Andreas Hahn

Senior Frontend Engineer, Keystone Security - GraphQL · CSS · TypeScript

Keystone Security

Zurich, Switzerland · CET (UTC+1)

6+ years experience

Sorbonne University

English, German, French

Co-founder

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Overview

Currently at Keystone Security, where I work on web frontends. Led the move of 263 screens to a shared React component library. Shipped 29 launches on the web team without a rollback. Most at home with React and CSS. Jazz piano, badly.

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Skills

GraphQLaccessibilityCSSweb performanceTypeScriptReactNext.js

Co-founderLooking for a co-founder

closes in 3 months

Looking for an operations co-founder for contract review for kirana stores

The idea: Looking for an operations co-founder for contract review for kirana stores
Stage: Early revenue
I bring: 9 years in web frontends
Looking for: Operator who has scaled a team
Commitment: Full-time now
Location: Zurich or remote

I bring 6 years of web frontends (currently Keystone Security). Ideally you've sold to enterprises. Pre-product, some customer interviews done.

Zurich, Switzerlandreactnext.jsaccessibility

Open

Experience

Senior Frontend Engineer
Mar 2023 - Present
Keystone Security · 3 yr 7 mo · Full-time · Zurich, Switzerland
- Led the migration of 68 services to TypeScript.
- Moved 62% of web traffic off a legacy monolith without a customer-facing incident.
Frontend Engineer
Oct 2020 - Mar 2023
L'Oréal · 2 yr 5 mo · Full-time · Zurich, Switzerland
- Wrote the CSS service that now handles 64 million requests a day.

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Education

Sorbonne University
Licence, Mathematics
2016 - 2019

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