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Senior React.js Developer

Senior React.js Developer

CycladKórnik
25 days ago
Job description

Senior React.js Developer

Miejsce pracy : Poznań

Technologies we use

Expected

  • JavaScript
  • TypeScript
  • HTML
  • SASS
  • LESS
  • GraphQL
  • Docker
  • React.js

Optional

  • CI / CD
  • Operating system

  • Windows
  • About the project

  • Location : Wrocław, Poznań, Kraków, 2 days from the office weekly
  • Budget : 120 PLN / net / h + VAT - B2B
  • Project language : English
  • Methodology : Scrum
  • Team Setup : Full-stack team of 10 engineers (Frontend, Backend, QA, Scrum Master)
  • Project Goal : Migration of an existing platform (governing 2000+ models) from IBM OpenPages to a modern technology stack to meet regulatory requirements.
  • Start Date : ASAP
  • End Date : 31.12.2025 (with a possibility of extension)
  • Your responsibilities

  • Build responsive, accessible, and maintainable UIs using React.js, JavaScript / TypeScript, and modern HTML / CSS
  • Apply best practices in state management using Redux, Zustand, or similar libraries
  • Contribute to a micro-frontend architecture, integrating with a microservices-based backend
  • Write and maintain unit and integration tests using Jest, React Testing Library, or Cypress
  • Collaborate with backend developers, designers, and product managers in an Agile environment
  • Participate in code reviews, contribute to UI consistency via component libraries (e.g., Material UI, Ant Design), and ensure clean, maintainable code
  • Work with CI / CD pipelines, containerization (Docker), and frontend observability tools (e.g., Sentry, Datadog)
  • Our requirements

  • 4-6 years of experience withReact.js and solid knowledge of JavaScript / TypeScript
  • Proficiency in HTML5 / CSS3 / SASS / LESS and responsive design principles
  • Experience with micro-frontend architectures and modular application design
  • Familiarity with REST, GraphQL, or gRPC for backend integration
  • Awareness of CI / CD, Docker, and observability tools
  • Fluent English (spoken and written)
  • Experience working in Scrum or Kanban teams
  • Strong communication, problem-solving, and collaboration skills
  • Willingness to mentor junior developers and contribute to team knowledge sharing
  • This is how we organize our work

    Team size

    This is how we work

  • at the client's site
  • you focus on a single project at a time
  • you have influence on the choice of tools and technologies
  • you have influence on the technological solutions applied
  • you develop the code "from scratch"
  • you focus on product development
  • agile
  • scrum
  • Team members

  • backend developer
  • frontend developer
  • scrum master
  • This is how we work on a project

  • Clean Code
  • code review
  • Continuous Deployment
  • Continuous Integration
  • documentation
  • testing environments
  • Development opportunities we offer

  • development budget
  • intracompany training
  • mentoring
  • substantive support from technological leaders
  • technical knowledge exchange within the company
  • What we offer

  • Full-time job agreement based on B2B
  • Private medical care with dental care (covering 70% of costs) + rehabilitation package. Family package option possible
  • Multisport card (also for an accompanying person)
  • Life insurance
  • Benefits

  • sharing the costs of sports activities
  • private medical care
  • sharing the costs of professional training & courses
  • life insurance
  • remote work opportunities
  • integration events
  • dental care
  • extra social benefits
  • employee referral program
  • Recruitment stages

  • HR Screen 30 min
  • Technical interview 1h
  • Cyclad

    In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting edge technologies that shape the world of the future.

    Please enclose the following statement in your application : I hereby give consent for my personal data contained in the submitted application documents to be processed by Cyclad sp. z o.o., ul. Chłodna 48 / 1, 00-872 Warszawa, including my image, in relation to my participation in the recruitment process. I acknowledge that the above consent may be withdrawn at any time.

    If you are interested in participating in future recruitment processes, please enclose the following statement in your application : I hereby give consent for my personal data contained in the submitted application documents to be processed by Cyclad Sp. z o.o., Cyclad sp. z o.o., ul. Chłodna 48 / 1, 00-872 Warszawa, including my image, in relation to my participation in future recruitment processes. I acknowledge that the above consent may be withdrawn at any time. The Personal Data Controller is Cyclad Sp. z o.o., ul. Chłodna 48 / 1, 00-872 Warszawa, e-mail : office@cyclad.pl, contact with the Data Protection Officer is available via e-mail : IOD@cyclad.pl. Personal data collected through job applications (CV) within the scope provided for in labor regulations shall be processed in order to allow performance of the ongoing recruitment pursuant to Art. 6(1)(a) of Regulation (EU) no. 2016 / 679 of the European Parliament and of the Council of 27 April 2016 on the protection of individuals with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95 / 46 / EC (further referred to as GDPR). In case of giving consent to processing of data for future recruitment processes – personal data shall be processed under the consent, pursuant to Art. 6(1)(a) of the GDPR. If the Application form contains data referred to in Art. 9(1) of the GDPR, it shall be necessary to have the candidates consent for the processing of such data (Art. 9(2)(a) of the GDPR). The consent can be revoked at any time. Withdrawal of the consent shall not affect the lawfulness of the processing that had been performed under the consent prior to its withdrawal. Personal data provided by the candidate related to : - participation in a selected recruitment process will be stored until the recruitment process is completed for a given position, - participation in future recruitment processes will be stored until the candidate's consent to the processing of their data for this purpose is withdrawn, no longer, however, than for 5 years since the last update of the candidate’s data. Personal data may be disclosed to employees or associates of the Company, entities providing support to the Company on the basis of outsourced services or in accordance with data processing agreements, to entities authorized under the law, as well as to entities collaborating with the Company within the scope of job placement, in order to conduct recruitment processes. After the employee’s consent, personal data may also be disclosed to a potential employer for whom the recruitment process is being conducted. Submission of the candidate’s personal data within the scope under Art. 221 of the Labor Code is obligatory for participation in the recruitment process. Submission of other data by the candidate is voluntary. No submission of personal data within the required scope or objection to the processing of such data shall result in lack of possibility to include the Application in the recruitment processes conducted by the Company. The candidate has the right to access and rectify the contents of their data, remove such data, limit its processing, transfer such data, submit objection to the processing and revoke the consent at any time, without affecting the lawfulness of the processing conducted under such consent before it was withdrawn. The candidate also has the right to file a complaint with the President of the Office for Personal Data Protection when they consider the processing of their personal data to be a violation of the provisions of the GDPR.

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