Celina Wierzbicka

Senior Frontend Engineer

From: Wrocław, Poland

Experienced Senior Frontend Engineer with 5+ years of hands-on experience building web applications using cutting-edge technologies like React, Next.js, and TypeScript. Focusing on high-quality code, I specialize in creating user-friendly interfaces and implementing responsive designs that contribute to business growth. Through continuous learning and improvement, I deliver outstanding results. Staying current with the latest in frontend and tooling, I use AI-powered tools such as Cursor and Claude Code to improve quality and efficiency.

Skills

Work experience

Senior Frontend Engineer

Ground Truth Labs

October 2024 - January 2026

  • Delivering features end-to-end, from UI/UX design to production, for a data-intensive web platform for clinical trials.
  • Initiating and driving the build of the backoffice application—a self-service admin tool for managing the platform and handling internal requests—freeing developers from manually running scripts and responding to ad-hoc team requests.
  • Refactoring codebase to enhance performance, reduce complexity, and improve maintainability.
  • Contributing to the development of a design system, ensuring a consistent and user-friendly interface across the platform.
  • Helping to define best practices, coding standards, and internal documentation to improve team efficiency and onboarding.

Senior Frontend Engineer & Tech Lead

Swapcard

October 2020 - September 2024

  • Leading frontend work within the squad, contributing to the development of Swapcard's cutting-edge event platform.
  • Actively participating in the decision-making process for new features, bringing technical expertise to the forefront.
  • Maintaining code quality through code reviews.
  • Managing a team of 3 developers, providing guidance and support.
  • Collaborating with cross-functional teams to develop key features for Swapcard’s virtual and hybrid event platform.
  • Working within frontend chapter to improve developer experience (DX) and minimize technical debt.
  • Participating in hiring processes and mentoring new joiners.

Frontend Engineer (volunteer)

CodersCrew (non-profit organization)

July 2020 - February 2023

  • Volunteering in a non-profit organization that provides free IT education.
  • Developing a PE progress-tracking application for teachers and children.
  • Contributing to "CodersCard", a tool for devs to generate personal portfolio.

Frontend Engineer

SoftwareSupp

July 2020 - September 2020

  • Developing a marketplace web application using React and Redux.
  • Delivering new features, resolving bugs, and maintaining code quality.
  • Collaborating closely with UX designers.

Junior Frontend Engineer (Intern)

WebTower

January 2020 - June 2020

  • Developing e-commerce web applications using Vue.js and Tailwind CSS.
  • Preparing mockups and prototypes for new features and fixing bugs.
Technologies:

Co-founder & researcher

SureCapture Technologies

October 2017 - June 2019

  • Commercialization of research results on Molecularly Imprinted Polymers.
  • Securing the initial funding for the startup.

Education

Postdoctoral Researcher

Malmö University

October 2017 - September 2018

Postdoctoral Researcher at the Department of Biomedical Science, Malmö University.

Biomedical Science

Malmö University

October 2012 - April 2017

PhD degree. New fractionation tools for post-translational modifications.

Medicinal Chemistry

Wrocław University of Science and Technology

October 2011 - July 2012

Master degree. Development of new catalysts for olefin metathesis.

Chemical Engineering

Wrocław University of Science and Technology

October 2007 - July 2011

Bachelor's degree. Specialization in organic chemistry.

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