Build modern Android applications, scalable backend systems, and high-performance mobile platforms with experienced Kotlin developers. We work across Jetpack Compose, Spring Boot, Kotlin Multiplatform, and enterprise-grade architectures used in consumer apps, SaaS platforms, fintech systems, and large-scale digital products.
- Stable Codebases Structured for Long-Term Product Evolution
- Faster Feature Rollouts with Modern Kotlin Development Practices
- Strong Capability Across Native Android, Backend APIs & Shared Mobile Logic
A Mumbai-Based Kotlin Engineering Team Serving Global Markets
We are a product-focused development company building Kotlin-powered Android applications, backend platforms, and scalable mobile systems for businesses across the US, UK, and international markets, with experience as long-term mobile app development partners.
Our engineers work closely with product teams in active development environments where engineering quality, release consistency, and long-term platform scalability play a critical role in ongoing product growth.
- Kotlin engineering experience across 20+ business and technology sectors
- Delivery workflows designed for fast-moving product environments
- Long-term support across mobile and backend application ecosystems
How to Hire a Kotlin Developer Through Code B
Most engagements move from initial requirements to active Kotlin development within 3 to 5 business days, with no extended discovery phases before code gets written.
Share Your Requirements
Tell us about your product, development stage, and Kotlin requirements across Android, backend, or multiplatform development.
Engineer Matching
We match Kotlin engineers to your stack, architecture, workflows, and timezone based on your actual technical environment.
Technical Review & Alignment
Evaluate code quality, communication, and engineering approach through a scoped technical discussion or task before moving forward.
Active Development
Your engineer joins your existing workflows, tools, and sprint cycles quickly, with active contribution from the first sprint itself.
Kotlin Solutions We Have Delivered
Native Android Banking Platform for Retail and Business Banking
Indo Zambia Bank required a complete rebuild of its Android banking application after limitations in the existing platform affected usability, scalability, and banking workflows.
We redeveloped the application end-to-end, covering retail banking, business accounts, transaction management, and mobile payment gateway integration within a modernised Android experience aligned with Play Store delivery standards and future feature expansion.
Hire when building native Android applications with Jetpack Compose, ViewModel, Room, and the full Android SDK across modern mobile app development environments that require end-to-end ownership of the UI layer, lifecycle management, and Play Store release cycles.
Hire when your API or microservice layer is written in Kotlin on Spring Boot or Ktor. These developers handle coroutine-based concurrency, database integration, and REST or gRPC service design.
Hire when you want shared business logic across iOS and Android while keeping platform UIs native. Ideal for teams that need code reuse without compromising on platform-specific performance or UX behaviour.
Idiomatic Kotlin Development
Our engineers write production-grade Kotlin across the full stack, coroutines, Flow, sealed classes, and extension functions used as intended, not bolted onto Java patterns. Architecture decisions are made with a long-term codebase in mind, covering lifecycle management, memory behaviour, background processing, and microservices architecture patterns in conditions that reflect actual product usage.
Coroutine & Concurrency Expertise
Concurrency is where Kotlin implementations most commonly break down at scale. Our engineers understand structured concurrency, cancellation behaviour, dispatcher selection, and application performance testing at a level that prevents threading issues from surfacing in production, applied consistently across Android ViewModel state management and high-volume async request handling on Ktor and Spring Boot backends.
Kotlin Multiplatform Architecture
KMP works well when the shared logic boundary is clearly defined, and the platform-specific behaviour on both Android and iOS is preserved. Our engineers assess that the boundary objectively shares data and business logic layers, where duplication is the real cost, and native UI, where platform conventions matter. The approach is decided by your product's requirements, not a default preference for any one delivery model.
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Industries Covered
Jetpack Compose interfaces, MVVM and MVI architecture patterns, Room persistence, WorkManager scheduling, and Hilt dependency injection for scalable Android applications across consumer, SaaS, and enterprise environments.
