Hire the best Java developers
Check out Java developers with the skills you need for your next job.
- $50 hourly
- 5.0/5
- (118 jobs)
My name is Saul Hidalgo, a Computer Engineer with a passion for developing Java and .Net software. I have been fortunate to work with exceptional teams and have had the opportunity to contribute to various sectors, including National Security/Defense in the United Kingdom, Oil companies, and Universities such as Harvard Business Publishing. The software I have created is currently being successfully utilized by these organizations. I thrive on new challenges and continuously seek opportunities to expand my skills. You can explore my public contributions on my GitHub account: saulhidalgoaular. Below are my areas of expertise and skills: 1. Code Translation and Conversion: - Proficient in translating code across various languages, with expertise in Python, Java, Delphi, C++, and C#. 2. Document Management System (DMS) - OpenKM: - Extensive experience in developing workflows, automations, cron tasks, and integrations using the Java/PHP API. - Configuration of daily backups. - Skilled in utilizing OpenKM as a DMS. 3. Algorithms and Programming: - Strong command over algorithms and programming skills, particularly in C/C++ and Java. - In-depth knowledge of data structures, strings, sorting, arithmetic and algebra, combinatorics, number theory, backtracking, graph traversal, algorithms for graphs, dynamic programming, and computational geometry. 4. Accounting: - Well-versed in managing material movement between stores and shops. - Proficient in handling retail-related accounting tasks. 5. Point of Sale (POS) Area: - Experience in integrating POS software with label printers, fiscal printers, barcode readers, fingerprint scanners, and keyboards.Java
Core JavaMicrosoft ExcelDocument Management SystemAPIAlgorithm DevelopmentData StructuresAPI DevelopmentHibernateObject-Oriented Programming.NET FrameworkMySQLDesktop ApplicationC++ - $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 DeliveriesJava
Android AppAndroid StudioNative App DevelopmentFirebaseAndroid App DevelopmentKotlinAndroidMobile App DevelopmentSQLiteCamera OperationNFCMobile AppAndroid SDKOpenCV - $100 hourly
- 5.0/5
- (6 jobs)
I am a software engineer with 20 years of experience in multiple industry. I am a very passionate and an excellent problem solver. I work with Java 11 using Spring, Elastic Search, Jersey, Hibernate, Postresql , Mysql and ActiveMQ. I also have a lot of experience in AWS services such as Cloudformation, DynamoDB, Lambda, SQS , RDS. I have the AWS developer associate certification.Java
PostgreSQL ProgrammingLinux System AdministrationApache ActiveMQAmazon Elastic BeanstalkAWS LambdaHibernateOracle DatabaseDockerRESTful API - $40 hourly
- 5.0/5
- (10 jobs)
Creative back-end developer dedicated to building elegant solutions that meet business demands. Over 10 years of experience developing software of different scales ranging from small startups to large enterprise applications. Implemented back-end as well as front-end with the main focus on the former. Good communication skills proven through work experience in distributed team projects. 𝗕𝗮𝗰𝗸-𝗘𝗻𝗱 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Java, Kotlin JavaEE, Spring, Guice JDBC, JPA, Hibernate JUnit, Mockito, Cucumber, FitNesse Maven, Ant Git, SVN Jenkins, Sonar TypeScript, JavaScript Node.js Jest Webpack 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀: MySQL, MariaDB, Oracle MongoDB, AWS DynamoDB 𝗖𝗹𝗼𝘂𝗱 𝗣𝗿𝗼𝘃𝗶𝗱𝗲𝗿𝘀: Amazon Web Services 𝗦𝗲𝗮𝗿𝗰𝗵 𝗘𝗻𝗴𝗶𝗻𝗲𝘀: Solr, AWS Elasticsearch 𝗙𝗿𝗼𝗻𝘁-𝗘𝗻𝗱 𝘁𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀: Vue HTML, CSS, Bootstrap Should you need any further information, please do not hesitate to contact me.Java
Distributed ComputingNode.jsMicroserviceAmazon Web ServicesNoSQL DatabaseSpring FrameworkTypeScriptJavaScriptSQLMongoDB - $75 hourly
- 4.9/5
- (62 jobs)
