Alex Jeffcott
Senior Web Engineer at Shareup
Berlin, Germany
Summary
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SeniorAlex Jeffcott is a Senior Web Engineer based in Berlin with 8 years of experience building browser-centric SPAs and PWAs using modern stacks like Preact, Deno, Bun, TypeScript and esbuild. He currently helps Shareup deliver private, high-performance sharing via service workers, broadcast API, IndexedDB and websockets, focusing on smooth offline-first PWA experiences. Previously he owned high-traffic growth paths at AMBOSS—auth, paywalls, a Chrome extension and an analytics SDK—giving him strong product-minded frontend and testing chops. As a founder of Litem he took a legal-tech product from concept to acquisition, showing an ability to translate domain logic into reliable, production software. He pairs pragmatic engineering (CI/CD, e2e infra, testing) with a background in teaching and leadership, which surfaces in clear documentation and cross-team collaboration. Unexpectedly, his career blends deep browser-platform engineering with real-world product ownership and UX-savvy solutions.
8 years of coding experience
6 years of employment as a software developer
English, German, Italian
Stackoverflow
126reputation
18kreached
15answers
0questions
Github Skills (125)
deno10
javascript10
monorepo10
rust10
typescript10
package10
npm10
lerna10
minifier9
aws-ecr9
bundler9
google-container-registry9
facebook9
cloudflare-workers9
listener9
Programming languages (7)
Github contributions (5)
AlexJeffcott/adorn
Apr 2022 - May 2022
Performant and powerful keyword matching, extraction and annotation for the DOM
Contributions:65 commits, 47 PRs, 78 pushes in 1 month
keywordperformantextractionmatchingjavascript
AlexJeffcott/shuhari
Mar 2022 - Jul 2022
Contributions:13 reviews, 2 pushes, 1 branch in 4 months
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