02.01.2026 aktualisiert

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Software Developer | Trainer | Consultant (works with PHP, loves Symfony and RESTful APIs)

Wuppertal, Deutschland
Wuppertal +50 km
Dipl.-Inf.
Wuppertal, Deutschland
Wuppertal +50 km
Dipl.-Inf.

Profilanlagen

Symfony-4-Certificate-jschaedl.pdf
Symfony-5-Certificate-jschaedl.pdf
Twig-1-Certification-jschaedl.pdf
Symfony-6-Certificate-jschaedl.pdf

Skills

Clean CodePHPTest AutomationSoftware QualityCqrsSoftware Design PatternsGitHubLaravelPostgreSQLMySQLSoftware ArchitectureRabbitMQSymfonyTest-Driven DevelopmentPHPUnitGitBehatTwigKubernetesStatic Code AnalysisDomain Driven DevelopmentRestful ApisRefactoringDoctrine (orm)DockerJenkins
Languages and Tools
PHP 5-8, Symfony 1-7, Laravel, Doctrine, Propel, Twig, PHPUnit, Behat, PHPStan, Rector, Deptrac, MySQL, PostgreSQL, MOngoDB, DynamoDB, GraphQL, RabbitMQ, Redis, Git, Jenkins Pipelines, Github Actions, Docker, k8s, AWS

Principles
RESTful APIs, Test-driven Development, Automated Testing, Clean Code, Code Quality, SOLID, DDD, CQRS, Design Patterns

Legacy
Legacy migrations, PHP & Symfony upgrades, framework migrations, automated testing and refactoring

Workshops
RESTful APIs, Unit & Integration Testing, Test-driven Development, Symfony and its Components

Erfahrung

Berufserfahrungmehr als 10 Jahre
Freelancer seit2008

Sprachen

DeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Senior Software Developer (Freelancer)

Scayle GmbH

Konsumgüter und Handel

250-500 Mitarbeiter

Senior Software Developer (Freelancer)

The Quality Group GmbH, Hamburg, Germany

Konsumgüter und Handel

250-500 Mitarbeiter

Built an address validation and correction service (Bref, PHP 8.2 and Symfony 6) used in a microservice event- driven architecture running on AWS. Refactored several PHP projects towards a uniform way of using Symfony and Bref and other components and tools, like Symfony Serializer, Doctrine, PHPUnit, etc.

Trainer (Freelancer)

Digital Building Industries AG, Böblingen, German
Provided a 1-day in-house Training: “Symfony’s Dependency Injection Component & The Service Container”.

Senior Software Developer (Freelancer)

movingimage EVP GmbH, Berlin, Germany

Internet und Informationstechnologie

50-250 Mitarbeiter

Helped with hands-on programming to ensure that several tight scheduled feature implementations in a Symfony 5 application using a MongoDB data storage hosted on Azure can be delivered on time. Upgraded a legacy Symfony 3 API application to Symfony 6.

Trainer (Freelancer)

New Elements GmbH, Nürnberg, Germany
Provided a 2-days in-house Training “Symfony für Fortgeschrittene” (including the following topics: Dependency Injection & Symfony’s Service Container, Event Dispatcher & Symfony’s Event Flow, Console Commands, Symfony Security, Doctrine ORM) for the client’s customer public plan GmbH in Düsseldorf.

Lead Software Developer

eos.uptrade GmbH

50-250 Mitarbeiter

Leading a team of PHP/Symfony developers. Giving technical guidance by doing pair-programming, peer reviews and personal feedback meetings. Being responsible for defining and implementing measures to increase test coverage and code quality. Having the role of a technical domain expert for the SSO (OAuth2, OIDC, PKCE) and payment domains (integration of Logpay, PayUnity, MobilePay, ApplePay, GooglePay, etc.). Being the hiring manager and on-boarding new developers for the German and Portuguese offices.

PHP Team Lead

Siemens Mobility Portugal
Led a Team of PHP/Symfony developers migrating a Symfony 1 legacy applications towards a modern architecture based on Symfony 5. Hired and onboarded new developers. Provided workshops related to PHP, Symfony, Unit-/Integration-Testing and API development. Shared knowledge by pair-programming sessions and peer reviews. Organised the Symfony User Group Aveiro, Portugal.

Senior Software Developer & Trainer

SensioLabs Deutschland GmbH

Sonstiges

10-50 Mitarbeiter

Helped clients with upgrading Symfony applications and migrating legacy applications towards a modern architecture based on Symfony. Provided Symfony trainings, code audits and individual workshops. Organised the Symfony User Group Hamburg. Contributed to open source projects, like Symfony, Symfony-Docs and Deptrac.

Senior Software Developer (Freelancer)

miovent AG

Sonstiges

50-250 Mitarbeiter

Solved doctrine performance issues in a Symfony 3 application.

Senior Software Developer (Freelancer)

Thiocyn GmbH

Sonstiges

10-50 Mitarbeiter

Built deployment processes for a Shopware based online shop application and created individual Shopware plugins.

Senior Software Developer (Freelancer)

Lykon GmbH

Sonstiges

50-250 Mitarbeiter

Created a RESTful API for a mobile and a web shop application using Symfony, Doctrine and RabbitMQ.

Software Developer

University of Applied Sciences, Osnabrück, Germany

Developed web, desktop and mobile applications, set up a distributed monitoring system based on Nagios and developed IT concepts.

Zertifikate

Certified Symfony 6 Developer

Symfony SAS

2022

Twig Certified Designer

Symfony SAS

2021

Certified Symfony 5 Developer

Symfony SAS

2020

Certified Symfony 4 Developer

Symfony SAS

2019

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