Hire the best Kotlin Developers in Bucharest, RO

Check out Kotlin Developers in Bucharest, RO with the skills you need for your next job.
  • $50 hourly
    👋 Hello! I’m a highly skilled and experienced full-stack software engineer with a proactive, solution-oriented approach. I specialize in architecting systems from the ground up, providing a clear vision and implementing the correct processes before diving into development. My experience spans a wide range of technologies, making me a true generalist capable of handling various aspects of software development. Backend: - Java (Spring, OSGI) - Kotlin - Python - Go - Rust - PHP Frontend: - Next.js - React.js - Angular - Vanilla JS/HTML - Figma - Wireshark DevOps/Miscellaneous: - AWS KMS - CloudFormation - Sentry - ECS - S3 - EKS I’m always looking for the next challenge and thrive in environments that require quick adaptation and problem-solving. Even in the most uncertain and complex situations, I excel at navigating new challenges—no matter how deep or uncharted the waters may be. If you need a software engineer who can confidently jump into the unknown and find a way to deliver exceptional results, I’m here to help you achieve your goals.
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    API
    Spring MVC
    Adobe Experience Manager
    OSGi
    Ruby on Rails
    FLA
    Apache Groovy
    TypeScript
    Python
    Java
    React
    PostgreSQL
    Android App Development
    AngularJS
    JavaScript
  • $45 hourly
    With more than 10 years of experience in QA Engineering, I bring expertise on all aspects of software quality assurance, helping build robust and reliable software products. My journey includes high-profile enterprises like Vodafone and Google, but also smaller companies and startups/ scale-ups from sectors like fintech, adtech, health tech, B2C mobile apps, teleco, SaaS and more. My track record includes optimising QA processes, implementing best practices, and orchestrating end-to-end testing lifecycles. My proficiency in test automation, performance testing, and continuous integration is complemented by a relentless commitment to quality. I love turning challenges into opportunities for growth, whether by improving testing frameworks, expanding test coverage, or aligning QA goals with business needs. Some of my skills include Leading, mentoring, and coaching QA engineers Establishing QA processes, operational workflows, and enhancing product lifecycle Developing and tracking quality metrics Documenting and refining best practices Reviewing and analyzing design and functional requirement documents Crafting QA strategies, planning, and organizing QA sprints Identifying and defining necessary test cases and automated tests Reviewing automated tests and manual test cases Integrating new tools and technologies for CI/CD Enhancing the automation framework Fostering a collaborative environment across teams and individuals Some of frameworks I've worked with Mobile Testing Frameworks: Android: Used Espresso for stable, white-box tests, UIAutomator for system interactions, and Compose Testing Libraries for Jetpack Compose. iOS: XCUI Test for reliable iOS-specific element testing. Flutter: Flutter Integration Tests for cross-platform E2E tests. React Native: Preferred Detox for white-box testing; used Appium selectively for cross-platform needs. API Testing: REST Assured for REST API validation, covering responses, authentication, and performance. Web Testing Frameworks: Selenium for cross-browser/regression testing. Playwright for parallelizable, stable tests. Cypress for quick setup and CI/CD integration in JavaScript apps.
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    iOS
    Test Automation Framework
    Python
    Java
    Automation
    QA Software & Testing Tools
    Android
    Software QA
    Bug Tracking & Reports
    API Testing
    End-to-End Testing
    Integration Testing
    Performance Testing
    Mobile App Testing
  • $50 hourly
    I describe myself as a confident and motivated person who is goal-driven, open to challenges and always keen to learn and discover new things. Described by my colleagues as a team player who is always willing to help. Over the past years, I have developed a good adaptability while working in stressful conditions, being capable of finding the best solution for business in critical situations. The passion for technology drives me to try to keep the balance between business requirements and the best technical approach.