Coroutine-based backend systems using Spring Boot and Ktor, covering REST and gRPC APIs, PostgreSQL and Redis integration, asynchronous processing, and containerised deployments across enterprise cloud computing environments on AWS and GCP.
Shared business logic and data layers across Android and iOS, reducing duplicated mobile code while preserving native platform experiences, maintainable architecture, and streamlined release workflows.
On-device ML implementation using TensorFlow Lite and ML Kit for image analysis, OCR, NLP-driven features, recommendation systems, and low-latency AI experiences within Android applications.
Internal Android applications for operations, logistics, and field teams with offline-first sync, MDM compatibility, Active Directory authentication, scoped storage compliance, and secure enterprise mobility workflows.
Migration from legacy Java codebases to modern Kotlin architecture, including RxJava-to-coroutines refactoring, XML-to-Compose migration, modularisation, and large-scale Android architecture restructuring.
Wear OS applications built with Tiles, Complications, and Health Services integration for fitness platforms, healthcare monitoring systems, enterprise wearables, and connected device ecosystems.
Companion applications for BLE- and Wi-Fi-connected devices, covering sensor communication pipelines, device provisioning workflows, real-time sync, and firmware update management.
Integration of payment, analytics, identity, messaging, and engagement platforms including Stripe, Firebase, Auth0, Twilio, and Segment with scalable abstraction layers and maintainable integration architecture.
Engagement Approach
The right fit when your Android, backend, or multiplatform product needs consistent Kotlin engineering ownership across an extended release cycle.
Full Codebase Ownership
Your engineer owns the entire development cycle, planning, building, testing, and releasing, without splitting attention across other projects or codebases.
Architecture Decision Continuity
MVVM or MVI structure, modularisation boundaries, coroutine layer design, and dependency injection setup are decisions your engineer makes and maintains across every release.
Codebase-Specific Matching
Engineers are matched to your exact Kotlin context, Jetpack Compose or XML, Ktor or Spring Boot, greenfield build or Java migration.
Release Management
Gradle configuration, Play Store submissions, and CI/CD pipeline ownership sit with your engineer throughout the engagement.
Industries We Serve
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Kotlin Development at Every Stage
Kotlin engineering involvement looks different depending on where your product stands, the codebase maturity, team structure, and delivery pressures all shape what kind of engagement makes sense.
Startups
Ship a production-ready Android or backend product without building an internal Kotlin team prematurely. One dedicated engineer takes ownership of your codebase, Play Store delivery, and release configuration from day one.
Mid-Size Businesses
Scale your Kotlin product without disrupting the engineers already in place. Add capacity at the layer where the bottleneck is, Compose UI, backend API, or KMP shared logic — while your existing team stays on their current scope.
Enterprise
Large Kotlin codebases need modularisation, consistent CI/CD pipelines across teams, and Java-to-Kotlin migration managed without disrupting active release cycles. Engineering involvement at this stage is structural, not just feature-focused.
They have strong expertise in the latest technologies and provide excellent guidance in using them effectively.
CODE B launches the products quickly, and their solutions have excellent architecture and are scalable.
CODE B is proactive in coming up with solutions.
Aside from getting the job done, they’re able to provide their expertise and share their opinion.
They’re a very bright team that requires minimal levels of communication or time investment to be very effective.
Their constant communication was a key aspect of the success.
They completed the project within the timeline we gave them, and they did it within budget.
Had a great experience working with the team and in times of crisis, CODE B team was always there to support us.
The way that they have supported us by giving us one of their developers to work directly with our development team.
Our overall experience has been very positive.
They are friendly and reliable.
The ability to deliver on time impressed us the most.
They’re excellent at what they do and come up with solutions for various problems.
CODE B will work overtime to resolve issues, which is a difficult trait to find.
Code B’s communicative.
I’ve had a great experience working with CODE B
The main positive point of working with CODE B team is their analyzing skills.
They are receptive and try to adjust to meet our requirements.
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