Kotlin App Development Services
for Future-Ready Teams

Whether building a mobile app, scaling your backend, or exploring multiplatform development, our Kotlin engineers plug into your team to help you move faster, write cleaner code, and stay focused on what matters.

Let’s talk about your Kotlin project

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Why teams choose Kotlin — and what holds some back:

Kotlin offers flexibility, concise syntax, and robust support for mobile and backend development. Even with a strong programming language, teams often face practical hurdles — from finding experienced Kotlin developers to balancing clean code with tight deadlines.

 

Here’s how working with a trusted Kotlin development company can help:

  • Clearer, faster development cycles

    Kotlin’s clean, concise syntax reduces boilerplate and helps catch issues early. Our teams leverage it to your advantage by writing maintainable code that’s easier to review and faster to deploy.

  • A smoother path for Android and beyond

    Kotlin isn’t just great for Android — it also supports server-side and multiplatform development. We help you take full advantage of that versatility without overengineering.

  • A talent pool that’s ready to go

    Finding skilled Kotlin developers might be challenging. We make it easier by matching you with dedicated Kotlin experts who understand your domain and know how to work inside real product teams.

  • Less legacy, more flexibility

    If you’re working with legacy Java code, Kotlin helps gradually modernize your stack. Our developers help manage that transition smoothly, one module or service at a time.

  • No need to reinvent your process

    You don’t have to change how your team works to bring in Kotlin support. We adapt to your tools, workflows, and pace — no disruption required.

  • Room to experiment, minimal risk

    Want to explore Kotlin Multiplatform or newer tools like Compose? We can help you test and validate without overcommitting — so you stay flexible without betting the roadmap.

Our Kotlin Development Services

We work with scale-ups and growing tech teams to deliver Kotlin software development that meets real-world needs — whether launching a product, enhancing existing solutions, or filling gaps in capacity or expertise. Our approach is collaborative, adaptable, and grounded in experience.

  • Kotlin Application Development Services

    We design and build mobile and backend applications using modern Kotlin practices. The focus is on clean, readable code that supports your product’s evolution, whether starting from scratch or scaling an existing system.

  • Multiplatform Development (KMM)

    Looking to reduce duplicate work across platforms? We help you use Kotlin Multiplatform where it makes sense — sharing logic between Android, iOS, desktop, or web while keeping each experience smooth and native.

  • Legacy Java-to-Kotlin Migration

    Transitioning from Java to Kotlin doesn’t need to be disruptive. We guide gradual migrations that improve maintainability, reduce risk, and modernize your stack, without sidelining your roadmap or breaking what already works.

  • Backend Development with Kotlin

    Kotlin works well beyond mobile. We build server-side systems using frameworks like Ktor and Spring Boot, ensuring your backend is scalable, testable, and aligned with the rest of your tech stack.

  • Custom Discovery & Architecture Workshops

    If you’re at a crossroads or planning a major change, we run short, focused workshops to help you make smart technical decisions. From validating an idea to reviewing architecture, we give you clarity — fast.

  • Ongoing Support and QA

    We stay with you beyond launch. Our team provides code maintenance, feature support, and QA testing to keep things running smoothly and help your product evolve without losing momentum.

  • DevOps & Infrastructure for Kotlin Apps

    From CI/CD pipelines to cloud infrastructure, we help you set up the proper foundation for deploying and scaling your Kotlin applications securely, efficiently, and with minimal manual effort.

  • Team Extension & Staff Augmentation

    If you need to scale quickly, we provide dedicated Kotlin developers who integrate into your team and start contributing fast. It’s your process — we just help you do more with it.

  • Have a project in mind or need extra help to move faster?

Cooperation Models

No two projects are the same. That’s why we offer three collaboration models tailored to your startup’s needs — whether you’re building a long-term product, delivering on a deadline, or growing internal expertise.

  • Dedicated Development Teams

    Best for long-term commitment

    Get reliable, long-term support from developers who become part of your core team. Our Kotlin specialists integrate into your workflows and stay aligned with your evolving roadmap, giving you consistency and control without the hassle of hiring in-house.

  • Project-Based Engagements

    Best for clear deliverables and timelines

    When you need to launch a new feature, MVP, or custom tool, our project-based model delivers results. We form a cross-functional team around your scope, handle the end-to-end delivery, and stay on track with regular checkpoints and clear milestones.

  • Custom Tech Training

    Best for targeted team upskilling

    Empower your team with practical skills in Kotlin, GenAI, green coding, and more. Our workshops are built around your real-world challenges and delivered by senior engineers. Online or on-site, teams apply what they learn through exercises, guided sessions, and actionable feedback.

Not sure which model fits? Tell us about your project and team, and we'll help you find the right engagement type.

Example Tech Stack for Kotlin Software Development

We rely on a carefully curated set of tools and frameworks to build secure, scalable applications — from backend to mobile, testing, and deployment. Our teams combine best practices with the right technology choices for your product needs.