I am a professional software developer with 25 years of experience. I focus on mobile app development for Android and iOS, web development, and cloud services. Throughout my career I have gained experience in many different technologies, from modern cloud, mobile, and web development architectures all the way back to mainframe systems. My app development experience includes location services, map integration, user authentication and user profile management, payment functionality, media playback including both audio and video, and in-app purchases. I can work with many services available from Amazon Web Services (AWS) and Google Cloud Platform (GCP). I am committed to producing a quality product. I always stand behind my work and communicate as much as I can. The more my client and I both know about what is being done, the happier everyone is.Java
ChatGPTGoogle Cloud PlatformUser Profile CreationLocation-Based ServiceFirebaseAmazon Web ServicesNode.jsKotlinSwiftiOS DevelopmentiOSAndroid App DevelopmentAndroidMobile App Development - $20 hourly
- 4.9/5
- (52 jobs)
🌟 Top-Rated Upwork Professional 🧑🏻💻 9+ years of experience 📱 Android | Kotlin | Java | Jetpack Compose | Kotlin-Multiplatform| Flutter | WearOS | AndroidTV | 🚀 AI | ChatGPT | 💻 Firebase | VoIP | Linphone With over 9 years of extensive experience as an Android Developer, I specialize in native Android application programming with a strong focus on SCRUM/Agile workflow. I have a proven track record of delivering high-quality mobile applications in various domains, including: * Airline Domain * Banking Domain * Cargo Management Domain * Logistics Domain * Financial Domain * Social Media/Dating Domain with Video/Audio Chats * Location Tracking Domain My expertise in mobile development includes: * Programming Languages: Java, Kotlin * Architectural Patterns: MVVM, MVP, MVC * Design Patterns, Custom Controls, and REST API integration * Material Design, Mobile UI/UX, and Firebase integration (AdMob, Analytics, A/B testing, etc.) * Jetpack Compose, Jetpack Navigation * Firebase Realtime Database and Storage * Android SDK, NDK, Open Source, Support Libraries * Reactive Programming with rxJava and rxAndroid * Dependency Injection using Dagger, Kodein, and Hilt * Databases: SQLite, Room, Realm, Page * Network Libraries: Retrofit, OkHttp, Volley, ktor * Image Loading Libraries: Picasso, Glide * Crash Reporting and Analytics Tools: Crashlytics, Firebase, Fabric, LeakCanary, Timber * Other Libraries: Gson, AutoValue, JodaTime, AndroidJob, Google Services * Sockets/SignalR * Kiosk Mode * SonarQube code coverage * Kotlin-Multiplatform (One POC) * Wear OS & Smartwatch development * Mqtt In addition, I am an expert in the Linphone SDK, a powerful tool for building voice and video communication applications. I have in-depth knowledge of integrating and customising the Linphone SDK to create high-quality, real-time voice and video chat functionalities within Android applications. I am experienced in implementing Linphone's advanced features, including call management, audio/video codecs, encryption, push notifications, and more. Whether you need to develop a VoIP application from scratch or enhance an existing app with Linphone capabilities, I can provide the expertise you require. I have integrated various features and technologies into Android applications, including: * Beacons integration for proximity-based interactions * Calendar API integration for managing events and schedules * QR Code integration for scanning and processing QR codes * OCR (Optical Character Recognition) integration for text recognition and extraction For multimedia capabilities, I have integrated Video Chat using WebRTC, ZegoClould, Twilio, and Agora, as well as Audio Streaming. I am familiar with ExoPlayer for HLS Video Streaming (HTTP Video Streaming), RTSP Video Streaming, and DASH Video Streaming. Other skills and features I offer include Custom Calendar development, Media Gallery implementation, Background Download and Upload functionality, Tiff file format handling in Android, Live Streaming using Agora and ZegoCloud SDK, Deep Linking, LeakCanary for memory leak detection, and code annotations to improve the linting process. Experienced Kotlin Multiplatform Developer with a track record of delivering efficient cross-platform solutions. Proficient in Kotlin Multiplatform Mobile (KMM) and skilled in creating high-performance apps