Realm Experts in Germany
matched in minutes with vetted freelancers and AI precision.Hire experts who design local-first data layers, sync logic, and mobile persistence with Realm, Realm SDK, and MongoDB Realm. They support app state, offline workflows, and data models that stay fast on iOS and Android, with precise matching to vetted, available specialists.
Meet FRATCH Experts in Germany, who have recently used Realm
Kyu-Wang Lee
Last position:
Software Architect & Lead Software Engineer at Landesamt für Steuern Niedersachsen
The goal of BIENE is to provide a uniform program for tax collection for all states.
In tax collection, the aim is to collect the assessed taxes. This includes handling due dates, documenting incoming and outgoing payments, triggering reminders or refunds. Statute of limitations and payment reminders also play an important role. All payment transactions with banks and accounting are mapped in BIENE.
Setting up the architecture and coordinating the provisioning of development and test environments at the Hanover location
Installing and configuring environments on Linux servers (Apache Kafka, PostgreSQL)
Interface tasks: coordinating and aligning the integration of software products from other departments and their test data
Upgrading application server, JDK, Maven project structure
Environment coordination and build management
Implementing external interfaces
Implementing business requirements
Designing and implementing RESTful APIs and OpenAPI specifications
Designing and implementing microservice architecture
Setting up and maintaining CI/CD pipelines
Deploying applications on OpenShift
Creating technical documentation and diagrams
Working with SQL databases (Oracle and PostgreSQL)
Setting up authentication and authorization for the application and users
Containerizing the application (automated deployment via CI/CD pipeline)
Kristoffer Lange
Last position:
Senior UX Researcher at MeinAuto.de
Research-driven Experience & Conversion Optimization in Automotive E-Commerce. Responsible for driving research-led optimization of key user journeys across vehicle search, configurator, and homepage. Worked cross-functionally with Marketing, Product, and partially Sales to translate insights into measurable business impact.
- User Research & Insight Generation: Led qualitative rapid user research following the launch of the new marketplace to identify usability issues, conversion barriers, and immediate optimization opportunities. Synthesized findings into actionable hypotheses for A/B testing and product improvements.
- Experimentation & Data-informed Optimization: Designed, evaluated, and iterated A/B tests to optimize configurator entry points, search forms, filter and sorting logics. Leveraged GA, Clarity, and experimentation data to derive statistically relevant insights and inform product decisions.
- UX & Interaction Concept Development: Conceptualized new configurator entry mechanisms, quick filters, navigation concepts, and checkout progress indicators to improve orientation and decision confidence.
- Personalization Strategy & Frameworks: Developed personalization hypotheses and use cases and collaborated with external vendors (e.g. Dynamic Yield). Established a scalable framework covering processes, responsibilities, and testing pipelines.
- Homepage Research & Experience Strategy: Co-led research-informed homepage initiatives, including cross-functional workshops, definition of user needs and requirements, phased concept development, and alignment with key stakeholders.
Abhiroop Basu
Last position:
Software Engineer III at Foundry Digital
- Developed and deployed microservices in Kotlin and Spring Boot, integrated AWS Secrets Manager to secure credentials and decreased network calls using Spring cache.
- Refactored Kafka consumer using Spring Kafka with semaphore-based backpressure to cap records and keep heap memory stable under spikes; switched to batch upserts to cut down on database invocations; added Testcontainers integration tests for Kafka and database to pave the way for future changes.
- Automated the financial reconciliation workflow in Spring Boot (Kotlin) using Spring Scheduler, transactional boundaries, JPA/Hibernate on MySQL, and Flyway migrations, saving the accounts team 16+ hours per week.
- Designed and dockerized payments end-to-end test framework in Robot (Python) with reusable keyword libraries and profiles; integrated with GitLab CI (JaCoCo XML and HTML reports) to accelerate releases and lift code coverage to 80%.
- Implemented end-to-end observability on Datadog by instrumenting services with Datadog APM, correlating metrics and logs, provisioning dashboards, and creating monitors with burn-rate alerts and anomalies to harden reliability and give stakeholders clear visibility.
Onik Mia
Last position:
SAP SuccessFactors & S4HANA Consultant at Banking Industry
Extracted relevant infotypes from SAP HCM for migration to SuccessFactors Employee Central and mapping to ECP fields.
Configured P2P integration including BAPI setup and secured data exchange with HTTPS and OAuth protocols.
Set up foundational settings in Recruiting (REC) including roles, permissions, and job requisition templates.
Implemented Career Site Builder to create a branded candidate experience and integrated external job boards.
Configured candidate application workflows, screening, interviewing, and hiring communication templates.
Set up pre-screening questions and assessment tools including DHB sanction list checks.
Implemented automated background check and KYC integration with external vendors in the REC module.
