Lead Software Engineer, Coach and Trainer

6/2021 – 11/2021

CLIENT
The IT company that helped to bring the first people onto the moon

SKILLS
React, JavaScript, Spring Boot, Java, CORS, PostgreSQL, MongoDB, Shell Script, Nginx, Docker, Kubernetes, IBM Cloud, OpenShift, CI/CD, Tekton, GitOps, ArgoCD, Jest, First-principles

ACHIEVEMENTS & RESPONSIBILITIES
- Delivered 7 bootcamps to 150 enterprise developers covering eXtreme Programming and DevOps practices
- Helped students learn to create CI/CD pipelines using First Principles, OpenShift, K8s, Docker, and Tekton to ship 12-factor applications of various tech stacks and databases

Continuous Delivery (CDE), Kontinuierliche Integration (CI), Testautomatisierung, Docker, Kubernetes, JavaScript, PostgreSQL, React (JavaScript library), Spring

1/2019 – offen

CLIENT
Software house & corporate it training provider

SKILLS
React, Redux, Bootstrap, JavaScript, TypeScript, i18n, a11y, Next.js, REST, GraphQL, Node, Serverless, Express, FeathersJS, Swagger, MongoDB, SQL, Redis, TDD, Jest, Cypress, Testing Library, Storybook, CI/CD, GitOps, Docker, Kubernetes, AWS, GCP, CloudFormation, GitHub, Jenkins, Scrum, Kanban, XP, …

ACHIEVEMENTS & RESPONSIBILITIES
- Supported software projects as Principal Software Engineer, Product Owner, and Coach at Tesla, American Airlines, IBM, Mercedes, Porsche, BP, ImmoScout24, Kaiser+Kraft, .planetly, .remind.me, Helmholtz-Zentrum, GetYourGuide, Marley Spoon, Automedia, Treatmind, Kabs, and more
- Designed, produced, and delivered online courses and live workshops (on Test-first Programming, how-to TDD React apps, how-to TDD Microservices, eXtreme Programming, and DORA metrics & capabilities) with about 500 students and an average score of 4.8 on a scale from 0-5.
- Designed and conducted 3-month full-stack bootcamps and provided on-the-job mentoring to the staff at the companies above
- Accelerated the Software Delivery Performance at the companies above by introducing DevOps and Software Engineering Best Practices (with DORA Metrics, Trunk-based Development, Emergent Design, SOLID & Clean Code Principles, Rule of 3, Vertical User Stories, WiP-Limits, Pull System, GitOps, CI/CD, Testing Principles, Test Automation, Pair Programming, Live Peer Reviews, Test-first Programming, and many more)
- Turned 6 people without any pre-existing IT know-how into professional software engineers who now lead development efforts at our client’s teams as role models in terms of hard and soft engineering capabilities
- Developed and released an OpenSource Testing Library that is currently used at companies like American Airlines and Treatmind

DevOps, Kontinuierliche Integration (CI), Testautomatisierung, Testdesign (IT), Docker, Kubernetes, GraphQL, JavaScript, Node.js, React (JavaScript library), Testing (IT), TypeScript

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

Testautomatisierung, TypeScript, JavaScript, Node.js, 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

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

Amazon Web Services (AWS), Docker, Java (allg.), Kanban (Softwareentwicklung), Spring, Testautomatisierung

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

DevOps, Kanban (Softwareentwicklung), SCRUM, Testautomatisierung, Java (allg.), JUnit, Kontinuierliche Integration (CI), 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

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

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

Kanban (Softwareentwicklung), SCRUM, Testautomatisierung, Java (allg.), Kontinuierliche Integration (CI), 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

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

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

.Net, C#, C++, SQL

6/2000 – 12/2007

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