Build Scalable, High-Performance Applications with Our Expert Kotlin Developers
Updated
Kotlin Development Services We Provide
Application Development
Legacy Modernization
Enterprise Integrations
Kotlin Multiplatform Development
Kotlin Consulting Services
Support and Maintenance
Why Should You Choose Our Kotlin Development Services
Specialized Kotlin Expertise
Our developers bring deep expertise in Kotlin for Android, backend, and cross-platform development. They work extensively with modern frameworks, libraries, and Kotlin best practices to build reliable, high-performance applications tailored to complex business needs.
Accelerated Delivery
We use Kotlin’s concise syntax, seamless Java interoperability, and mature tooling to shorten development cycles. This allows faster feature implementation, quicker testing, and earlier go-to-market without compromising code quality or stability.
Enterprise-Grade Integrations
Our team has proven experience integrating Kotlin applications with enterprise systems, APIs, and third-party platforms. We ensure secure, scalable, and efficient data exchange across your technology ecosystem.
Full-Cycle Project Management
From initial planning and architecture design to deployment and post-launch support, we manage the entire development lifecycle. This end-to-end approach ensures consistent delivery, clear communication, and predictable outcomes.
Industry-Spanning Experience
With experience across BFSI, healthcare, retail, manufacturing, and other industries, we understand domain-specific challenges. This enables us to design Kotlin solutions that align closely with regulatory, performance, and operational requirements.
Flexible Engagement Models
We offer onsite, offshore, and hybrid engagement options to match your project scope, budget, and timelines. Our flexible models allow you to scale teams up or down while maintaining full transparency and control.
Proven Results
Our Kotlin development services are backed by a strong delivery record, with hundreds of successful projects completed by experienced engineering teams. This proven execution capability helps reduce risk and ensures consistent project success.
Benefits of Hiring Dedicated Kotlin Developers
Access to Specialized Kotlin Talent
Hiring dedicated Kotlin developers gives you direct access to engineers who work exclusively with Kotlin across mobile, backend, and enterprise systems. Their focused expertise ensures clean architecture, efficient code, and adherence to Kotlin best practices from day one.
Faster Development and Delivery
Dedicated Kotlin developers work as an extension of your internal team, enabling quicker decision-making and faster execution. With no context switching between projects, development cycles shorten and releases reach the market sooner.
Cost Efficiency and Predictable Budgeting
By hiring dedicated Kotlin developers, you avoid the overhead of full-time recruitment, training, and infrastructure. You gain transparent pricing models and predictable costs while maintaining high engineering standards.
Scalable Team Structure
Dedicated engagement models allow you to scale resources up or down based on project requirements. Whether you need a single Kotlin expert or a full development squad, scaling remains seamless without disrupting delivery timelines.
High Code Quality and Maintainability
Dedicated Kotlin developers focus on writing modular, testable, and maintainable code. This results in applications that are easier to extend, debug, and optimize over time, reducing long-term technical debt.
Seamless Collaboration and Communication
Working with dedicated Kotlin developers ensures consistent communication, clear ownership, and better alignment with your product goals. Regular updates, sprint planning, and transparent workflows keep stakeholders informed at every stage.
Long-Term Product Stability
With dedicated developers handling ongoing improvements, updates, and performance tuning, your Kotlin applications remain stable, secure, and aligned with evolving business needs and technology changes.
Solving IT Challenges In Every Industry, Every Day.
Kotlin Development Methodology
Kotlin is an open-source, statically typed programming language that targets the JVM, Android, JavaScript, Wasm and Native, developed by JetBrains, according to kotlinlang.org. Below, the six services above are set against how Kotlin Multiplatform shares code, how Kotlin compares with Java in JetBrains' own terms, how a Java codebase moves to Kotlin, and what each stage of the methodology hands you and what moves the cost.
From application development to support and maintenance, each one listed above.
Open source under the Apache 2.0 license, according to kotlinlang.org.
The JVM, Android, JavaScript, Wasm and Native, per kotlinlang.org.
Per hour, depending on the seniority and mix of the team. The published Sthenos band.
