Senior Frontend Developer – Tech Lead

This is a fully remote position, open to applicants in Romania.

📋 Description

• Take charge of the technical direction for intricate front-end features.

• Provide support to the team through design choices, reviews, and mentorship.

• Design and implement sophisticated front-end features using React and Next.js.

• Establish scalable architecture with well-defined boundaries between UI, business logic, and data access.

• Create reusable component libraries and maintain consistent component APIs.

• Integrate REST APIs and ensure API contracts are validated in collaboration with backend teams.

• Analyze and enhance performance, focusing on code splitting, lazy loading, and bundle analysis.

• Develop graphics-intensive interfaces utilizing WebGL, three.js, or React Three Fiber.

• Integrate mapping SDKs and oversee coordinate systems, provider fallbacks, and API tokens.

• Construct components for seamless integration into an existing host application while avoiding unintended global side effects.

• Develop and uphold testing strategies using Vitest or Jest and React Testing Library.

• Contribute to CI/CD pipelines, Git workflows, and conduct pull request reviews.

• Guide team members by breaking down tasks, estimating workload, and producing technical documentation.

• Implement front-end security principles and aid in production observability, releases, and incident investigations.

⛳️ Requirements

• 5 to 8 years of relevant experience.

• Advanced proficiency in React, Next.js, TypeScript, and modern hooks-based component design.

• Capability to design scalable front-end architecture with a single source of truth and clear delineations between UI, business logic, and data access.

• Experience in creating reusable component libraries and ensuring consistent component APIs.

• Extensive knowledge of Zustand, Redux Toolkit, or a similar state management approach, including efficient selector design.

• Strong skills in HTML, CSS, and SCSS, with a focus on responsive design, accessibility, and style isolation.

• Experience in implementing interfaces based on detailed visual specifications and utilizing design systems like IBM Carbon or Material UI.

• Solid REST API integration experience, including typed models, adapters, polling, and defensively handling missing or inconsistent data.

• Experience in defining or validating API contracts with backend teams and applying contract-testing principles.

• Proven expertise in performance optimization, including profiling, memoization, code splitting, lazy loading, and bundle analysis.

• Understanding of frame rate, GPU utilization, and memory behavior on graphics-heavy screens.

• Practical experience with WebGL, three.js, or React Three Fiber, including scene and camera control, pointer picking, and animation timelines.

• Experience managing events and interactions across layered UI and graphic surfaces.

• Proficiency in integrating map SDKs, managing coordinate systems, implementing provider fallbacks, and securely handling API tokens.

• Ability to create components that seamlessly integrate into an existing host application through clean props and callbacks, isolated styles, and no unintended global side effects.

• Strong testing background with Vitest or Jest and React Testing Library, supported by a practical testing strategy.

• Familiarity with strict TypeScript, error boundaries, cross-browser testing, and browser DevTools.

• Experience contributing to CI/CD pipelines, Git workflows, and delivering high-quality pull request reviews.

• Experience with Azure DevOps.

• Proven technical leadership through mentoring, task breakdown, estimation, and technical documentation.

• Understanding of front-end security fundamentals, including secure environment configuration, safe logging, and responsible use of third-party dependencies.

• Good to have: experience with advanced animation libraries such as GSAP or Framer Motion.

• Good to have: experience with charting and data visualization libraries.

• Good to have: experience with visual regression testing or end-to-end testing using Playwright.

• Good to have: experience with internationalization and localization at scale.

• Good to have: familiarity with micro-frontends, monorepos, or design system governance.

• Good to have: experience with production observability, release support, and incident investigation.

• Good to have: experience leading technical discovery or proof-of-concept work for complex interactions.

🏝️ Benefits

• Remote work opportunities.

• Contract position.