Hire the best Java Developers in Istanbul, TR
Check out Java Developers in Istanbul, TR with the skills you need for your next job.
- $40 hourly
- 5.0/5
- (15 jobs)
🚀 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 with a perfect 𝟏𝟎𝟎% 𝐉𝐨𝐛 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐑𝐚𝐭𝐞 🌟 👋 Greetings! With my experience and expertise, I guarantee exceptional results that not only meet your expectations but exceed them. 🚀 Flutter & Dart: I specialize in developing cross-platform mobile applications with Flutter and Dart, ensuring a seamless experience for both Android and iOS users. 🎨 UI/UX Excellence: From Figma-Zeplin to pixel perfect widgets. 🌐 Backend Expertise: I seamlessly integrate Firebase and AWS services, expertise on Rest/Graphql API. 💡 What Makes Me Stand Out: ✅ Top-Rated Plus Status 💯 100% Job Success Rate 💪 State Management Expertise: Provider, Riverpod, Bloc, Mobx. 📱 Cross-Platform Proficiency 🌟 Client-Centric Approach 🤝 Partner with me, and you'll experience: ⏱ Fast Development Turnaround 📈 Continuous Communication 🔐 Secure and Scalable Solutions 🌟 Contact me today to discuss your project and take the first step towards app success!JavaHybrid App DevelopmentFlutterMobile App DevelopmentFirebaseMobile App DesignAPIAndroidiOSKotlinSQLAPI IntegrationDartMobile App - $40 hourly
- 5.0/5
- (52 jobs)
I specialize in the development of native Android applications. Staying current with the latest approaches and adhering to best practices, I am dedicated to delivering high-quality apps that meet both user expectations and industry standards. Technical Skills: -Proficient in native app development through the Android SDK -Experienced in version control systems, with expertise in Git -Skilled in Kotlin and Java programming languages -Proven track record of publishing apps on platforms such as Google Play Store, Samsung Galaxy Store, and Amazon Appstore -Utilize Jetpack libraries, including Navigation Component, Data Binding, and Hilt Dagger for efficient development -Expertise in ad integration, including AdMob, Facebook, MoPub, and GDPR compliance -In-depth knowledge of local and remote databases, leveraging Firebase and Room library -Committed to writing reusable and clean code, following the MVVM architecture -Proficient in UI design, utilizing tools like Adobe XD, Figma, and Android Studio -Experienced in bug fixes and UI corrections within Android apps -Integration of Branch.io, Google Tag Manager, and Google Analytics -CI/CD integration for efficient and automated project deployment -Jetpack compose UI development Services: -End-to-end development of native Android apps, including design and API integration -Bug fixing and continuous improvement of existing native Android apps -Ability to clone existing iOS apps for cross-platform consistency -Code refactoring to enhance the efficiency and maintainability of existing codebases I am passionate about delivering seamless user experiences and am well-versed in the entire app development lifecycle. Let's collaborate to bring your ideas to life!JavaAndroid SDKMobile App ImprovementFirebaseKotlinIn-App AdvertisingNative App DevelopmentAndroid StudioSQLiteAndroid App DevelopmentFacebook AdvertisingUser AuthenticationIn-App PurchasesMobile App DevelopmentAndroid Room Persistence - $55 hourly
- 5.0/5
- (5 jobs)
Distributed and highly concurrent software with 10+ years of experience. BSc and MSc in Computer Science. Former Nokia employee. I have served in the telecommunication industry for a decade and was responsible for products serving millions of users daily.JavaChatbotLarge Language ModelDistributed ComputingMultithreaded ProgrammingJDBCSpring BootPython - $35 hourly
- 5.0/5
- (19 jobs)
Experienced software engineer for web and mobile development. Interested in working for both startup and existing project. Worked in small, medium and enterprise applications using modern web and mobile technologies. Attention in details, fast learner and interested in problem solving.JavaCSSHTMLGitPythonMySQLReactPHPNode.jsKotlinJavaScriptAndroidReact NativeFirebaseiOS - $99 hourly
