Jan Winkler

Senior iOS Engineer, BlaBlaCar - Core Data · Swift · UIKit

BlaBlaCar

Munich, Germany · CET (UTC+1)

5+ years experience

Humboldt University of Berlin

English, German

Open to work

Messaging unavailable

Overview

5 years in software engineering, the last 4 at BlaBlaCar, where I work on the iOS team. Rebuilt onboarding in SwiftUI and lifted day-one retention 4%. Cut p99 latency on the iOS services from 535ms to 83ms. Marathoner (5 so far).

Good reasons to reach out

Roles in iOS apps
Working sessions on UIKit

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SEO and link-building offers
Unpaid work or spec projects
Generic networking requests

Prefers short, specific messages

Skills

UIKitXCTestSwiftCore DataSwiftUI

Open to workLooking for a role

closes in 3 months

Staff iOS Engineer roles in e-commerce - Munich or remote

Target roles: Staff iOS Engineer
Level: Staff / Principal
Industries: Healthtech, Logistics
Work mode: Remote
Available: 30 days notice
Work authorization: Authorized to work in Germany
What I'm looking for: Scope to lead iOS apps work, with a manager who gives direct feedback.
Not interested in: Pure people management

5 years in iOS apps. Strongest at XCTest and UIKit. Can start in about six weeks.

Munich, Germanyuikitcore dataswift

Open

Experience

Senior iOS Engineer
Mar 2023 - Present
BlaBlaCar · 3 yr 7 mo · Full-time · Munich, Germany
- Shipped 7 launches on the iOS team without a rollback.
- Led the migration of 68 services to UIKit.
- Rebuilt onboarding in SwiftUI and lifted day-one retention 3%.
iOS Engineer
Oct 2021 - Mar 2023
Klarna · 1 yr 5 mo · Full-time · Munich, Germany
- Shipped a rewrite that took build times from 34 minutes to under 5.

References

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Education

Humboldt University of Berlin
BA, Information Technology
2017 - 2020

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