Landing page
For a specific service, product, campaign or single goal.
- One page: offer, benefits, CTA and form
- Mobile layout, analytics and performance
- Technical preparation for search engines
DevSentinel
We design and build professional websites that can grow with your business
From landing pages and company sites to larger information architectures. When a website is no longer enough, we also build dedicated applications.
- Landing pages and company websites with a clear offer and a path to contact
- Sites ready for content growth and further development
- Search-engine-ready structure, performance and a solid mobile experience
A website as a business tool
Not a brochure “because we should have one”. A clear offer, a working mobile layout, performance and room to grow.
A considered process
Goal, audience and scope first. Then design, build and launch.
Readable on a phone
Layout and copy designed for the screen most clients actually use.
Performance and technical hygiene
Speed, a clean structure and search-engine-ready setup — without ranking promises.
Room to grow
After launch you can add pages, integrations, and an application when needed.
Which type of website fits your business?
Delivery levels, not a price list. We match the scope to the goal — from a campaign landing page to a larger site.
Company website
For a business that needs a complete, professional online presence.
- Homepage, offer, about, contact and service pages
- Forms, analytics and a responsive layout
- SEO-ready structure: headings, metadata, sitemap
Larger search-engine-ready site
For companies that want to grow content and architecture — not an “SEO package”.
- Multiple pages, a blog or knowledge hub
- Information architecture, schema.org, internal linking
- A structure ready for further content work or an SEO specialist
Comprehensive site
For companies treating the website as a serious business tool.
- Many pages, custom components, multilingual setup
- Integrations, analytics and a more advanced structure
- Room for further development, automation and applications
demo.devsentinel.pl · 6-direction showroom
See how your company website could look
See how your company website could look — interactive showroom.
Open showroom
Construction
Projects, trust and enquiry capture.
View concept
B2B services
Expertise and a professional offer presentation.
View concept
Health
Calm communication and a simple path to a specialist.
View concept
Technology
Products and technical competence without clutter.
View concept
Premium
Minimal design that reinforces brand value.
View concept
Hospitality
Atmosphere, menu and booking path — strong on mobile.
View conceptDevSentinel projects
Own products and demonstration concepts. Client website case studies will appear here when they are ready to publish — we do not invent fake clients.
Recevio
AI virtual reception for service businessesA SaaS platform that automates enquiry handling from the website, Instagram and Facebook, helping collect leads, answer requests and book appointments — across service industries.
- AI chat, website widget and Instagram / Messenger integration
- Leads, enquiries, appointments and calendar integrations
- Business dashboard, follow-up and customer-service automation
Next.js · Gemini AI · Supabase · Stripe · Meta
BeautyBoost AI
AI reception 24/7 for beauty salonsA product specialised for the beauty industry: turns Instagram, Messenger and website messages into bookings. The AI assistant answers questions about services, prices and availability — even outside business hours.
BeautyBoost AI is an industry-specific version of the solution for the beauty sector, built on a shared core with Recevio.
- AI chat, website widget and Meta integration (Instagram, Messenger)
- Leads, bookings and calendars (Google, Outlook, ICS)
- Salon dashboard, follow-up and reactivation campaigns
Next.js · Gemini AI · Supabase · Stripe · Meta
KinderFlow
Platform for nurseries and kindergartensSaaS that connects management, teachers and parents in one place. MEN-compliant documentation, communication, finances, QR attendance and a substitute teacher marketplace — without scattered spreadsheets and paper.
- Facility dashboard, daily records and documentation aligned with Polish requirements
- Parent app, messaging and real-time notifications
- QR check-in/out, staff schedules and substitute marketplace
Next.js · Flutter · Node.js · PostgreSQL · PWA
Site in preparationkinderflow.pl
How a website is built
A process a business owner can follow — from understanding the offer to launch and further growth.
1
We learn the company
Offer, clients, goals and what the website should actually do.
2
We agree the scope
Page structure, functions, forms and what we will not do in this round.
3
Visual direction
How the brand is presented, matched to the offer and audience.
4
Content and materials
We organise the content, photos and materials you provide and fit them into the page structure.
5
Development
Building the site: layout, content, forms and the mobile version.
6
Testing
We check phones, behaviour, performance and correctness before launch.
7
Launch
Go-live, domain, final checks and handoff.
8
Growth
If the project needs it, we grow it with new pages, integrations, automation or features.
Why DevSentinel
DevSentinel designs and builds websites and applications with a clear goal, maintainable code and room to grow. Our own SaaS products shape business decisions, not only technical ones — from launch through sales and operations.
Cybersecurity experience is part of DevSentinel’s history and competence. It influences quality, architecture and technical responsibility on websites and apps. Separate audit, pentest and KSC/NIS2 services remain available where they are needed.
You work directly with DevSentinel — concrete contact about scope, priorities and next steps, at a scale suited to direct collaboration.