- 4.8/5
- (42 jobs)
I'm an experienced Windows, iOS and Android Reverse Engineer. I have a lot of experience in reversing applications, games, programs and systems. With +10 years of hands-on experience in Reverse Engineer and Malware Analysis, I am also a cybersecurity expert with experience in cybersecurity research and development at a world-class R&D laboratory in the field of Cyber Operations. In this work, I gained experience in network traffic analysis, malware analysis and cryptography. My main skills: * Extract Data, Code, Algorithms, Signatures and Network Addresses from Android Apps, iOS App and Windows App * Deep expertise in Smali bytecode * Decompile Apk File and convert to full source code * Application Modification for Add, Remoave, Modify Functionalities * Bypass SSL pinning. Interception, Modification and Analysis of Network Traffic * Creation of Private API for a Applications or Programs * Decompilation, Debugging, Analysis and Modification of Native Android Libraries * Know arm and x86 assembler * Expertise in analyzing sophisticated malware using tools like IDA Pro, Ghidra, and x64dbg. * Have Experience in Reverse Unity, Cocos, Kony Android Apks * Debuggers, Disassemblers with Windows x86 and x64. * Creating Scripts/Plugins for Deobfuscation * Reversing iOS, Android Apps and Developing Tools to Automate * Server solutions (including serverless solutions) * interaction with BLE devices (BLE 4, BLE 5 Coded Phy) * Mobile apps Reverse Engineering (decompilation, creation of mods, API extraction, decryption) * Android APK patching and Binary Patching, Binary Decompilation * Root Detection and Emulator Detection Bypass * Network Traffic Analysis and Malware Analysis * Deobfuscation and Unpacking Applications * Web-Scraping/Crawling and Automation Expert * Browser Automation & Testing with Leverage Selenium, Multilogin, and Puppeteer * Data Analysis & Manipulation * Advanced Web Scraping Techniques external APIs, uncovering hidden functionalities and potential enhancements through reverse engineering.JavaC++CCryptographyPythonEthical HackingEmbedded CEncryptionSecurity EngineeringAssembly LanguageWeb Application SecurityPenetration TestingAndroid App DevelopmentAndroidReverse Engineering - $80 hourly
- 5.0/5
- (14 jobs)
Main Experiences; 1️⃣ OpenAI&VoiceAI Chat bot on telegram&discord 2️⃣ Solana, ETH, Base, Tron, BSC, Ton bot development, Snipe and Copy bots 3️⃣ Binance/Bybit/Bitget/Kucoin etc exchanges API integrations 4️⃣ Expert Telegram Bot development 🌱 I’m currently learning Microservice arc patterns, Failover scenarios, High load transaction management, and also Algorithms. Also working on Crypto platforms, bots, trading strategies, etc. 💬 Ask me about Java, TypeScript, Spring, Mongo, Hazelcast, Microservices ⚡ Fun fact I enjoy meeting new people, feel free to messageJavaMongoDBGitTypeScriptJavaScriptSpring DataMicroserviceAngularJSSpring BootDatabase Management SystemVersion ControlEngineering & ArchitectureAgile Software DevelopmentDistributed ComputingApache Kafka - $25 hourly
- 4.9/5
- (142 jobs)
I am a Computer Engineer. I have professional experience in the software industry. I have 10 years of experience about Designing and Building Wordpress Websites, Wordpress Configurations, Customizing Websites, Themes & Plugins and General Bugs. You can trust me in the following: Web Design and WordPress, React, Java, Html, Css, JavaScript, Php, SEO XD to Wordpress Figma to Wordpress PSD to Wordpress Please contact me, If you're saying things like followings; "I need a modern and useful website urgently." "I want to change the design of my Web Site." "I want to solve some problems on my website." I can fix almost any issue about Web Design and WordPress. Please let me to show you my professional software skills.JavajQueryReactWordPress PluginWordPress e-CommerceEcommerce WebsitePSD to WordPressWordPress DevelopmentWebsite OptimizationWebsite RedesignCSSWeb DesignWordPressHTMLJavaScript - $25 hourly
- 5.0/5
- (5 jobs)
