Kotlin and Java are two powerful general-purpose languages popular for Android and beyond. We’ll discuss their top features and differences, then focus on how to smoothly transition between the two.
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Ali Faraj
CSO & CTO, Technology Services
25 Years of Experience
Ali is an IT leader and strategist with 25+ years of experience at IBM, Verizon, Thomson Reuters, and Cognizant. He has led global teams, building and scaling multibillion-dollar annual growth. As a turnaround and strategic growth expert, he has jump-started innovation, grown revenue, and improved productivity.
Previously At
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Android App Development Services – Create Unparalleled Digital Products
Transform your digital offerings with Toptal’s Android App Development Services. Our Android experts deliver applications that maximize user engagement, ensure cross-device compatibility, and drive business growth.
Get a Free Consultation NowClients Served
25,000+
Total Vetted Professionals
20,000+
Toptal Total Projects Delivered
64,000+
Industries Served
300+
TRUSTED BY LEADING BRANDS
Our Services
Toptal Android App Development Services
Accelerate your business with expert Android app development services. Our dedicated team builds high-quality, scalable apps for Android devices, ensuring seamless performance and meaningful user engagement.
Custom Android App Development
Build feature-rich Android apps tailored to your specific requirements and strategically aligned with your business priorities and goals.
Android UI and UX Design
Craft engaging, intuitive mobile app designs that enhance user experience and keep your target audience engaged.
Android App Testing and QA
Ensure flawless app performance with rigorous testing that reduces bugs and minimizes downtime.
Enterprise Android App Development
Develop secure, scalable business applications that optimize workflow and drive revenue for your organization.
Android E-commerce App Solutions
Create powerful shopping experiences with seamless checkouts, in-app purchases, and secure payment integrations for increased conversions.
Cross-platform App Development
Expand your reach by building cross-platform mobile applications that run efficiently on both Android and iOS.
Android TV App Development
Create high-performance Android TV apps that deliver engaging content experiences optimized for the big screen.
Android App Maintenance and Support
Keep your app running smoothly with ongoing support, bug fixes, and performance enhancements.
IoT and Wearable App Development
Build smart, connected digital products for Android-powered IoT devices and wearables, for more powerful and personalized experiences.
Android App Migration and Upgrades
Seamlessly upgrade or migrate your existing applications to the latest Android versions with minimal downtime.
AI and ML-powered Android Apps
Leverage artificial intelligence and machine learning to create intelligent, data-driven mobile applications.
Android Game Development
Build immersive, high-performance games powered by cutting-edge technology, advanced programming languages, and leading game engines.
Looking for guidance about the perfect Android app development service for your needs?
Get a Free Consultation NowPARTNERSHIP THAT WORKS
How We Deliver Android App Development Services
Our Android app development experts, with experience at leading companies, develop and deploy tailored solutions to meet your business needs and unique industry demands for sustainable results and long-term success.
1
Discover
A leader from our team assesses your business challenges, identifies opportunities, and recommends the most suitable engagement model.
2
Define
A Toptal leader will work with you to define your goals and service needs – from full end-to-end delivery to consulting services.
3
Develop
We will create your unique project timeline, process, and first drafts, whether you’re launching a new Android mobile app or optimizing an existing digital solution.
4
Deploy
Toptal will get to work, tracking quality assurance, handling project management, and maintaining the delivery schedule.
Ali Faraj 
CSO & CTO, Technology Services
CSO & CTO, Technology ServicesAli is an IT leader and strategist with 25+ years of experience at IBM, Verizon, Thomson Reuters, and Cognizant. He has led global teams, building and scaling multibillion-dollar annual growth. As a turnaround and strategic growth expert, he has jump-started innovation, grown revenue, and improved productivity. He has worked across verticals and across a wide range of technologies including AI/ML, cloud, ERP, CRM, ITSM, cybersecurity, and others.Ali is an IT leader and strategist with 25+ years of experience at IBM, Verizon, Thomson Reuters, and Cognizant. He has led global teams, building and scaling multibillion-dollar annual growth. As a turnaround and strategic growth expert, he has jump-started innovation, grown revenue, and improved productivity.
Previously At
CUSTOMIZED SOLUTIONS
Android App Development Solutions That Deliver Value
Toptal delivers leading Android app development services through its diverse talent network and flexible delivery models. We implement the right skills at each project phase, blending expertise from various roles for seamless execution.
- Managed Delivery by Toptal
- On-demand Talent and Teams
Managed Delivery by Toptal
End-to-end project delivery per your specific requirements.