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    Event Sourcing Framework
    Docker
    Kubernetes
    CI/CD
    Cloud Architecture
    QA Engineering
    RESTful API
    Google Cloud Platform
    Amazon Web Services
    Database
    Java
  • $55 hourly
    Senior Java Developer with 8 years experience Outgoing, hard working and always trying to get the best solution for a problem. Also a very friendly person with a good sense of humor, sporty and keen on learning new things. • Experienced in Java / Kotlin • Back-end development • Open to learning new programming languages
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    REST API
    Web Development
    Data Structures
    Algorithms
    SQL
    Git
    Azure DevOps
    Kubernetes
    Docker
    Linux
    Spring Boot
    Java
  • $60 hourly
    Software Tech Lead | Solution Architect | Blockchain & Cloud Expert Bogdan is an innovative Software Development Consultant & Tech Lead with a proven track record of delivering high-quality solutions across industries such as blockchain, digital identity, healthcare, fintech, and enterprise systems. He specializes in designing scalable architectures, leading development teams, and driving digital transformation. With expertise in Java, JavaScript, Node.js, React, blockchain (Ethereum, web3.eth), cloud infrastructure (AWS, Kafka, Camunda), and modern software architectures (DDD, Hexagonal, EDA), Bogdan excels at bridging the gap between technology and business strategy. He has successfully led and contributed to: - Blockchain-based digital identity solutions (CertME, IDBC) - Enterprise epidemic management systems (TAMEC) - Custom resource management platforms (SuperConstruct) - National-scale government solutions (Romanian Customs Authority – TSD-PN) - HealthTech innovations & infrastructure modernization (Allianz Germany) In his tenure at Microsoft, Bogdan honed his skills in software development and cloud services, contributing to projects that enhanced system performance and user experience. At ING and Raiffeisen Bank, he developed secure and efficient financial applications, ensuring compliance with industry standards. His role at Orange involved implementing scalable telecommunications solutions, improving service delivery and customer satisfaction. Bogdan thrives in fast-paced, technically progressive environments where he can apply systems thinking, strategic planning, and hands-on development to solve complex challenges. He is passionate about streamlining processes, enhancing efficiency, and leveraging cutting-edge technologies to drive innovation. If you’re looking for a high-impact tech leader to architect solutions, optimize software development, or lead transformation projects, let’s connect! 🚀
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    MongoDB
    PostgreSQL
    Oracle
    Azure DevOps
    Apache Kafka
    Spring Boot
    React
    JavaScript
    Node.js
    C#
    Kubernetes
    Docker
    REST API
    Java
  • $20 hourly
    In my role as an accomplished Senior Android Software Engineer, I offer a rich reservoir of experience and expertise. My extensive background in mobile application development, with a special focus on the Android platform, has empowered me to contribute to a multitude of successful projects. My dedication lies in delivering robust and innovative solutions, continually pushing the boundaries of what is achievable within the Android ecosystem.
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    Firebase
    Android SDK
    Game Development
    Android
    Mobile App Development
    Retrofit
    Android Room Persistence
    Android App Development
    API Development
    C++
    SQLite
    Git
    Java
  • $30 hourly
    I have an experience in many development areas but i am specialized in front-end development and I have built more than two responsive projects that works correctly on a variety of screens. I have also an good experience in git and continues deployment. I have diploma in cloud application development.
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    Flutter
    Swift
    Tailwind CSS
    PostgreSQL
    MySQL
    Vue.js
    React
    Node.js
    Laravel
  • $60 hourly
    With over nine years of experience in developing web, iOS, and Android applications across diverse industries, I am confident in my ability to contribute significantly to your team.