“I’m a developer with experience in building mobile application for small and medium sized businesses. I’m experienced in Java, Kotlin, Flutter I’ll fully project manage your brief from start to finish Regular communication is really important to me, so let’s keep in touch!”JavaKotlinAndroid - $15 hourly
- 5.0/5
- (3 jobs)
Hello, I am Alper. I have about 3 years experiences about test environment. During 3 years, I have worked 2 different companies. At this companies I work on both mobile apps and websites. As a software test engineer, I have experience about manuel and automation testing. I joined upwork because I want to improve my skills and of course gain some money. I have 3 years of QA test engineering experience both of mobile apps and web testing. I am knowledgeable in UI tests (Visbug, Dev tools), API tests(Postman, Requestly), usability tests, automation tests(Selenium,Cypress), error reporting(Testrail), creating test scenarios and task management(Jira, Favro). I think in detail when creating test scenarios and I always include visuals and explanatory texts in my test reports. Throughout my work experience, I had responsibilities such as writing new test scenarios, keeping existing test scenarios updated, running load and stress tests, regression tests, reporting test results and opening tasks for errors found. I read your job post and I think I am suitable for this job. CERTIFICATES ● ISTQB Foundation Level - 10/2022 ● Test Engineering Course from WTECH - 05/2021 (100 hours) ● Test Automation Course from Wise Quarter (45 hours) ● API Testing and Karate Framework from Udemy - 03/2022 (20 hours) ● JMeter: Performance and Load Testing from Linkedin Learning FRAMEWORKS Selenium and Cypress for UI Automation Rest API for API automation Appium framework for mobile tests Postman and requestly for API testing Jmeter and locust for load and stress testingJavaPythonHTML5CSS 3CypressSeleniumAppiumAPI TestingManual TestingTest AutomationQuality AssuranceTest Development - $45 hourly
- 4.9/5
- (8 jobs)
Take a screenshot of your website. Remove the logo. Is it still uniquely your brand? If not, we have work to do... Using a user centered design approach and best practices I can help you build your website or web application in a timely manner. I have been involved in the world of web development and programming for more than six years. I have extensive knowledge of designing and developing sites from the ground up. My main goal is to create a product that satisfies your needs while providing you with efficient and open communication along the way. Building good relationships and the satisfying clientele is what drives me as I strive to be the best in my field as I can be. I am experienced in and excel at: • HTML5, • CSS3, • SCSS, • VueJS Even though I've built different types of websites, I mainly specialize in the following domains: • WebFlow, • Figma to HTML, • Pixel-Perfect Design, • Responsive Design, • API Integration, • Tailor-cut E-Commerce Websites Should you've questions, please feel free to contact me at any time. Looking forward to hearing from you!JavaWebsiteCSS 3HTML5Vue.jsPrometheusKubernetesDocker ComposeJavaScriptDockerElasticsearchWebflowLanding PageWeb DesignFigma - $50 hourly
- 5.0/5
- (3 jobs)
I have +20 years of professional experience and an MSc degree in Computer Engineering from the top university in Turkey. Currently continueing PhD. Expert in mobile software development, enterprise software development, web development, cloud, iot and microservices. I have built several mobile and web based platforms and IoT servers running in cloud as PaaS or using SaaS. I have also experience in Embedded Linux, kernel device driver development. I have built people finder service, vehicle tracking system, satellite navigation systems, location enabling server, GSM-R tools, mobile number portability platform, IPTV platform, service delivery platform, IMS platform, Vodafone etopup platform, revenue assurance system, CRM, customer provisioning & billing system, electronic cash register, battery management system, national ID card reader, fiscal sales platforms, IoT gateway, IoT devices etc. I have completed web