Josef Mazak
From: Czechia
Location: Praha, CZ
On Useme since 19 January 2026
About me
Senior engineer focused on Next.js applications, designing UI architectures and improving performance (Core Web Vitals). Experienced in TypeScript, design systems, testing, and CI/CD workflows. Comfortable leading features, mentoring developers, and collaborating closely with product/design.
CV / Résumé
May 2022 - Oct 2025
E-Banking Architect
Santander Consumer Bank
Directed technicians in preparing plan drawings or specification documents. Designed and implemented electronic banking applications, improving customer satisfaction.
May 2018 - Jan 2022
Team Leader
SIENN
Set specific goals for projects to measure progress and evaluate end results. Managed multiple projects, including CRM and ERP solutions, achieving improvement in operational processes. Designed system architectures and implemented solutions.
May 2017 - Jan 2018
Software Development Specialist
Travelplanet.pl
Developed custom algorithms in order to optimize the speed of data processing operations. Implemented travel insurance sales processes, streamlining operations and increasing revenue.
Oct 2016 - Feb 2017
Developer
Extradom.pl
Data import from MSSQL to Force.com cloud. Maintaining synchronization with cloud. Implementation of business logic using Force.com mechanisms. Implementation of user interfaces using Force.com mechanisms.
Feb 2015 - Sep 2016
Developer
Legimi.pl
Implementation from documentation. Estimating tasks. Testing and fixing. Optimizing solution performance.