Lead Software Engineer, Coach and Trainer

7/2018 – 2/2022

CLIENT
Germany's leading online marketplace for real estate

SKILLS
React, Redux, JavaScript, TypeScript, i18n, a11y, Next.js, REST, Node, Java, Serverless, Express, Spring, Swagger, MySQL, MongoDB, TDD, Jest, Cypress, Codecept, Testing Library, Storybook, CI/CD, DORA, Docker, AWS, CloudFormation, CDK, Jenkins, Graphana, Splunk, XP, Scrum

ACHIEVEMENTS & RESPONSIBILITIES
- Designed and developed React-based input and display elements that were chosen to build the foundation of the most comprehensive rebranding and redesign in my client’s 20-year history – a multi-million EUR initiative affecting 1,500 employees and hundreds of thousands of daily visitors
- Coached 5 teams and led the development of 10 React apps with microservices, including:
- a React app to enable live viewings of apartments in the context of the COVID-19 health crisis • a responsive web dashboard to manage and optimize mortgage payments
- a real estate search and comparison tool for private investment opportunities

Node.js, JavaScript, React (JavaScript library)

3/2016 – 12/2016

CLIENT
America's largest insurance provider

SKILLS
React, Bootstrap, JavaScript, Webpack, HTML, CSS, CSR, REST, Java, Spring Boot, MongoDB, PostgreSQL, TDD, Mocha, Protractor, 12-factors, CI/CD, Pivotal CloudFoundry, Jenkins, Nagios, Git, XP

ACHIEVEMENTS & RESPONSIBILITIES
- Spearheaded the transition from a traditional software engineering approach into an Agile one, utilizing eXtreme Programming and DevOps practices such as TDD, Pair Programming, and Continuous Delivery
- Conducted 3-month full-stack software engineering bootcamps with classes of 30 software engineers
- Embedded with teams to adopt eXtreme Programming and DevOps practices through direct pairing on features using a variety of technologies, including Node, React, Spring Boot, and CloudFoundry

MongoDB, Git, Java (allg.), HTML, JavaScript, React (JavaScript library)

9/2014 – 6/2015

CLIENT
Leading UK-based international daily financial newspaper

SKILLS
Java, Dropwizard, REST, TDD, JUnit, GraphDB, RDF, AWS, CI/CD, Jenkins, Shell Scripting, Docker, Fleet, CoreOS, Varnish, Kafka, Apigee, Scrum

ACHIEVEMENTS & RESPONSIBILITIES
- Developed a semantic metadata platform to infer new insights about businesses and economies
- Guided a team through a transformation from a non-existing process to a Kanban-based approach
- Reduced time for creating and deploying new production-ready microservices from days to under 15 min
- Supported a long-running migration of complex clustered server applications into the Cloud

Java (allg.), Amazon Web Services (AWS)

5/2012 – 11/2013

CLIENT
The world's largest courier company

SKILLS
Java, Groovy, Spring, Grails, REST, SMTP, SOAP, OAuth 2, Hibernate, Liquibase, MySQL, TDD, JUnit, Nagios, CI/CD, Gerrit, Puppet, iOS, Android, Objective-C, ScrumBan

ACHIEVEMENTS & RESPONSIBILITIES
- Developed web and mobile apps and RESTful microservices to receive physical mail on your smartphone
- Coached a team in Kanban and Toyota Katas to reveal and resolve severe bottlenecks in the development and delivery process on a company level, ultimately enabling multiple deployments per day
- Designed and implemented an OAuth 2.0-compliant authentication service for 3rd-party applications

Kontinuierliche Integration (CI), Java (allg.), JUnit, Spring

2/2012 – 12/2018

CLIENT
IT consultancy specializing in agile software engineering and coaching

SKILLS
React, Redux, Bootstrap, Styled Components, JavaScript, i18n, a11y, REST, Node, Java, Serverless, Express, Spring, Swagger, MongoDB, DynamoDB, MySQL, TDD, Jest, Cypress, Codecept, Enzyme, Storybook, CI/CD, DORA, Docker, AWS, CloudFormation, Jenkins, CircleCI, XP, Scrum, Kanban, Swift

ACHIEVEMENTS & RESPONSIBILITIES
- Trained and coached the staff at Allstate, Deutsche Post DHL, 1&1, Cornelsen, HEG, and ImmoScout24 in eXtreme Programming and DevOps practices
- Supported several clients with the development of applications and microservices, including:
- a fitness app where every training video is personalized
- a smart home app to help people with special needs
- a responsive production planning app with interactive Gantt charts
- a SaaS platform for the calculation of tailor-made financial indices
- a service to synchronize in-house subscription products with the Apple App Store and Google Play Store

Java (allg.), Node.js, JavaScript, React (JavaScript library)

1/2011 – 11/2011

CLIENT
Leading internet service provider, offering services worldwide

SKILLS

Java, Spring, JSP, REST, SOAP, TDD, Shell Scripting, Linux, CI/CD, Splunk, Nagios, ScrumBan

ACHIEVEMENTS & RESPONSIBILITIES
- Introduced a customized Agile framework to a team of 8 to perform in the context of several parallel-running waterfall projects and implemented a zero-bug policy after burning down a massive backlog of inherited bugs
- Developed the middleware of an innovative do-it-yourself generator for professional homepages

Kontinuierliche Integration (CI), Java (allg.), Spring

1/2009 – 12/2010

CLIENT
Federal office, providing statistical information to the public of Germany

SKILLS
Java, Spring, AspectJ, Hibernate, Ehcache, REST, Oracle, TDD, JUnit, CookSwing, GWT, Velocity, Maven, Hudson, JBoss, Tomcat, SVN, Scrum

ACHIEVEMENTS & RESPONSIBILITIES
- Guided a team through the migration of complex and long-running software processes to a modern Java Enterprise stack, finally allowing the client to shut down an expensive mainframe computer
- Reduced the runtime of these processes from several days to a couple of hours
- Designed a dynamic RBAC system to allow controlled system access according to the latest legislation

Testing (IT), Apache Maven, Java (allg.), Spring, Representational State Transfer (REST)

7/2006 – 12/2008

CLIENT
The largest computer and video game developer in Germany (at that time)

SKILLS
C#, C++, .Net, SQL, XSD, UML, Maya, MEL, CVS, i18n

ACHIEVEMENTS & RESPONSIBILITIES
- Designed a file format to replace a binary format reducing the data consumption by a factor of 1,000
- Designed and implemented a sound system and the toolchain for a massive role-playing game

SQL, .Net, C#, C++

6/2000 – 12/2007

EARLY YEARS

SKILLS
Java, PHP, HTML, CSS, MySQL, UML, OOP, MVC, Generics, Ceremony Facilitation, Code Reviews

ACHIEVEMENTS & RESPOSIBILITIES
- Led a team of 3 while developing a web app for tracking sports activities for a non-profit association
- Designed and implemented learning tools (e.g., to visualize how the anti-aliasing algorithm works)

CSS (Cascading Style Sheet), HTML, Java (allg.), mySQL, PHP