based enterprise platforms used by millions of users deployed in core platforms in mobile operators. Technologies Used: Java SE, Java EE (JPA, EJB 3.0, JMS, JMX, JaxWS, CDI, JSF), Android, Ionic Framework, Electron Framework, Angular 5-9, C/C++, Embedded Linux, Yocto, Bitbake Spring Framework, Spring WS, Spring Security, Spring SAML, Spring Boot, Rest, Amazon AWS, Microsoft Azure Cloud Native Application Development Redis Cache, EHCache Apache Mina, Oracle 11g-12c, IBM Websphere, Oracle Weblogic, Rational ClearQuest and Clearcase, IBM Requisite Pro, HPQC, Gradle, Jenkins, Fusion Middleware, QT Deep product and technology expertise in wide range of areas such as Embedded Systems, Security VAS, CRM, BPM, Mobile, OSS/BSS, IN, ITIL - Common Criteria EAL Certification, Application Security Architectures - Architecture and development of custom software and hardware (POS applications, Linux drivers, Web based platforms, highly transactional IoT servers, Big Data and self service reporting eTOM – SID Expertise, Middleware, SOA Based and Micro services based design and developmentJavaAzure App ServiceReact NativeAngularJavaScriptRESTful APICore JavaC++Embedded SystemMicroserviceAWS ApplicationEmbedded LinuxSpring FrameworkSpring BootAndroid App Development - $60 hourly
- 5.0/5
- (1 job)
I’ve been working as a software engineer for almost 14 years. I developed enterprise applications in the financial services industry, mostly with Java(Spring,JEE) technology stack. I worked for big consultancy companies like Accenture and Ericsson. During my employment at Accenture, I had the opportunity to work with both onshore and offshore teams as a senior developer and team leader. I also worked on agile transformation projects at Akbank. Then, I worked as a senior consultant for several financial companies (banks and insurance comp.) to help them integrate with code quality and deployment automation tools and improve their SDLC processes. During my last employment, I worked as a team lead at a startup where I redesigned the core architecture in order to fix performance issues, reduce refactoring cost and improve user experience of the robo-advisor application. I developed back end services using Spring Framework. (Spring Boot, Spring Data, Spring Security, Spring MVC).JavaFlutterCouchbase ServerMicroserviceSpring MVCAPIRESTful APISwaggerPostgreSQLJavaScriptDockerSpring FrameworkHTML5AWS ApplicationSpring BootJenkins - $45 hourly
- 5.0/5
- (7 jobs)
- Developed Web projects - 3 year of Java development experience - 4+ years of PHP development experience as a freelancer - Highly Experienced with Spring Framework and Spring Ecosystem - Experience in the field of eCommerceJavaApache KafkaRESTful APIDockerSpring FrameworkAPIMongoDBJUnitSpring Boot - $50 hourly
- 5.0/5
- (3 jobs)
Full-stack developer with +7 years of experience in the mobile team of banking IT department. Looking to job which use React Native, Android, IOS and Spring Boot technologies. Strengths: -React Native to build Android and IOS mobile applications -Microservices and Spring Boot to create Rest APIs -Knowledge of Mssql and mysql for database -Knowledge of Git -High performance using optimal algorithms -Secure applications with multi-layer architecture -Simple and clean codeJavaSpring BootJavaScriptReact NativeMicrosoft SQL ServerAndroid App DevelopmentGitLinuxDockerJenkins - $40 hourly
- 4.9/5
- (15 jobs)
I'm Emre, experienced full-stack developer and digital artist. I have worked for IT and Advertising Industry for over 15 years. I've developed dozens of websites and managed many brand's social media. Skill sets : - React, Redux, Redux-Saga, Redux-Thunk, Flux, MobX, Firebase, GraphQL - Node.js frameworks (Express.js, Hapi.js, Koa.js, Meteor.js, Socket.io) - JQuery/Bootstrap/HTML5/CSS3/SASS/LESS/SCSS - Embedded Software Development (Raspberry Pi) - Python/Flask/Django and Java/Spring framework - Database : MySQL, MongoDB, PostgreSQL, NoSQL - Service : Azure, AWS EC2, S3 bucket/RDS and Lambda Benefit - Project structure in the best practice - High Quality & Continuous Support - 24/7 Available Keep long term engagement with clients by satisfying their requirements and showing flexibility is my main goal.JavaExpressJSNode.jsMySQLMongoDBReactPythonGraphQLFlask - $35 hourly
