Senior React Developer

Bulgaria

About the Position

Xebia is a global AI-first, digital transformation, and engineering partner. With over 25 years of experience and a team of 5,000 professionals across 16 countries, we help organizations design and build scalable products, platforms, and data-driven solutions.

We specialize in Artificial Intelligence, Data and Cloud, Intelligent Automation, and Digital Products, combining deep technical expertise with a strong focus on engineering excellence and a people-first culture.

In the CEE region, we’re a team of nearly 1,000 experts delivering modern applications, data platforms, and AI solutions for clients such as Millennium, ING, Play, Edenred, Arabian Drilling, FedEx, Leroy Merlin, Truecaller, Volotea, Schmitz Cargobull, and many, many more. We work with leading technologies including AWS, Azure, GCP, Databricks, and Snowflake, and combine strong engineering culture with a consulting mindset and a continuous focus on growth and knowledge sharing.

About the Project

We are looking for a Senior React / TypeScript Frontend Engineer to join a project delivered for a leading international transportation company specializing in railcar leasing, maintenance, and telematics services. With more than 125 years of international experience, the company operates across more than 20 countries and manages a large fleet of modern tank and freight railcars.

This role is focused on developing and evolving modern, business-critical web applications using a contemporary React and TypeScript technology stack. You will be working with a modern frontend architecture built around React, Nx, Vite, and a strong focus on quality, testing, maintainability, and developer experience.

Responsibilities

• Developing modern frontend applications using TypeScript and the latest version of React with React Compiler
• Building and maintaining applications within an Nx monorepo
• Developing reusable UI components and frontend architecture using React and MUI
• Implementing responsive and maintainable styling using Emotion
• Building and maintaining reusable components and documenting them through Storybook
• Developing forms using React Hook Form and implementing schema validation with Zod or Superstruct
• Managing application state and data fetching using Zustand and TanStack Query
• Developing and maintaining unit and integration tests using Vitest and React Testing Library
• Implementing end-to-end tests using Playwright
• Ensuring code quality and consistency through ESLint, Prettier, Husky, Commitizen, and Commitlint
• Working with Vite as the module bundler and pnpm as the package manager
• Implementing logging and application monitoring using CloudWatch RUM
• Collaborating with other engineers and stakeholders to deliver maintainable and scalable frontend solutions
• Applying AI-assisted development tools such as Cursor, GitHub Copilot, and Claude throughout planning, implementation, code review, and testing
• Evaluating different AI models based on their capabilities, cost, and suitability for specific development tasks
• Applying knowledge of MCP (Model Context Protocol) and identifying relevant use cases for AI-assisted development
• Contributing to frontend best practices, code reviews, testing, and continuous improvement

Requirements

• Strong professional experience with TypeScript and React
• Hands-on experience building production-grade frontend applications
• Strong understanding of modern React development and component-based architecture
• Experience working with Nx and monorepo-based frontend projects
• Experience with modern frontend build tools such as Vite
• Experience with component libraries such as MUI and styling solutions such as Emotion
• Experience with React Hook Form and schema validation libraries such as Zod or Superstruct
• Solid understanding of frontend state management and data fetching, preferably with Zustand and TanStack Query
• Strong experience with frontend testing, including unit and integration testing with Vitest and React Testing Library
• Hands-on experience with Playwright or another modern E2E testing framework
• Understanding of frontend code quality and development tooling such as ESLint, Prettier, Husky, and Commitlint
• Experience with Git and modern software development workflows
• Strong understanding of frontend performance, maintainability, and scalability
• Ability to work independently while collaborating effectively with other engineers and stakeholders
• Practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery
• Work from the European Union region and a work permit are required

Nice to Have

• Hands-on experience with React Compiler
• Experience developing and maintaining component libraries with Storybook
• Experience with CloudWatch RUM or similar frontend observability solutions
• Practical experience with AI-assisted development using Cursor, GitHub Copilot, or Claude
• Knowledge of MCP and AI-assisted engineering workflows
• Experience evaluating and selecting AI models based on cost, capabilities, and use case
• Experience working in large-scale Nx monorepos
• Experience with modern frontend architecture and design systems
• Experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work
• Interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches

Recruitment Process

• CV review
• HR call
• Interview
• Client Interview
• Decision

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