Available to hire
I’m Jan, a Senior iOS Developer with 16+ years of experience building mobile solutions for clients worldwide. I’ve created everything from fintech apps handling millions of users (like Poland’s Żappka super app) to specialized tools for banking, IoT, and e-commerce. I’m passionate about clean architecture and secure implementations, and I’ve contributed to the iOS community through open-source projects like the Syncano iOS SDK. Whether you need a complete app from scratch or expertise to elevate your existing product, I bring both technical depth and a proven track record of delivering results.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
Polish
Fluent
English
Advanced
Work Experience
Senior iOS Developer at Lite e-Commerce Sp. z o.o. / GreenHive Sp. z o.o.
January 1, 2021 - PresentResponsible for creating new features and maintenance in fintech features for the Żappka app.
Senior iOS Developer (Contractor) at Droids on Roids
January 1, 2020 - January 1, 2021Worked on two iOS projects: an IoT app with image recognition features and a banking app.
Senior iOS Developer (Contractor) at Salesforce
January 1, 2018 - January 1, 2020Maintained and implemented new features in the mobile application for one of Salesforce’s cooperators.
Senior iOS Developer at Kourts
January 1, 2016 - January 1, 2018Led development of Kourts Player and Kourts Instructor apps to reorganize the way people book tennis courts around the world.
Senior IOS Engineer at Syncano
January 1, 2014 - January 1, 2016Creator of an open sourced iOS SDK to communicate with the Syncano platform. Worked on serverless backend integrations and modular app components.
iOS Engineer at RR Donnelley
January 1, 2009 - January 1, 2014Responsible for creating iOS applications for international clients. In RR Donnelley I was involved in the whole process of developing the product, from client contact through design process to implementation and maintenance.
Senior iOS Engineer at Syncano
January 1, 2009 - January 1, 2014Creator of an open-sourced iOS SDK to communicate with the Syncano platform. Syncano is a Serverless Platform providing backend as a service for mobile and web applications. Rapidly assemble building blocks for your app without a backend or server.
Owner / IOS Engineer at Appience
January 1, 2000 - PresentOwner and iOS engineer delivering iOS apps and consulting for clients. Led product ideation, architecture and implementation for iOS projects.
Education
Software Development at Warsaw School of Computer Science
January 1, 2005 - January 1, 2009Software Development at Warsaw School of Computer Science
January 1, 2005 - January 1, 2009Qualifications
Industry Experience
Software & Internet, Retail, Professional Services, Financial Services, Computers & Electronics
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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