Senior Frontend Engineer

At Avaron, you get the security of permanent employment combined with the variety of working at different customers. We place specialists across everything from tech, IT and industry to project management and business support – and whatever the assignment, you have a consultant manager who is there for you and your development.

You will take a key role in building modern frontend solutions for a product environment with high demands on scalability, accessibility, performance, and security. The role spans the full journey from design decisions to production delivery, with real influence over architecture, engineering standards, and how teams build reliable user experiences at scale.

You will work closely with product, design, backend, SRE, and security to turn requirements into robust solutions that perform well in production. This is an exciting opportunity for you who enjoy combining hands-on development with technical leadership in a complex environment.

• You will own end-to-end delivery of advanced frontend features using TypeScript and React.
• You will design scalable and maintainable frontend architectures for large enterprise applications, including modularization, code splitting, and performance improvements.
• You will drive state management strategy using tools such as Redux, Zustand, or React Query to create predictable data flows.
• You will build integrations toward APIs and BFF layers, and contribute to Node.js services when needed.
• You will turn product and design requirements into accessible, responsive, and high-quality UI with semantic HTML and WCAG-compliant implementation.
• You will optimize rendering, bundle size, network usage, and caching to improve application performance.
• You will help define coding standards, patterns, and best practices across the codebase.
• You will review code, mentor other engineers, and help raise the overall engineering quality.
• You will troubleshoot issues proactively and resolve complex production problems using structured debugging, logging, and observability tools.
• You will contribute to secure development practices, testing strategies, CI/CD pipelines, and release processes.
• You will work in an Agile setup where you break down work, estimate effort, and deliver iteratively.

• Strong experience building complex frontend applications with TypeScript and React.
• Ability to take ownership of frontend delivery from design through production.
• Experience designing scalable frontend architecture for large applications.
• Strong knowledge of state management patterns, for example Redux, Zustand, or React Query.
• Experience integrating frontend solutions with APIs and BFF layers.
• Practical experience with Node.js.
• Good understanding of accessibility, semantic HTML, responsive CSS, and WCAG-compliant development.
• Experience with performance optimization in frontend applications.
• Ability to work with code reviews, mentoring, and engineering best practices.
• Experience with testing approaches such as unit, integration, and end-to-end testing.
• Understanding of secure coding, input validation, authentication flows, and data protection.
• Comfort working closely with cross-functional teams in an Agile environment.

• Experience from payment-related solutions, such as checkout flows, PCI considerations, or transaction handling.
• Broader full-stack experience with Node.js, API design, and BFF patterns.
• Familiarity with cloud platforms and edge or CDN strategies.
• Experience working with design systems and component libraries at scale.

• Permanent employment at Avaron AB
• Occupational pension
• Wellness allowance of SEK 5,000 per year

Selections are made on an ongoing basis – apply as soon as you can.