Basic

Kelvin Williams

Freiberuflich, Freelance React Native Developer, Active Giving

Berlin, Deutschland

Skills

Swift
Objective-C
JavaScript
ES6
HTML5
CSS
Java
C/C++
Python
SQL
iOS Development
Android Development
Node.js
React Native
Bash
Linux
Nginx
Docker
Object Oriented Programming
Programming
Software Development
Software Engineering
Mobile

Timeline

Professional experience for Kelvin Williams

  • Current 1 year and 7 months, since Dec 2019

    Freelance React Native Developer

    Active Giving

    • Greenfield project in which I acted as the app architect and senior developer overseeing the technical aspects of the project and assisting the other developer on the project when needed • Implemented key features and components such as GPS tracking, API calls and state management • Set up distribution in both app stores.

  • 7 months, Sep 2019 - Mar 2020

    Freelance React Native Developer

    Rohpost

    • Took over existing app, as a one-man dev team, and fixed various UI, UX and performance issues. • Implemented and fixed key features such as profile deletion (along with all associated data in firebase), a caching strategy to decrease firebase bandwidth usage and improve perceived performance, and an improved, more security-conscious friend invite process. • Introduced TypeScript; cleaned up large parts of code base. • Supported project until a successful relaunch in the app stores.

  • 7 months, Jul 2019 - Jan 2020

    Freelance Mobile Developer

    kollex GmbH

    • Took over app from agency to continue development of key features, such as filtering products and analytics tracking. • Acted as a one-man mobile app development team responsible for implementing new features, fixing bugs store releases • Debugged and fixed performance issues impacting creation of shopping lists and ordering in collaboration with the product and backend team. • Successfully on-boarded new developer and did handover and knowledge transfer of the code base before leaving.

  • 6 months, Aug 2018 - Jan 2019

    Freelance Mobile Developer

    LykonDX GmbH

    • Started development of cross-platform Lykon companion app from scratch in close collaboration with designers and product development team in a mobile team of two as mobile lead. • Designed app and project architecture for efficient and scalable development. • Implemented key features regarding tracking habits to improve blood biomarkers. • Published app in App Store and Google Play Store. • Delivered documentation and for knowledge transfer to remaining developers.

  • 2 years and 3 months, Jun 2016 - Aug 2018

    Mobile (iOS, React Native) and Backend Developer

    softgarden e-recruiting gmbh

    • Lead efforts to port the softgarden app to Android and Windows with React Native • Developed and successfully published the softgarden iOS app in a team of 3. • Took over and finished Coffi app project from previous team and successfully published to App Store

  • 1 year and 2 months, Dec 2012 - Jan 2014

    Working Student

    Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut

    Implemented automated fiber to fiber alignment algorithms for passive waveguide structures in LabView.

  • 5 months, Aug 2012 - Dec 2012

    Student Intern

    Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut

    Measuring power, voltage and frequency characteristics of high-frequency fiber-optic-chips.

Educational background for Kelvin Williams

  • 2 years and 2 months, Apr 2014 - May 2016

    Computer Engineering

    TU Berlin

    Communication Networks

  • 4 years and 11 months, Sep 2008 - Jul 2013

    Electrical Engineering

    TU Berlin

    Telecommunications Engineering and Radio Frequency Engineering

Languages

  • German

    First language

  • English

    First language

  • Spanish

    Fluent

  • Portuguese

    Intermediate

  • French

    Basic

Wants

Mobile Development
iOS Development
React Native
Computer Science
Programming
JavaScript
Backend Development

Interests

Computer Science
Music
Sport
Football

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