Lars Kleiner - Lead Drupal Developer

Q: Where is Lars based?

Lars is based in Hamburg, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Lars speak?

Lars speaks the following languages: German (Native), English (Native) .

Q: How many years of experience does Lars have?

Lars has at least 26 years of experience. During this time, Lars has worked in at least 16 different roles and for 32 different companies . The average length of individual experience is 1 year and 9 months . Note that Lars may not have shared all experience and actually has more experience.

Q: What is Lars's latest experience?

Lars's most recent position is Lead Drupal Developer at x-tention .

Q: What companies has Lars worked for in recent years?

In recent years, Lars has worked for x-tention and Fresenius Netcare .

Q: Which industries is Lars most experienced in?

Lars is most experienced in industries like Information Technology (IT) , Healthcare , Media, and Entertainment and Publishing . Lars also has some experience in Banking and Finance , Professional Services , and Government and Public Administration .

Q: Which business areas is Lars most experienced in?

Lars is most experienced in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) . Lars also has some experience in Customer Service , Operations , and Business Intelligence .

Q: Which industries has Lars worked in recently?

Lars has recently worked in industries like Healthcare and Information Technology (IT) .

Q: Which business areas has Lars worked in recently?

Lars has recently worked in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Recommended expert

Hamburg, Germany

Experience

Aug 2021 - Present

4 years 7 months

Wels, Austria

Lead Drupal Developer

x-tention

Lead Drupal 10 developer for several greenfield projects in the health sector
Drupal architecture in a cloud environment
Set up and maintain GitLab pipelines and Kustomize scripts for Kubernetes deployments
Development of Docker images
Developed custom Drupal modules for features such as OAuth and FHIR
Drupal frontend theming using Bootstrap 5 and Single Directory Components
Set up and maintain automated Playwright tests

Sep 2020 - Sep 2021

1 year 1 month

Bad Homburg, Germany

Senior Drupal Developer

Fresenius Netcare

Served as Drupal 8 technical lead and developer for FNC's global web portal portfolio in an Azure cloud infrastructure
Maintained and developed Laravel/Vue.js applications
Prepared migration of 20+ Drupal sites to Acquia Site Factory
Set up and managed releases on a Kubernetes cluster
Maintained release pipelines in Bamboo
Set up an automated testing framework using Cypress
Integrated the in-house Active Directory service via LDAP
Developed a social networking area using the Group module, and showcased Deploy, Workspace, Replication, Relaxed Web Services, Multiversion, and JSON:API modules for multisite publishing
Prepared for the Drupal 9 upgrade
Maintained and developed the Particle front-end theme (based on Pattern Lab)

Sep 2018 - Aug 2020

2 years

Hamburg, Germany

Senior Software Engineer

Finanzcheck.de

Maintained Symfony 3, MySQL/MongoDB, and Node applications hosted on AWS, with a Travis CI/Spinnaker deployment pipeline and infrastructure managed by Terraform
Maintained interactions with AWS SNS and SQS messaging services
Developed React components
Migrated systems from AWS OpsWorks stacks to Docker images on AWS EKS Kubernetes
Liaised with freelancers
Prototyped in Go and Python
Led a review of the legacy system architecture and proposed an event-driven microservices upgrade path based on domain-driven design (DDD)

Oct 2017 - Sep 2018

1 year

Oldenburg, Germany

Symfony Developer

Oldenburgische Landesbank AG

Developed an XML web service endpoint for OLB’s intranet applications using Symfony 3.4
Integrated various SOAP and REST clients
Optimized the performance of a Zend Server architecture

Apr 2017 - Sep 2017

6 months

Germany

On-site

Drupal Developer and DevOps Engineer

Gesellschaft für Anlagen- und Reaktorsicherheit gGmbH

Provided Drupal 8 development, DevOps, maintenance, and support for public websites hosted on-premises
Introduced Ansible-based release and provisioning playbooks
Upgraded the monitoring system to Icinga 2
Built cross-browser front ends with Bootstrap 3 and Twig, supported by Gulp build scripts

Feb 2017 - Apr 2017

3 months

London, United Kingdom

Drupal Developer

UCL

Drupal 7 and jQuery development for UCL's range of web sites
Web services client development for several feeds and Funnelback endpoints

Oct 2016 - Dec 2016

3 months

London, United Kingdom

Drupal Developer

Cancer Research UK

Drupal 7 and Symfony 2 development for the online fundraising platform based on a Symfony 2 microservices architecture connected to a Drupal 7 frontend

Jan 2016 - Oct 2016

10 months

Senior Drupal Developer

PwC UK

Drupal 7 platform development for UK public service clients
Development of a deployment infrastructure using Drupal Features, drush, Jenkins, bash script, VirtualBox, Vagrant and Docker
Maintenance of the Behat test framework

