Frontend Developer - Senior

<h2>Overview:</h2><p><span>The Payment Gateway is part of our growing fintech software and payment management system. The team works on providing clients with a payment platform designed to help online businesses manage and process monetary transactions worldwide.</span></p><h2>About Product:</h2><p>А PCI DSS certified payment gateway for online businesses, providing integration with payment systems via a single software platform.<br><a target="_blank" href="https://finteqhub.com/">Learn more</a></p><h2>Key Responsibilities:</h2><ul><li><p><span>Developing the back-office system using TypeScript and React;</span></p></li><li><p><span>Building the payment interface and payment widgets using TypeScript and Preact;</span></p></li><li><p><span>Developing client-side web widgets optimized for mobile devices;</span></p></li><li><p><span>Collaborating within a Scrum team and actively participating in planning your own workflow;</span></p></li><li><p><span>Contributing to architectural, infrastructural, and other strategic tasks;</span></p></li><li><p><span>Conducting code reviews for team members and documenting your own code.</span></p></li></ul><h2>Required Experience:</h2><ul><li><p><span>4-5+ years of hands-on experience in frontend development using React;</span></p></li><li><p>English (Intermediate level) and Russian (Upper-intermediate level);</p></li><li><p>Extensive experience with JavaScript (ES6+) and TypeScript;</p></li><li><p>Proficiency in working with modern frontend frameworks (React, Preact);</p></li><li><p>Strong skills in HTML and CSS;</p></li><li><p>Ability to write testable code and create unit tests;</p></li><li><p>Familiarity with Linux and an understanding of containerization (we use Docker);</p></li><li><p>Familiarity with Figma.</p></li></ul><h2>Nice to have:</h2><ul><li><p><span>Knowledge of one or more modern approaches to application design (e.g., DDD, Clean Architecture, Hexagonal Architecture, etc.);</span></p></li><li><p><span>Broad technical expertise and experience developing in one or more additional programming languages;</span></p></li><li><p><span>Experience developing applications for financial systems or other industries where security and data integrity are critical requirements;</span></p></li><li><p><span>Experience in iGaming;</sp