Localized job requisition templates to reflect regional job titles and regulatory compliance.
Customized onboarding document templates and localized document archiving protocols (DRTM).
Adjusted onboarding forms to capture country-specific employee information including Form I-9.
Enabled Form I-9 remote document verification and integrated eVerify with SuccessFactors.
Set up automated reminders for employees and HR to complete I-9 sections within deadlines.
Configured pre-Day 1 access for new hires to complete tasks and mandatory trainings prior to start date.
Enabled e-signature integration for onboarding documents to support remote verification.
Technologies: SAP SuccessFactors, BTP, CPI, HCM onPremise, EC, ECP, REC, ONB, Form I-9, eVerify, S4HANA.
Natascha Fadeeva-Gladbach
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
Nike Peter
Last position:
Freelance Product Manager at Freelance
- Discovery, scoping, strategy, assembling my team, implementation, regulatory approval and launch of a medical companion app within 5 months
- Led a team switching from project methodology to agile/lean methodology, set up team strategy and target KPIs, and developed features to customize physical products to individual use cases and needs
- Assessed and sharpened the concept of a patient portal for hospitals, set up resource and timeline plan, and recommended team setup, strategy and implementation
- Developed and implemented a 3rd party authentication feature in partner destinations, improved enrollment flow UX, and supported teams transitioning from project to product thinking
- Convinced major players in the transport and medical industry to enter long-term digital pilot partnerships to create value together
Marcus Rother
Last position:
AI Alchemist
- AI forensics
- AI output audits
- Concept decoding
- Narrative reframing
- Hypothesis stress testing
- AI behavior and bias analysis
- Integrating artificial intelligence as a living collaborator inside real workflows to turn raw potential into applied intelligence
- Combining human judgment with machine capability to make work clearer, faster, and wiser
José Jeria
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.
Umer Dilpazir
Last position:
Activation and Vocational Integration Program with Integrated Language Support at Berlitz
- Intensive language course with a focus on professional language content.
Jan Kronenberg
Last position:
Software Architect: Training Platform for IT Career Changers at appvanced
- Mobile: Kotlin Multiplatform (KMP), Kotlin, Swift, SwiftUI, Jetpack Compose, Ktor, Room, Koin
- Backend: Spring Boot, GCP Cloud Run, GCP Load Balancer, GCP Eventarc
- Planned and developed a cloud backend architecture with Google Cloud Platform
- Developed a cross-platform architecture with Kotlin Multiplatform (KMP)
- Tech lead for comprehensive large project including webshop, two apps and omnichannel backend
Cihan Boz
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
Jürgen Fey
Last position:
AR/VR/XR Architect at Deutsche Telekom
- Defined a generic, universal system platform for XR (AR, VR) use cases as part of the European IPCEI initiative
- Evaluated available options for backend, streaming and client implementations
- Developed PoC implementations and conducted technical evaluation of potential components
- Led the development team and defined the target system architecture for a complete end-to-end solution
- Designed and integrated GenAI PoCs (LLM, time series, prediction, agents)
- Researched NeRFs and Gaussian Splatting for XR content creation and analyzed methods to measure and reduce system latencies
- Worked on GPU scheduling, CUDA and related topics
- Defined and implemented backoffice and end user dashboards using Grafana and Superset
- Used Jaeger tracing to analyze specific events
- Defined a GenAI-based automatic alerting feature for specific events and event clusters with KPI values
- Integrated AR/VR/XR IoT devices
- Collaborated with business development and UX teams in a parallel design thinking track to align technical and customer journey scopes
- Integrated the new services and platform into existing telco environments and analyzed tools like Camara for partial integration and handover scenarios
Jan G.
Last position:
Master Data Application at confidential
Visualization, search, and maintenance of various types of master data, providing them via a REST API, and implementing a variety of import and export formats.
Implementation, architecture, project management.
Technologies and tools: Angular (Signals, Signal Store, swagger-codegen, standalone components), Java, PostgreSQL, ActiveMQ, JavaScript, Spring Boot (Spring Core, Spring MVC, Spring Data/JPA via Hibernate, Spring Security, Spring Modulith), JUnit, Flyway, QueryDSL, GraphQL, REST API, Node, npm, Maven, SonarQube, GitLab CI/CD pipelines, Docker, Nexus, OpenAPI + Swagger UI, Keycloak, OAuth2, OpenID Connect, IntelliJ IDEA, Jira, Confluence.
Tim Rüther
Last position:
Java Fullstack Developer at AOK Systems
Portal development at AOK
- Java Spring Boot
- Angular
- Microservices
- Kafka
Andrey Gershengoren
Last position:
iOS Developer at IBM Deutschland GmbH
- Further development of an existing app
- Implementation of new features
- Bug fixes
- Technologies: Swift, Xcode, Git, Jira, REST, MVVM, XCTests, UITests, Fastlane, Jenkins, SwiftUI
Discover over 15,000 top freelancers
Statistics of experts using Realm
Aggregated from the professional profiles of matched freelancers.