Sep 2015 - Dec 2015

4 months

Chichester, United Kingdom

Drupal Developer

Unipro Ltd

Drupal 7 development for a high street retail client
Development of a global e-commerce site based on the Drupal Commerce suite

Apr 2015 - Aug 2015

5 months

Germany

Senior Drupal Developer

Condé Nast Verlag

Drupal 7 development for the German edition of Wired Magazine
Identification of areas for improvement post-launch and coordination with stakeholders
Code review according to Drupal best practice guidelines
Performance optimisation and support of junior team members

Mar 2015 - Apr 2015

2 months

Chichester, United Kingdom

Drupal Developer

Unipro Ltd

Drupal 7 development for a pharmaceutical client
Development of custom plugins for the Drupal Panels module
Implementation of a custom product entity using the Drupal 7 Entity API

Jul 2014 - Dec 2014

6 months

London, United Kingdom

Drupal Developer

10 Minutes With

Drupal 7 development for a social network startup for university students
Migration of parts of site functionality to Node.js for performance
Heavy caching of dynamic pages using Varnish Edge Side Includes (ESI)
Development of the new Questions & Answers section

Jan 2014 - Jul 2014

7 months

London, United Kingdom

Drupal Developer

BMJ

Drupal 7 relaunch project for the British Medical Journal
Audit and fix of migrated code from Drupal 6 to Drupal 7
Coordination of migration and development tasks with HighWire Press
Re-addition of lost features and maintenance of the Behat test framework

Jun 2013 - Nov 2013

6 months

Germany

Senior Drupal Developer

Burda Intermedia Publishing GmbH

Technical lead for web relaunch of BUNTE.de on Drupal 7
Implementation of Edge Side Includes (ESI) caching on Varnish
Development of a sophisticated Maestro workflow backend

Jun 2012 - Apr 2013

11 months

Geneva, Switzerland

Drupal Consultant

United Nations Office for the Coordination of Humanitarian Affairs

Development of 'Common Request Format' (CRF) tracking and reporting tool as part of Humanitarian Response site
Quick deployment using Drupal 7 technologies such as install profiles, drush make, Features Server and Localization Server
Modeling of administration workflows using the Workbench suite

Dec 2011 - Jun 2012

7 months

Büdelsdorf, Germany

Drupal Developer

mobilcom Debitel Group

Drupal 7 relaunch of an internal B2B platform
Development of web services integration and data migration scripts
Implementation of a group-based content access model using EntityFieldQuery, Relation module and custom taxonomy access control

Nov 2011 - Feb 2012

4 months

Walldorf, Germany

Drupal Developer

SAP

Drupal 7 relaunch of an ABAP/BSP intranet site
Data and taxonomy integration and migration via SOAP web services
Apache Solr search integration and LDAP single sign on

Jun 2011 - Sep 2011

4 months

Senior Drupal Developer

VelocIT

Drupal 7 project to relaunch AAT's web site
Integration of legacy systems via web services
Hosting on Acquia Network's Cloud service

Mar 2011 - May 2011

3 months

Drupal Developer

luuux.com

Drupal 5 development and site maintenance for a social networking platform
Implementation of userpoints system and Ubercart product management

Dec 2010 - Feb 2011

3 months

Drupal Developer

British Film Institute

Drupal 7 project to relaunch BFI's web site
Integration of offline assets via web services, feeds and custom stream wrappers
Use of Search API with Apache Solr backend, Entity API and file stream wrappers

Apr 2010 - Sep 2010

6 months

Drupal Consultant

Everlution Software

Technical lead for relaunch of everywoman.com
Development of social networking area based on Organic Groups
Faceted search using Apache Solr module
E-commerce element based on Ubercart
Liaison with client and recruitment of Drupal contractors

Mar 2010 - Sep 2010

7 months

London, United Kingdom

Interim Head of Drupal Development

Taglab

Oversaw migration to a Drupal-friendly in-house infrastructure
Architecture, development and maintenance of client web sites

Jun 2009 - Feb 2010

9 months

Tech Lead

Digital People Online

Architecture, development and maintenance of custom document management solutions on Drupal CMS
Integration of Drupal Faceted Search module with Google Search Appliance
Contribution of code back to the Drupal community

Dec 2008 - Apr 2009

5 months

Drupal Developer

IPC Media

Technical lead for relaunch of InStyle site on Drupal 6
Implementation using Panels 2, Views 2 and CCK
Functional dbscripts-inspired deployment solution between servers

Apr 2008 - Oct 2008

7 months

Senior Drupal Developer

Capita

Site architecture setup and leadership of a small development team for National Strategies portal
Development of social networking aspects and extension of Drupal modules including Organic Groups
Use of PHP, jQuery, MySQL, Linux, SVN, Apache Lucene and Apache

May 2007 - Apr 2008

1 year

London, United Kingdom

Drupal Developer

Teachers TV

Backend development of new functionality including a major social networking application
Technologies used: PHP, jQuery, MySQL, Linux, SVN, Apache