  • Languages & Frameworks

    • Kotlin
    • Spring Boot
    • Ktor
    • Android SDK
    • Jetpack Compose
    • Kotlin Multiplatform
    • React
    • TypeScript
    • HTML5/CSS3
    • Material UI
  • Cloud & DevOps

    • AWS
    • Google Cloud
    • Azure
    • Docker
    • Kubernetes
    • GitHub Actions
    • Terraform
  • Databases & Storage

    • PostgreSQL
    • MongoDB
    • Firebase
    • SQLite
    • Realm
  • Integrations & APIs

    • REST
    • GraphQL
    • gRPC
    • WebSockets
    • Firebase Cloud Messaging

Kotlin vs. Java — When to Choose Each

Kotlin and Java both power countless apps and systems worldwide — and in many cases, they even work side by side. But if you decide which to go with for a new project (or considering a switch), it helps to understand how they differ in practice, not just on paper.

Here’s a quick breakdown to help you choose the right fit for your team and your goals:

Kotlin

Concise, expressive syntax with built-in null safety.

Java

Verbose but familiar, with a long-standing developer community.

Kotlin

Full support in IntelliJ, Android Studio, and multiplatform projects.

Java

Broad ecosystem with robust IDE, build, and debugging tools.

Kotlin

Great for Android apps, modern backends, and cross-platform projects.

Java

Ideal for enterprise systems, legacy integrations, and large-scale apps.

Kotlin

Easier to adopt for teams familiar with modern programming paradigms.

Java

Easier for teams with strong Java experience or maintaining old code.

Kotlin

Kotlin’s modern ecosystem evolves quickly and supports cross-platform growth.

Java

Java’s stability and backward compatibility are hard to beat for large, established systems.

Not sure which stack fits your product best? We’ll help you evaluate both and align your tech choices with long-term value.

Meet Our Kotlin Developers

We don’t just connect you with Kotlin talent — we find people who’ll fit right into your team’s rhythm and mindset. Whether you’re building a sleek Android app, migrating from Java, or need Kotlin expertise on the backend, our engineers combine solid experience with collaborative spirit. Here’s what that looks like in practice:

  • $67/h

    Cloud Engineer

    Adam D., DevSecOps, 10+ years of experience
    Skilled in AWS cloud technologies with a strong focus on cloud security, Python programming, and the administration of AWS accounts, contributing to safeguarding critical infrastructures while seeking new opportunities for growth in a collaborative and transparent environment.
    • Cloud Platforms: AWS, Azure, GCP
    • DevOps

    Request full CV

  • $55/h

    Senior LLM Advisor

    Natalia K., 7+ years of experience
    Natalia has led multiple AI transformations, focusing on advanced text processing and domain-specific knowledge transfer. She’s adept at bridging R&D with practical business use cases.

    Request full CV

  • $34/h

    Application Security Engineer

    Den B., 4+ years of experience
    Skilled in global penetration testing, including web application, API testing, social engineering, OSINT, external network, and Active Directory assessments. Proficient in using methodologies like OWASP Top 10, OWASP API Top 10, WSTG, ASVS, PTES, and CASA to conduct thorough security assessments and identify vulnerabilities.
    • Cloud Platforms: AWS, Azure, GCP
    • DevOps
    • Java / Kotlin
    • JS (React / Angular / Vue)
    • PHP: PHP, Laravel, Symfony, API Platform
    • Python (Django/Flask/Fastapi)

    Request full CV

  • $60/h

    Cross-Platform App Design Specialist

    Alexander V., 7+ years of experience
    Alexander focuses on designing web and mobile apps using Flutter and React Native. His background includes working with fast-growing digital products in fintech and education. He excels at prototyping, accessibility, and building scalable, responsive design systems to support development and user success. Alexander delivers both Android and iOS app design services.
    • Flutter
    • React Native

    Request full CV

  • $50/h

    Senior Flutter Developer

    Andrzej B., 5+ years of experience
    A mobile developer with extensive Flutter expertise who can architect complex applications from concept to deployment. Experience includes enterprise-level application development, implementing complex backend integrations, and mentoring junior developers.
    • CI/CD
    • Dart
    • Firebase suite
    • Flutter
    • GraphQL
    • Integration testing
    • Kotlin
    • Obj-C / Swift
    • RxJS / NgRx / Redux / Vuex/Pinia / Riverpod
    • Widget testing

    Request full CV

  • Kotlin Backend Developer

    Den K., 4+ years of experience
    Proficient Kotlin developer with a strong background in developing server-side applications. Contributed to various projects, focusing on building backend components that provide high scalability and performance. Experience includes integrating user-facing elements with server-side logic, optimizing database reliability, and collaborating with cross-functional teams to enhance application functionality.
    • CI/CD
    • Java
    • Kotlin
    • Orchestration: Kubernetes, Docker
    • PostgreSQL / MySQL / SQL (general) / Snowflake / Redshift
    • RESTful APIs
    • Spring (Boot/WebFlux/Data) / Hibernate / Quartz Scheduler

    Request full CV

Our Kotlin Development Process

Every project is unique, but we believe great software begins with effective collaboration. Our Kotlin application development process is built to be clear, flexible, and supportive — especially for teams looking to move fast without cutting corners. Here’s what working with us usually looks like:

  • Getting aligned

    Step 1

    We start by studying your requirements and project vision. Whether you have a full spec or just an idea, we work with you to shape a practical scope. This step is all about understanding your goals, timeline, users, and technical needs — and helping you make smart early decisions.

