Senior React Next JS Developer

The Senior Frontend Engineer is responsible for development on complex web applications using React, Next.js, and TypeScript. This role is part of a broader architectural shift, transitioning from a monolithic .NET-based setup to a modern headless architecture for one of our clients. The position requires a strong technical understanding of full-stack boundaries to correctly identify and separate frontend and backend responsibilities.

We expect you to: 

• Take full ownership of complex application features, ensuring high-quality and timely delivery. 
• Independently drive development with a broader architectural and strategic view of the project.
• Collaborate closely with backend engineers, project leads, and the design team.
• Enforce and promote code quality standards and modern frontend best practices.
• Be able to mentor developers and new team members.
• Be experienced with AI-assisted development workflows.
• Ensure long-term code stability and reusability.
• Proactively identify and resolve issues related to security, usability, and performance.
• Participate in estimation processes, delivering accurate personal time and effort estimates.
• Integrate and evaluate new technologies relevant to project needs.
• Participate in knowledge sharing and departmental training sessions.
• Conduct technical audits and contribute to technical reporting.
• Follow and improve the development and release processes.

Required Experience:

• Minimum 5 years of professional experience working with frontend code.
• Proven experience working in agile development processes (SCRUM).
• Track record of leading frontend projects successfully.

Mandatory Skills:

• Strong communication skills in English.
• Extensive hands-on experience with TypeScript, React, and Next.js.
• Familiarity with .NET environments and experience working with Sitecore.
• Can read and understand .NET framework code.
• Solid understanding of and experience with automated testing.

Bonus Skills:

• Experience working with SCSS.
• Experience using Storybook.
• Proficiency and comfort using AI-assisted tools in peer coding workflows.
• Experience working with React Native.

Personal Traits:

• Self-driven and proactive mindset.
• Ability to work independently while keeping a holistic project overview.
• Passion for frontend development, AI and continuous learning.
• Strong sense of ownership and accountability.
• Enthusiastic about improving frontend ecosystems and tooling.