About Me

#

Programming and Development

#

Data and Workflow Automation

#

Data Analysis and Visualization

#

System Support and Maintenance

#

Communication and Collaboration

Philico SA

Experience image: Fullstack Developer
Lausanne, Switzerland,
February 2025 - Present
Fullstack Developer
In my current role I work as the main full-stack developer on a production internal hours-tracking tool. I’m responsible for feature development, deployment, maintenance, and the ongoing migration of the system to a modern Google Cloud setup. I modernize legacy codebases, update libraries and infrastructure, and keep the tool stable for daily use. I work directly with stakeholders to turn operational needs into shipped features on both the frontend and backend. In parallel, I’m building the user-facing interface for an internal AI assistant (chat-style interface) and have hands-on experience delivering Python-based internal tools from concept to production.
Python
Pytest
Docker
Google Cloud
PostgreSQL
Django
ShadCN
TypeScript

CERN

Experience image: Fullstack Engineer
Meyrin, Geneva, Switzerland,
August 2021 - August 2024
Fullstack Engineer
RCS-SIS-TS
As a Fullstack Developer for the SCOAP3 repository project, my main role involves maintaining existing systems and developing new one, constructing data harvesting workflows using Python and Apache Airflow. I also contribute to the Django backend and the React frontend. This role offers an incredible opportunity to support an open access initiative that benefits the scientific community, making it both a professionally enriching and personally rewarding experience.
Python
Pytest
Apache Airflow
Docker
PostgreSQL
Django
OpenSearch
Next.js
AntDesign
JavaScript
Team Work

CERN

Experience image: Fullstack Engineer
Meyrin, Geneva, Switzerland,
April 2020 - August 2021
Fullstack Engineer
EP-CMG-CO
Contributing to the CMS Data Quality and monitoring systems has taught me how to effectively manage multiple projects at the same time and how to perform well as the only developer in a team. This role not only involved development and maintenance tasks but also provided support during online operations, where I had the critical role of the main detector on-call (DOC). This position enhanced my ability to communicate ideas clearly and collaborate effectively, further deepening my skills in a dynamic, operational environment.
Next.js
AntDesign
TypeScript
Python

CERN

Experience image: Intern
Meyrin, Geneva, Switzerland,
February 2020 - April 2020
Intern
EP-CMG-CO
My journey at CERN began as an intern, where I was tasked with creating and designing the user interface for the Data Quality and Monitoring GUI for the CMS experiment. This role allowed me to delve into the intricacies of user experience and interface design in a high-impact scientific environment.
Next.js
AntDesign
TypeScript
Python
Team Work

Dekbera

Experience image: Frontend Engineer
Vilnius, Lithuania,
January 2019 - May 2020
Frontend Engineer
At Dekbera, I had my first professional experience as a front-end developer, where I played a crucial role in developing applications for emergency services. One notable project was the ambulance forms application, designed to be used by emergency responders upon their arrival at a scene. This position was incredibly educational, and I greatly benefited from the guidance of a truly supportive and professional supervisor.
React
Redux
JavaScript
Jest
Team Work

Ernesta Petraityte © 2024