Hire Realm developers

Build complex, enterprise-grade applications with expert Realm developers ready to join your team.

Developers who got their wings at

How it works

How to hire a Realm developer through our platform

Place a free request

Fill out a short form and check out our ready-to-interview developers

Tell us about your needs

On a quick 30-min call, share your expectations and get a budget estimate

Interview the best

Get 2-3 expertly matched candidates within 24-48 hours and meet the worthiest

Onboard the chosen one

Your developer starts with a project—we deal with a contract, monthly payouts, and what not

Hire Realm developer

Testimonials

Start to finish in under a week with zero wasted time

Reached out on Monday evening, connected Tuesday morning, had four qualified candidates by Wednesday.

Brian DeSpainCEO, 10X ERP

High quality, well-qualified developers

We had an excellent experience. Process is fast from the initial intake through setting up payment.

Katie RoyExecutive Director, The SPEND Initiative

7 developers hired in 24 hours

The developers helped us speed up. They quickly learned their part of the app and we’re grateful for their contribution.

Conor MackenDirector of Engineering, tvScientific

What we do for you

Vet every developer

All our developers are fully vetted and tested for both soft and hard skills. No surprises!

1000+ already scanned profiles

Learn your needs

On a quick 30-min call, share your expectations and get a budget estimate

Human-centered estimation

Shortlist the best matches

Get 2-3 expertly matched candidates within 24-48 hours and meet the worthiest

Match in a 24 hours

Handle the paperwork

Your developer starts with a project—we deal with a contract, monthly payouts, and what not

Hire after 1–2 interviews

Hire Realm developer

The lemon tea

Why hire Realm developers through our platform?

Find devs with skills you can trust with Lemon.io, so you can stop looking and start making progress again.

Cost

Every one of our 1300+ senior engineers has passed through our four-step vetting process, covering everything from soft to hard skills.

White-glove Service

We provide you with a list of senior devs just 48 hours after you tell us what skills you're looking for, allowing you to hire devs faster so you can get moving again.

CV Database

Our risk-free replacement guarantee comes without caveats, restrictions, or questions asked. If you want a different dev, just tell us and we'll match you with another, free of charge.

What you should know about modern Realm devs

by Karina Tretiak

Recruiting Team Lead at Lemon.io

Verified Expert

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 →

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

What is Realm used for in mobile development?

Realm is a mobile-first database designed for offline and real-time applications. It allows developers to store data locally on a device and sync with the cloud automatically when connected.

Is Realm better than SQLite or Core Data?

Yes, Realm is faster, simpler, and more developer-friendly than SQLite or Core Data. It eliminates the need for manual ORM mapping and offers real-time sync and reactive data features.

Does Realm work offline?

Yes. Realm was built for offline-first use cases, allowing users to interact with local data even without internet connectivity. Changes automatically sync when the device reconnects.

Can Realm be used in Flutter or React Native?

Yes, Realm provides SDKs for Flutter, React Native, iOS, and Android, making it suitable for cross-platform mobile app development.

Can I hire remote Realm developers through Lemon.io?

Absolutely. Lemon.io connects you with pre-vetted Realm developers ready to work remotely, ensuring expertise in data synchronization and mobile database optimization.

Book a call with an expert so you can be sure in your hiring strategy

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Why hire Realm

Over 6500 companies use Realm as their main framework, including giants like Google, Amazon and Lyft.

High-quality web apps

Realm's modular approach lets devs reuse components, so they can seamlessly manage app complexity.

Faster development process

Realm's architecture and a vast library of pre-built components speed up development, so you can get to market sooner.

Enjoyable user experience

From smooth, responsive interfaces to reduced loading times, devs can use Realm to boost usability.

Scaling made easy

Realm's modular, component-based architecture makes it easy to scale applications as traffic grows.

Case studies

Aerospace

The experience with Lemon.io has been fantastic. The interview process has been good, the caliber of people – excellent and integration has been very smooth.

Marc HorowitzCOO of SkyFi

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Telecommunications

We needed extra developers to clean off all these bugs so the company could skyrocket.

Conor MackenDirector of Engineering

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We needed extra AI engineers to keep our ambitious project running.

Mike LukimanFounding Senior Software Engineer at Everstar.ai

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Frequently asked questions

To hire a Realm developer, companies usually apply to classic job publishing websites such as Indeed, LinkedIn, Glassdoor, and Seek. They also use local websites that offer job publishing services. You need to create the job listing, choose the relevant websites, publish the job listings, check the CVs, and proceed with the candidates who have the skills and experience that are good for your project.

To make the hiring process more comfortable, ask Lemon.io for help, and we will offer you 2-3 pre-screened developers who will meet your requirements. We can provide you with a Senior Realm developer for cooperation as an independent contractor or for direct hire.

To hire a Realm developer you can start by creating a company overview, salary expectations, and a list of the skills and experience needed for the Senior Realm developer’s position. The next step could involve finding screening questions to use during screening calls and technical interviews. If you prefer a different approach and are not prepared to spend time reviewing CVs and preparing for interviews, simply apply and share a project overview with our team. We will then present you with 2–3 qualified developers who have already completed all screening stages and are ready to join your project.

The best certifications for Realm developers are MongoDB Developer Certification, Associate Android Developer, Apple Certified iOS App Development with Swift, Android Developer Nanodegree, iOS Developer Nanodegree, Android App Development Specialization, iOS App Development with Swift Specialization, Mobile Development Paths, Realm Academy, Firebase Developer.

Yes, Realm developers are still in demand. Realm can help handle offline data storage and synchronization, which is important for mobile apps that need to function without constant internet connectivity. It also has a high level of integration with MongoDB Atlas, allowing developers to leverage backend services and synchronization capabilities.

If you are a new client and would like to use a no-risk paid trial period in cooperation with Lemon.io – it can be up to 20 hours. This no-risk paid trial allows you to see how the Realm developer works on the tasks before signing up for a subscription.

If the Realm developer fails to meet expectations, for example, by missing the deadlines, we’ll find a new remote Realm developer for your startup with our zero-risk replacement guarantee.

You can hire a Realm developer through Lemon.io in 48 hours. It’s possible because Lemon.io is a marketplace with a pre-screened community of Realm developers. All of these developers have already passed our vetting process, which includes the VideoAsk survey, completion of their me.lemon profile, a screening call with our recruiters that includes various technical questions, and a technical interview with our developers. The main benefit is not only a fast and comfortable hiring process – we will also connect you with the best Realm developers in the industry because only 1% of the applicants can join the community.

The screening process for Realm developers at Lemon.io has a few stages: VideoAsk survey, completion of their me.lemon profile, a screening call with our recruiters that includes various technical questions, and a technical interview with our developers.

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