Lukas Liesis, RESTful APIs Developer in Kaunas, Kaunas County, Lithuania
Lukas Liesis

RESTful APIs Developer in Kaunas, Kaunas County, Lithuania

Member since August 6, 2015
Lukas is a skilled developer with 10+ years experience on projects with up to 15 million users. He's passionate about React.js, React Native, MongoDB, web sockets, and Material Design. He has experience with DynamoDB, SQL, MongoDB, and RESTful and socket-based APIs. He's used and created custom APIs, and he can build software from the ground up.
Lukas is now available for hire



  • RESTful Development 15 years
  • RESTful APIs 15 years
  • JavaScript 15 years
  • Node.js 8 years
  • React 8 years
  • Google Material Design 7 years
  • WebSockets 7 years
  • MongoDB 6 years


Kaunas, Kaunas County, Lithuania



Preferred Environment

React, Node.js, GitHub

The most amazing...

...thing I've built was in cooperation with ex-Googlers and scientists from NASA; it was a part of a core for services used by 15+ million users globally.


  • Software Engineer

    2016 - 2016
    Wristband E-shop
    • Developed a single-page site to choose, order, and follow orders. Integrated with payment APIs.
    Technologies: Material-UI, Firebase, React
  • React Developer

    2015 - 2016
    • Took on a full-stack challenge to minimize this site's technology stack down to one programming language (JavaScript). JS is used all the way through, from server to client and database and even for most CSS. I also used material-design specifications to create an easy-to-use UI. With React.js, I was so much more productive than with PHP's MVC style frameworks. It was a pleasure to move out of PHP world.
    • Completed the project solo in three months.
    • Built a native Android app with React.
    Technologies: WebSockets, RESTful Development, RESTful APIs, Git, PayPal API, MongoDB, Nginx, Material Design, Node.js, React Native, React
  • Android Developer (React Native)

    2015 - 2015
    LHM Group
    • Built a React Native app for Android where you can preview a house project and order from LHM. The challenge was to build a React Native app for Android while it was released only for 1-2 weeks for public usage outside of Facebook.
    Technologies: React Native
  • Software Engineer

    2012 - 2015
    Hostinger International
    • Hired as 5th engineer at Hostinger to help develop the Hostinger and Youhosting network (15,000,000+ users) with Zend Framework and Doctrine. Developed on the full-stack, including back-end and front-end.
    • Developed internal software for users, staff members, and invoice management.
    • Redid and optimized the main home page.
    • Created an invoice management system for internal usage from the ground up. Added a lot of new futures for Hostinger's network management system.
    Technologies: RESTful Development, RESTful APIs, Zend Framework, PHP, MySQL, JavaScript
  • Developer/SEO Consultant/Freelancer

    2012 - 2013
    • Built's website. It is an official VEGE website to represent the company for clients from Russia, Ukraine, and other Russian speakers.
    Technologies: PHP, SQL, Apache, Joomla
  • SEO Consultant, Freelancer for eCommerce

    2011 - 2013
    Metalo Amžius
    • Improved SEO to increase online sales. Remade the administration panel to make it easier to use. Taught administrators to use the CMS. Made all required updates to content, layout, etc.
    • Used PrestaShop to do the biggest part of the job.
    • Synced the item status with old software that manages item availability.
    Technologies: Virtual Private Servers, Twilio Sync API, PrestaShop



    I always wanted to monitor output of any command. With Trafikito I can. You can monitor the output of any command and execute an API call when stuff happens.

    Command output monitoring service deployed on high-quality global AWS Infrastructure—three edges, global DB tables, and load-balancing.


    A tool for teachers to create offline tests, done with PhalconPHP, Twitter Bootstrap, and MySQL. I organized five teaching sessions on how to use this tool. It was a very interesting experience, and I got in touch with users to find out many UX little things that matter for users, making changes to the software in response.


    A fully automatic website with pre-made content. This system has tens of thousands of templates ready to publish. The system grabs a template archive, analyzes it, makes some changes, and publishes. It has search by hue.

  • is a hosting solution. Here, you can register a free account and get hosting for your website. Check out all the great features on the page.

  • News-Flow

    What was challenging in this project is the amount of data. I developed the crawler, which collected news from around the net and published them on a news-flow site. Used a SQL database.

  • is an educational project to help people in Lithuania learn about IT. There are several connected sites with articles about coding, design, and a forum for help and support. Done with Joomla, SMF forum, and some custom components for those systems.

  • AutoMouser

    Built with the C family. I needed an auto mouse clicker and didn't found exactly what I was looking for, so I learned some .NET code and made it myself. It was my second app with .NET framework and C family languages. It was interesting to move out of my comfort zone of web development and try building something for Windows OS. AutoMouser is quite a popular tool now with ~1500 weekly downloads.

  • Gerda Photography

    Together with my wife, we are organizing professional photo-shoots. We shoot private sessions or big events.

    We are devoted to feelings, emotions, and real life. People love our photographs because of the cosiness, lighting, and authentic decorations. Our photography is 70% psychology, 20% design, and 10% technique.

  • React Examples Repository

    A GitHub repository where I create example apps with React. By teaching, we learn.

  • IT Certifications

    Completed (2003-2007) via IT Academy "Strauja."


  • Languages

    JavaScript, CSS, HTML, SQL, PHP
  • Frameworks

    Material-UI, Flux, React Native, Zend Framework
  • Libraries/APIs

    Node.js, jQuery, React, PayPal API, Twilio Sync API
  • Paradigms

    RESTful Development, Unit Testing
  • Platforms

    MacOS, Joomla, Firebase
  • Other

    Google Material Design, RESTful APIs, WebSockets, Freelance, ESLint, Ubuntu Server, Usability, SVG, Material Design, Virtual Private Servers
  • Tools

    Adobe Photoshop, Adobe Lightroom, Nginx, Git, GitHub, Apache, PrestaShop, Adobe Illustrator
  • Storage

    AWS DynamoDB, MongoDB, MySQL


  • Master's Degree in Physics (Environmental Management)
    2012 - 2014
    Vytautas Magnus University - Lithuania
  • Secondary B.S. Studies Degree in Business and Applied Informatics
    2010 - 2012
    Vytautas Magnus University - Lithuania
  • Bachelor of Science (B.S.) Degree in Physics (Energetic)
    2008 - 2012
    Vytautas Magnus University - Lithuania

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