Job brief

DarkLion Studio is looking for a Senior Front-End Engineer to lead the development of cutting-edge digital experiences. This role requires a strong command of modern Front-End technologies, a keen eye for UI/UX, and the ability to collaborate seamlessly with designers and back-end engineers. If you thrive in a fast-paced, creative environment and are passionate about crafting pixel-perfect, high-performance interfaces, we’d love to have you on board.

Skills & Responsibilities

• Develop and optimise user-facing features using modern JavaScript frameworks (Next.js, React, Vue, or Angular)
• Ensure seamless performance across devices and browsers with a mobile-first approach.
• Write clean, maintainable, and scalable code following industry best practices.
• Collaborate closely with UI/UX designers to translate design systems into highly functional and visually engaging applications.
• Integrate APIs and manage application state using Redux, Zustand, Jotai, Context API, or similar tools.
• Work in tandem with backend and AI teams to consume and visualize AI-generated data such as text, diagrams, vector outputs, and analytics.
• Build dynamic UIs that interact with AI features like chat interfaces, smart suggestions, recommendation engines, and custom visual outputs.
• Handle and display complex AI responses in a user-friendly, secure, and performant manner — including streamed outputs, markdown, code blocks, charts, or embeddings.
• Implement robust error handling, loading states, and fallback UIs for unpredictable AI behavior.
• Lead technical discussions, mentor junior developers, and participate in code reviews.
• Optimize web applications for performance, speed, and scalability.
• Stay current with trends in Front-End and AI-powered UX design to drive innovation.

We want you onboard, if you have

• 4+ years of experience in Front-End development with a strong portfolio of responsive, performant web applications
• Advanced proficiency in Next.js and React.js, including SSR, SSG, and ISR.
• Solid knowledge of TypeScript and scalable component architecture.
• Hands-on experience in state management (Redux Toolkit, Zustand, Jotai, or Context API).
• Strong UI skills using Tailwind CSS, Chakra UI, Material UI, or Styled Components
• Experience integrating and handling RESTful APIs and GraphQL using Axios, Apollo Client, or URQL.
• Familiarity with authentication methods including NextAuth, Firebase Auth, OAuth, or JWT.
• Proven ability to build interfaces that consume and visualize AI-generated content (e.g., from OpenAI, LangChain, or custom AI APIs).
• Experience with real-time data rendering, streaming outputs, and building interactive visualizations (charts, diagrams, or vector spaces).
• Understanding of performance techniques: lazy loading, code splitting, and image optimization.
• Knowledge of SEO best practices and Next.js built-in SEO capabilities.
• Unit testing and Front-End testing using Jest, React Testing Library, Cypress, or Playwright.
• Familiarity with CI/CD workflows and deployment using Vercel (preferred), Netlify, or other cloud platforms.
• Experience with internationalization (i18n) using next-i18next or equivalent tools.
• Bonus: Experience working with AI-driven UX, chat interfaces, or visual editors based on AI logic.