Core Data Experts in Germany
for reliable Apple platform apps, matched in minutes with vetted available freelancersHire experts who design persistent data models, optimize SQLite-backed stores and handle CloudKit synchronization for iOS, macOS and watchOS products, with fast, precise matching to vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used Core Data
Natascha F.
Last position:
Senior iOS Developer - ANÜ at Stadtwerke München GmbH
- Development of an iOS app that combines public transport and sharing services
- Collaboration according to Scrum in a large cross-functional team
- Creation of reusable components with SwiftUI and Combine
- Development of a custom solution for Apple Maps
José J.
Last position:
Freelance iOS Developer at Freelancer
PAYBACK GmbH: PAYBACK app - a loyalty bonus program and customer card that allows users to collect points.
Enhanced the application's architecture by restructuring and modularizing it.
Refactored and improved complex features using SwiftUI and The Composable Architecture.
Maintaining, bug fixing, optimizing, troubleshooting, and continuously improving the app.
Facilitating and planning the onboarding of new developers and providing mentorship.
Assistance in the hiring process, including evaluation, interviews, and strategic planning.
Porsche Digital GmbH: Development of the Porsche Road Trip app that allows users to comfortably plan and navigate through spontaneous drives and individual road trips along curated premium routes.
KI Labs: Development of a MVP for a large automotive company.
Snapp Mobile Germany GmbH: Equitel Banking - Consumer digital banking app for Equity bank, one of the largest banks in Sub-Saharan Africa.
comdirect Mobox - Banking app to manage current, savings and credit card accounts for teenagers. Addressed technicalities of implementing playful UI with customizable options and various offline features.
Deutsche Bahn AG - Development of a prototype for the next generation of companion app for train travellers.
optile GmbH: KPI Dashboard - KPI tracking of online payments for merchants that use optile's online payment solutions.
Every Interaction: Watchy - Composer of Apple Watch screenshots, which allows users to export the composed image and share it.
Cihan B.
Last position:
Senior iOS developer at Dewango GmbH
Developed an app for automatic safety checkins with heavily relying on AI-Tools:
Real-time Safety Monitoring - Continuous activity tracking using device motion sensors with automatic status verification through Firebase-based safety pings Emergency Contact System - Share code-based contact invitation system allowing trusted users to monitor real-time status with battery levels and last activity Background Processing - Robust Android foreground services and WorkManager integration ensuring 24/7 monitoring without interruption Smart Notifications - Firebase Cloud Messaging for instant alerts to emergency contacts Sleep Scheduling - Configurable quiet hours to prevent unnecessary alerts Premium Tier - In-app purchase system with unlimited contacts
Calin C.
Last position:
Gorillas
- Successfully migrated 99.9% of the users to the new app by automatically logging them in using the token retrieved from the old app.
- Facilitated more than 400k signups in the first 3 months after releasing the redesigned app by supporting phone, Apple, Google, and Facebook authentication methods implemented using Firebase.
- Helped more than 250k users successfully add their address by supporting search using Google Places and by selecting the exact location using Google Maps based on the service delivery zones.
- Skills: Firebase Auth, Google Places, Google Maps, Segment, Adjust, Braze, Rich Push Notifications
Mohammad A.
Last position:
ParkProReakt at Justus Liebig University Giessen
- proactive instead of reactive symptom detection in Parkinson patients
- iOS development
- FHIR integration
- database structure
Anton K.
Last position:
Senior iOS Engineer at HelloFresh SE
- Spearheaded development of the Experimentation Library, starting from writing RFC towards integration and support of the feature teams
- Spiked the possibility of using Kotlin Multiplatform for Experimentation Library to share implementation with Android
- Designed, developed, and iteratively integrated a new Data Layer, which unblocked and improved the development speed of the feature teams
- Organized workshop about Swift Concurrency to improve knowledge amongst iOS engineers and became a go-to person for related questions
- Completed overhaul of the existing CI configuration to make it more maintainable by big team
- Incorporated Bash script linter to harden CI and Utils scripts for iOS project
- Spiked Tuist as an option to integrate modularized features with 500+
- Maintained tooling to identify UI Tests ownership with custom Swift CLI and native SwiftLint rule
- Provided support to other teams on uncommon architecture questions
- Actively participated in shaping development culture within the team and across the whole iOS chapter
- Used technologies: Swift, SwiftUI, Swift Concurrency, Swift Package Manager, Bash, Git, GitHub Actions, Bitrise
Fatih K.
Last position:
Mobile App Developer at ING Belgium
- Part of a squad focused on intensive module development and integration
- Close collaboration with other squads and teams to integrate modules and essential components
- Use of SwiftUI and the Coordinator pattern to develop clean and understandable code
- Creative collaboration with UX designers in Figma and implementation in code
- Industry: Banking
- Project language: English
- Organizational form: Kanban
- Tools: Azure, Confluence, Figma, Teams
- Team size: 40 people
- Version control: Git, GitFlow, Azure
- App Store product: ING Banking
- Programming languages: SwiftUI, Swift
- Patterns: Coordinator, MVVM
- Swift Package Manager
- Localization: Yes
- Testing: XCTest, XCUITest
Michael B.