On this page
- How Kotlin Multiplatform shares code
- Kotlin compared with Java, in JetBrains' own terms
- How a Java codebase moves to Kotlin
- What you receive at each stage
- What Kotlin development costs, and what moves the number
- What to ask a Kotlin development company
- Questions buyers ask about Kotlin development
- Related pages
How Kotlin Multiplatform shares code
Kotlin Multiplatform development is one of the six services on this page. JetBrains describes Kotlin Multiplatform as an open-source technology that enables sharing code across Android, iOS, desktop, web and server while retaining the advantages of native development. Business logic common to every platform sits in a common source set; where shared code needs a platform-specific API, Kotlin's expected and actual declarations supply it for each platform.
Figure 1. One Kotlin Multiplatform project: shared code, platform code and the user interface
Caption: the structure is JetBrains', from What is Kotlin Multiplatform (kotlinlang.org/docs/multiplatform/kmp-overview.html) and Share code on platforms (kotlinlang.org/docs/multiplatform/multiplatform-share-on-platforms.html), read 2026-09-11. The five platforms are the ones JetBrains names for code sharing.
Kotlin compared with Java, in JetBrains' own terms
Legacy modernization on this page migrates Java systems to Kotlin. JetBrains' own comparison page lists what Kotlin has that Java does not, and concedes what Java has that Kotlin does not. Selected items from both lists:
Kotlin has, Java does not
From JetBrains' list- Null safety, with null references controlled by the type system
- Extension functions, data classes and properties
- Coroutines
- Parameters with default values, and named parameters
- Expect and actual declarations
Java has, Kotlin does not
From the same page- Checked exceptions
- Primitive types that are not classes
- Static members, which Kotlin replaces with companion objects, top-level functions, extension functions or @JvmStatic
- The ternary operator, which Kotlin replaces with an if expression
- Records, and the package-private visibility modifier
How a Java codebase moves to Kotlin
JetBrains says Kotlin is designed with Java interoperability in mind: existing Java code can be called from Kotlin, and Kotlin code can be used from Java. Its backend guide says Kotlin supports gradual migration of large codebases from Java, in these moves:
- Configure the projectSet up the existing Java project to work with Kotlin.
- Write new code in KotlinStart with tests or new production code in Kotlin.
- Convert filesUse the automated Java-to-Kotlin converter included in IntelliJ IDEA.
- Keep Java runningOther parts of the project stay in Java, calling and called by Kotlin.
What you receive at each stage
The contact process on this site ends in a costed roadmap before a build is committed to. After that, each stage of the Kotlin development methodology above produces something you can hold it to:
- Business discoveryWhere Kotlin fits, whether new application development, modernization or process optimization, from workshops, stakeholder discussions and requirement analysis.Findings
- Solution blueprintingA solution blueprint: application architecture, domain models, technology stack, integrations and security considerations.Blueprint
- Visual prototypingInteractive prototypes and UI mockups, so workflows and features are validated before full-scale development.Prototype
- Agile developmentIncremental value in short sprints, with clean architecture, reusable components and automated testing.Working code
- System integrationIntegrations with ERP, CRM, cloud platforms, payment gateways, APIs and IoT systems.Integrations
- Validation and launchFunctional, performance, compatibility and security testing, then deployment to cloud or on-premise environments.Release
- Continuous evolutionMonitoring of application performance, enhancements, new features and upgrades after launch.Ongoing
What Kotlin development costs, and what moves the number
Sthenos publishes two bands: an hourly rate band and a typical project band. Where the scope is clear we quote a fixed price for a defined outcome, with a costed roadmap before any build starts.
What goes into the estimate is the scope. These are the scope lines the services on this page name:
- Which platforms: Android, backend, web or several at once through Kotlin Multiplatform
- New development, or modernization of a Java system
- Enterprise integrations: ERP, CRM, cloud platforms and third-party APIs
- Kotlin consulting on architecture, code quality and migration strategy
- A single Kotlin expert or a full development squad
- Support and maintenance after launch
What to ask a Kotlin development company
These questions apply to any Kotlin development company, Sthenos included. Each comes from a stage on this page or from JetBrains' own documentation.
- Which code will be shared across platforms, and which stays platform-specific? Kotlin Multiplatform shares common business logic and reaches platform APIs through expected and actual declarations.
