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    • Strong React skills and experience with the Redux state container. Or strong experience with other front-end frameworks combined with an attitude that allows you to learn React and Redux fast!
    • Robust knowledge of ES2015+, HTML5 and CSS3
    • Extended knowledge of Design Patterns and S.O.L.I.D. principles. Uses them instinctively
    • Experience working with and designing REST API’s and familiarity with schema-based API’s (OpenAPI, json-api, etc.)
    • Experience in working with an NPM based workflow and/or other package management systems
    • Experience with Unit Testing (Jest or similar)
    • Knowledge of optimization of frontend resources and requests
    • Comfortable and skilled in doing solution architecture


    And if you happen to have some of these skills, it would be truly awesome:

    • Experience with Webpack
    • Experience with GraphQL
    • Experience with Node.js and ExpressJS API’s
    • Test Automation (Selenium)  and CI/CD
    • Our stack is based on React, ExpressJS, PHP, AWS and Docker


    Job no. 190718-V8RCB

    Why Sii

    Great Place to Work

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    Fascinating projects

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    We share the profit with Workers

    last year we allocated PLN 23 M to this benefit

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    PLN 1 000 000 per year for your ideas

    with this amount, we support the passions and voluntary actions of our workers

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    7 500 experts and many development opportunities

    Tech Communities, workshops, a training platform, and a technology blog – you choose

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    Employment stability

    revenue of EUR 480M, no debts, since 2006 on the market

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    Great, comfortable offices

    perfect place to work, integrate, have fun together, and celebrate successes

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    Open-minded and available management team

    quick decision-making, we’re all on a first-name basis

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    True values

    these are not empty words – we’re guided by them every day

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    Fantastic atmosphere

    created by all Sii Power People

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    Attractive benefits package

    private healthcare, benefits cafeteria platform, car discounts and more

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