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Sii Sp. z o. o

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About Sii Sp. z o. o

With over 4 500 Power People, Sii is the top IT & engineering services provider in Poland. We support our clients within the scope of testing, software development, infrastructure management as well as system integration and system maintenance. We execute various projects for leading worldwide companies from such sectors as banking and finance, insurance, telecommunications, Hi-Tech, utilities, industry, FMCG and many others.

Fields of expertise: software development, testing services, IT operations, engineering services, embedded systems, Business Intelligence, Dynamics 365, Office 365, Salesforce, SAP, training services, digital, e-commerce, Business Process Outsourcing, Agile & Atlassian, cybersecurity, legacy systems.

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As of 2026-10-05. Organic ranks only; sponsored placements are never ranks.

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