
Jani Kowalski
Full-Stack Developer
Hi, I'm an expert in WP customization, custom fields & post types (ACF, Pods), and I'm experienced in API integrations, site migrations, multisite, LMS (eg. Learndash), marketplaces, and multilingual/multicurrency projects. I make WordPress sites excel in performance (Google Core Web Vitals).
5.0/5
overall rating
413
projects
45
customers
Location
la Pobla de Farnals, Spain
Languages
English, Polish
Member since
15 Oct, 2021
4 years
Typical projects
Customizations, Migrations, Plugin Development
I'm proud to be named among esteemed colleagues: https://www.codeable.io/blog/recognizing-exceptional-wordpress-experts-in-2023/ My experiences include: ------------------------------ Functionality customization - I'm an expert in WordPress/WooCommerce theme/plugin customization, including custom post types, fields (ACF and PODS frameworks), and WP blocks. I authored dozens of custom-made plugins. ------------------------------ Custom API integrations (incl. Shippo, InFlow, SureCart) ------------------------------ Complex site migrations: WordPress to WordPress and "other system" to WordPress ------------------------------ Performance optimization - I help WP Sites achieve a 90+ PageSpeed Insights mobile score and a GOOD rating in all Core Web Vitals metrics. I provide optimal configuration of the WP Rocket plugin or LiteSpeed Cache plugin. ------------------------------ Multisite installations ------------------------------ Learning Management Systems (Learndash LMS, Tutor LMS) ------------------------------ Marketplaces ------------------------------ Multilingual and multicurrency sites ------------------------------ Animations (JavaScript and CSS) ------------------------------ After 25+ years in business management in different industries, I returned to my original passion: designing and coding systems that support business and organizational processes. Usually, we achieve prompt and thorough mutual understanding with clients about their needs, and often, I can contribute to the client's overall vision of the project. Thank you for visiting Codeable and reading my profile. Let's get your project done together.
Skills
5/5
I had an exceptional experience working with Jani! His deep knowledge of WordPress was evident in every aspect of the audit he performed. Jani also consistently went above and beyond our initial audit scope and kept communication clear and frequent throughout the project. Even when we encountered issues outside the original plan, Jani handled them smoothly and stayed positive. Looking forward to continuing working with him in the future!
Jan 09, 2025
5/5
I can't imagine a better consultation. Jani understood our needs, was very easy to communicate with, gave complete answers and anticipated potential problems.
Dec 07, 2023
5/5
Total rockstar developer. Thank you!
Jun 30, 2022
5/5
Jani completed the project quickly. All activities were documented well and completed on or before the required deadlines. Jani kept me informed of status throughout and responded quickly to our very short punch list of final adjustments. We had an outstanding engagement on this project.
May 29, 2025
5/5
He is Professional, Patient, Responsive.
May 23, 2025
5/5
Jani was very clear explaining his results of his quick and thorough troubleshooting!
Apr 22, 2025
5/5
Jani did a fabulous job and I couldn't be happier with the result. Thank you Jani!
Feb 10, 2025
5/5
Great Job that no one else accomplished. I would like to add a few more details to this task- Please contact me by phone to discuss this new task
Dec 21, 2024
5/5
Super responsive and knowledgeable!
Sep 04, 2024
5/5
Jani is great and very thorough. Well done.
Jul 08, 2024