Senior Mobile Developer / Architect

1/2021 – 6/2021

J. was asked to develop a new application deprecating an old legacy monolith. He took a leading role in architecture design and implementation. This included to break down all requirements into a prioritized backlog, implementing code and making sure the application works as intended after going live.
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Clean architecture, Flutter, NodeJS, Typescript, MongoDB, PostgreSQL, Electron, Postman, Roadmap Planning, Product development, Digital Ocean, Product Backlog, Hexagonal Architecture, Continuous Integration, Continuous Deployment

Flutter, Node.Js

4/2019 – 10/2020

J. was responsible for breaking down the GDPR requirements for cookie consent into a prioritized backlog as well as coordinating the whole implementation process across multiple teams. This role involved reporting product progress as well as facilitating inter project collaboration.

As part of this role, he enabled his team to successfully integrate the IAB framework across the whole [...] organization into the mobile android and iOS applications.
J. was the iOS lead developer for the mobile application, using his prior project experience to set a solid foundation for the project. He was responsible for setting up guidelines as well as best practices for development in the project. Apart from that, he onboarded new colleagues with various backgrounds, conducted candidate interviews to support the recruitment process, supported the team facilitating team retrospectives and further supported shaping product decisions.
By being a Brückenkopf J. had responsibility to manage the work load for the [...] team and work closely with the internal [...] Brückenkopf to prioritize the backlog and plan the team’s sprints. J.’s role was to be the gate of work between [...] and [...].
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Swift, Scrum, Kanban, UI Testing, XCode, AppCode, iOS, Android, Mobile Application, E-commerce, Agile, Test Driven Development (TDD), Pair Programming, Mob programming, API, AWS, CircleCI, Jenkins, Fastlane, CocoaPods, Kibana, Product Development, Product Ownership, Interview, Kotlin, Clean Architecture, MVVM, Bash, YAML, CI/CD, JIRA, Firebase, Crashlytics, Postman, User Stories, User Story Mapping, Product Backlog, Roadmap Planning

Swift (Programmiersprache)

9/2018 – 3/2019

J. was asked to join the [...] project to setup a native iOS application from scratch. The implementation of the app was under high pressure from business side, while a high product and code of quality was expected. J. was setting up an automatic continuous integration / continuous delivery pipeline including automatic unit, integration and UI tests. During the ci/cd conception process, different mobile device management platforms have been evaluated.

During the assignment he not only worked within the iOS scope but also supported the whole work stack and the challenges that arose during the project. He took care of maintaining a high code quality by reviewing PRs and teaching new developers software and swift specific concepts.
He was also introducing an on-boarding process for new team colleagues, introducing coding standards and bringing in an agile and open mindset.
Since J. has been working with different technologies, he also had a role of communicating and aligning between different stakeholders from different teams to ensure delivery of the desired products. He was further responsible for teaching and coaching mobile development knowledge within his team. Next to this, he was also involved into the hiring of new candidates.
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iOS, Microsoft Team Foundation Server (TFS), Fastlane, CocoaPods, AngularJS, Oracle Database, XCode, Swift, REST, Git, Unit Testing, Core Data, Trello, Continuous Integration, JavaScript, Integration testing (XCTest), UI Testing, SourceTree, macOS, XCUITest, Integration Testing, Shell Script, Visual Studio Code, PowerShell, Postman, SQLite, C#, Automation, Bash, Visual Studio, Webstorm, JSON, HTML, SCSS, Agile, Agile Retrospectives, Gulp, Integration and Acceptance Testing

Swift (Programmiersprache)

7/2017 – 8/2018

J. joined different teams at the same client:


J. was part of an interdisciplinary team that was working on the digital transformation of one of the core products, contact lenses. J.'s team was tasked with many cross-cutting concerns, meaning working with both backend and frontend tasks. The backend was thereby responsible for the mobile apps, a web application for the customer and a web application used in the store. This required quickly picking up new techniques and understanding different parts of the system and how they work together.

J.'s team was in charge of developing features to provide sample orders including customer notifications, setting up a training environment for the employees in the stores, deploying features to provide deployment without downtime, creating a mechanism to reply business events to provide reports and implementing different features multilingual. In addition, he worked with several partner integrations such as fulfilment, payment, several SAP systems and point-of-sales terminal. Furthermore, J. setup different Kibana dashboards for monitoring and visualizations of log data.
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C#, Git, AngularJS, TeamCity, MongoDB, Visual Studio, PowerShell, Bash, CSS, HTML, Domain Driven Design (DDD), JSON, Kibana, .NET, Apache Kafka, Webstorm, Trello, Unit Testing, Specflow, Selenium, ReSharper, Paket, JavaScript, Scrum, REST, Docker, NSubstitute, Agile, WireMock, Grafana, Integration and Acceptance Testing, Swagger, Postman, TypeScript, Grunt, Jasmine, SourceTree

