Katharina Keller

S

iOS Engineer at Relay Care · IOS apps

Relay Care
Berlin, Germany · CET (UTC+1)
1+ years experience
University of Amsterdam
English, German
Open to work
Messaging unavailable

Overview

I work on iOS apps at Relay Care in Berlin. Brought on-call pages for iOS down from 16 a week to 2. Moved 88% of iOS traffic off a legacy monolith without a customer-facing incident. Most at home with Core Data and SwiftUI. Kannada theatre fan.

Good reasons to reach out
  • Roles in iOS apps
  • Questions about iOS apps
Please don't message about
  • Courses and coaching offers
  • Crypto token projects
  • Unpaid work or spec projects

Best reached early in the week

Skills
Core DataCombineXCTestSwiftUIUIKit
Open to workLooking for a role
closes in 3 months

Open to iOS Engineer roles at growth-stage developer tools companies

Target roles
IOS Engineer
Level
Mid
Industries
Consumer apps, Climate tech
Work mode
Remote
Available
Immediately
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

1 years in iOS apps. Strongest at Core Data and XCTest. Serving notice now.

Berlin, Germany · remote OKxctestuikitcore data
Open

Experience

  1. iOS Engineer
    Oct 2025 - Present
    Relay Care · 1 yr · Full-time · Berlin, Germany
    • Wrote the Combine service that now handles 53 million requests a day.
    • Took crash-free sessions from 96.7% to 99.7%.
    • Rebuilt onboarding in SwiftUI and lifted day-one retention 5%.

References

No references yet.

Education

  1. University of Amsterdam
    BSc, Electronics and Communication
    2022 - 2025

Details

Compensation expectations
What they are targeting for their next role.
Visible to connections
Direct contact details
Direct email and a scheduling link.
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