Core Data Experts in Germany
to build reliable Apple data layers with fast, precise AI matchingHire experts who design persistent storage for Apple apps, migrate SQLite-backed models, and integrate Core Data with Swift, SwiftUI and CloudKit. FRATCH matches you quickly with vetted, available freelancers who fit your technical needs.
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 in Scrum within a large cross-functional team
- Creation of reusable components with SwiftUI and Combine
- Development of custom solutions 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 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge 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 19 Sep 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
Apple persistence layer
Core Data is Apple’s framework for managing an object graph and persisting application data across iOS, macOS, watchOS and tvOS. It handles model definitions, relationships, change tracking, validation, faulting and storage without forcing every feature to manage raw database operations. Although commonly associated with SQLite, Core Data is an object persistence framework rather than a database itself.
Models and storage
A Core Data project begins with a managed object model that defines entities, attributes, relationships and constraints. Experts configure the persistent container, managed object contexts and fetch requests, then choose suitable stores for the application’s needs. They also plan thread confinement, background imports, batching and lightweight migrations so data remains reliable as the product evolves.
Apple ecosystem
Core Data works closely with Swift and Objective-C, and it can feed UIKit, AppKit and SwiftUI interfaces. Strong specialists understand NSManagedObject, NSPersistentContainer, fetched results controllers, predicates and sort descriptors, as well as CloudKit through NSPersistentCloudKitContainer. They may also connect it with Combine, async and await, unit tests, Instruments and Xcode’s data model tools.
Typical delivery work
- Design entities, relationships and validation rules for a new Apple application
- Refactor context usage and move expensive imports away from the main thread
- Plan model changes, migrations and recovery for released applications
- Improve fetch performance, memory use and large-data handling
- Synchronize local stores with CloudKit while handling conflicts
For products used in German retail, mobility, healthcare or industrial settings, local persistence can support offline workflows and resilient field applications. Specialists can collaborate remotely or on site with product, design and platform teams across Germany.
When expertise matters
Companies often bring in freelance Core Data expertise when an app has slow launches, missing records, merge conflicts or migration failures. It is also valuable when replacing an older persistence approach, adding offline support, introducing CloudKit sync or preparing a large existing app for SwiftUI. A focused specialist can review the model, reproduce data issues and leave behind tested implementation guidance.
Signs of quality
A strong professional treats the model as part of the product design, not only as storage configuration. They explain context ownership and queue rules clearly, test migrations against realistic stores and measure fetches with representative data. They distinguish transient, in-memory and persistent state, handle failure paths, and document recovery and synchronization behavior. Experience with Swift concurrency, CloudKit and Apple release workflows is especially useful when the app must remain dependable after updates.
Frequently asked questions
Not sure where to start with Core Data? These answers cover the essentials.
Core Data stores and manages structured application data on Apple platforms. It is useful for offline access, related objects, validation, change tracking, search and synchronization through CloudKit.
Core Data provides an Apple-integrated object graph, context management, migration support and optional SQLite-backed persistence. SQLite offers direct relational control, while Realm uses its own object database model; the right choice depends on query needs, portability and the application’s existing stack.
Core Data work benefits from strong Swift or Objective-C knowledge, Apple concurrency patterns and testing practice. CloudKit, SwiftUI, Combine, SQLite concepts, Instruments and Xcode data model tooling are also relevant for many projects.
Core Data expertise should match the risk of the data layer rather than a fixed time requirement. A simple local store may need focused implementation support, while migrations, CloudKit synchronization, legacy models or large datasets call for a professional who has handled those failure modes before.
Core Data projects are often suitable for remote collaboration because models, tests and migration fixtures can be reviewed in shared repositories. For teams in Germany, clear written communication in English or German, agreed review windows and access to representative stores help prevent misunderstandings.
Core Data support is useful when an app suffers from slow fetches, crashes during background work, inconsistent contexts or failed migrations. A freelancer can audit the model, isolate the cause, improve the implementation and document a safer path for future releases.
Core Data quality shows in tested migrations, predictable context boundaries and measured behavior with realistic data volumes. Ask the specialist to explain merge policies, error handling, background work, persistent history and how the implementation behaves after an interrupted update.
Core Data abstracts much of the storage layer, but database knowledge remains important. Understanding indexing, relationships, SQLite behavior, transactions and query costs helps a professional design efficient models and diagnose issues that the framework alone does not explain.
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
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
