Senior Frontend Developer

About the Role

We are looking for a Senior Frontend Developer to join PlainID, the market-leading authorization platform, and help build the next generation of our leading cybersecurity product.

You will take ownership of end-to-end user experience development using React, building scalable, high-performance applications within a modern, cloud-based, multi-tenant SaaS architecture. You will improve existing features, contribute to UI architecture and testing strategy, and play a direct role in shaping system performance, code quality, and overall engineering standards.

Working closely with Product Managers, Backend Developers, and QA Engineers, you will deliver impactful features in a dynamic R&D environment, leverage AI-assisted development tools, and help drive continuous improvement across the platform.

Key Responsibilities

• Develop complex React-based frontend components within a scalable SaaS product
• Contribute to frontend architecture and scalable infrastructure design
• Write high-performance, maintainable, and reusable code
• Design and implement UI integration and component tests using modern testing frameworks
• Collaborate closely with Product Managers, Backend Engineers, and QA teams
• Participate in limited backend development using Java or Go
• Work in an Agile environment with CI/CD, TDD/BDD, and Extreme Programming practices
• Meet performance goals and product KPIs

• 7+ years of experience building React-based applications, with strong knowledge of software architecture, design patterns, and scalable front-end infrastructure.
• Hands-on experience using AI-assisted development tools (e.g., Cursor, GitHub Copilot, or similar) as part of the coding workflow — including code generation, refactoring, and documentation.
• Experience writing UI integration and component tests, using modern testing frameworks and best practices.
• Proven ability to write high-performance, maintainable, and reusable code, with attention to developer experience and long-term code health.
• Nginx experience - an advantage.
• Node.js experience - an advantage.
• Go or Java experience - an advantage.
• Background in authentication and authorization flows, including modern protocols - an advantage.
• Strong understanding of Cyber Security domain - an advantage.

Nice to have

• Experience working with Nginx
• Experience with Node.js
• Experience with Go or Java
• Background in authentication and authorization flows and modern protocols
• Understanding of the cybersecurity domain