Hi, I am

a senior iOS developer

an interim tech lead

an interim CTO

René Kann

I am a software engineer with many years of experience for iOS and web, including knowledge of the "full-stack" of web technologies for frontend and backend services.

As a developer and technical lead I managed various projects for well-known, multinational clients (e.g. Daimler AG, Mercedes-Benz Museum, Autostadt / Porsche AG, ImmobilienScout AG) and lead teams of varying sizes (between 5 to 15 persons). Having worked in a usability agency for many years and being extremely self-motivated with a strong interest for „usable“ products which are balanced with a technical design for a long term use.

What I can help you with:

  • Building a MVP
  • migrate from Objective-C to Swift
  • Refactoring, introducing testability, performance issues
  • Interim Tech Lead / Interim CTO
  • Getting things done (in time)

My Work

 
01/2019 - 05/2019
05/2019
01/2019

Freelance Senior iOS Developer + Consultant

Successyou GmbH

Maintained an app for a large multinational corporation of nonalcoholic beverage concentrates which was used by a large group of sales representatives in Europe. The app was highly reactive, connected to Salesforce backend and used Couchbase lite for local persistence. I migrated the app and related frameworks to Swift 4.2 and gave architectural decisions and recommendations.

  • Salesforce SDK / Salesforce with iOS
  • Used Couchbase lite for local persistence
  • International Team
 
 
10/2018 - 12/2018
12/2018
10/2018

Freelance Senior iOS Developer + Consultant

Free2Move (Groupe PSA)

Working in an English speaking environment I supported with test-driven implementation of a complete new feature for multi provider registration. Did the architectural decisions and recommendations, gave a workshop about introducing testability for the overall project and helped migrating from Objective-C to Swift 4.x

  • Introduced testability and gave workshop about testing
  • International Team
  • Migration from Objective-C to Swift
 
 
01/2018 - 09/2018
09/2018
01/2018

Freelance Senior iOS Developer + Consultant

ImmobilienScout24

Working in an English speaking environment I supported with test-driven implementation of new product functions using Swift / Objective-C and MVVM, MVP in biweekly sprints for the ImmobilienScout24 App. I also consulted in evaluation of new product ideas, feasibility study to connect external service providers.

  • Implemented new feature to generate realtor leads
  • International Team
  • Migration from Objective-C to Swift
 
 
01/2017 - 12/2017
12/2017
01/2017

Freelance Senior iOS Developer + Consultant

BitingBit GmbH

Support in maintaining an iOS app for a leading German multinational automotive company. Implemented new features in weekly sprints, performed code reviews and refactored several parts of the app to reduce technical debt. I also implemented an app (from scratch) for visitors of congresses to manage their favorite lectures, asking questions to the referents and reviewing the whole event agenda. The app uses Google Firebase as backend, the main architecture is built upon MVVM and set its focus upon offline capabilities to deal with bad network coverage.

  • Maintained app for automotive environment
  • Mentoring mobile developers
  • Build swift app for dentist exhibition from scratch
 
 
05/2011 - 12/2016
12/2016
05/2011

CTO + Mobile Lead

UCDplus GmbH

Technical lead and manager of various projects for well-known, multinational clients (e.g. Daimler AG, Mercedes-Benz Museum, Autostadt / Porsche AG). I implemented iOS apps as lead developer as part of a team with varying sizes like the Daimler AG Entertainment app, the Daimler AG Jobs app, an app for the Porsche AG for the new opened Porsche pavilion at the Autostadt Wolfsburg. Besides, I lead the development team and optimized the processes and procedures of the development stack.

 
 
06/2006 - 12/2010
12/2010
06/2006

Founder and CEO

Soraxdesign

We implemented rich internet applications (RIA) with Flash, Flex and web applications for various national clients. Main focus was developing customized content management systems and individual web apps.

 
 
05/2007 - 01/2010
01/2010
05/2007

Freelance Idea Engineering

Zephram GbR

I worked as idea engineer for the Zephram GbR, moderated workshops and developed product ideas.

 
 
06/2006 - 10/2009
10/2009
06/2006

Freelancer for RIA and Web Development

Schroeder + Wendt GbR

Implemented rich internet applications (RIA) with Flash, Flex and Silverlight and web applications for various larger clients. Created a prototype of a possible online video analyzing and editing tool with Silverlight for a presentation at the Cebit 2012 together with Microsoft.

 

Skills

iOS

Objective-C, Swift, Cocoapods, Carthage, Xcode, JSON, Fastlane, Dependency Injection, MVVM, MVP, MVC, Broadcasting Pattern, VIPER, Unit Testing, XCTest, Core Data, Native Apps, Salesforce SDK, Couchbase lite, PromiseKit, Buddybuild, HockeyApp, Tesseract OCR, Git, In-App Purchasing (IAP), WatchKit

Team Lead

TDD, Rapid Application Development, Scrum, Clean Code, Continuous Integration, Continuous Delivery, GitHub, Gitlab, Project lead, Agile Development, JIRA, Confluence

Web Development

Node, NPM, Grunt, REST, AWS, Serverless, ReactJS, JavaScript, MySQL

Languages

German

Native or bilingual proficiency

English

Professional working proficiency

Spanish

Elementary proficiency

Education

08/2005 - 05/2011

Dipl.-Ing. Computational visualistics

Otto-von-Guericke University Magdeburg

Thesis: Acceleration of computerized decision making processes with pairwise comparisons based on sorting algorithms. (grade 1.9) open

Contact

René Kann

Senior iOS Developer | Mobile Lead

vCard

Interested to work together? Let's talk