What you will do

About Sofia Stars

Sofia Stars is an operational services company based in Sofia. We offer a range of solutions for online businesses, including R&D, Marketing, Customer Support, KYC, Risk, and Anti-Fraud services. With 300+ bright stars on our team, we deliver secure, reliable solutions with a touch of quality that shines. When you join us, you’ll be part of a place where ideas light up, and growth isn’t just a promise—it’s a journey.

❗️Please note that this role is office based for Sofia, Bulgaria (51, Blv. „Cherni Vrah“, Office „X“).

❗️If you need to be relocated, we take care of the process.

Role Description

As a Front-End Developer (ReactJS) you will take the lead in the frontend development of one of our key platforms, working from the ground up.

If you're passionate about building robust, user-friendly applications and thrive in a dynamic, startup-like environment, we'd love to hear from you!

Responsibilities:

• Design and develop a web platform that meets web-performance requirements;
• Close collaboration with Backend and DevOps teams;
• Develop and maintain the technical excellence of the team using the best approaches and engineering practices;
• Optimizing components of performance/quality perspective.

What we offer

We Offer:

• Official employment and full medical insurance (including in-patient and out-patient care, maternity, dental, and annual health check-ups);
• Competitive salary and attractive bonus scheme;
• Working in a dynamic International company;
• Birthday celebration present;
• Ability for career and professional growth within the company;
• Sportscard (Multisport) - partly covered & team-building events and activities;
• Sunny, spacious office;
• Wedding and newborn gifts;
• Breakfast, food vouchers, fruits, and snacks available in the office.

Requirements

Requirements:

• At least 5 years of commercial experience with React.js;
• Excellent Javascript knowledge;
• Proficiency with Typescript;
• Familiarity with testing frameworks and test runner frameworks;
• Practical experience in setting up styling standards, guidelines and best practices;
• Experience consuming REST APIs, GraphQL APIs;
• Clear understanding of SOLID/GRASP, client-side architecture, and design patterns;
• Awareness of cross-browser compatibility issues and client-side performance considerations;
• At least Upper Intermediate level of English.