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Bartosz User

@bartoszuser2

Lead Frontend Engineer at a global pharmaceutical company, delivering validated Angular systems and leading a five-engineer team.

Poland

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At a confidential global pharmaceutical company, I develop and maintain two enterprise Angular applications for regulated systems. I build data views, record-management forms, and interactive visualizations, and integrate them with GraphQL and REST APIs.

I lead delivery planning and technical direction for a five-engineer frontend team, coordinating releases and aligning solution design and code reviews across the applications. I also produce technical and validation documentation to support controlled releases and audit readiness.

At Planetarian Sp. z o.o., I lead delivery planning for a six-engineer team and develop websites and web applications with Angular. I also develop and maintain React Native applications for iOS and Android.

Earlier, I built and maintained Angular applications at Jinni Lotto, including a platform integrated with payment and game providers. I also worked on full-stack web applications at Synteco and resolved production defects and implemented client-side response caching as a consultant for CX Index.

Experience

Work history, roles, and key accomplishments

Current

Lead Frontend Engineer

Current

Confidential Global Pharmaceutical Company

May 2020 - Present (6 years 5 months)

Develop and maintain two enterprise Angular applications, implementing data aggregation views, record-management forms, and interactive visualizations. Lead delivery planning and technical direction for a five-engineer frontend team, and produce technical and validation documentation for regulated pharmaceutical systems.

Angular TypeScript RxJS NgRX Angular Signals GraphQL REST APIs Chart.Js Jest SCSS Git Docker Jira CodeBeamer Bitbucket Gitlab

Current

Technical Lead / Angular Developer

Current

Planetarian Sp. z o.o.

Oct 2018 - Present (8 years)

Lead delivery planning for a technical team of six engineers. Design, develop, and maintain websites and web applications using Angular, and develop React Native applications for iOS and Android.

Angular React Native REST RxJS NgRX TypeScript SCSS Git Gitlab Replit

Frontend Consultant

CX Index

Mar 2022 - May 2023 (1 year 2 months)

Diagnosed and resolved production defects in an Angular application. Designed and implemented an HTTP interceptor-based client-side response cache to reduce repeated calls to a high-latency backend.

Angular REST RxJS TypeScript SCSS Git Jira Gitlab Angular Interceptor Client Side Data Caching

Senior Frontend Developer

Jinni Lotto

Sep 2017 - Apr 2020 (2 years 7 months)

Built and maintained multiple applications, including a customer-facing gaming platform, an internal CRM, and an Android terminal application. Built an Angular platform integrated with payment and game providers.

Angular JavaScript jQuery CSS Smarty REST APIs WebView

Full-Stack Web Developer

Synteco

Jan 2014 - Aug 2017 (3 years 7 months)

Developed full-stack web applications including CRMs, e-commerce sites, recruitment platforms, newsletters, and landing pages using PHP/MVC, MySQL, JavaScript, jQuery, Smarty, Sass, PrestaShop, and WordPress.

PHP MySQL JavaScript jQuery Smarty SASS PrestaShop WordPress