CSO & CTO, Technology Services
Delivery Manager
Android App Developer
Solution Architect
Android Developer
Mobile Back-end Developer
Mobile UX Designer
QA Engineer
Ali Faraj
CSO & CTO, Technology Services
Ali is an IT leader and strategist with 25+ years of experience at IBM, Verizon, Thomson Reuters, and Cognizant. He has led global teams, building and scaling multibillion-dollar annual growth. As a turnaround and strategic growth expert, he has jump-started innovation, grown revenue, and improved productivity. He has worked across verticals and across a wide range of technologies including AI/ML, cloud, ERP, CRM, ITSM, cybersecurity, and others.
Previously at
Technology Experience
25+ Years
Rachael Karaffa
Delivery Manager
Rachael serves as a Delivery Manager at Toptal with a focus on leading diverse global teams in developing innovative solutions for our clients. She works across multiple disciplines, including technology, marketing, and management consulting. Rachael specializes in managing people and client relationships, process optimization, and driving teams toward optimal business outcomes.
Previously Managed Client
Experience
9+ Years
Dmytro Korobov
Verified Expert in Engineering
18+ Years
of Experience
Android App Developer
Dmytro is an experienced Android developer skilled in Kotlin, Java, and MVVM. He stays on top of Android's latest trends and best practices and utilizes design principles and Material Design guidelines. Dmytro excels in back-end engineering and is passionate about creating efficient and effective server-side logic. His programming and data management expertise enables him to develop high-quality software solutions that meet business needs.
Previously at
Piotr Poznanski
Verified Expert in Engineering
24+ Years
of Experience
Solution Architect
Piotr is a software developer, architect, and technical lead with 24+ years of experience working with CERN, Motorola Solutions, universities, and more. He has led projects, served as a scrum master, and developed and delivered complex web and mobile solutions, including business and technical requirements, architecture, 3rd-party API integrations, data acquisition, and processing for BI. Piotr co-developed the pan configuration language and has a PhD in computer science.
Previously at
Gabor Biro
Verified Expert in Engineering
17+ Years
of Experience
Android Developer
Gabor is an Android developer with over 17 years of experience in the tech industry, four in fast-paced startups such as Facebook, Hailo, and Deliveroo. He can build prototype apps with a Firebase server allowing you to validate your ideas fast; give advice and suggestions on what is technically feasible in an app, then build a production-ready MVP. Gabor can then further support the app, iterate on it, and keep track of crashes and issues to help your business lift-off and grow.
Previously at
Anderson Luiz Ferrari
Verified Expert in Engineering
31+ Years
of Experience
Mobile Back-end Developer
Anderson is a software engineer who's strongly committed to delivering the best solution for the problem. In his more than 31 year in the IT industry, he's worked in projects from custom web development, collaboration portals, e-learning platforms, ERP, CMS, project management tools, mobile apps, reporting, business intelligence platforms up to IoT projects. Anderson has an MBA in project management and holds a PMP and MCSD .NET certification.
Previously at
Ning Xu
Verified Expert in Design
9+ Years
of Experience
Mobile UX Designer
Ning is a former startup founder and award-winning designer who brings a deep understanding of user needs to her role as a senior product designer. With a passion for solving complex problems and empowering users through thoughtful design, she has earned recognition for her creativity and problem-solving abilities, including prestigious awards from IxDA and Fast Company's World Changing Ideas. Ning is an overachieving professional who can bring your design visions to life.
Previously at
Seema K Nair
Verified Expert in Engineering
21+ Years
of Experience
QA Engineer
Seema brings over two decades of software testing and quality assurance expertise to the table. She has substantial experience with manual testing and the test automation of web and mobile applications. Seema is a certified Scrum Master, IBM certified DB2 professional, and AWS certified solution architect comfortable with Agile and Waterfall approaches. Her in-depth knowledge of API and performance testing delivers excellent results.
Previously at
On-demand Talent and Teams
20,000+ vetted professionals, ready to deploy individually or in teams.
Android App Developer
Android Engineering Lead
Mobile Solutions Architect
Android App Developer
Mobile UX Designer
Game Developer
Mobile Security Expert
Business Analyst
Mobile Product Manager
Verified Expert in Engineering
9+ Years
of Experience
Android App Developer
Manuela is a software engineer, specializing in the development of AR and VR experiences and applications for mobile devices and headsets. With her focus on details and an eye for design, she delivers high-quality products that exceed clients' expectations. Manuela has five years of experience and a master's degree in software engineering.
Previously at
Verified Expert in Engineering
17+ Years
of Experience
Android Engineering Lead
David is a software engineer and an adjunct computer science professor at Stevens Institute of Technology in Hoboken, NJ. They've been involved in a number of startup businesses and worked in the financial services sector on high bandwidth/high transaction computing. They're an expert in C#/.NET and TypeScript, having used both since initial betas, and they do regular work with .NET Core and Node.js on the back end and React, Angular, Cordova, and Ionic on the front end.
