Stefanie Erne

Stefanie Erne

I believe in creating web apps that are effortless to use, a joy to maintain, and make lives easier.

Full-stack developer with 10+ years of experience and a passion for front-end.

Experience

Senior Software Engineer

nxt Engineering GmbH
May 2022 - current
Zürich, Switzerland
  • Agile Software Engineering: Designed and delivered high-quality, custom web applications in an agile team across a diverse client portfolio using modern DevOps practices.
  • Scalable Platform Engineering: Developed a scalable architecture for a booking platform for a Zurich train travel startup using Angular and .NET Core, leveraging Terraform to manage the Azure infrastructure.
  • Cloud Transformation & Modernization: Supported the functional evolution and migration of a major insurance platform to a cloud-native Azure environment, modernizing a legacy Angular and Java stack.
  • System Re-engineering: Led the modernization of internal booking tools by re-implementing core features with Angular, GraphQL, and PostgreSQL, directly supporting the client's rapid scaling and operational growth.

Senior Front-End Developer

Sunrise Communications AG
Jan. 2020 - Sep. 2021
Zürich, Switzerland
  • Designed and prototyped next-generation cloud-based serverless web application using Angular and AWS Lambda to integrate with leading CMS.
  • Developed and optimized the AngularJS yallo, Lebara, and Swype websites, online shop, and mobile application.
  • Optimized the user experience and conversion rate using A/B testing and rapid feedback cycles.
  • Delivered the new white-label web app to scan an ID or passport as proof of identification.

Software Development Engineer

Findmypast Ltd
Feb. 2018 - Sept. 2019
London, United Kingdom
  • Migrated substantial parts of the .NET monolith to dedicated JavaScript (React), NodeJS and Elixir (micro-)services
  • Implemented A/B experiments around subscription and payments UI
  • Maintained and supported various Elixir, NodeJs, React and .NET services, mainly in the payment area, including integrations with WorldPay and PayPal

Senior Application Engineer

Swiss Re Management Ltd
Aug. 2012 - Nov. 2017
Zürich, Switzerland
  • Developed and maintained a web application which simplifies reporting financial data to the Swiss regulator FINMA. The reporting process could be reduced from eight to two weeks.
  • Responsible for the maintenance and integration of the system reporting Solvency II data to various European regulators. The systems include an in-house developed solution as well as a third-party solution. Tasks include integrating new updates provided by the vendor, administrating a Suse linux server, as well as providing bug fixes and new features.

Software Development Trainee

Swiss Re Ltd
Aug. 2008 - July 2012
Zürich, Switzerland
  • As a member of the Solution Quality Assurance team, I was part of several code reviews on other projects.
  • Implemented a web application to calculate Key Performance Indicators (KPI) based on project data.
  • Developed and executed tests to compare performance of various web services such as SOAP, remote EJB and REST.

Skills

Software Engineering

TypeScript JavaScript C# Java SQL

Web

Angular React GraphQL Gatsby Webpack HTML CSS

Cloud / Plattform

Azure Docker Terraform/OpenTofu GitLab Pipelines GitHub Actions Kubernetes AWS Lambda

Tools & Methods

Git PostgreSQL MSSQL Scrum Pair Programming Agile

Languages

English (fluent) German (native) French (basic)

Conference Talks

Speaker

.NET Day Switzerland 2025
Aug. 2025
Zurich, Switzerland
  • Tickets to Ride: Conquering Booking Chaos with Resilient .NET Architecture: Shared design patterns and lessons learned from building a scalable booking platform

Education

Bachelor of Science ZFH in Computer Science

ZHAW (Zurich University of Applied Sciences)
Sept. 2013 - July 2017
Winterthur, Switzerland
  • Bachelor Thesis: "Collection, Analysis, and Visualization of Smartphone-Metadata"

Federal VET Diploma in Information Technology ("Informatikerin EFZ")

BZZ (Berufsbildungszentrum Zürichsee)
Aug. 2008 - July 2012
Horgen, Switzerland
  • Completed the practical part of the education at Swiss Re Ltd.
  • Graduated as best student of the year in the Canton of Zürich, which was awarded a scholarship for ZHAW (Züricher Hochschule der Angewandten Wissenschaften)

High-school diploma

Conemaugh Township High School
Aug. 2007 - June 2008
Davidsville, PA, USA
  • Attended the senior year of high school as an exchange student

Bezirksschulabschluss

Kreisschule Mutschellen
Aug. 2003 - June 2007
Berikon, AG, Switzerland
  • Attended the Bezirksschule Mutschellen

Side Projects

SkillfullyTangled

WooCommerce Shop & Blog
https://skillfullytangled.com

Online shop where I sell my own hand-dyed yarn and publish knitting patterns.

Agile Trello

Chrome Plugin

Chrome plugin which adds agile functionality to Trello boards and cards.