Mostar, Bosnia and Herzegovina On-site Employment

ILLUMINOS is hiring a Frontend (React) Developer

About the Role

Responsibilities

  • Build and maintain front-end features using React + Next.js
  • Implement responsive UI with strong attention to UX details
  • Integrate the UI with backend services via REST APIs (data fetching, auth flows, error handling)
  • Help shape and improve front-end architecture (component structure, state patterns, maintainability)
  • Improve performance and quality (rendering, bundle size, caching strategies where relevant)
  • Collaborate closely with backend and product to deliver features end-to-end
  • Participate in code reviews and help keep engineering standards high

Requirements

  • 5+ years of professional experience in front-end development
  • Strong knowledge of React (modern patterns, hooks, component architecture)
  • Experience with Next.js (routing, SSR/SEO basics, data fetching patterns)
  • Excellent understanding of HTML/CSS, modern layout, and UX principles (not just “it works”)
  • Solid JavaScript (ES6+) skills
  • Experience integrating front-ends with REST APIs
  • Ability to work independently and make sound technical decisions
  • Experience working on production applications (not only demo projects)
  • Willingness to work fully on-site in Mostar (this is not a remote role)

Nice to Have

  • TypeScript
  • Testing experience (e.g., Jest, React Testing Library, Playwright/Cypress)
  • Experience with a UI library or design system (e.g., MUI/Chakra/AntD, or internal systems)
  • Strong understanding of performance, SEO, and front-end optimization
  • Great eye for design and details (pixel/UX polish)

Benefits

  • Work on real products (no agency churn)
  • Technically challenging work with clear standards
  • Real impact on product architecture and direction
  • Long-term collaboration and stability
  • A comfortable on-site work environment in Mostar
  • Compensation based on experience and skill level

Compensation

Compensation based on experience and skill level

Additional Information

  • Work location: Mostar
  • This is not a remote role
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About company
ILLUMINOS

Illuminos is a software agency that accelerates business growth with custom digital solutions. They specialize in business automation and SaaS product development, helping clients automate processes, launch digital products, and build scalable applications.

Their approach focuses on understanding client business goals and translating business logic into digital products. They emphasize a partnership model, aiming to turn prospects into long-term partners through beneficial relationships.

The company offers services including identifying inefficiencies in business processes and creating custom automation solutions, as well as providing experienced technical teams, technical project management, and long-term support for scalable and secure cloud-based applications.

All jobs at ILLUMINOS Visit website
Job Details
Department Software Development
Category frontend
Posted 4 months ago