Xander Gottlieb, Full-stack Developer in Luxembourg, Luxembourg
Xander Gottlieb

Full-stack Developer in Luxembourg, Luxembourg

Member since July 24, 2018
With an understanding that spans code, design, and marketing, Xander is in a unique position to innovate, communicate, and deliver the highest quality work. In other words, he keeps the big picture in mind while perfecting the smallest details. In his career, he's designed emails to triple engagement, written robust code in sectors from eCommerce to healthcare, moved startups to the front page of Google, and reached the top 2% of Stack Overflow.
Xander is now available for hire


  • Freelance
    Flutter, React, WordPress, Jekyll, Sketch, JavaScript, jQuery, PHP, HTML5, CSS
  • Think Digitally
    React, WordPress, WooCommerce, SilverStripe, WebGL, PHP, JavaScript, HTML5, CSS
  • Towergate Insurance
    jQuery, Sass, Photoshop, JavaScript, PHP, CSS, HTML5



Luxembourg, Luxembourg



Preferred Environment

Mac, GitHub/Lab, VS Code, Docker, Sketch, Slack

The most amazing...

...project I've built is Grammapp. A cross-platform app that is helping thousands of users learn German grammar.


  • Freelance Designer and Developer

    2012 - PRESENT
    • Invented cross-platform apps with thousands of users with Flutter and Serverless.
    • Worked with Spider PR to design animated ads for household brands such as Typhoo Tea and Tyrell’s Crisps; enliven a host of WordPress sites with bespoke themes and plugins; and develop an end-to-end system for monitoring the national rollout of a startup broadband provider.
    • Designed, developed, and maintained countless websites, many for e-commerce. Platforms include WordPress, React, and other modern web frameworks.
    • Consulted as a designer and marketer for Evora Global, conducting UX and SEO site audits which helped grow their mailing list and reach the front page of Google.
    Technologies: Flutter, React, WordPress, Jekyll, Sketch, JavaScript, jQuery, PHP, HTML5, CSS
  • Head of Web Development

    2015 - 2018
    Think Digitally
    • Was promoted within two years from an intern to the Head of Web Development.
    • Contributed designs and code (including a region-dependent blog, a digital health tracker built with React, and close to a hundred bespoke WordPress plugins/themes).
    • Maintained relationships with customers and strategized for practically every project that crossed the company’s desk.
    • Worked with PHP, WordPress, and eCommerce and became familiar with a host of libraries and APIs including Google Drive, SparkPost, PageSpeed, Facebook, and many more.
    • Worked for clients including CBRE, Ogilvy, and countless small enterprises spanning sectors from the law to broadband to food.
    Technologies: React, WordPress, WooCommerce, SilverStripe, WebGL, PHP, JavaScript, HTML5, CSS
  • Digital Marketing Consultant

    2015 - 2016
    Towergate Insurance
    • Worked in a large, multidisciplinary team of specialists with skills ranging from development to pay-per-click advertising.
    • Rapidly iterated on digital and print advert designs and webpage mockups using Photoshop.
    • Developed a new approach to the company’s online forms—devising an intuitive user interface and custom validation logic to reduce abandonment.
    • Wrote automation scripts for auditing and web scraping to greatly increase efficiency in keyword mining for the company's SEO team.
    • Built a lean 30-page website; taking it from mockups to vanilla HTML, CSS, and JavaScript, in under a week.
    Technologies: jQuery, Sass, Photoshop, JavaScript, PHP, CSS, HTML5


  • Grammapp | Learn German Grammar (Development)

    I designed and developed this cross-platform Flutter app that teaches German grammar to thousands of users.

  • CBRE About Real Estate Blog (Development)

    I developed a blog for one of the world's largest real estate services and investment firms. I also enhanced with a whole suite of custom plugins, including one to allow the site to serve different, granular content to each country and region automatically.

  • Pine | UX and Natural Language Processing (Development)

    Treebanks contain a vast number of sentences, each annotated to describe their grammar structure. These annotations—or trees—are often vital for parsing, translating, and otherwise processing language. However, creating and maintaining treebanks is difficult and time-consuming.

    Enter Pine: a purpose-built and open-source treebank editor that puts usability and speed at its core. It was built with React and Firebase.

  • Interactive Popcorn Simulation (Other amazing things)

    I created a physics simulation that's easier to experience than to describe. I also wrote an accompanying tutorial for Matter.js with over 13,000 readers.


  • Languages

    CSS, JavaScript, PHP, Sass, Dart, HTML, HTML5, SQL
  • Frameworks

    Flutter, Express.js, Divi, Bootstrap, SilverStripe, Laravel
  • Libraries/APIs

    React, jQuery, Node.js, Google Drive API, Spotify API, ReactiveX
  • Tools

    Sketch, Gutenberg Editor, Slack, Photoshop CC, Jekyll, Git, Terminal, Adobe Experience Design (XD), Webpack, Jira
  • Paradigms

    REST, BEM, Cross-platform, Reactive Programming, Agile, Functional Programming
  • Platforms

    cPanel, WordPress, WooCommerce, Firebase, Docker
  • Other

    Design, User Experience (UX), Page Speed Optimization, APIs, Interaction Design (IxD), PSD to HTML, SEO Audits, SparkPost, Full-stack, Serverless, WPEngine, Mobile Apps, UI Animation, PWA
  • Storage

    MySQL, NoSQL, MongoDB


  • Bachelor of Science degree in Computer Science with Philosophy
    2015 - 2018
    Durham University - Durham, UK

To view more profiles

Join Toptal
Share it with others