for Android, iOS, web, and more. Experienced Jetpack Compose Developer, proficient in creating dynamic, interactive, and modern Android UIs. Skilled in leveraging Jetpack Compose's power to build visually stunning and responsive applications. Over the years, I have developed many different types of iPhone and Android apps. These include: - Food delivery apps - On-demand apps - Home services apps - Handy man apps - Salon apps - Beauty apps - Taxi apps - Ride apps - E-commerce apps - Dating apps - Health and fitness apps - Travel apps - Video streaming apps - Fintech apps - Shopping apps - Telemedicine apps - Finance apps - Real estate apps - Social media apps - Chat apps - Business apps - Messaging apps - Online courses apps - Online education learning apps - Tutor apps - Hotel booking apps - Online grocery order apps - Telecommunication apps - VoIP apps - SIP Apps - Apps using the Twilio API I am fluent in English and passionate about Android development. Please feel free to reach out to me with any Android-related questions or projects. I would be pleased to help you bring your ideas to life.Java
Mobile Device Management SoftwareAOSPSmartphoneiOS DevelopmentUser AuthenticationAndroidJetPackMobile App DevelopmentWear OSIn-App PurchasesVoIPFirebaseAndroid App DevelopmentKotlin - $20 hourly
- 5.0/5
- (1 job)
I'm java full-stack developer with 4 years of experience. What I like most about programming is being able to provide solutions to seemingly complicated problems. Also, I am passionate about learning new technologies. I have experience working with technologies such as Java, angular , react, css, JS.Java
Node.jsTypeScriptJestReduxStorybookReact BootstrapFront-End DevelopmentReactBootstrapCSSJavaScriptHTML - $40 hourly
- 5.0/5
- (16 jobs)
Hello, I am Tarik Mujčić, a Full-Stack Software Developer with a strong focus on Java and Angular. Got a challenge ❓ I've got the solution ✅ I specialize in developing, fixing, optimizing, and delivering high-quality software solutions that streamline processes, enhance user experience, and provide reliable results. My goal is to create software that is both robust and user-friendly, effectively meeting your business needs with efficiency and precision. I am committed to delivering solutions on time ⌛, ensuring your project stays on track and achieves success 🎯 Skills and technologies I'm proficient at: ✅ Java/JEE, JavaFX ✅ Spring (MVC, AOP, Data, Security, Reactive...), Spring Boot ✅ Maven, Gradle ✅ JDBC, Hibernate ✅ TypeScript, Angular, HTML, CSS ✅ Database design and implementation ✅ PostgreSQL, MySQL, MSSQL, OracleSQL ✅ CI/CD tools (Jenkins, Nexus, GitHub actions, GitLab pipelines) ✅ Unit & Integration testing (JUnit, Mockito, Jasmine,...) ✅ REST APIs Feel free to reach out if you have any questions or would like to discuss how I can help with your project. I look forward to collaborating with you!Java
CSSHTMLAPI DevelopmentAngularCDatabase Management SystemHibernateDesktop ApplicationRESTful APISpring BootDatabaseRESTful ArchitectureMySQLPostgreSQL - $75 hourly
- 5.0/5
- (49 jobs)
I am a highly experienced Java developer with 20 years of industry experience and I have been specializing in implementations using Adobe Experience Manager (AEM) for the past 9 years. I've built solutions in AEM 6.1 - 6.5 and AEMaaCS. In 2018, I was one of the winners of the Adobe Immerse 2018 Community Code Contest, as well as a presenter at the Adobe Immerse virtual conference, leading a discussion on Creating Custom ContextHub Stores and UI Modules in AEM. I have also contributed to ACS AEM Commons (the main AEM open source project) by helping to build Shared Component Properties. I also have solid experience working with various JavaScript frameworks like jQuery and VueJS and the drive to pickup new ones when necessary. I am also familiar with Less, SCSS, and CSS and the concepts of building responsive sites using Bootstrap and AEM Grid. I strive to write clear and maintainable code, and fully document my code to ensure future developers have a clear understanding of all methods and classes. Also, I will gladly provide any additional documentation or training materials requested, which will be well structured and well written. I am a strong problem solver and skilled at exploring and debugging complex problems to get software applications back on track when strange errors or edge case scenarios arise.Java
