Hire Realm developers

Hiring Guide: Realm Developers

Looking to hire Realm developers? Realm is a fast, modern, and lightweight database built specifically for mobile applications. It replaces traditional persistence layers like SQLite or Core Data, enabling real-time sync, object-based data modeling, and offline-first mobile app experiences. Whether you’re building a data-driven app, an IoT platform, or a mobile product requiring instant local storage, hiring skilled Realm developers ensures high performance, reliability, and seamless user experiences.

Why Hire Realm Developers?

Realm developers specialize in integrating the Realm database into iOS and Android applications, handling data efficiently without complex ORM layers. Unlike traditional relational databases, Realm offers reactive data models, real-time synchronization, and efficient object persistence. Skilled Realm engineers can architect apps that work flawlessly even when offline, syncing data automatically when connectivity returns.

Core Responsibilities of Realm Developers

 
• Design and implement efficient data models using Realm’s object-based database structure.
 
• Integrate Realm into mobile applications (iOS, Android, React Native, or Flutter).
 
• Develop offline-first capabilities, ensuring seamless user experiences without constant connectivity.
 
• Manage Realm Sync for real-time data synchronization between devices and the backend.
 
• Optimize performance for reading/writing large datasets with minimal latency.
 
• Implement secure data storage and encryption policies to protect sensitive information.
 
• Collaborate with backend and API teams to ensure smooth integration with server-side systems.
 
• Perform migration and version management for evolving schemas.
 
• Implement unit testing and maintain data integrity during app lifecycle updates.

Key Technical Skills to Look For

 
• Languages & Frameworks: Swift, Kotlin, Java, Dart (Flutter), or JavaScript (React Native).
 
• Database Expertise: Realm, SQLite, Core Data, Firestore, MongoDB Atlas (for Realm Sync backend).
 
• Data Architecture: Schema design, versioning, lazy loading, data encryption, query optimization.
 
• Offline-First Development: Handling sync conflicts, caching strategies, and delta updates.
 
• Cloud Integration: Realm Cloud, MongoDB Atlas, and synchronization services.
 
• Testing & Tooling: Unit and integration testing with XCTest (iOS), JUnit (Android), or Jest (React Native).
 
• Version Control & CI/CD: Git, Bitrise, CircleCI, Fastlane, or GitHub Actions.

When to Hire Realm Developers

 
• When building mobile apps that must work offline and sync seamlessly once online.
 
• When performance and scalability are critical for local data storage and real-time sync.
 
• When you need a simple, reactive alternative to Core Data or SQLite.
 
• When migrating existing storage systems to Realm for better speed and lower complexity.
 
• When developing multi-platform apps requiring consistent data models across iOS and Android.

How to Hire the Right Realm Developer

1. Define Your App’s Data Requirements

Clarify your project’s data flow — whether it needs real-time synchronization, offline-first capabilities, or hybrid persistence. This helps you target developers experienced with the relevant Realm APIs and sync mechanisms.

2. Evaluate Technical Proficiency

Ask candidates about schema migrations, performance tuning, and handling sync conflicts. Experienced Realm developers should demonstrate knowledge of optimizing queries and managing multi-threaded data access.

3. Interview Questions

 
• What are the main advantages of Realm over SQLite or Core Data?
 
• How do you handle Realm schema migrations during app updates?
 
• Can you explain Realm Sync and its integration with MongoDB Atlas?
 
• How do you secure sensitive data stored in Realm databases?
 
• How does Realm handle threading, and what are the best practices for avoiding data corruption?

4. Technical Assessment

Provide a short task: create a mobile app that stores and displays local data using Realm, includes schema migrations, and syncs updates across sessions. Evaluate their code architecture, efficiency, and understanding of data consistency.

Average Cost of Hiring Realm Developers

The cost of hiring Realm developers depends on expertise and project scale:

 
• Junior Developers (1–3 years): £40–£60/hour — proficient in integrating Realm and simple local storage.
 
• Mid-Level Developers (3–6 years): £65–£100/hour — experienced with Realm Sync, performance tuning, and migration handling.
 
• Senior Developers (7+ years): £110–£140/hour — experts in scalable, offline-first architectures and multi-platform Realm implementations.

At Lemon.io, you can hire vetted Realm developers who build fast, reliable, and secure mobile data layers across iOS, Android, and hybrid frameworks.

Why Hire Through Lemon.io?

Lemon.io connects you with highly experienced Realm developers who understand data-driven mobile architectures. Our experts specialize in reactive data flows, multi-threaded Realm operations, and offline-first applications. Whether you need to optimize an existing app or build a new one from scratch, Lemon.io ensures your developers are ready to deliver robust, production-grade results.

Hire Expert Realm Developers →

Related Skills

 
• Hire iOS Developers – Build seamless native experiences on Apple platforms.
 
• Hire Android Developers – Develop robust Android apps using Kotlin and Realm.
 
• Hire MongoDB Developers – Integrate Realm with MongoDB Atlas for real-time sync.
 
• Hire Swift Developers – Expert in building high-performance iOS apps using Realm.
 
• Hire Flutter Developers – Multi-platform apps powered by Realm database integration.

FAQs About Hiring Realm Developers