 Some of my notable projects that I developed single-handedly include: * https://digitalhealth ro: Ranked among the fastest websites in the world, constantly scoring 95+ in performance on Google Pagespeed. * INTVL: The first mobile app for medical statistics, available on App Store: https://apps apple com/us/app/intvl-medical-statistics/id1602981011 * https://elysianhorizons com: The first real estate platform offering real-time livability scores using air quality and security APIs. I possess advanced proficiency in: * JavaScript/TypeScript: React.js, React Native, Next.js, Node.js, Express.js, Nest.js, jQuery, Astro.js, Angular, Vue.js. * PHP: WordPress, Laravel, Drupal, Magento. * Swift: SwiftUI, UIKit. * Java: Spring, Hibernate. * Python: FastAPI, Django, Flask. * Dart: Flutter. * Other Languages: Kotlin, C#, Objective-C, C++, Golang, R. * SQL and NoSQL databases: MySQL, PostgreSQL, SQLServer, SQLite, Supabase, NoSQL, MongoDB, Firestore. * Cloud services and infrastructure: AWS (EC2, RDS, S3, IAM, Lambda, EB, EFS, Cloudfront), Firebase, Google Cloud, Heroku. In addition to my technical skills, I have a strong background in business development, project management, finance, analytics, operations, and medical engineering. This multidisciplinary experience gives me a unique edge as a software developer, enabling me to approach projects holistically.
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    PostgreSQL
    UIKit
    Flutter
    React Native
    SwiftUI
    Swift
    Python
    Java
    WordPress
    PHP
    Node.js
    React
    TypeScript
    JavaScript
  • $30 hourly
    I am a software engineer with experience in building and publishing desktop and mobile apps for small businesses. - Build & publish Android and iOS apps - Multi-platform app development: React Native, Flutter - Windows application development: C++ MFC, C# WinForms/WPF/UWP - Good altitude for team collaboration - Higher project management skills
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    Mobile App
    Desktop Application
    Android App Development
    iOS Development
    PHP
    Java
    JavaScript
    TypeScript
    React Native
    C#
    MySQL
    Flutter
    Swift
    Objective-C
  • $23 hourly
    Highly motivated to learn, self‐improve and eager to be part of a team with the same beliefs. In the last few years, I took part in many projects using Java. Problem‐solving skills and a passion for code with a strong emphasis on best practices and code reusability. Always open to learn and work with new technologies and tackle interesting problems. Strong knowledge of design and previous experience in advertising.
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    Kibana
    Grafana
    AppDynamics
    Application Performance Monitoring Software
    Splunk
    Bash
    Awk
    Back-End Development
    Node.js
    Git
    JavaScript
    RESTful API
    Spring Boot
    Java
  • $25 hourly
    I am an Android Developer, highly skilled in native app development with 7֡ years of experience designing, building, and customizing android apps for various domains such as Hotel Management, Freight forwarding & shipping software solutions, Payment System, Doctor Booking, Health, and Fitness, Food Industry, Social Media Apps, Dating App, Productivity Apps, Service Providers, etc. I have the passion to help you complete your project in the best possible way. My Android skills include expertise in: ❅ Java ❅ Kotlin ❅ Android Jetpack ❅ Android app modularization ❅ Android Architecture patterns such as MVC, MVP, MVVM ❅ WebRTC ❅ Dagger/Hilt ❅ Rx (Java, Kotlin) ❅ Kotlin Coroutines ❅ Local Database management with SQLite, Realm, ORMLITE, Room ❅ working with APIs (Retrofit, Volley, okhttp3) ❅ working with real-time APIs (WebSockets, XMPP, IoT MQTT) ❅ Firebase Integration ❅ Maps (Google, MapBox, Openstreetmap) ❅ social media integration with Facebook, Twitter, and Instagram ❅ PDF Rendering ❅ 3D Model Rendering ❅ device hardware such as Bluetooth, GPS, Accelerometer, Camera, etc. ❅ testing (Unit testing, Espresso testing, Firebase test lab) In addition to my Android skills, I also have expertise in: ❅ Data Structures and Algorithms ❅ OOP patterns ❅ Spring framework ❅ JavaFx ❅ HTML ❅ CSS ❅ Javascript ❅ TypeScript ❅ React Native ❅ Git (Bitbucket, GitHub, Gitlab) ❅ Agile methodology Why hire me? ★ I prioritize your time and reputation. I understand the importance of meeting your requirements and will only commit to your projects if I am confident in delivering 100% satisfaction. ★ I am highly organized and efficient. I keep track of schedules and deadlines, ensuring timely completion of projects. I look forward to the opportunity to work with you.