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New teams were formed at the customer with the responsibility of providing the customers information about their ongoing or past orders by creating an appropriate micro service landscape. After evaluating possible technologies and architectural patterns, the team decided C# .Net as backend technology and ReactJS as frontend technology. The micro service consumes and communicates via events over Apache Kafka and gets deployed on a Kubernetes cluster. By choosing these cutting-edge technologies the team is creating a service that can be independently scaled with ease.
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C#, AWS, Kubernetes, React, React+Redux, React-router, React-sagas, CSS, HTML, ES6, ESLint, JavaScript, TypeScript, TestCafe, Apache Kafka, Docker, .NET Core, Entity Framework, Identity server, Kibana, vaultier, PostGreSQL, Git, TeamCity, Cake, Rider, Scrum, JSON, Webstorm, Integration and Acceptance Testing, Unit Testing

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J. was part of an interdisciplinary team that was working on the digital transformation of one of the customers core products, contact lenses. Thereby J. joined a new team. The team aimed to provide the functionality of an IT system called [...] regarding contact lenses within Vision KL. Thereby [...] will no longer be required for contact lens processes in the stores. This required quickly understanding different parts of the system and how they work together.
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C#, Git, AngularJS, TeamCity, MongoDB, Visual Studio, power shell, Bash, CSS, HTML, Domain Driven Design (DDD), JSON, Kibana, .NET, Webstorm, Trello, Unit Testing, Specflow, Selenium, ReSharper, Paket, JavaScript, Scrum, REST, NSubstitute, Agile, Grafana, Integration and Acceptance Testing, Swagger, Postman, SourceTree, Jasmine, Less

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J. joined the most strategically important project: Internationalization. Along with other developers and a product owner, their task was to build and prepare the application to be able to handle multiple country specific product portfolios, localization services, logistics as well as country specific features.
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Angular, C#, MongoDB, TeamCity, Docker, Apache Kafka, Git, AngularJS, Visual Studio, PowerShell, Bash, CSS, HTML, Domain Driven Design (DDD), JSON, Kibana, .NET, Webstorm, Trello, rider, Unit Testing, Specflow, Selenium, Testcafe, Paket, JavaScript, ReSharper, Scrum, REST, NSubstitute, Agile, Wiremock, Grafana, Integration and Acceptance Testing, Swagger, Postman, TypeScript, Grunt, Jasmine, SourceTree

AngularJS, C#, React (JavaScript library)

1/2017 – 6/2017

J. was part of the IT team as mobile iOS developer to support them developing the mobile application. He evaluated similar mobile applications to improve and further develop their iOS app. He also trained new team members in iOS development and keeps supporting the web development team introducing API versioning and developing new features.
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SWIFT 3, CocoaPods, HTML5, CSS3, JavaScript, jQuery, Custom Atomic Design, Custom MVVM JS Framework, Custom Grid System, Bootstrap (Administration Cockpit), PHP, ReactJS, Symfony 2, MySQL, Doctrine, Selenium, JUnit, Git, Rest API, Twig, Sass, Vagrant, Ansible, Scrum, Gulp, Trello, Mac OS X, PhpStorm, MySQL Workbench, Jira, Sourcetree, Gitstash, Jenkins, Bitbucket, XCode, Virtualbox

Swift (Programmiersprache)

6/2016 – 12/2016

J. joined the IT team to help them as full-stack developer with focus on frontend development. He supported the team to prepare the web project for different shops by extracting core components. Afterwards he helped planning and realizing the second wine shop [...] (-Hyperlink entfernt-) based on the new architecture of the web project. He also supported the team with the evaluation of different frontend frameworks and finally helped introducing ReactJS as new technology. As a result, features could be developed much faster. The team also wanted to evaluate different ticket systems. J. helped organizing a Jira workshop and supported the IT team introducing Jira.[...] was very satisfied with the result which included more than they had expected.
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HTML5, CSS3, JavaScript, jQuery, Custom Atomic Design, Custom MVVM JS Framework, Custom Grid System, Bootstrap (Administration Cockpit), PHP, ReactJS, Symfony 2, MySQL, Doctrine, Selenium, JUnit, Git, Rest API, Twig, Sass, Vagrant, Ansible, Scrum, Gulp, Trello, Mac OS X, PhpStorm, MySQL Workbench, Flexilio, Jira, Sourcetree, Gitstash, Jenkins, Bitbucket, Virtualbox

React (JavaScript library)