Sii Poland

Are you excited to create intuitive user interfaces for products trusted by millions worldwide? 
 
We’re partnering with a global leader in cloud communications, renowned for delivering real-time video, voice, and messaging solutions that power many popular platforms you likely use daily. We’re looking for a Senior Fullstack Developer with strong Node.js skills and a genuine passion for low-level programming. 
 
Ready to contribute to a product making a global impact? Let’s connect. Apply now and take your next big career leap. 
 
Your tasks 
 


* Develop front-end components for complex, real-time applications with a focus on scalability and performance
* Work closely with designers and backend teams to build intuitive and efficient user interfaces
* Implement and follow best coding practices to ensure maintainable and up-to-date code
* Collaborate with team members to share knowledge and improve development processes
* Participate in technical discussions and help make informed decisions to enhance system architecture 
 
 

Requirements 
 


* Minimum 5 years of professional experience in front-end or fullstack development, with strong skills in modern JavaScript and TypeScript
* Good knowledge of C++ or professional experience in the telecommunications industry, demonstrating familiarity with low-level programming concepts and system internals
* Proven experience with modern front-end frameworks
* Solid understanding of responsive design principles and performance optimization techniques
* Strong collaboration and communication skills in English (minimum B2 level), enabling fluent support and mentorship of team members in an international environment
* Residing in Poland required 
 
 

Job no. 250717-B65W1 
 
Benefits For You 
 
Great Place to Work 
 
Solid financial situation 
 
Contracts with the biggest brands 
 
Centre of internal trainings 
 
Many experts you can learn from 
 
Open and accessible management team 
 
Profit sharing 
 
Passion Sponsorship program 
 
Regular integration events and trips 
 
Comfortable and well-equipped offices 
 
MySii app 
 
Medical care

JavaScript

TypeScript

Node.js

Software Development

Responsive Design

Scalability

Team collaboration

Communications

Support

Front-End

Full Stack

Performance Optimization

Low level programming

Systems

Coding Style

User Interface Engineer

Telecommunications

Technical Architecture

System design

Fullstack Software Engineer with Node.js and C++