Christian Flothmann
Software-Entwickler OPEN Software Consulting at OPEN Digitalgruppe
Osnabrück, Lower Saxony, Germany
Summary
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Top expert inSymfony Development EssentialsPHP Development and E-commerce Web Technologies
Christian Flothmann is a seasoned PHP software engineer with 13 years of experience, currently developing at OPEN Software Consulting in Osnabrück. He has deep expertise in the Symfony ecosystem, contributing bug fixes, feature improvements, tests and docs across many core components (Messenger, HttpClient, Security, Cache, Serializer and more), demonstrating strong backend, QA and security sensibilities. His work spans low-level robustness (cross-PHP compatibility, Windows quirks, edge-case parsing) to higher-level integration and internationalization, including notable contributions to widely used projects like Symfony and Twig. He pairs pragmatic engineering with attention to maintainability—refactoring, adding type hints, and improving test coverage are recurring themes. Former roles at SensioLabs Deutschland and QOSSMIC underline his sustained focus on framework-level development and developer tooling. Outside the obvious, he also contributes technical writing and localization, helping make complex features easier to use and understand.
13 years of coding experience
15 years of employment as a software developer
Master of Science - MS Informatik, Master of Science - MS Informatik at Universität Osnabrück
Stackoverflow
5,841reputation
295kreached
165answers
0questions
php
top-5%
twig
top-5%
doctrine-orm
top-5%
symfony
top-1%
Github Skills (126)
url-routing10
psr-610
restructuredtext10
utf10
testing10
windows10
http10
authentication10
templater10
smtps10
refactor10
phpunit10
security10
deserialization10
http-client10
Programming languages (11)
Github contributions (5)
FriendsOfSymfony/FOSRestBundle
Nov 2013 - Jul 2021
This Bundle provides various tools to rapidly develop RESTful API's with Symfony
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 releases, 6 reviews, 582 commits in 7 years 9 months
Contributions summary:Christian's primary contribution involved fixing configuration issues related to XML routing and the implementation of RequestBodyParamConverter, which handles deserialization of request bodies, in the FOSRestBundle. Their work added support for format-related configuration options to the RestYamlCollectionLoader and RestXmlCollectionLoader and included testing these changes. The user removed deprecated and unused code, improving code quality and maintainability.
apibundlephpsymfony-bundleapi-s
symfony/yaml
Jul 2014 - Nov 2022
Loads and dumps YAML files
Role in this project:Back-end Developer
Back-end DeveloperContributions:188 commits, 2 comments in 8 years 5 months
Contributions summary:Christian primarily contributed to the Symfony YAML component, focusing on fixing documentation, resolving variable handling in inlined YAML, fixing issues with empty sequence items, and improving error messages. The user implemented code that properly handled escaping sequences in quoted strings and also addressed an issue involving multiple documents, leading to improved error messages and more robust YAML parsing. The user also worked on parsing PHP constants as mapping keys.
symfony-componentphpyaml-filesdumpssymfony
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