Michael Zeltner, Developer in St. Gallen, Switzerland
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Michael Zeltner

Verified Expert  in Engineering

React Front-end Developer

St. Gallen, Switzerland

Toptal member since November 22, 2021

Bio

Michael has built front ends for Switzerland's top500 companies across the banking, automotive, real estate, insurance, and retail while working for the country's most prestigious full-service agency for four years. In addition to specializing in React front-end development, he has developed full-stack projects for renowned clients, such as the University of St. Gallen, ETH Zürich, and Helsana insurance. Michael's industry experience is backed by a bachelor's degree in business administration.

Portfolio

Namics (Now Merkle)
JavaScript, TypeScript, React, Angular, Tailwind CSS, GraphQL, Express.js...
Institute for Information Systems, University of St. Gallen (USG)
Angular, Firebase, WordPress, Bootstrap, CSS
Migros Klubschule
MacOS, iOS, Training, Mentorship & Coaching

Experience

  • CSS - 7 years
  • Node.js - 5 years
  • RxJS - 5 years
  • TypeScript - 5 years
  • React - 3 years
  • Storybook - 2 years
  • PWA - 2 years
  • Next.js - 2 years

Availability

Part-time

Preferred Environment

MacOS, Slack, Google Hangouts

The most amazing...

...project I've worked on was a progressive web app (PWA) that won several awards (including Master) in Best of Swiss Apps 2020.

Work Experience

Senior Front-end Engineer

2018 - 2021
Namics (Now Merkle)
  • Led the front-end development of a PWA that won several awards in Best of Swiss Apps 2020.
  • Earned a promotion to senior front-end engineer after only two years (instead of three to five years), despite being a career jumper.
  • Taught technologies to colleagues who had several more years of experience. Conducted a two-day seminar on web development for university students.
Technologies: JavaScript, TypeScript, React, Angular, Tailwind CSS, GraphQL, Express.js, Lerna, Emotion Library, Bootstrap, RxJS, Storybook, Progressive Web Applications (PWAs), CSS

Student Assistant

2017 - 2018
Institute for Information Systems, University of St. Gallen (USG)
  • Designed and built websites for private and corporate clients.
  • Developed a tool to manage internal processes using Angular.
  • Gathered business requirements, evaluated possible solutions, created quotes, and trained end users.
Technologies: Angular, Firebase, WordPress, Bootstrap, CSS

Course Instructor

2013 - 2018
Migros Klubschule
  • Created custom courses to teach clients how to use Apple hardware and software.
  • Taught numerous courses for up to 20 participants.
  • Provided individual support and consultation to course attendees.
Technologies: MacOS, iOS, Training, Mentorship & Coaching

Specialist

2012 - 2013
Apple
  • Trained and mentored new and current employees after two months in my role.
  • Improved service quality by autonomously developing a solution to fix an important process issue.
  • Interacted closely with Swiss mobile providers and owned responsibility for mobile contracts.
Technologies: Telecom Equipment & Solutions, Technology, Sales, Consulting, IT Consulting, Training, Mentorship & Coaching

Experience

myLivit

https://merkleinc.ch/en/references/mylivit-innovative-real-estate-app
A PWA built for Livit, one of Switzerland's biggest real estate companies, in 2020, which won several awards in Best of Swiss Apps 2020, competing against native applications.

While working for Namics (now Merkle), I had the pleasure of collaborating with a front-end architect in the lead developer role to complete the front end. After a few weeks on the project, the lead developer was pulled off the project, and I took full responsibility for the front end.

As in all other projects at Namics, I turned designs into code and answered questions regarding the front end from all involved, including the business, design, back-end, and client.

FutureMe

A mobile app I developed for Helsana insurance on behalf of the University of St. Gallen and ETH Zurich. The app allowed users to connect their loyalty cards from Switzerland's two biggest grocery stores (Migros and Coop) and analyze their future health using an interactive avatar. I gathered the business requirements, evaluated a technology stack, developed the app using React Native, and distributed it to all major app stores.

iLead

A playful assessment tool I built for a big federal institution in Germany to evaluate candidates for leadership roles. This was a full-stack project for a private client. The application had to be functional without an internet connection and allow peer-to-peer communication using WebRTC. I gathered the business requirements, evaluated a technology stack, and developed the application using Angular in combination to build a robust desktop app.

Allergy Scan

A hybrid application that allowed users to scan any grocery item and check whether they and/or others were allergic to it. I developed the application for the AutoID Labs at ETH Zurich as a bachelor's degree thesis. My work included gathering the business requirements, evaluating a technology stack, building the app using Ionic and Angular, and distributing it to all major app stores.

dercampus

dercampus was an eLearning platform that operated at the University of St. Gallen to provide the knowledge from university classes in well-animated videos and interactive exercises. I built the first version with WordPress, migrated it to Angular, and finally built it with React. This was my first startup, and it's been discontinued for now.

Education

2013 - 2018

Bachelor's Degree in Business Administration

University of St. Gallen HSG - St. Gallen, Switzerland

Skills

Libraries/APIs

React, Emotion Library, Node.js, RxJS, WebRTC, jQuery

Tools

Lerna, Slack, Google Hangouts, Webpack

Languages

TypeScript, HTML, CSS, GraphQL, JavaScript, Python

Frameworks

Next.js, Angular, Ionic, Jest, React Native, Tailwind CSS, Cypress, Express.js, Bootstrap, Electron, Ionic 3

Paradigms

Responsive Web Design (RWD), Offline-first Development

Platforms

MacOS, Firebase, WordPress, iOS

Storage

MongoDB

Other

Storybook, Responsive Web Apps, PWA, Training, Finance, Economics, Mathematics, Interdisciplinary Collaboration, Business Requirements, Communication, Web Security, Progressive Web Applications (PWAs), Telecom Equipment & Solutions, Technology, Sales, Consulting, IT Consulting, Mentorship & Coaching

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