Feb 2007 - Apr 2007

3 months

PHP Developer

IPC Media

Object-oriented PHP5 development using Symfony framework
Application design and XML/XSLT coding

Dec 2006 - Jan 2007

2 months

Senior Web Developer

Arc Worldwide

Backend setup for a climate change microsite using Drupal 4.7 on Windows 2003 server
Development of AJAX-driven user interfaces

Aug 2005 - Dec 2006

1 year 5 months

Internal Systems Developer

Information Risk Management

Development of client management system in LAMP
Coordination of migration to C#.NET/SharePoint/MS SQL Server in compliance with OWASP Top Ten
Development of a PDF transformation service using XSLT and XML

Aug 2004 - Jul 2005

1 year

Technical Web Master

Verlag Dashoefer

Coordination of migration from Perl 5/ASP/Adabas/MS Access to PHP4/PostgreSQL
Customisation of PHP-based CMS and transformation of content formats from XML
Systems administration of SuSe, RedHat Linux and Windows servers

Aug 2002 - Jul 2004

2 years

Web Developer (Operations)

Nature Publishing Group

Operations management, application deployment and development of database driven web applications and tools
Extension of a Perl-based CMS transforming XML and SGML into HTML and PDF
Technologies used: Java/JSP/J2EE, HTML, JavaScript, Perl, MS SQL Server, MS Source Safe

Feb 2002 - Jul 2002

6 months

Beaconsfield, United Kingdom

Technical Support Consultant

SealedMedia Ltd

Worldwide technical support for a web based document security application
Development of a support tracking tool in ColdFusion

Mar 2000 - Mar 2002

2 years 1 month

Technical Support Consultant

Pervasive Software

Technical support for Tango web development platform and Pervasive.SQL database product
Database and system administration across multiple platforms
Developer support for Pervasive.SQL VB API
Development of Tango-based intranet sites and a web based tracking tool

Jan 1999 - Feb 2000

1 year 2 months

Dublin, Ireland

Technical Support Agent

IBM Ireland Ltd

Technical support for IBM Global Networks ISP, Aptiva PCs and ThinkPad laptops
High turnover call centre environment with training in IT basics

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (11.5 years), Healthcare (6 years), Media and Entertainment (6 years), Banking and Finance (3 years), Education (2 years), and Professional Services (2 years).

Information Technology

Healthcare

Media and Entertainment

Banking and Finance

Education

Professional Services

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (25.5 years), Product Development (10 years), Quality Assurance (5 years), Customer Service (3.5 years), Operations (2 years), and Business Intelligence (1 year).

Information Technology

Product Development

Quality Assurance

Customer Service

Operations

Business Intelligence

Summary

Drupal and Symfony expert with more than 15 years of web application development experience, including Playwright scripting. Technically led several enterprise Docker projects in both the UK and Germany. Regularly contributes single directory components to the Drupal community ([link]). Proven track record of delivering complex projects on time using best-practice coding standards and Agile methodologies.

Skills

Symfony
Drupal
Php8
React (Javascript)
Twig
Java
Object-oriented Programming (Oop)
Scrum (Agile)
Jira
Git
Behaviour-driven Development (Bdd)
Continuous Integration (Ci)
Varnish
Mysql
Linux

Languages

German

Native

English

Native

Education

Oct 1992 - Jun 1997

Freie Universität Berlin

Diploma · Political Science · Berlin, Germany

Profile

Created

September 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Lars based?

Lars is based in Hamburg, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Lars speak?

Lars speaks the following languages: German (Native), English (Native).

How many years of experience does Lars have?

Lars has at least 26 years of experience. During this time, Lars has worked in at least 16 different roles and for 32 different companies. The average length of individual experience is 1 year and 9 months. Note that Lars may not have shared all experience and actually has more experience.

What roles would Lars be best suited for?

Based on recent experience, Lars would be well-suited for roles such as: Lead Drupal Developer, Senior Drupal Developer, Senior Software Engineer.

What is Lars's latest experience?

Lars's most recent position is Lead Drupal Developer at x-tention.

What companies has Lars worked for in recent years?

In recent years, Lars has worked for x-tention and Fresenius Netcare.

Which industries is Lars most experienced in?

Lars is most experienced in industries like Information Technology (IT), Healthcare, Media, and Entertainment and Publishing. Lars also has some experience in Banking and Finance, Professional Services, and Government and Public Administration.

Which business areas is Lars most experienced in?

Lars is most experienced in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA). Lars also has some experience in Customer Service, Operations, and Business Intelligence.

Which industries has Lars worked in recently?

Lars has recently worked in industries like Healthcare and Information Technology (IT).

Which business areas has Lars worked in recently?

Lars has recently worked in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

What is Lars's education?

Lars attended Freie Universität Berlin for Political Science.

What is the availability of Lars?

Lars is immediately available part-time for suitable projects.

What is the rate of Lars?

Lars's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.