R/Shiny Developer

About the job:
Full-time
About Appsilon

Appsilon is an ambitious and fast-growing software house and consultancy specializing in actions support systems and machine learning with Fortune 500 clients across the globe. We are a unique company inspired by a mission to improve our society and environment. 

We are a global leader in R and Shiny, which are used by companies of all sizes to build data applications. When companies run into difficult problems or want to initiate large-scale enterprise projects, they come to Appsilon.

Before you apply, please read our code of conduct.

Every few months we start completely new projects and dive into a completely new world. One day we learn the secrets of promotions in retail chains, another day we analyze satellite images, and then we get super interesting data from the residential market for analysis. Our projects are not only an opportunity to test our skills in difficult statistical, algorithmic, and technological problems but also an opportunity to learn how many different industries work from the inside.

Tech Stack that you can expect in Appsilon: R, Shiny, JavaScript, React.js, Python, Docker, Git, AWS, HTML, CSS/ Sass 

We are growing fast and that’s why we are now looking for a new R/Shiny Developer to join our team. 

Your tasks:
Experience in building advanced Shiny apps, especially for large customers. 
Understanding of limitations of R and Shiny and proposing ideas on how to overcome them. You should have knowledge of advanced mechanisms of Shiny (e.g. bindings, register DataObj, performance, promises, single-threading, etc.) and effectively use it in practice.
Knowledge of how to scale Shiny to 1000s concurrent users. Contribution to performance optimization on different levels (frontend, backend, infrastructure). Understands the way Shiny uses WebSockets. 
Experience in implementing visually impressive apps independently from a Graphic Designer
Experience in extending Shiny apps with advanced functionalities e.g. using custom bindings, JS events in Shiny, JS-Shiny communication, Web Components, etc.
Experience in delivering solutions known for high quality thanks to well balanced test pyramid. 
Fluent written and verbal communication in English.
What we expect from you:
Experience in building web applications or websites using R/Shiny or JavaScript or Python
If you don’t know R/Shiny now – openness and willingness to learn
Implementing visually attractive apps based on the input from the UX/UI Designer
Experience in using unit testing as a natural technique for improving your code structure. Automates other tests such as end-to-end or performance tests
Fluent written and verbal communication in English
You have a valid passport or ID Card
What’s in it for you:
Up to 22.000 PLN/month +VAT on a B2B contract ($5400/month)
26 days of paid holidays + an equivalent of public holidays in Poland, est. 11 days in 2022
+5% of salary in Professional Development Budget to spend on activities that help you grow
33 days (paid 80%) per year on B2B when on a sick leave
4 paid days per year to be used for training/conferences, events, or workshops
Remote work-first working culture with flexible working hours to adjust to your family life
Private health care insurance for you and your family
Life insurance for you and your family
FitProfit or FitSport membership card (in Poland)
AskHenry – a personal assistant works great in large Polish cities, elsewhere limited to online support
Opportunity to work with the prestigious brands where you can see how data science is used
Opportunity to develop yourself as an independent Shiny expert in a data science community
What can you expect during the recruitment process?
Screening call
Home assignment
Tech and Culture Fit Interview (we cherish our values, you can read about it more here: