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Digital IT Infrastructure Service Desk & User Support Testing & QA Data & Analytics Embedded Systems
Industrial Engineering BPO Cloud Cybersecurity Enterprise Platforms Consulting
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Global Atlassian Cloud environment for Puma – from migration to 24/7 operations

Global Atlassian Cloud environment for Puma – from migration to 24/7 operations
Automating financial analysis – AI accelerates market publications for Infront

Automating financial analysis – AI accelerates market publications for Infront
Berlingske Media enters the digital-first era – platform modernization with Sii Poland 

Berlingske Media enters the digital-first era – platform modernization with Sii Poland 
Quality Control Center for ABB – gaining control over IT system quality

Quality Control Center for ABB – gaining control over IT system quality
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High Tech & Semiconductors Industrial Manufacturing Telecommunication Payment Solutions Retail Banking Corporate & Investment Banking Insurance Fintech
Healthcare Life Science Medical & Diagnostics Devices Automotive Aerospace, Maritime & Defense Rail & Mobility Software Vendors
Public Utilities, Energy, Oil & Gas Media & Entertainment Retail & E-commerce Fashion, Apparel & Luxury Goods Consumer Products, Food & Beverage Logistics, Warehousing & Packaging
Latest news
The .NET Developer job in practice - interview with a Sii Expert 

The .NET Developer job in practice - interview with a Sii Expert 
The Evolution of Financial Services Outsourcing: AP/AR at the Core of Modern Finance

The Evolution of Financial Services Outsourcing: AP/AR at the Core of Modern Finance
Sii Poland celebrates its 20th Anniversary: From a one‑person startup to a team of 7 500+ IT experts

Sii Poland celebrates its 20th Anniversary: From a one‑person startup to a team of 7 500+ IT experts
Effective Automation System Commissioning: From Automotive to Intralogistics

Effective Automation System Commissioning: From Automotive to Intralogistics
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Take control over your cloud costs with FinOps

Take control over your cloud costs with FinOps
DevSecOps Done Right: Embedding Security Without Sacrifices

DevSecOps Done Right: Embedding Security Without Sacrifices
Leveraging AI and Playwright for efficient UI & API testing

Leveraging AI and Playwright for efficient UI & API testing
Penetration tests of IoT devices

Penetration tests of IoT devices
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Latest blog articles
Beginner's guide on how to start testing a website's accessibility

Beginner's guide on how to start testing a website's accessibility
What if we didn’t test at all? What a project without a testing process would look like

What if we didn’t test at all? What a project without a testing process would look like
AEM sites configuration with Sling Context-Aware Configuration

AEM sites configuration with Sling Context-Aware Configuration
ServiceNow and SLA

ServiceNow and SLA
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We’re celebrating our birthday!

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We’re celebrating

OUR
BIRTHDAY!

OUR
BIRTHDAY!

See the video summarizing 20 years of Sii

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We are Power People

Get to know us and let's work together

We are

POWER
PEOPLE

Power People

Get to know us and let's work together

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Remek, Senior Test
& Analysis Engineer

Remek, Senior Test
& Analysis Engineer

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Career at Sii

Check out the offers and grow in the best place to work

CAREER
AT SII

CAREER AT SII

Check out the offers and grow in the best place to work

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Sii Łódź team

Sii Łódź team

WHY US

We are the Poland’s #1 partner for technology consulting, digital transformation, engineering, and business services, empowering companies to innovate and grow.

Let the numbers speak

7 500+

Power People

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PLN 2.1 BN

yearly revenue

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Since 2006

on the market

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#1 CIT

Payer in the IT industry in Poland

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POWER PEOPLE AT WORK

Check out what they do and why they chose Sii

Szymon Nagórski
What I like most is that I have an impact
Szymon covers his journey at Sii, from joining the team to advancing his career and earning an international certification that recognizes his skills.
Szymon Nagórski Magento Frontend Developer
Szymon Nagórski Magento Frontend Developer
Justyna Dziadosz
Power People is simply Sii
Justyna shares what she values most about Sii as an employer and explains why team alignment is so important from her perspective.
Justyna Dziadosz Project Manager
Justyna Dziadosz Project Manager
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Sii stands out for its unique benefits
Jędrzej discusses the importance of effectively communicating decisions to clients and understanding their needs. He shares what activities he enjoys beyond technical project involvement he uses his professional experience in external events
Jędrzej Kalinowski Java Architect
Jędrzej Kalinowski Java Architect
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My ideas are taken into account
Ula shares how she uses her skills as a Project Manager, trainer, and mentor. She discusses the value of being heard in shaping processes and her experiences with the shooting sports community at Sii Poland.
Urszula Kosicka Agile Coach
Urszula Kosicka Agile Coach
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I enjoy the flexibility at Sii
Darek talks about the flexible work approach at Sii Poland that allowed him to develop in two roles and expand his knowledge in Data & Analytics through various courses.
Dariusz Kowalski Data Analyst
Dariusz Kowalski Data Analyst
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OUR CASE STUDIES

OUR CASE STUDIES

OUR CASE STUDIES

Learn how we supported Qiagen in cancer detection, genetic analysis, and criminal ID tech
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https://sii.pl/wp-content/uploads/2024/09/Qiagen_exp-1.png

OUR CASE STUDIES

OUR CASE STUDIES

OUR CASE STUDIES

Find out how Salesforce implemented by Sii changed the sales process at Diagnostyka
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https://sii.pl/wp-content/uploads/2024/10/diagostyka_exp.png

OUR CASE STUDIES

OUR CASE STUDIES

OUR CASE STUDIES

Check out advanced fintech solutions based on microservices via our partnership with Interhyp
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https://sii.pl/wp-content/uploads/2024/09/interhyp_exp-1.png

DISCOVER OUR OFFER

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OUR CLIENTS

We are a partner in digitalization for global brands

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Clients' opinions

See how customers review the services provided by our experts

„Sii Poland ensures that changes are smoothly integrated without disrupting delivery timelines or quality.”
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Mateusz Pawlak Project Manager
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„What stood out was their sense of ownership. They acted like part of our internal team.”
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Robert Vuković Director of Engineering
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„Their process was smooth and well-managed.”
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Bartosz Skłodowski Deputy Head of Sales
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  • Poland
„It impressed us that they were so helpful, responsive, and knowledgeable.”
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Christer Granberg Technical Director
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„Their good contact, flexibility, responsiveness, and valuable consultants impressed us.”
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Przemysław Jezierski IT Manager
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„Sii Poland stands out for their ability to attract top professionals, consistently delivering high-quality candidates.”
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Halldor Gislason Head of Software Development
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„There is always a strong sense of trust between our teams.”
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Kristian Helner Director of IT Dev & Service Excellence
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„The team consistently delivered high-quality results and demonstrated excellence across all aspects of their work.”
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Harinder Singh Bora Head of integration & System Testing
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Expertise
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„We chose Sii Poland because of their large consultant base and their ability to source niche talent quickly.”
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Elise Stasiuk Director of Software Engineering
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WE PARTNER WITH TECHNOLOGY LEADERS

CERTIFICATES THAT PROVE OUR STANDARDS

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RECENT HIGHLIGHTS

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