  • Building the right team

    Step 2

    Once we’re on the same page, we put together a team that fits your project — from one or two Kotlin developers to a full cross-functional squad. We make sure everyone’s aligned on the roadmap, understands the context, and is ready to contribute from day one.

  • Writing clean, testable code

    Step 3

    We work in sprints and keep you in the loop throughout — with regular updates, quick demos, and space for feedback. Our Kotlin developers care about clean code and good documentation, but also about solving real problems. We aim to ship useful things early, not just tick boxes.

  • Testing and validating

    Step 4

    Before anything goes live, we run it through solid QA. That includes performance checks, usability testing, and catching edge cases that could trip users up. The goal is simple: make sure your product works as expected, and works well.

  • Launching and supporting post-release

    Step 5

    When it’s time to release, we’ll support you through it — from final polish to go-live. And if you need help afterward, we stick around. That might mean continued development, bug fixes, or just being available for questions. You choose what makes sense.

Why Choose Beetroot as Your Kotlin App Development Company

We work best with companies that value solid expertise, strategic thinking, and long-term collaboration. Whether you’re launching a new project or scaling existing functionality, we bring the right balance of flexibility, technical strength, and human approach to make it happen.

  • Built for growth-ready teams

    We’ve supported projects from early-stage MVPs to rapidly scaling platforms. Our teams know how to work with evolving roadmaps and keep things moving — even when plans shift. We’ll help you stay focused, deliver high-quality work, and maintain momentum.

  • Access to top talent markets

    Originating in Sweden, Beetroot is an international tech ecosystem with L&D locations in Europe and Vietnam. That gives you access to reliable, time zone-friendly professionals who understand both your tech and your team culture.

  • Engineers who fit your team

    We prioritize skill and synergy. Our developers combine solid engineering practices with the communication and collaboration skills needed to work in cross-functional teams. You get people who contribute to the codebase and your culture.

  • Flexible engagement models

    We’re not locked into a one-size-fits-all setup. You can start small and scale as you grow, or bring in a short-term team for a specific project. Whether you need 1 developer or 10, part-time or full-time, we’ll adapt the model to match your priorities and pace.

  • Sustainability focus

    We view technology as a tool for positive change — for our clients, the people, and the world. From supporting local communities to driving more energy-efficient coding practices, we embed sustainability into how we hire, operate, and deliver software.

  • Predictable costs

    We believe great partnerships start with clarity. That’s why we align on scope, priorities, and budgets up front — and stick to them. Our approach keeps your costs transparent and your planning stress-free, with enough flexibility to explore new ideas without surprise overruns.

What Our Clients Say

We could tell you how reliable, collaborative, and skilled our engineering teams are — but we’d rather let our clients speak for themselves. Here’s what companies that’ve worked with Beetroot have to say:

  • Co-Founder & CTO of Genomics Platform

    Our team was very satisfied with the quality of Beetroot’s work, as a whole. They bring an enjoyable attitude to the project while staying on top of all milestones for their deliverables.

Featured Cases

See how Beetroot’s Kotlin developers have helped companies similar to yours launch new products, modernize legacy systems, and scale with confidence. From backend systems to mobile apps and cross-platform solutions, our teams bring deep Kotlin expertise and a collaborative mindset to every project.

  • IoT Healthcare Application

    A leading air purification company teamed up with Beetroot to fix performance issues and enhance  their mobile app’s user experience. We built a dedicated team of mobile developers, QA engineers, and designers to refactor the legacy code, cut down CPU usage, and resolve device disconnection issues. With a refreshed UI and real-time analytics in place, the app’s rating jumped from 1.9 to 4.7, while support tickets dropped by 85%.

    Read full story

    • Python
    • C#
    • Generative AI

Custom Tech Workshops

Need to build up your team’s skills — fast? Our workshops focus on real-world tech challenges, not just theory. Whether it’s understanding GenAI, writing greener code, or staying compliant with new EU rules, we tailor each session to your needs, your tech stack, and your pace.

  • Led by engineers who get it.

    Workshops are facilitated by senior tech experts who know what it’s like to ship real products under pressure.

  • Focused on what matters now.

    We design each session around current technologies and pain points, so your team walks away with insight they can use today.

  • Shaped around your team.

    Online or in person, short or multi-day — we adapt to your workflows, not the other way around.

Let’s talk about your Kotlin project:

Have a project in mind or just exploring options? Share a few details and we’ll get back to you shortly. Whether you need a full Kotlin development team or a few skilled hands to support your in-house crew, we’re here to help.

    FAQs

    Questions we get asked most often about Kotlin development. If you have a specific inquiry, contact our team directly.

    Nick Tykhomyrov, CBDO, Beetroot

    Nick Tykhomyrov

    CBDO