NodeJS FrameworkAdobe Experience ManagerVue.jsSpring FrameworkCSSJavaScriptJakarta Server PagesHTMLJava Servlet APIjQuery - $40 hourly
- 5.0/5
- (16 jobs)
Experienced Senior Data Engineer | AWS, Big Data, and Cloud Solutions Specialist With over 8 years of experience as a Senior Data Engineer, I specialize in designing and implementing scalable data solutions across cloud platforms such as AWS and GCP. I have a proven track record in optimizing complex data pipelines, schema enforcement, and managing large-scale ETL processes. Skilled in Clickhouse, AWS Glue, Athena, Lambda, BigQuery, and Snowflake, I bring expertise in data architecture, cost reduction, and workflow automation. I'm passionate about delivering data-driven insights and leveraging cloud technologies to streamline processes for businesses. Let's collaborate to build efficient, scalable, and cost-effective data solutions!Java
GISParquetClickHouseSnowflakeData Warehousing & ETL SoftwareAWS LambdaAWS GlueData ScienceAPI IntegrationMachine LearningSQLJavaScriptPython - $49 hourly
- 5.0/5
- (13 jobs)
✨ Algorithm & Software Engineering Expert | OR & ML Specialist ✨ * Highlights & Achievements: • ICPC World Finals 2022 Competitor — Ranked in the top 2% out of 58,000+ global contestants. • Codeforces Master (Top 1%) — Maximum rating 2221, consistently solving complex algorithmic challenges. • 10–15% Profit Boost — Optimized airline scheduling with metaheuristics (Genetic Algorithms, Local Search). • 2nd Place in Huawei Challenge Hackathon — Engineered high-performance algorithms under tight deadlines. * What I Offer: • Advanced Algorithms & Optimization: Deliver efficient, scalable solutions using heuristics, metaheuristics, and classical OR techniques (e.g., LP/IP, Graph Theory). • Machine Learning & Data Science: Proficient in Python, TensorFlow, and PyTorch, turning raw data into actionable insights. • Clean, Maintainable Code: Rigorous coding practices (version control, testing, CI/CD) for reliable, future-proof software. • Problem Solving & Collaboration: Translate ambiguous requirements into tangible solutions—fast turnaround, thorough communication. * Education & Background: • B.Sc. in Computer Science (Data Science focus) — Innopolis University. • Hands-On R&D experience at Optifly (airline scheduling software) and Huawei (reinforcement learning framework). I’m here to help you tackle complex projects, streamline operations, and push your product to the next level. Ready to collaborate? Let’s turn your ambitious ideas into outstanding results!Java
MetaTrader 5Operations ResearchComputer ScienceHeuristic EvaluationPerformance OptimizationAlgorithm DevelopmentLinear ProgrammingMathematical OptimizationData StructuresC++Python - $30 hourly
- 5.0/5
- (2 jobs)
10+ Skills | 15+ Years experience in Engineering field Android, Java/Kotlin/Python/C/SQL, UI/UX, Git, GitHub/GitLab/Bitbucket, Android Studio/IntelliJ IDEA/Eclipse, Trello/GitLab board, SOLID Firebase, Bluetooth and much more - developing projects from scratch (setup, architecture, features development) - deveopment for embended devices - support legacy projects - integration of new technologies - working with Google guidelines I can just do any job for you, no matter how difficult the task you describe I doJava
FirebaseCoroutineRetrofitAndroid StudioSQLiteKotlinAndroid App DevelopmentMobile UI Design - $105 hourly
- 4.7/5
- (733 jobs)
** HubSpot Design Certified ** Recently recognized as a HubSpot Champion User Worked on many different types of applications and with many different technologies. Quickly learn new programming languages and technologies. Can also read and understand existing code to find and fix bugs. Have 26 years experience in IT. Have a Bachelors Degree in Math as well as an MBA. I have worked with many programming languages including COBOL, Visual Basic, C, C++ and Java. Currently working on projects utilizing Angular, JQuery, Java Script, CSS, HTML5, Hubspot and Flex. I am familiar with content management systems. I have worked on front end designs/pages and back end services. Have done responsive development, desktop applications, and mobile applications.Java
CSSHTMLContent Management SystemHubSpotCMS DevelopmentWebsite CustomizationAgile Software DevelopmentBlog DevelopmentInbound MarketingTemplatesBusiness with 100-999 EmployeesiOS DevelopmentAndroid App DevelopmentJavaScript - $35 hourly
