He progressed from hands-on DevOps and senior engineering roles to leadership positions at Currencycloud and Visa, focusing on resilient infrastructure and operational excellence. Comfortable both managing teams and writing production-grade code, he has contributed to notable open-source tooling such as PHPCompatibility, where he improved version checks and reduced false positives. Based in Bristol, he blends commercial consulting experience with large-scale delivery, having led platform transformations and proof-of-concept work for cloud adoption. Colleagues describe him as pragmatic and detail-oriented, with a history of mentoring engineers and driving measurable reliability improvements. Outside work he’s applied his organisational skills in volunteer and student-club leadership roles, underscoring a collaborative, people-first approach to engineering.
14 years of coding experience
7 years of employment as a software developer
Bachelor’s Degree Business Information Systems (with Year in Industry), Bachelor’s Degree Business Information Systems (with Year in Industry) at Cardiff University / Prifysgol Caerdydd
Github Skills (9)
php10
backward-compatibility10
php-codesniffer10
testing10
rule9
compatibility9
git8
unit-testing8
version-control8
Programming languages (10)
Github contributions (5)
PHPCompatibility/PHPCompatibility
Mar 2015 - May 2017
PHP Compatibility check for PHP_CodeSniffer
Role in this project:
Back-end Developer
Back-end DeveloperContributions:31 commits, 20 PRs, 193 comments in 2 years 2 months
Contributions summary:Mark primarily contributed to the `phpcompatibility/phpcompatibility` repository by enhancing the PHP compatibility checks implemented in PHP_CodeSniffer. Their work involved refactoring code into base classes for reusability, adding new features for range-based version checks, and implementing checks for deprecated functions and language constructs, such as the `/e` modifier in `preg_replace()`. The user also corrected false positives, improved unit tests, and updated code to align with PHP versions, specifically focusing on PHP 5.5 and higher.
phpcompatibilitycomposercustom-rulesetphp81phpcs
MarkMaldaba/PHPSerializationFixer
Jun 2017 - Feb 2024
Contributions:21 pushes, 1 branch in 6 years 9 months
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