Frontend Developer at Poland and Eastern Europe in Bulgaria, Bulgaria

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 McLaren, Aviva, Deloitte, Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, Allegro, InPost, 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 project:

We are looking for Frontend Developers to join a project delivered for our international client operating in the sustainability and ESG domain. The client is a well-established global organization with a strong presence in Europe, supporting complex internal business operations through modern digital platforms and enterprise applications.

This role is a great opportunity to work on a live production application undergoing a major modernization and migration initiative. You will contribute to the migration of an existing internal application from a legacy frontend stack into the client’s standardized internal platform and web component ecosystem. The project is not greenfield and not pure maintenance - it combines modernization, migration, and continuous delivery within an active business environment.

You will be:

• develop, maintain, and improve frontend applications within the client’s internal web component ecosystem,
• support the migration of existing React-based frontend solutions into a lit-html based architecture,
• build reusable UI components and frontend features aligned with the client’s internal standards and component libraries,
• collaborate closely with backend engineers working on the migration from Python-based pipelines to Java services,
• translate business and technical requirements into clean, maintainable, and user-friendly interfaces,
• create and maintain unit, integration, and browser-based automated tests,
• ensure high code quality through testing, debugging, code reviews, and continuous improvement activities,
• work closely with frontend developers, backend engineers, QA specialists, technical leads, and internal customer stakeholders,
• contribute to frontend architecture discussions, migration planning, and modernization activities,
• support the continuous improvement of development standards, engineering practices, and delivery workflows,
• depending on seniority, take ownership of technical areas, support architectural decisions, and mentor less experienced team member.

Your profile:

• commercial experience as a Frontend Developer in modern web application development,
• strong experience with JavaScript and TypeScript in frontend environments,
• good practical experience with React and component-based frontend development,
• interest in or experience with web components and modern frontend architecture patterns,
• experience working with reusable UI libraries and shared frontend components,
• practical understanding of lit-html or willingness to quickly learn and work within a lit-html based ecosystem,
• experience with unit, integration, and browser-based testing approaches and tools,
• good understanding of frontend application architecture, maintainability, and scalability,
• experience integrating frontend applications with backend services and APIs,
• solid knowledge of HTML5, CSS3, responsive web design, and browser compatibility,
• experience with Git and standard software development workflows,
• strong communication and collaboration skills in international engineering environments,
• 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:

• experience with web components or lit-html based solutions,
• experience working on migration or modernization projects involving legacy frontend stacks,
• knowledge of frontend architecture patterns in enterprise-scale applications,
• experience working in complex internal platform environments,
• 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