- 4.9/5
- (9 jobs)
Backend and frontend Java developer for over 10 years. My core competencies are: • Java backend development (Spring, JavaEE, JPA/Hibernate, REST API, WebSockets) • Frontend web development (JavaScript, HTML, CSS, JSP, GWT) • Multi-platform game development (LibGDX, AndroidSDK, RoboVM, GLSL) • Desktop application development (JavaFX) • Along with solid expertise in: Git, Gradle, MySQL, Linux, nginx I have a lot of experience both in teamwork and in independently building projects from the ground up. I am dedicated to developing a versatile skill set, which enables me to solve issues of any complexity across different technologies. I’m always open to discussing your needs and ideas, feel free to reach out anytime!JavaGame DevelopmentlibGDXCSSHTMLJavaScriptJavaFXWebsocketsRESTful APISpring Framework - $100 hourly
- 4.7/5
- (23 jobs)
Skills - Java11 - Spring boot - Spring batch - SOLID principles - Design patterns - 8 years of full-time back-end engineer Education - Phd. candidate in Computer Engineering - MSc. in Computer Engineering - BSc. in Computer Engineering - BSc. in Electrical&Electronics EngineeringJavaSwaggerRESTful APISpring BootDesktop ApplicationAPISpring Framework - $44 hourly
- 5.0/5
- (6 jobs)
I have understanding of many technical subjects. I am a software developer who loves coding, learning new technologies, improving myself and researching. I have experience with working in international companies and distributed teams. I am working in the role of Full Stack Developer, with emphasis on Backend. I mostly develop applications with using Java, Spring Boot, .Net Core, Nodejs, Javascript, Postresql and nosql products. Advanced Proficiency in English.JavaSEO WritingTechnical WritingArticle WritingNodeJS Framework.NET CoreSpring FrameworkSpring BootASP.NET Web APIASP.NET MVCMongoDBC#SQLJavaScriptNode.js - $40 hourly
- 4.8/5
- (40 jobs)
I am a software engineer and have been developing web applications since 2015. After working as a full stack web developer in web2 projects for a while, I started working in web3 / blockchain development and continue improving in this field. I have been working full-time in silicon valley for 4 years as a web3 / blockchain developer.(Currently SnickerDoodle Labs)JavaCybersecurity ManagementVirus RemovalTurkishContent WritingWordPress DevelopmentMobile App DevelopmentWordPress ThemeWeb DesignSearch Engine OptimizationCSSPHPJavaScriptHTML - $33 hourly
- 5.0/5
- (2 jobs)
Full-stack software developer with 15+ years' experience, design acumen, and a keen eye for UX and simplicity. Proven track record in getting things done. Specialize in web and mobile apps. Proficient in AWS, G Cloud, React, Java and more. Diverse project background. Highlighted achievements from my resume include: 1. Spearheaded the development of an EV-charging SaaS platform. 2. Orchestrated the migration of PL/SQL business logic to Spring Boot microservices at Allianz. 3. Pioneered the creation of a cutting-edge eCommerce recommendation system. 4. Elevated customer satisfaction with innovative design on a municipality helpline software. 5. Developed a reputation management web app utilizing G Cloud, Quarkus, Vue.js, and Firebase.JavaMobile AppWeb ApplicationJavaScriptScalaAgile Project ManagementImplementation PlanMinimum Viable ProductDesign ThinkingBasecampPrototyping - $40 hourly
- 5.0/5
- (20 jobs)
Hello! I am İbrahim, Computer Engineer who is open for full-stack development. My expertise is in the Laravel framework and WordPress. I am always fast, positive, energetic, adaptive, funny, and a person who practically solves problems.JavaWeb DesignLaravelChart.jsHTTPAndroidDjangoFlaskPlugin DevelopmentPHPHTMLWordPressJavaScriptCSSPython - $40 hourly
- 5.0/5
- (5 jobs)
