Quack, Quack.

Rubber Duck is a strategic digital partner to marketing and advertising agencies and companies developing internal digital products. The entire focus of the team is centered around ensuring a smooth and effective manner of cooperation.


Our top-notch software engineers can execute various projects, tailoring the perfect fit. From the innovative challenges of fresh and young start-ups to complex custom solutions for acclaimed global industry leaders, we do it all. We pride ourselves on the level of detail that goes into every single project. The outstanding quality, the approachability, and the expedient customer relationship management are key principles laid down in our corporate philosophy.

We are always happy to meet new people! Don’t hesitate to give us a shout at: 
quack /at/ rubberduck.xyz 

$50 - $99 / hr
10 - 49
Show all +
Sofia, Bulgaria
other locations


Key clients: 

The team has worked on the digital products of a wide variety of companies including leading players in the automotive and pharmaceutical industries in Europe, American media giants and luxourious air travel entities in the Middle East. We are also enjoying ongoing partnerships with some of the most prominent agencies in the Europe. 

The Design Hat Case Image

The Design Hat Case


The plan for attack was simple. Danny provides the
designs and we execute. In reality, the project involved a
significant amount of UX discussions and tweaks which
ensured a very intuitive and pleasant user experience.


Plain old html, ccs and javascript integrated into a
custom Wordpress CMS. Simple, stylish, effective.

Vanolia Image



Daniel and Pauline had the idea to create a beautiful app which
would organize all activities around a wonderful wedding. We were
contacted by Daniel as a result of a recommendation from a fellow
entrepreneur in Germany. His request was to speak about the
project and maybe meet if we liked each other.

Daniel took the flight to Sofia in a couple of days and we discussed
the technical options for Vanolia's implementation. With little
programming knowledge and no tech people on the team, Daniel
wanted to know what were the pros and cons to all the technologies
which we were mentioning.

After going over all possible solutions we decided that a hybrid
application based on Ionic would be a very stable and cost effective
solution - the functionality of the app allowed for the use of hybrid
technology and the technology in its turn allowed for significant cost
reductions compared to native developments.

Without wasting too much time, we did a complete redesign of the
website and built the application from scratch.

Vanilla was able to apply and successfully raise multiple rounds of
financing using our solution.


Ah! Brew Works Image

Ah! Brew Works

Ah! is an innovative beer company which has revolutionised craft beer in the region by adding ingredients like traditional mursalski tea, goji berries and thyme.

Along with the taste of their beer, the creators have revolutionised the business concept of beer packaging by featuring promising artists on each new label.

It is only natural that this type of folk would need a different type of