- 5.0/5
- (13 jobs)
ON TIME, ON BUDGET, HIGH QUALITY APPS Almost any app you need I can create it, fix it, improve it for you. Good Communication, easy to work with, enthusiastic, perfectionist. 5+ years of experience Prototyping & Concept Development Worked in complex apps fixing bugs, cleaning the code, etc. SDK NDK JAVA C Image Processing Photo Editor Games Camera AdMob Algorithms Optimization for speed and small apk size ETC. Attention to detail PerfectionistJava
JetPackChromiumAndroid AppAndroid NDKAndroid SDKKotlinCBluetoothAndroidIn-App PurchasesSoftware Architecture & DesignAndroid StudioLinux - $120 hourly
- 4.9/5
- (10 jobs)
10 years of experience working on native Android applications for high profile clients and businesses. 100% Job Success | 11,000+ Hours | Top Rated Plus | 5 Star Reviews Exclusively From planning, developing and publishing to maintaining and supporting high quality Android applications. I hope you see the experience displayed in my profile as an indication of my reliability. ✔︎ Constantly updating my knowledge with the most recent design patterns and code conventions; ✔︎ The delivery of a product that respects the highest standards of usability, performance and appearance is guaranteed; ✔︎ Great cost-benefit by delivering faster and higher quality products than the average; ✔︎ Flexible availability to always meet the client's needs. Vast experience managing development teams located in different places around the world. As an example, I've been managing a team that averaged 7 developers located in different countries, such as Canada, Ukraine, Pakistan, India and Brazil. ✅ Mobile Development Leader; ✅ Native Development; ✅ Kotlin and Java Expert; ✅ Clean code, DRY and KISS principles; ✅ Unit and automated testing; ✅ Well documented code; ✅ UI/UX Best Practices; ✅ NoSQL and SQL Databases; ✅ API Integration; ✅ Web Services Development. MySQL, SQLite, PostgreSQL, SQL Server, Firebase, Java, Kotlin, Android Studio, Android SDK, Android NDK, Device Owner, Play Store...Java
RESTful ArchitectureAndroidMySQL ProgrammingMaterial DesignAndroid SDKSQLitePHPFirebase Cloud Firestore - $46 hourly
- 5.0/5
- (4 jobs)
I am a tech enthusiast and Software Engineer with +7 years of experience in several fields. - Front-end experience: Flutter - Back-end experience: Firebase, Java, Node.js, C#, Ruby on Rails I am the co-founder of a Flutter Agency (SmartUp Software) in which we provide custom software development and staff augmentation services, having developed and deployed 10+ apps/webs. I developed an award-winning social project called "Berrinche" whose main purpose is to help parents and therapists of those with ASD to discover the causes of disruptive conduct and how to treat them.Java
pandasMicrosoft Power BIPythonDartIn-App SearchNode.jsRuby on RailsCSSHTMLC#AndroidAngularJavaScriptFlutter - $25 hourly
- 5.0/5
- (5 jobs)
I have 6 years of working experience in the software industry, and I am confident most as a Backend Developer and Data Engineer. For now, I want to spend more time on the freelance path, to help others solve their problem happily. As a backend developer: - I build microservices using Java and Go - I design a Database schema for features I work on. - I write REST API and work with the frontend team for integration. As a data engineer: - I do ETL tasks. - I write batch jobs and real-time jobs for streaming over 50 GB of data per day. - I store processing data into HBase, MySQL. - I visualize data to make it meaningful to others. Besides, I also spend time playing with frontend stuff such as NextJS, VueJS, CSS. Availability: My time zone is GMT+7, but I am flexible on working time, even at midnight. If you want to work with me for more than 30 hours, just say it, I will consider working more. Let’s work together to turn your idea into reality!Java
