[Hiring] Senior Frontend Engineer @Perkbox

Role Description

As we continue to grow our Bulgaria-based team, we’re hiring an experienced Senior Frontend Engineer to play a key role in shaping the future of our product. Working as part of a cross-functional squad, you'll design and deliver scalable, high-performance user interfaces that serve millions of users, while helping drive frontend best practices, performance, accessibility, and consistency across our platform.

What you’ll be responsible for:

• Develop and maintain responsive user-facing features using React.js, React Native, and TypeScript.
• Translate wireframes and design prototypes into high-quality, reusable code.
• Build and maintain modular frontend components and libraries to promote consistency and scalability.
• Collaborate on frontend solutions across both web and mobile applications, ensuring performance, usability, and consistency.
• Manage complex data flows using Apollo and modern state management practices.
• Leverage AI-assisted development tools to improve productivity and adopt emerging technologies.
• Optimise applications for performance across browsers, devices, and screen sizes.
• Write clean, maintainable, and testable code, including unit and UI integration tests.
• Collaborate closely with backend engineers to deliver seamless user experiences.
• Participate in sprint planning, code reviews, and agile ceremonies.
• Diagnose and resolve performance issues, bugs, and frontend reliability challenges.

Requirements

• 4+ years of commercial experience building frontend applications with React.
• Strong knowledge of JavaScript, TypeScript, HTML, and CSS.
• 1+ year of React Native experience (backed by a strong React and TypeScript foundation).
• Experience working with Apollo or similar state and data management solutions.
• Proven ability to build reusable components and frontend libraries.
• Experience translating designs and wireframes into polished user experiences.
• Strong understanding of frontend performance optimisation techniques across web and mobile applications.
• Experience using Git and collaborative development workflows.
• Broad understanding of modern web architectures and development best practices.
• Exposure to AI-enabled development tools and workflows.

Work Mode & Salary

• Remote working within Bulgaria only.
• We do have an office in Plovdiv should you wish to work hybrid.
• Gross annual salary: €50,000 to €56,000 based on experience.

Interview Process

• Online interview with the Senior Talent Advisor.
• 75-minute technical interview with Engineering Leads.
• 45-minute final interview with the Director of Engineering.

Diversity & Inclusion

At Perkbox, we’re committed to building an inclusive workplace for all. We welcome applications from candidates of all backgrounds and are happy to provide reasonable adjustments where needed. Your comfort and success matter to us!