Senior Front-end Developer

Working as a Senior Front-end Developer, you will: • Design, develop, and maintain modern web applications using React and Angular (2+) • Build new features and continuously improve existing functionalities • Ensure high quality of code through testing (unit, integration, and end-to-end) • Collaborate closely with cross-functional, international teams (developers, designers, Product Owners, domain experts) • Contribute to architectural decisions and application performance optimization • Work with APIs (REST, GraphQL) and real-time solutions (e.g. WebSockets) • Support debugging and troubleshooting, including bug fixing when needed • Create and maintain technical documentation • Participate in agile development processes and CI/CD practices About Chabre IT Services Chabre IT Services is a global professional IT services provider, building long-lasting relationships with Enterprises. We specialize in the delivery of tailor-made solutions,  smart outsourcing, try&hire, and success fee services. We are a smart IT boutique with unique knowledge, which will deliver your ideas into reality. About our Client Our client is an international organization delivering advanced digital solutions in the areas of environmental analysis, engineering, and sustainability. They combine scientific expertise with modern technology to support global initiatives related to water and environmental management. The company operates in a highly collaborative, international environment and focuses on building impactful, data-driven products used worldwide. Qualifications • At least 5 years of professional experience as a Front-end Developer • Strong knowledge of JavaScript (ESNext) and TypeScript • Solid experience with React and its ecosystem • Experience with Angular (2+) • Strong understanding of HTML, CSS, and Responsive Web Design (RWD) • Good understanding of browser differences and application performance optimization • Experience with testing frameworks (Jest, Vitest, Playwright, Cypress, or similar) • Experience working with APIs (REST, GraphQL) • Familiarity with Docker • Experience with CI/CD tools (e.g. Azure DevOps) • Strong understanding of application architecture and system stability • Good command of English (both spoken and written) We offer • Rate up to 150,00 PLN/h + VAT • Remote/Hybrid work (occasional visits to the office in Rzeszów) • Subsidy for peripherals in the amount of 500,00zł • Working tool (MacBook Pro or Lenovo Legion 5) • Co-financing of courses related to the position • Benefits: MultiSport, Medicover