- Will the user interface be native on each platform, or shared with Compose Multiplatform? JetBrains lists native UI, shared UI and a mix of the two.
- For a Java system, which parts move to Kotlin first, and which stay in Java? JetBrains describes gradual migration that starts with tests or new code.
- How will the Java that remains call the new Kotlin code, and how is that tested? Kotlin is designed for Java interoperability in both directions.
- Which enterprise systems will the application integrate with? Enterprise integrations are one of the six services on this page.
- What does support cover, including version upgrades? Support and maintenance on this page names version upgrades.
Questions buyers ask about Kotlin development
Is Kotlin only for Android?
No. JetBrains describes Kotlin as a language that targets the JVM, Android, JavaScript, Wasm and Native, and this page covers Kotlin for web, mobile and backend work. For new Android apps, Google recommends starting with Kotlin.
Can Kotlin replace Java in an existing system?
Gradually, yes. JetBrains says Kotlin supports gradual migration of large codebases from Java: new tests or production code can be written in Kotlin while other parts of the project stay in Java. Legacy modernization on this page migrates Java systems to Kotlin while preserving existing business logic.
What is Kotlin Multiplatform?
An open-source technology from JetBrains for sharing code across Android, iOS, desktop, web and server while retaining the advantages of native development. Shared business logic lives in a common source set, and platform-specific APIs are reached through expected and actual declarations.
Can I hire dedicated Kotlin developers?
Yes. This page describes dedicated Kotlin developers who work as an extension of your internal team, from a single Kotlin expert to a full development squad, and our IT staff augmentation page lists Kotlin among the mobile engineers you can hire.
Does Kotlin work with Java frameworks such as Spring?
JetBrains states that Kotlin is fully compatible with all Java-based frameworks, and that Spring uses Kotlin's language features to offer more concise APIs.
What does Kotlin development cost?
Our rates are $150 to $250 per hour, depending on the seniority and mix of the team, and a typical project runs $50,000 to $200,000. Where the scope is clear we quote a fixed price for a defined outcome, with a costed roadmap before any build starts.
Related pages
Modernizing a Java system, or sharing code across platforms? Tell us what runs today and where it has to go next, and we will give you a costed roadmap before any build is committed to. Talk to our engineers.
Kotlin Case Studies
Built a Cloud-Based LMS for a Global K–12 Education Provider
We delivered a fully managed, cloud-based Learning Management System designed to support large-scale K–12 education ecosystems. The platform enabled seamless collaboration between teachers, students, and parents through real-time notifications, interactive modules, and secure data handling.
Built using Kotlin for mobile applications alongside .NET MVC, Azure, and SQL Server, the solution supported features such as automated scheduling, auto-graded assessments, secure payments, and social learning capabilities. The LMS was engineered to function across both online and offline environments, ensuring uninterrupted learning while maintaining enterprise-level security, scalability, and performance for a global education provider.
Delivered Self-Service Ordering Solutions for the Service Industry
We developed a self-service ordering platform that modernized customer interactions and streamlined operational workflows within the service industry. The solution integrated advanced analytics, real-time order customization, barcode scanning, and QR-based interactions to reduce wait times and improve service efficiency.
Built using Java and Kotlin, with SQLite and Firebase for data management, the platform followed MVC and MVVM architectural patterns to ensure reliability and scalability. Additional integrations such as Google Maps and Retrofit enabled location intelligence and seamless API communication. The system improved inventory control, enhanced security, minimized operational risks, and delivered a fast, intuitive user experience that increased customer satisfaction and operational efficiency.
Developed a Contextually Aware Indoor Shopper Engagement Platform
We created a digitally intelligent indoor shopper engagement platform that delivered personalized in-store experiences using contextual data and real-time insights. The platform leveraged geolocation services, cloud computing, API integrations, and database management to provide targeted promotions and dynamic customer interactions.
Built with Kotlin for Android, Objective-C for iOS, and Java/J2EE with Spring and Hibernate for backend services, the solution ensured secure data exchange and consistent cross-platform performance. The platform improved retail operations by optimizing inventory visibility, enhancing customer engagement, and delivering intuitive, context-driven experiences that strengthened brand loyalty and in-store conversion rates.