RESTful APIDatabaseDatabase ArchitectureGitApache KafkaSpring FrameworkApache SparkPostgreSQLGolangScalaJavaScriptPythonRedis - $25 hourly
- 5.0/5
- (2 jobs)
I am having 6+ year of hands on experience on working with both frontend, backend technologies and complete Software Development Life Cycle. I have worked with various technologies to develop web , desktop solutions and live streaming of data. I have specialised in developing rich web applications in J2EE using hibernate and spring framework,I'm even experienced in open source software solution like Dspace (Use digitalis document) and Vufind there installation,customization etc Experience with dspace like -DSpace Domain Knowledge -Dspace Installation on cross platforms. For frontend, I have hands-on experience on 1)Bootstrap, 2)Javascript, 3)Jquery, 4)HTML5, 5)CSS3, 6)AngularJS 7)Jquery Mobile 8)Angular For backend, I have hands-on experience on 1)Java 2J2EE 3)Hibernet 4)Spring 5)Maven 6)Ant 7)Nodejs 8)Socket.io 9)Express For Source Control, I am familiar with SVN and GIT. I have experience on working with any third party API integration using XML, SOAP, JSON and JSONP. I am hardworking and passionate for my work. I always strive to surpass customers expectations, providing highest quality solutions within budget and the allocated timeline.Java
MQTTDICOMMedical ImagingLinux System AdministrationSocket.ioSpring BootSpring FrameworkjQueryHibernateReactAngularNode.js - $50 hourly
- 5.0/5
- (28 jobs)
I'm a full stack software developer with experience in Java and Android projects. I focus on service and delivering the best experience to my clients, while providing quality software on a timely fashion. I have experience with various technologies to help fulfill any kind of job. I'm also open to having a chat with my customers, if they so desire, so we can arrange any details about the job. I also have experience with Cyclos Banking System Software, providing consultant services to small-medium banks. I've done several integrations with 3rd parties software with it, also developed plenty of aditional feature for it too, like bank statements and import of payments. I have experience on the following languages and technologies: -Java: Everything enterprise, Servlets, JSF, Primefaces and JPA. -JavaScript: pure Script, NodeJS and AngularJS. -PostgreSQL, SQLServer, SQLLite I also have experience providing products and solutions for financial institutions. My biggest desire is to serve my customers as if it was me requesting the product, I always strive to deliver the best software since I wouldn't settle for less.Java
Email Campaign SetupJ2EEAndroid App DevelopmentMicrosoft SQL Server ProgrammingAPI DevelopmentMySQL ProgrammingJava Servlet APIJavaScript - $70 hourly
- 5.0/5
- (13 jobs)
★ Product owner of StatHero(iOS and Android apps, Angular web app), with thousands of daily active users ★ Created the StoryChimes brand (mobile app on iOS and Android), achieving over 7 million downloads ★ Created mobile apps based on the Lennon/McCartney catalog with Sony/ATV Music Publishing ★ Released key music apps for Imagine Dragons, R5, and LeAnn Rimes ★ Released several games that achieved over 10 million downloads ★ Led the development of over 200 mobile apps (iOS and Android) and 100 websites ★ Led the development of numerous blockchain projects, including crypto launchpads, NFT marketplaces, decentralized exchanges (DEX), wallets, GameFi platforms, and metaverse developments ★ Led the development of over ten early-stage AI startup projects ★ Third-party clients included Intel, Crispin Porter + Bogusky, Samsung, and HarperCollins Hello, I'm Nick, the wizard behind the curtain at several software development companies. With a wand made of code in one hand and fifteen years of magic tricks up my sleeve, I lead a troupe of highly skilled digital artisans. 🙌 Wondering how one person can be a specialist in mobile, web, game, AI, and blockchain development? Well, you learn a few spells when you've been around the tech block as long as I have. 