Experience
16 years
Position duration
2.9 years
Positions per freelancer
15
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Retail, Automotive
Certification focus areas
Information Technology, Product Development, Human Resources
Bachelor's degree or higher
80%
Master's degree or higher
40%
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
100%
Based on our profile pool as of 30 Aug 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 Realm
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 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Local-first data
Realm is used to store and query app data on the device, then sync it when the product needs shared state. It fits mobile apps that must keep working offline and stay responsive under poor network conditions. Strong experts know how to shape models, relations, and queries around the app, not around the database.
Sync and mobile
Realm is often chosen for apps that need simple persistence and smooth data flow between device and backend. In older projects, you may still hear MongoDB Realm or Realm SDK, which points to the same family of tooling. Companies bring in specialists when sync rules, conflict handling, or data migrations need careful work.
What specialists do
- Design Realm object models and schema changes
- Set up offline storage and sync behavior
- Refactor app data layers for better performance
- Handle migrations and backward compatibility
- Troubleshoot data conflicts and edge cases
Ecosystem fit
Realm is commonly used in mobile stacks alongside Swift, Kotlin, Android, and iOS app code. It can sit next to REST or GraphQL APIs, cloud services, and backend systems that provide the source of truth. A good expert understands where Realm should end and where server logic should begin.
When to bring help
Bring in freelance expertise when an app becomes data-heavy, sync bugs appear, or a rewrite is needed without breaking existing users. In Germany, companies often want specialists who can work with product teams in English and coordinate cleanly with local technical teams. This is useful for both remote support and on-site workshops.
What strong experts deliver
- Stable offline-first behavior
- Clear schema and migration plans
- Predictable sync and conflict handling
- Lean app-side data access
- Clean handover documentation
Frequently asked questions
Before you brief your next project: the most common questions about Realm.
Realm is used for local data storage, fast reads and writes, and offline-first app behavior. It helps apps keep working when the network is weak or unavailable, then sync changes later if the product needs shared data. Many companies use it in mobile apps where simple, reliable persistence matters.
Realm is often chosen when teams want a more direct object model and less manual data handling than raw SQL. Compared with SQLite, it reduces query and mapping work; compared with Core Data, it can feel simpler for some app architectures. The best choice depends on the app’s data shape, sync needs, and platform mix.
MongoDB Realm is a common name people still use, especially in older codebases and search queries. Today, many projects refer to the mobile database or SDK simply as Realm, while the product history may include MongoDB branding. A good specialist should understand both the current tooling and the legacy terms.
A strong Realm specialist usually also knows mobile app architecture, data modeling, and API integration. Swift or Kotlin skills are often important, along with migration planning and debugging sync-related issues. If the app uses cloud services, backend awareness is a plus.
Simple storage work may only need a focused specialist, but sync, schema evolution, and legacy migrations call for deeper product experience. Realm projects get harder when multiple app versions must stay compatible. The right level depends on how critical the data flow is and how much existing code must be preserved.
Yes, most Realm work can be done remotely, especially schema design, bug fixing, and migration planning. On-site time can still help for workshops, handover sessions, or complex app reviews with product and mobile teams. In Germany, many companies prefer English for technical collaboration, but local language can help in mixed teams.
Look for clear decisions in data modeling, migration safety, and sync handling, not just app screenshots. A good Realm expert explains why a schema changed, how edge cases were tested, and what happens when devices reconnect after being offline. Clean handover notes are a strong sign of quality.
If the app slows down, sync becomes unreliable, or migrations start breaking older installs, it is time to bring in a Realm specialist. Repeated data conflicts, unclear object models, and hard-to-test persistence code are also common warning signs. These issues usually grow when the app scales faster than the data layer.
The average hourly rate of freelancers in Germany who have used Realm in their recent projects is 103 €, which corresponds to a daily rate of about 824 € based on an 8-hour working day.
Of the freelancers in Germany who have used Realm in their recent projects, 80% hold at least a Bachelor's degree and 40% hold at least a Master's degree.
On average, freelancers in Germany who have used Realm 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 Realm in their recent projects are German (100%), English (94%), and French (18%).
The most common industries among freelancers in Germany who have used Realm in their recent projects are Information Technology (100%), Retail (59%), and Automotive (47%).
The most common business areas among freelancers in Germany who have used Realm in their recent projects are Information Technology (100%), Product Development (88%), and Quality Assurance (53%).
Main locations of FRATCH Experts, who have recently used Realm
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.
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We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
