Web development case studies

LIUPAG is my own SaaS, and it’s constantly evolving. It’s a lightweight admin panel and file manager for static, exported, AI-generated, PHP, and custom-coded sites. It turns a plain HTML site into a manageable product with a built-in WYSIWYG editor, code editor, and SEO analyzer - as if you had a modern CMS, but without its limitations. The key principle: all data is stored only on the client’s server, and I have no access to it.

• WYSIWYG page editor and code editor: HTML, CSS, JavaScript, XML, and even PHP
• File manager: create, delete, move, upload, and download files and folders
• Built-in image editor
• Real-time SEO analysis right in the editor - errors and warnings visible even in drafts
• sitemap.xml generator and full site analysis across key parameters
• Drafts, versioning, and a backup-and-restore system
• Data stored only on the client’s server - the panel is easy to install and remove
• Automatic updates of the interface and features with no manual work
• A fast React interface with async server communication, responsive on mobile
• Commercial licenses and White Label for agencies and developers

SAEK is a large, auto-updating company directory with built-in social interaction features. Users can improve their company profiles, add contact details, and influence ranking through a dynamic system based on activity points (Boost) over the last 30 days. Legal company data comes from open government sources - more than 10 update channels; refresh speed matches KRS extracts and CEIDG updates. The catalog holds more than 4 million companies.

• Directory of more than 4 million companies in Poland
• Auto-updating legal data from 10+ open government sources
• Refresh speed aligned with KRS extracts and CEIDG updates
• Users enrich and improve their company cards
• Adding and managing contact information
• Dynamic ranking based on Boost activity points over 30 days
• Social interaction features around contractor profiles

I built a CRM for step-by-step planning of the production process, accounting for the interdependencies between departments and product lines. The system is used for daily planning, control, and tracking of complex, multi-component manufacturing.

• Step-by-step planning that accounts for interdependencies between departments and product lines
• Daily planning, control, and production tracking
• Role-based access and a personal dashboard for every employee
• Recording each specialist’s work results
• Separate databases for tracking production processes and staff

A custom platform for full control over promotion: from daily monitoring of every page’s source code to task management and integration with rank-tracking systems.

• Full control over every page - daily change history of the source code
• Dynamic, per-page, in-depth SEO analysis
• Semantic core management
• Rank tracking and integration with external monitoring systems
• SEO task management: kanban, timeline, and other views
• Site control and analysis across more than 200 parameters
• Alerts about issues and errors
• Built-in AI assistant for writing tags, texts, and analyzing pages

A multifunctional application that combines several technologies for copy trading through the APIs of popular crypto exchanges, with access both from the web interface and via Telegram.

• Copy trading via the APIs of popular exchanges
• Instant order execution for all subscribers with no time lag
• API key encryption, hardened security, and data integrity control
• Telegram API integration - quick access through a bot and Mini App

An industry-specific CRM for a particular production facility: from automatic payroll calculation based on completed volumes to online orders from counterparties and summary analytics for management.

• Automatic payroll calculation for completed work volumes
• Tracking of produced and sold goods
• Warehouse accounting and product movement
• Automated generation and printing of accompanying product documents
• Tracking of employees, wages, and bonuses
• Online orders from counterparties with automated intake and fulfillment
• KPI and revenue analytics and summaries for management

Custom development of the store and programming of a CRM to track and process orders from both the store itself and offline points of sale. This is not WordPress with WooCommerce - the store is built on Drupal, and the CRM is a separate, fully custom development.

• Custom store development on Drupal
• A dedicated CRM for tracking and processing orders
• Unified order handling from the online store and offline points of sale
• Full control over functionality without the limits of off-the-shelf solutions

An implementation of a complex, non-standard idea: all content is stored on IPFS nodes and managed through a master smart contract. Interface gamification and interaction with multiple contracts to record data - true Web3 with no servers or hosting.

• All content stored on IPFS nodes
• Managed through a master smart contract
• Interaction with multiple contracts to record data
• Interface gamification and a non-standard UX
• True Web3 - no servers or hosting

A two-sided marketplace: providers register, customers create requests and choose a contractor, and an administrator oversees the whole process. All requests go only through the portal - provider contacts are revealed only after selection.

• Provider registration and request creation by customers
• Provider selection with full administrator oversight
• Built-in rating system, reviews, and mapping
• Personal provider profiles with a photo gallery and description
• Requests only through the portal, with no contact details published until selection

I join projects to strengthen teams and build the functional layer. I work as a remote team member: taking part in discussions, implementing complex third-party design solutions, and delivering both large modules and pinpoint micro-tasks.

• Joining a project to strengthen the team and build the functional layer
• Implementing complex third-party design solutions
• Participating in project discussions as a remote team member
• Integrating online payments with transaction and payment-gateway response logging
• Building a backend for a specific task or problem
• Coding the frontend from Figma designs

Beyond the large systems - many simpler projects: landing pages, company sites, online stores, catalogs, blogs, forums, and more.

• Landing pages and promo pages
• Corporate and company websites
• Online stores and catalogs
• Blogs, forums, and content platforms