Web pages ERP CRM VoIP SMS Solutions
Implementing complex IT projects: websites, business systems, microservices, client portals, and communications platforms.
ERP
Business
CRM
Systems
VoIP
Business
SMS
Systems
Why in4system?
Good Quality
Transparent scope, clear cost breakdowns, and reliable delivery.
Individual
Solutions shaped around your needs instead of forcing one template.
Responsibility
We take ownership of the software we build and support.
Creative IT solutions
Who we are
We are a software house specializing in digital solutions that help businesses streamline operations, improve online presence, and scale effectively. From ERP and CRM to web design, SEO, microservices, IT support, server administration, and VoIP solutions, we provide tailored technology to drive your success.
+14
Years of running the business
+105
Completed projects
+55
Heart beat
Message from CEO
Technology should make business calmer, clearer and easier to run.
When we build software, we do not start with code. We start with the real workflow: who uses the system, what blocks the team, where time is lost, and what must be reliable every day. A good website, CRM, ERP, client portal or telecom platform should remove friction and give people confidence that the process is under control.
At in4system we combine practical engineering with long-term responsibility. We prefer clear scope, honest technical decisions, and systems that can grow with the company.
Artur Januszczyk
CEO, in4system
Our Services
Web apps, CRM & ERP, AI, e-commerce, SaaS, telecom and SEO
We design, build and support practical digital products for websites, business systems, automation, commerce and communications.
Websites & Web Apps
Custom websites, portals and web applications built for speed, clarity, security and long-term maintenance.
Web design, development and custom applications
Learn moreCRM & ERP Systems
CRM and ERP workflows that connect customers, products, services, invoices, tasks and daily operations in one practical system.
Business workflows, clients, invoices and operations
Learn moreAI Solutions
AI tools and automations that reduce manual work, support teams, generate content, and connect with real business processes.
Automation, assistants and creative AI workflows
Learn moreE-commerce & Shops
Online shops and e-commerce systems with clean purchasing flows, payment integrations and practical admin workflows.
Online stores and buying workflows
Learn moreSaaS Platforms
Digital platforms, client portals, billing, accounts, dashboards and business workflows that scale.
Software as a service and client portals
Learn moreVoIP, SMS & Telecom
Communication platforms, integrations, routing, messaging, support and secure telecom automation.
SIP, SMPP, HTTP messaging and telecom systems
Learn moreSEO & Growth
SEO and growth work that helps your website become easier to find, understand and turn into real inquiries.
Search visibility, content structure and conversion growth
Learn moreLatest work
Case studies
Check some of our works and find solutions close to what you need.
Creating a Doom Metal Music Video with AI for Band Solitary
AI video generation and technical execution for a creative music project.
SEO for Child Psychologist Olsztyn
Improving local visibility through focused SEO strategy and content structure.
Florasenti - A Digital Home for the Essence of Life
Website design and content structure for a holistic wellness and aromatherapy brand.
From our blog
Latest Articles
Client portals / 6 min read
How a client portal reduces support work
A practical look at what a client portal should include when customers need products, invoices, documents and service status in one place.
FAQ
Questions clients ask before starting an IT project
Short answers about scope, technology, pricing, support, and how we work.
Yes. We build public pages, admin panels, and client portals with custom UI, full CSS customization, and professional interface patterns shaped around the workflow. When it fits the project, we can use MUI for operational areas, but every interface can be fully tailored.
We choose the stack around the product and business goal. Our work can include Next.js, React, PHP Laravel, Golang, Python, REST APIs, MySQL, integrations, automation, and custom frontend styling.
We estimate from scope, workflows, integrations, content, data migration, roles, security needs, and support expectations. The contact page includes a quick starting estimate, but final pricing needs a short discovery step.
Yes. We can modernize existing websites, connect APIs, migrate selected data, improve SEO structure, or build new modules around systems that already work.
Yes. We can support fixes, monitoring, improvements, security updates, content changes, and new feature development after release.