Previously at
Verified Expert in Engineering
19+ Years
of Experience
Mobile Solutions Architect
Claudio has over 19 years of software development experience and a cybersecurity degree. He has handled back-end, front-end, and full-stack development, DevSecOps, application security, penetration testing, and solutions architecture. With his combined expertise, Claudio focuses on helping companies by developing and architecting secure and resilient web and mobile applications.
Previously at
Verified Expert in Engineering
17+ Years
of Experience
Android App Developer
Kevin has extensive experience in hands-on development in the Android mobile native space and with technical project and product management. His technical knowledge and cross-functional skills have been honed throughout his career in various startup and larger-sized companies, with a proven track record of delivering results that drive business growth.
Previously at
Verified Expert in Design
8+ Years
of Experience
Mobile UX Designer
Rachel is a product designer passionate about improving human experiences through technology and user-centered approaches. With 8+ years of experience, she has worked with startups and FAANG companies and has led research and product design efforts to improve companies’ goals and understand their UX problems. Rachel has worked in industries ranging from autonomous vehicles, marketing automation, fintech, ads, and recruitment platforms, to name a few.
Previously at
Verified Expert in Engineering
21+ Years
of Experience
Game Developer
Rick is an entrepreneurial leader with a background in gaming and immersive technologies. Rick has experience leading and developing defense simulations, video games, and theme park attractions in larger corporate environments and is always interested in new industries. Over the last several years, Rick's also worked in startups as a leader and primary technologist—covering code, architecture, design, and maintenance.
Previously at
Verified Expert in Engineering
13+ Years
of Experience
Mobile Security Expert
Dominik is a technological leader and product engineer with more than 13 years of experience. He has a strong background in CI/CD, DevOps, and creating extraordinary end-user-centric products. Dominik has helped accelerate the cloud transformation at SAP by scaling CI/CD for more than 20,000 developers. He is a passionate team leader, speaker, coach, and mentor.
Previously at
Verified Expert in Engineering
28+ Years
of Experience
Business Analyst
Anthony is an analytical and resourceful leader with over 28 years of experience in data engineering, database development, and process design and development. He has deep experience in the financial services industry and a keen ability to understand business and data requirements and customize value‐added applications. He's known for his expert skills in operations and risk management. Anthony is poised and intellectually curious, with executive-level written and verbal communication skills.
Previously at
Verified Expert in Product Management
35+ Years
of Experience
Mobile Product Manager
Mario is a seasoned, customer-driven professional with more than 35 years of experience in the management of digital transformation projects, developing, planning, and launching products in the telecommunications, financial, and media industries. He has helped companies create winning digital strategies and design world-class user experiences. Mario’s clients include Sony, Virgin Mobile, Monsanto, Huawei, and Blackberry.
Previously at
Looking for guidance about the perfect Android app development service for your needs?
UNRIVALED EXPERTISE
Our Talent Has Worked With Top Companies
Having previously worked with these leading global companies, our talent brings valuable insights and expertise to deliver world-class outcomes.
Why organizations choose us
Toptal in Action
Discover the cutting-edge benefits our clients enjoy from the global Toptal network.
Top-five global financial services firm partners with Toptal to reach new market with Android mobile app development.
Challenge: The client, a top-five global financial services firm, aimed to tap into a new generation of clients by developing a mobile-native banking brand for its family of services. They had a project concept but needed a specialized partner to create both the iOS and Android versions of the app.
Solution: Toptal provided app development services, including a full team led by a seasoned technical lead. The team spearheaded the project, building the app and guiding the client’s internal teams.
Impact: The new app developed by Toptal’s team enabled the client to expand its presence in the retail and consumer banking sector, especially among younger mobile users. The app had a highly successful initial rollout, receiving strong customer praise and topping download charts across the UK. It has since expanded into US markets, where it maintains a 4.9-star rating from more than 160,000 App Store reviews.
Toptal’s developers and software architects have played a pivotal role in building our app from the ground up. Their commitment to excellence and continuous delivery of new functionality aligns perfectly with our vision for our app, ensuring its ongoing success.
Managing Director, Consumer & Wealth Management
OUR THOUGHT LEADERSHIP
Explore Insights From the Android App Development Field
Read the latest articles and resources to keep you current on emerging trends in Android mobile app development, cross-platform app development, Android Studio innovations, and more.
Android App Development Related Offerings
Explore Related Services and Roles
Pair Toptal’s Android App Development Services with related competencies to effectively tackle your business challenges.
Application Services and ModernizationApplication Security ServicesiOS Development ServicesWeb Development ServicesMobile App Design ServicesWeb App Design ServicesMobile Marketing ServicesQuality AssuranceAndroid App DevelopersAndroid DevelopersApp DevelopersHybrid App DevelopersiOS DevelopersApp Store Developers
Looking for guidance about the perfect Android app development service for your needs?
Get a Free Consultation Now