Frontend Developer - Senior

Overview: 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. About Product: А PCI DSS certified payment gateway for online businesses, providing integration with payment systems via a single software platform. Learn more Key Responsibilities: Developing the back-office system using TypeScript and React; Building the payment interface and payment widgets using TypeScript and Preact; Developing client-side web widgets optimized for mobile devices; Collaborating within a Scrum team and actively participating in planning your own workflow; Contributing to architectural, infrastructural, and other strategic tasks; Conducting code reviews for team members and documenting your own code. Required Experience: 4-5+ years of hands-on experience in frontend development using React; English (Intermediate level) and Russian (Upper-intermediate level); Extensive experience with JavaScript (ES6+) and TypeScript; Proficiency in working with modern frontend frameworks (React, Preact); Strong skills in HTML and CSS; Ability to write testable code and create unit tests; Familiarity with Linux and an understanding of containerization (we use Docker); Familiarity with Figma. Nice to have: Knowledge of one or more modern approaches to application design (e.g., DDD, Clean Architecture, Hexagonal Architecture, etc.); Broad technical expertise and experience developing in one or more additional programming languages; Experience developing applications for financial systems or other industries where security and data integrity are critical requirements; Experience in iGaming; Experience building secure embedded interfaces: iframes, CSP, and WebView, including handling redirects, tab opening, and browser restrictions. Our Benefits: Full-time remote work opportunities and flexible working hours; Private insurance; An additional Day Off (1) per calendar year; Sports program compensation; Comprehensive Mental Health Programme; Free online English lessons with native speakers; Generous referral program; Training, internal workshops, and participation in international professional conferences and corporate events.