--- title: "IT Deweloper Blog — website development and SEO - Results from #9" description: "Articles on building and promoting websites: practical breakdowns, guides and hands-on experience from IT Deweloper for business owners in Poland and the EU. - Results from #9" url: "https://it-deweloper.pl/en/blog?start=9" date: "2026-09-23T03:08:09+00:00" language: "en-GB" --- [Skip to main content](#tm-main) - [ Home](https://it-deweloper.pl/en "IT Deweloper web studio home page") - [Contact](https://it-deweloper.pl/en/contact "Contact the IT Deweloper web studio") - [ +48 731 190 041](tel:+48731190041 "Phone") - [ office@it-deweloper.pl](mailto:office@it-deweloper.pl "E-mail") - [ Nowogródzka 4A, Białystok, Poland](https://maps.app.goo.gl/BNjvryytwRyv4omA7 "Address") - [ WhatsApp](https://wa.me/48731190041 "WhatsApp") - [ Telegram](https://t.me/+48731190041 "Telegram") - [Solutions](https://it-deweloper.pl/en/web "IT Deweloper's web development solutions") - [How we workStages of work](https://it-deweloper.pl/en/web/process "Website development stages and timelines") - [SEOSearch engine optimization](https://it-deweloper.pl/en/web/seo "SEO promotion: optimization, links, positions in Google") - [GEOWebsite promotion in AI](https://it-deweloper.pl/en/web/geo "GEO optimization: website promotion in ChatGPT, Gemini and Perplexity answers") - [AIArtificial Intelligence on the website](https://it-deweloper.pl/en/web/ai) - [JoomlaWebsite Management System](https://it-deweloper.pl/en/web/joomla "Joomla website development") - [Cost](https://it-deweloper.pl/en/cost "Rates and cost of services") - [PricingIndicative website development prices](https://it-deweloper.pl/en/cost/pricing "Website development prices") - [CalculatorSelf-service online estimate](https://it-deweloper.pl/en/cost/calculator "Calculate your website cost online") - [BriefGet an accurate project quote](https://it-deweloper.pl/en/cost/brief "Fill out the website development brief") - [Portfolio](https://it-deweloper.pl/en/portfolio "Portfolio and examples of our work") - [About us](https://it-deweloper.pl/en/about "About the founder — Victor Parhimchik") - 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[ +48 731 190 041](tel:+48731190041 "Phone") - [ office@it-deweloper.pl](mailto:office@it-deweloper.pl "E-mail") - [ Nowogródzka 4A, Białystok, Poland](https://maps.app.goo.gl/BNjvryytwRyv4omA7 "Address") - [ WhatsApp](https://wa.me/48731190041 "WhatsApp") - [ Telegram](https://t.me/+48731190041 "Telegram") - [Solutions](https://it-deweloper.pl/en/web "IT Deweloper's web development solutions") - [How we workStages of work](https://it-deweloper.pl/en/web/process "Website development stages and timelines") - [SEOSearch engine optimization](https://it-deweloper.pl/en/web/seo "SEO promotion: optimization, links, positions in Google") - [GEOWebsite promotion in AI](https://it-deweloper.pl/en/web/geo "GEO optimization: website promotion in ChatGPT, Gemini and Perplexity answers") - [AIArtificial Intelligence on the website](https://it-deweloper.pl/en/web/ai) - [JoomlaWebsite Management System](https://it-deweloper.pl/en/web/joomla "Joomla website development") - [Cost](https://it-deweloper.pl/en/cost "Rates and cost of services") - [PricingIndicative website development prices](https://it-deweloper.pl/en/cost/pricing "Website development prices") - [CalculatorSelf-service online estimate](https://it-deweloper.pl/en/cost/calculator "Calculate your website cost online") - [BriefGet an accurate project quote](https://it-deweloper.pl/en/cost/brief "Fill out the website development brief") - [Portfolio](https://it-deweloper.pl/en/portfolio "Portfolio and examples of our work") - [About us](https://it-deweloper.pl/en/about "About the founder — Victor Parhimchik") - [FAQ](https://it-deweloper.pl/en/faq "Frequently asked questions about website development") - [Blog](https://it-deweloper.pl/en/blog "Articles on website development and