Product and growth
Own products shape business decisions, not only technical ones
Engineering discipline
Security and quality considered from the start, not added at the end
Delivery
From scope through launch to maintenance and further growth
Reviews and collaboration
What clients and colleagues say
“Krzysztof organised our deployments and system maintenance. Thanks to automation and better infrastructure configuration, the system runs stably and predictably. Cooperation was concrete and effective.”
Mariusz Klinkosz
Owner, Re-Druk (e-commerce)
“Professional approach, very good communication and smooth delivery. The project was implemented with care for stability and security.”
Katarzyna Niedźwiedzka
Respect Energy – energy
“I had the pleasure of working with Krzysztof at two companies. Each time he impressed with professionalism, commitment and a great approach to collaboration. He is a reliable and trustworthy specialist, focused on achieving goals.”
Alex Iwański
UMMO – sales
Source: LinkedIn
“Krzysztof quickly got into the project and started delivering real results. I value the engineering approach, clear communication and responsibility for the outcome. Cooperation without the unnecessary agency layer.”
Andrzej
NDAE-commerce (NDA)
Reviews are from clients and colleagues in e-commerce, energy and IT. Some projects under NDA.
When a website is no longer enough
A website presents the offer and collects contact. An application runs a process or function: dashboards, internal systems, MVPs and business tools.
Web applications, client panels and dashboards
Internal systems and dedicated tools for the company
MVPs and platforms grown after the first launch
Once the core product works, we can grow the processes around it
Automation, integrations and AI-supported solutions where they cut manual work — not as a marketing slogan.
Form → CRM → workflow
An enquiry from the site reaches the system, gets a status and continues without retyping data.
Connecting several systems
Data moves between tools you already use: payments, calendar, messaging, APIs.
Support for a concrete process
Classifying enquiries, working with documents or an assistant in support — only where it has a measurable effect.
Cybersecurity is part of DevSentinel’s competence
Security experience shapes how solutions are designed. Audits, pentests and KSC/NIS2 support remain a separate, full offer — we do not reduce them to “secure websites”.
National Cybersecurity System 2026 — Key and important entities, KSC Register, S46, ISMS, incidents and audits — a practical guide to new obligations.
NIS2 implementation support
Current-state assessment, gaps, documentation, risk management and incident processes — organising requirements for how the organisation actually works.
Cybersecurity & NIS2IT security audits
Review of infrastructure, applications, access and procedures with prioritised findings and a remediation plan.
IT security auditPenetration testing
Web application and API pentests: real attack paths, clear risk priorities and remediation support.
Penetration testingKnowledge base
Websites, applications, automation and cybersecurity in practice
🧭
Websites
How to Build a Website Step by Step – From Goals to Launch
A practical website-building process: goals, structure, content, design, development, SEO, analytics and launch.
2026-07-275 min
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Websites
Landing Page or Company Website – Which Should You Choose?
Landing page or a full company website? Compare use cases, structure, SEO, maintenance and room to grow.
2026-07-275 min
💻
Apps & automation
What building a web application looks like from idea to launch
A practical walkthrough of a web app project: discovery, MVP, architecture, development, testing, launch, and maintenance — with concrete stages and decisions.
2026-07-177 min
🛡️
KSC & NIS2
NIS2 in practice: where to start implementation in a company
A practical NIS2 and KSC amendment starting point: scope, gaps, control priorities and next steps — from day-to-day implementation work, without legal advice.
2026-07-176 min
Frequently asked questions
Questions that usually come up before commissioning a website
With a conversation about the company, offer and website goal. From that we pick the delivery level: landing page, company site, a larger search-engine-ready site, or a comprehensive site.
It depends on scope, materials and the number of pages. A simpler landing page is faster than a larger site. We agree a timeline after the scope is clear — no rigid “by yesterday” promises.
The number of unique views, the state of content, how custom the design is, forms, integrations, migration and language versions. Scope and pricing are agreed before work starts. We do not publish a fixed price list.
Yes. The project is built for your brand, offer and clients. We do not ship a ready-made template as “your website”.
Yes — layout, copy and forms are designed for mobile, because that is often where contact with the company starts.
Yes on the technical side: heading structure, metadata, sitemap, canonicals, schema.org where it makes sense, performance. That is SEO-ready preparation, not an SEO ranking service and not a promise of Google positions.
Yes. After launch you can add pages, a blog, integrations, or move to an application when accounts, dashboards or processes appear.
When the site should not only present the offer but run a function: login, dashboards, workflow, payments, an internal system. Then we build an application as a separate product.
The site is live, analytics and consent are configured as agreed, and further development is planned when there is a real need — not as a mandatory subscription.
Let's talk about your project
A few light details about the project and your contact — we will sort out the rest together. Applications, automation and cybersecurity belong here too.
Let's talk about your website
A landing page, company site or a larger information architecture — a short note about the goal is enough to propose a next step. Applications and cybersecurity are discussed here too.