Senior/Lead React Developer

Project/Client: Banking Location: Baltic states + Poland Start Date: ASAP Seniority: Senior / Lead Language: EnglishRole Overview: As a Senior Frontend Engineer, you will play a key role in building a modern React-based micro-frontend architecture for banking systems. You will design and implement scalable frontend modules, develop high-quality user interfaces for Back Office applications, and ensure performance, security, and maintainability across the platform. This is a hands-on role combining technical leadership and active development, suited for an engineer experienced in React, TypeScript, and complex enterprise environments, working with backend integrations via REST APIs and GraphQL. Key Responsibilities: • Lead and mentor a team of React developers, providing technical guidance and conducting code reviews • Design and implement scalable micro-frontend architecture using modern frontend tooling • Develop high-quality frontend solutions using React, TypeScript, and state management (Redux, Zustand, Context API) • Build and maintain reusable UI components, shared libraries, and design systems • Collaborate with backend teams on integrations via REST APIs and GraphQL • Ensure best practices in performance, security, and accessibility • Contribute to CI/CD, automated testing (Vitest, React Testing Library, Playwright), and code quality improvements • Utilize modern development workflows, including AI-assisted tools (e.g., Copilot, Bmad workflow) Must-Have Requirements: • 5+ years of experience in frontend development with strong expertise in React • Strong proficiency in TypeScript and modern JavaScript (ES6+) • Hands-on experience with micro-frontend architecture • Experience with state management solutions (Redux, Zustand, Context API) • Experience using AI-assisted development tools (e.g., Copilot) • Solid understanding of CSS, SASS, and responsive design principles • Experience with testing frameworks such as Vitest, React Testing Library, and Playwright • Familiarity with CI/CD, Git, and Agile development practices • Strong understanding of REST APIs, GraphQL, and frontend-backend integration • Experience mentoring developers and leading technical decisions Nice to Have: • Experience in banking or enterprise environments • Knowledge of backend technologies such as Java, Spring Boot, Spring Security • Familiarity with event-driven architectures (e.g., Kafka) Note: We’ll be in touch only with candidates who move forward to the next stage.