promotion") # IT Deweloper Blog Everything we learn at work and find worth sharing: technology and design, search and AI, security, tools, other people's mistakes and our own. Welcome to the blog of the IT Deweloper web studio. Follow us - [](https://www.facebook.com/ITdeweloper) - [](https://www.linkedin.com/company/it-deweloper) ![](https://it-deweloper.pl/images/yootheme/demo/blog-hero.svg) [ ![An invoice with the NIP field highlighted passes into the state system with a QR code](https://it-deweloper.pl/images/blog/ksef-sklep-strona-cover.webp#joomlaImage://local-images/blog/ksef-sklep-strona-cover.webp?width=1200&height=1200) 2026-09-08 ## KSeF: what your website and shop must handle KSeF is discussed as an accounting topic, but most of the work lands on the website. It is the shop that has to recognise whether a business or a consumer is buying, collect the N… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=103:ksef-sklep-strona&catid=29&lang=en-GB) [ ![A website screen with the accessibility symbol, a focus outline and the Tab key](https://it-deweloper.pl/images/blog/website-accessibility-law-cover.webp#joomlaImage://local-images/blog/website-accessibility-law-cover.webp?width=1200&height=1200) 2026-09-08 ## Website accessibility law in Poland: who it covers Since 28 June 2025 Poland has had a law that requires some companies to make their websites usable by people with disabilities. The fine goes up to ten times the average national… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=99:website-accessibility-law&catid=29&lang=en-GB) [ ![The page looks ordinary, but under a magnifier the hidden Japanese spam shows](https://it-deweloper.pl/images/blog/japanese-keyword-hack-cover.webp#joomlaImage://local-images/blog/japanese-keyword-hack-cover.webp?width=1200&height=1200) 2026-09-08 ## Japanese keyword hack: how I cleaned an infected site On the morning of 3 September 2026 the owner of savuk.eu came to me with an ordinary complaint: “Google shows some nonsense for my site.” The site itself opened normally — no brow… ](https://it-deweloper.pl/index.php?option=com_content&view=article&id=95:japanese-keyword-hack&catid=29&lang=en-GB) --- ## Build your website Find out what your website will cost [ Pricing ](https://it-deweloper.pl/index.php?Itemid=262&lang=en-GB) ![](https://it-deweloper.pl/media/yootheme/cache/3c/background-square-01-3c44c74f.png?src=images/yootheme/demo/background-square-01.png&thumbnail=900,900,&hash=72c31958) ![](https://it-deweloper.pl/media/yootheme/cache/cb/background-square-03-cbb341a0.png?src=images/yootheme/demo/background-square-03.png&thumbnail=600,600,&hash=6e9dde93) ### [ Contact ](https://it-deweloper.pl/index.php?Itemid=277&lang=en-GB) Web studio IT Deweloper website development, Poland. 5423493188 SEOAIAdsWebSMM ### Address Nowogródzka 4A Białystok, 15-490, PL [ ### Phone +48 731 190 041 ](tel:+48731190041) [ ### Email This email address is being protected from spambots. You need JavaScript enabled to view it. ](mailto:office@it-deweloper.pl) [ ### WhatsApp ](https://wa.me/48731190041) [ ### Telegram ](https://t.me/+48731190041) Opening hours: - Monday 0900–1800 - Tuesday 0900–1800 - Wednesday 0900–1800 - Thursday 0900–1800 - Friday 0900–1800 - Saturday 0900–1600 - Sunday closed ![IT Deweloper](https://it-deweloper.pl/images/Logo.webp) Web development can be interesting! Our social media, with content about building websites. - [](https://www.facebook.com/ITdeweloper) - [](https://www.linkedin.com/company/it-deweloper) - [Portfolio](https://it-deweloper.pl/index.php?Itemid=264&lang=en-GB) - [Contact](https://it-deweloper.pl/index.php?Itemid=277&lang=en-GB) - [About us](https://it-deweloper.pl/index.php?Itemid=261&lang=en-GB) **it-deweloper** — a web development studio. We design and build modern websites and online stores. © [it-deweloper](https://it-deweloper.pl/). All rights reserved. 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