Last position:
iOS SDK Developer at Scoolio
- Developed an iOS SDK to display content in third-party iOS apps (supporting both SwiftUI and UIKit)
- Provided technical support to developers integrating the SDK into their applications
Discover over 15,000 top freelancers
Statistics of experts using Core Data
Aggregated from the professional profiles of matched freelancers.
Experience
16 years
Position duration
2.9 years
Positions per freelancer
9
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Healthcare, Media and Entertainment
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
86%
Master's degree or higher
57%
Doctorate
14%
Certifications per freelancer
2
Most common languages
German, English, Turkish
Speak two or more languages
88%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Germany using Core Data
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Core Data experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (100%)
- Healthcare (50%)
- Media and Entertainment (50%)
- Banking and Finance (38%)
- Transportation (38%)
- Automotive (25%)
- Education (25%)
- Food and Beverage (25%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Core Data does
Core Data is Apple’s framework for managing an app’s model layer and persistent object graph. It can store, fetch, validate and update structured data while tracking relationships and changes. Although it often uses SQLite as its persistent store, Core Data is more than a database wrapper: it also manages object lifecycles, faulting and change notifications.
Apps and data flows
Companies use Core Data when Apple platform products must work with local data, support offline use or handle complex relationships between records. Typical deliverables include:
- Persistent models for iPhone, iPad, Mac and Apple Watch apps
- Migration plans for changing schemas without losing user data
- Fetching, sorting and filtering for large local data sets
- Offline-first workflows with reliable synchronization
Ecosystem and tooling
Core Data works closely with Swift, SwiftUI, UIKit and the Apple SDKs. Strong specialists understand managed object contexts, persistent containers, fetch requests, predicates and concurrency. They may also connect Core Data with CloudKit through NSPersistentCloudKitContainer, use SQLite inspection tools and integrate networking layers that exchange Codable or JSON data.
When companies need expertise
Freelance expertise is useful when a new app needs a durable local model, an existing schema requires migration or slow screens reveal inefficient fetches. It is also valuable when teams are replacing an older persistence approach, introducing CloudKit synchronization or stabilizing data access across background tasks. In Germany, remote collaboration is common, while some regulated or product-focused teams prefer regular on-site sessions.
What strong specialists deliver
The best professionals begin with the domain model and data ownership rules, not with framework configuration. They separate contexts correctly, prevent UI work from blocking the main thread and make save, merge and error paths observable. They test migrations, conflict handling and termination scenarios, then document decisions so the model remains maintainable as the product evolves.
Choosing the right fit
Look for evidence of shipped Apple platform products with non-trivial relationships, offline behavior or synchronized stores. Ask how the specialist approaches lightweight and heavyweight migrations, background contexts, batch operations and CloudKit conflicts. For teams in Germany, clear English or German communication, dependable remote routines and the ability to work with existing Swift code may matter as much as Core Data knowledge.
Frequently asked questions
Not sure where to start with Core Data? These answers cover the essentials.
Core Data is used to model, store and manage structured objects in apps for iPhone, iPad, Mac and Apple Watch. It supports relationships, validation, change tracking, fetching and offline access, often with SQLite providing the underlying store.
Core Data is a mature Apple framework with detailed control over contexts, migrations, fetches and persistent stores. SwiftData offers a newer Swift-focused interface, while Realm uses its own persistence model; the right choice depends on deployment targets, existing code, synchronization needs and the team’s preferred level of control.
A strong Core Data specialist should also understand Swift, SwiftUI or UIKit, concurrency, SQLite concepts, testing and app lifecycle behavior. CloudKit, networking, Codable and data migration experience are especially useful when local data must synchronize with a remote service.
The required depth depends on the data model and failure risks. A simple local store may need focused framework knowledge, while complex relationships, legacy migrations, background processing or CloudKit conflicts call for a professional who has handled those situations in shipped products.
Yes. Core Data work is well suited to remote collaboration through repository access, architecture sessions, code reviews and reproducible test data. Teams should agree on documentation, review routines, working hours and whether communication is expected in German, English or both.
Core Data may be unnecessary for a very small app with simple preferences or for a product whose authoritative data always lives on a remote backend. It can also be the wrong choice when a team needs a persistence model that is shared across non-Apple platforms or already relies on a different storage layer.
Ask the Core Data professional to explain a real model, migration strategy and concurrency design without revealing confidential details. Good answers cover context ownership, merge behavior, fetch performance, error handling, testing and how data loss is prevented during upgrades.
Before starting Core Data work, clarify the supported Apple platforms, minimum operating system versions, existing model history and synchronization requirements. Review how the app handles background saves, migrations, test fixtures and production diagnostics so the scope includes reliability work rather than only model changes.
The average hourly rate of freelancers in Germany who have used Core Data in their recent projects is 88 €, which corresponds to a daily rate of about 707 € based on an 8-hour working day.
Of the freelancers in Germany who have used Core Data in their recent projects, 86% hold at least a Bachelor's degree, 57% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Germany who have used Core Data in their recent projects have 16 years of professional experience, with a single engagement typically lasting around 2.9 years.
The most common languages among freelancers in Germany who have used Core Data in their recent projects are German (88%), English (88%), and Turkish (25%).
The most common industries among freelancers in Germany who have used Core Data in their recent projects are Information Technology (100%), Healthcare (50%), and Media and Entertainment (50%).
The most common business areas among freelancers in Germany who have used Core Data in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (75%).
Main locations of FRATCH Experts, who have recently used Core Data
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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