I am a senior software engineer with end-to-end web and mobile application development experience. I have more than 10 years of experience. - Java, Flutter/Dart, Python, Angular, SQL, PL/SQL - Oracle, Microsoft SQLServer, PostgreSQL, MySQL - MongoDB, Cassandra, Elasticsearch, Redis - DevOps, Docker, Kubernetes, Jenkins, GitHub Actions, Linux, AWS, Azure - Microservices, RestApi, WebSocket, Keycloak, S3, MinIO - Machine Learning, NLPJavaMongoDBWeb DevelopmentTypeScriptLinuxDartOracle PLSQLAngularDockerSpring BootApache KafkaFlutterKubernetesJenkinsSQL - $50 hourly
- 5.0/5
- (11 jobs)
Accomplished Senior Software Developer with 12 years experience leading projects by acting as architect, developer and programmer analyst. Proficient in supporting project deliverables and maintaining releases. Strong leader in guiding support teams and solving complex issues. Steadfast in planning and implementing effective development strategies based on industry best practices.JavaDevOpsContainerization.NET CoreTerraformLinuxCI/CDAmazon Web ServicesGitKubernetesC#AnsibleDocker - $50 hourly
- 4.5/5
- (4 jobs)
Seasoned software engineer and engineering tech lead with a wide range of experiences across multiple industries, including Banking, Financials, Logistics, and Telecom. - Proficient in Java ecosystem, mainly focused on Spring and J2EE. - Participated in monolith and microservices design styles. - Working knowledge of DevOps toolchain (Maven, Git, Jira, Gitlab/Github) - Extensive experience in database and data-related operations (SQL, ETL, visualization) - I can help clients to maintain and improve legacy systems. Have the privilege of being one of the top 6% worldwide contributors to the StackOverflow community with a (7K+) reputation.JavaSoftware DebuggingJavaScriptWeb DevelopmentSOAPKubernetesDockerFull-Stack DevelopmentMicroserviceSpring BootDatabase DesignPostgreSQLOracle DatabaseRESTful APISQL - $70 hourly
- 5.0/5
- (8 jobs)
Experienced software engineer and software architect. Has successfully completed numerous enterprise projects on banking, insurance and telecom. Bachelor's : Computer Engineering - Ege University Master's : Engineering Management - Bahcesehir University Skills: Software Engineering, Software Architecture Design, Object Oriented Design, Enterprise Architecture Frameworks, APIs, Microservices and Containerization. Specialties: Digital Banking, Banking and Insurance Transformation Projects, Large Scale Software Design & Development, Domain Modeling, SOA. Technologies: Java, Spring, Hibernate, JPA, JSF, NodeJS, Bootstrap, Typescript, AngularJS, ExpressJS, Rest, Microservices, SOA, Webservices, Oracle, MongoDB, Redis, Junit, DBunit, Maven, Gradle, Svn, Git, Jenkins, Jira, AWS, Docker, Kubernetes, Apache KafkaJavaMongoDBOracle DatabaseWeb ServiceHibernateSpring FrameworkAngularJSSpring BootTypeScript - $75 hourly
- 5.0/5
- (3 jobs)
I am working as Senior software developer for a leading e-commerce site in turkey for 5 years.I asses feasibility of features, make estimation and implementations.I monitor and maintain our applications in production environment. I am already experienced java developer and using microservice architecture for many years.JavaApache KafkaMySQLMongoDBHibernateKubernetesPostgreSQLSpring FrameworkDockerMicroservice - $50 hourly
- 5.0/5
- (58 jobs)
Native Android Developer | Java & Kotlin 🚀 Top Rated Plus 💯 100% Job Success Score 8+ years of experience working on native Android applications for high profile clients and businesses. I've strong Java/Kotlin programming skills including low-level performance optimizations and memory management. ✔ Ml-kit, OpenCv, TensorFlow, Camera, Image Processing ✔ Clean Architecture, MVVM, Firebase, Coroutines, Live data, DataBinding, Dagger2/Hilt, Room, Retrofit, Glide, Payments 🚀 Why Choose Me? 8+ Years of Servicing High-Profile Clients Strong Java/Kotlin Programming Skills Developer with a Keen Eye on Technological Advancements Detail-Oriented and Timely DeliveriesJavaAndroid AppAndroid StudioNative App DevelopmentFirebaseAndroid App DevelopmentKotlinAndroidMobile App DevelopmentSQLiteCamera OperationNFCMobile AppAndroid SDKOpenCV Want to browse more freelancers?
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