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    Google Maps
    JetPack
    RxJava
    Espresso
    Payment Gateway Integration
    Android SDK
    SQLite
    In-App Purchases
    Social Media Account Integration
    Push Notifications
    Firebase
    Java
    Android
    Native App Development
  • $25 hourly
    I'm an experienced Java developer that built my expertize by working on mid to large enterprise projects inside the financial and e-commerce sectors.
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    Angular
    React
    JavaFX
    FitNesse
    Cucumber
    Mockito
    Android App Development
    SQL
    Spring Framework
    Java
  • $40 hourly
    I'm a developer experienced in building native Android apps. I also devled into embedded development with Rust, iOS app development and Windows desktop app development.
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    Functional Programming
    SQLite
    SQL
    .NET Framework
    Android
    C#
    Java
    Rust
    Android App Development
    Desktop Application
  • $25 hourly
    Dear. This is Andrei Popa from Romania. I have been working in web&mobile development for 6 years. Released several mobile apps like Uber Taxi, Fintech, real estate and so on. Built and deployed several websites and admin panels on Ubuntu Server. Key Skills: ✔️Androiod/Java, Swift ✔️ Reactjs(Redux/Saga/Hook) ✔️ Laravel, Nodejs/Express ✔️ PHP, Javascript, CSS, HTML, WP, Shopify ✔️ Firebase, Mysql ✔️ RestAPI, Stripe, IEX, Binance ... ✔️ Web3, Solidity, Ethereum, BSC, Stellar. ✔️ Git/Github/Trellor Why me? ★ Good team work and good communication. ★ 100% client satisfaction ★ Delivery on time ★ Daily update ★ Hard-working, full time With strong and reliable skills I tend to hard-working and I have strong teamwork and sensitive problem solving ability. I enjoy a challenge to master new skills always. If you are looking for a senior developer, here is right position now. Please no doubt, feel free to contact me to make your business success. Thanks, again. Sincerely. Andrei Popa
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    web3.js
    Solidity
    Node.js
    Swift
    React
    SCSS
    Stripe
    Android
    JavaScript
    Laravel
    PHP
    Java
    MongoDB
    MySQL
  • $30 hourly
    I am a software enginner with experience in building mobile apps for small businesses. Provides app publishing services as well as development. - Build apps for Android and iOS: Native(Java/Kotlin, Swift/Objective-C), Hybrid (React Native, Flutter) - Experienced with HTML, CSS3, JavaScript, Node.js, PHP, MySQL, PostgreSQL, MongoDB, etc. - Can manage full project from scratch - Highly responsible for communications
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    Web Application
    SQL
    iOS Development
    Android App Development
    Mobile App Development
    TypeScript
    Java
    React Native
    JavaScript
    Dart
    Flutter
    Swift
    Objective-C
    PHP
  • $30 hourly
    I am a software enginner with experience in building and publihing desktop and mobile apps for small businesses. - Build native mobile apps: Java/Kotlin for Android, Swift/Objective-C for iOS (including C/C++ linkage) - Multi-platform app development: React Native, Flutter - Experienced with backend web API development: HTML, CSS3, JavaScript, Node.js, PHP, MySQL, PostgreSQL, MongoDB, etc. - Windows application development: C++ MFC, C# WinForms/WPF/UWP - Game development: cocos2d-x, Unity - Can manage full project from scratch - Well familiar with team collaboration
    vsuc_fltilesrefresh_TrophyIcon Kotlin
    SQL
    Google Cloud Platform
    iOS Development
    Mobile App Development
    Android App Development
    PHP
    JavaScript
    TypeScript
    React Native
    C#
    Flutter
    Objective-C
    Swift
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