about me
Experience and specialization in web projects
I work as an experienced web developer with more than 15 years of experience in developing and implementing modern web solutions. From the very beginning of my career, I have combined my passion for programming with a professional approach to delivering projects for clients from various industries around the world.
My expertise includes developing websites, e-commerce platforms, and web applications using proven backend and front-end technologies. Implementation is performed reliably, in a timely manner, and in accordance with industry best practices.
I work with a set of technologies that I adapt to the needs of the project:
backend technologies and technical competencies
/ application Architecture
PHP 7/8+ – production applications, performance optimization, long-term maintenance
Symfony Framework -MVC architecture, sites, Events, queues, security
REST API design and implementation
authorization (tokens, OAuth) / error Handling, API Versioning / system Integrations-system
Backends for native applications (mobile / desktop)
API for mobile apps / real-time communication / support for a large number of requests
API integration and external systems
integration with third-party APIs
ERP / warehouse systems / production management systems / payment systems / e-commerce platforms
integration with AI / LLM
API OpenAI (GPT) – content generation, process automation / data processing, JSON, API pipelines / & AI integrations in production systems
integration with social media platforms
Facebook / Instagram API / publication automation and data synchronization / Marketing integrations
Streaming / Media
Backend for
streaming solutions integration with Wowza Streaming Engine / video streaming support / managing access and authorization
of PrestaShop e-commerce users
dedicated modules / configuring verification and sales logic / migrating versions (1.6 → 1.7 → 8.x → 9. X) / API integrations (ERP, couriers, payments) / optimizing performance and SQL queries / store optimization / deploying WCAG 2.1
WordPress /
integration of WooCommerce with external systems / expanding sales logic / b2b
Frontend Solutions /
JavaScript / jQuery / Node development tools.js
API communication support / dynamic
interface components HTML5 / CSS3 / SASS / SCSS
adaptive interfaces / Performance and UX
optimization MySQL databases and tools
/ MongoDB
data structure design / query optimization
Git
teamwork / development workflows / version control and code review
Why should
you cooperate with me?
- International experience -working with clients from different countries and cultures.
- Complete solutions -from requirements analysis to project implementation and maintenance.
- Attention to code quality -applying best programming practices.
- Communication and transparency -constant contact and clear implementation rules.
Facts and figures
Facts and figures
behind the experience
-
15 + years of experience in creating and developing web
-
projects 200 + completed projects (e-commerce, dedicated systems, integrations)
-
PrestaShop from version 1.4 to 9. x -modules, migrations, performance optimization
-
clients from Poland, EU and USA
-
continuous B2B cooperation with agencies and e-commerce companies

and PrestaShop database structure.

quick contact and specific technical solutions.
For more than 15 years, I have worked with clients from Poland, Europe and the USA, implementing projects for companies, agencies and institutions.
I have designed and developed software of various levels of complexity-from corporate sites to extensive web platforms.
Projects that I have implemented:
-
e-commerce systems and API integration – comprehensive Prestashop support (from version 1.4 to the latest releases), product catalog migration, and integration with external systems.
-
Corporate portals and Agile projects – Symfony backend, REST API, integration with external services.
-
Production applications and Management Systems – intranet applications and tools for supporting internal processes.
-
Streaming platforms and mobile apps -API backend with authorization, security, and distributed access.
-
Scalable web projects-optimization of server performance and security, workflow in git version control systems.
Cooperation
technology partnership
It works with companies, agencies, and startups to develop applications, e-commerce systems, and APIs.
I help with projects that require experience, stable architecture, and integration with external systems.

![[:en]eab0549449414f8090ea2cb47f078435_28_1600](https://i0.wp.com/balcerzak.it/wp-content/uploads/2019/05/eab0549449414f8090ea2cb47f078435_28_1600.jpg?resize=400%2C400&ssl=1)
![[:en]18cf138826fe4283ad657e30e9f58958_25_1600](https://i0.wp.com/balcerzak.it/wp-content/uploads/2019/05/18cf138826fe4283ad657e30e9f58958_25_1600.jpg?resize=400%2C400&ssl=1)
![[:en]35be752e70004ecd9199c9017a9f6e77_6_1600](https://i0.wp.com/balcerzak.it/wp-content/uploads/2019/05/35be752e70004ecd9199c9017a9f6e77_6_1600.jpg?resize=400%2C400&ssl=1)
![[:en]1222bc7255444b8b9da03bd4f63b13d0_22_1600](https://i0.wp.com/balcerzak.it/wp-content/uploads/2019/05/1222bc7255444b8b9da03bd4f63b13d0_22_1600.jpg?resize=400%2C400&ssl=1)
![[:en]28605d995ebd4cdea6602a8e49fec738_13_1600](https://i0.wp.com/balcerzak.it/wp-content/uploads/2019/05/28605d995ebd4cdea6602a8e49fec738_13_1600.jpg?resize=400%2C400&ssl=1)
![[:en]873734c3c4e140a7a38fb586185c18a8_24_1600](https://i0.wp.com/balcerzak.it/wp-content/uploads/2019/05/873734c3c4e140a7a38fb586185c18a8_24_1600.jpg?resize=400%2C400&ssl=1)
![[:en]Startup Stock Photos](https://i0.wp.com/balcerzak.it/wp-content/uploads/2019/05/f8b3b5ddd7fa49ff9c15bdd0a968b41f_4_1600.jpg?resize=400%2C400&ssl=1)
SQL query and cache optimization. Stable support for several thousand products.