Daniel Karlsson, Software Developer in Stockholm, Sweden
Daniel Karlsson

Software Developer in Stockholm, Sweden

Member since May 17, 2018
Daniel is a full-stack developer and co-founder of a startup called Fliffr. Over the past three years, he designed, architected, implemented, and maintained both back-end and front-end software. As a founder, he's driven and a self-starter, and as an employer of freelancers, he knows what goes into good communication at both ends of a remote working relationship. He prides himself on being able to independently solve problems.
Daniel is now available for hire



  • Python, 10 years
  • Django, 6 years
  • Amazon Web Services (AWS), 5 years
  • Go, 4 years
  • Ionic, 4 years
  • TypeScript, 4 years
  • Angular, 4 years
  • Java, 2 years


Stockholm, Sweden



Preferred Environment

Git, Unix, VSCode

The most amazing...

...thing I've done was found a startup as a technical co-founder. I got to experience the whole product lifecycle.


  • Full-stack Developer

    2019 - PRESENT
    • Architected the back-end and front-end applications.
    • Worked closely and iteratively with clients to deliver products.
    • Improved TDD and CI/CD practices to deliver more stable software.
    Technologies: Spring, Laravel, Angular 7, Ionic 4
  • Founder/Full-stack Developer

    2015 - 2018
    • Developed back-end and front-end from scratch.
    • Managed product and released the application for Android and iOS.
    • Led business development from a technical standpoint.
    • Worked with B2B partners to build customized white label solutions of the Fliffr tech.
    • Led testing work including setting up workflow and CI.
    Technologies: Go, Angular, Ionic, Django, iOS, Android, Cordova
  • Support Technician

    2011 - 2012
    Stockholm County Council, IT Support in Healthcare
    • Learned how to turn any situation, (almost) no matter how bad, into something positive for the customer.
    • Developed scripts to automate helpdesk work such as troubleshooting and applying simple fixes.
    Technologies: Active Directory, Windows


  • Fliffr (Development)

    Fliffr is an application for on-demand help via live video.

    I did front-end and back-end work including integrating WebRTC and Stripe payments and releasing apps for iOS and Android.

  • EagleDial (Development)

    A pivot of Fliffr where we used the same underlying technology to create a new offering for a new segment. This project reinforced my Angular 2 skills as well as quickly delivering a completely new front-end application.


  • Languages

    Java, Python, TypeScript, Go, TypeScript 2, CSS3, HTML5, SQL
  • Frameworks

    Angular, Ionic 2, AngularJS, Django, Ionic
  • Platforms

    Amazon Web Services (AWS), Android, Linux, AWS EC2
  • Libraries/APIs

    WebRTC, Stripe API
  • Tools

    Git, VS Code, Gimp
  • Storage

    AWS RDS, AWS S3, PostgreSQL
  • Paradigms

    Functional Programming, Continuous Integration (CI)
  • Other

    AWS DevOps


  • Coursework toward a Bachelor's degree in Computer Engineering
    2012 - 2015
    KTH Royal Institute of Technology - Stockholm, Sweden

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