🧙♂️ As the product owner and head wizard at StatHero, a leading disruptor in the daily fantasy sports space for real cash gaming, I've grown the company into a multi-million dollar business. 💰 But what truly sets me apart is my unwavering optimism and knack for finding solutions where others see dead ends. No matter the challenge, I see it as another opportunity to innovate and excel. 😉 I believe in the power of team magic. Alone, one might not change the world, but with a dev force like ours, we're not just making apps; we're making history. Need a software solution? Just say the word, and my team will bring your vision to life - like pulling a rabbit out of a hat! 🎩 Bonus Profile: My Life Before Code 🎁 Before I dove into the digital world, my creative energies found their outlet in other forms. I wrote and produced a film titled The Cook in 2008, exploring storytelling through cinema. Even earlier, for thirteen years, I played the trumpet, embracing the world of music and performance. For 18 years, as an executive at two Hollywood studios and working in music, these experiences shaped my understanding of teamwork, creativity, and perseverance, enriching my approach to technology and leadership.Java
Game DevelopmentWeb DevelopmentBlockchain DevelopmentiOS DevelopmentFlutterSwiftAngularReact NativeAndroid App DevelopmentKotlinJavaScriptPHPMobile App DevelopmentReact - $45 hourly
- 4.4/5
- (30 jobs)
I am a Java Web Developer, working as freelancer, mainly in Upwork. I am very passionate with Java and JVM technologies. My experience mostly in developing Software As A Service (SaaS) platform, business computing and information system area, using Bootstrap, Angular JS or JSF as UI Components or web framework, Spring Core, Spring MVC or JBoss Seam as Restful API endpoint and or Integration framework, and Hibernate as favorite Java Persistence API (JPA) implementation wrapped by Spring Data component. If my clients requires no casual application or web server, I like to use Spring Boot for simpler development and deployment of the application. I am also interested in database design and software design. I believe that great software not only mediocre work of typing, but also comes from thoughtful process. I believe in TDD, and also believe that tests code must be written, organized as good as the source code it self and is integral part of the source code. I am a quick learner, and In my spare-time, I am writing some personal open source project and small proof-of-concept about java-related stuff in my GitHub public repository. My primary machine is linux desktop with 1TB NVMe SSD and 64GB or RAM. I have macbook pro 15 for testing purpose and to allow me mobile occasionally, if needed. Communication is important in remote work, and for this purpose I have 2 link dedicated internet connections to my workspace. If you need my detailed skill abilities, below is what I have experienced in: - Software Design, Database Design, and microservices/Micro-services/micro services architecture. - JPA 1.0, JPA 2.0, with Hibernate. - Bean Validation Specification with Hibernate Validator. - Dependency Injection with Java DI (JSR-330), Java Context and Dependency Injection for Java EE Platform (JSR-299), and Spring Core as most popular (but non-standard) Java Dependency Injection Framework. - Java Web Framework with Spring MVC and JSP, or Java Server Faces (JSF) with Facelet and Primefaces. - Spring Boot, Spring Data stack. - Generated / scaffolding web application using JHipster. - Java Web / Application server with Tomcat, Wildfly, or Websphere AS. - Logging with SLF4J as a wrapper to Log4J or Logback. - JUnit or Test NG as testing framework. - Ant, Maven or Gradle as build and dependency management tool. - HTML 5, CSS 3, JavaScript, JQuery, Twitter Bootstrap, transparency.js, and angular / angular.js - Third Party API such as Xero API, Open ERP Java API, Braintree Payment API, Stripe Payment API, and Social APIs. - Linux, Mac or Windows. - MySQL, PostgreSQL, Oracle, or Microsoft SQL Server for RDBMS. - Couchbase or Mongo DB for No-SQL solution. - Elasticsearch (ELK) stack or pentaho for data integration, advanced search, reporting and data analysis solution. Thanks, ResaJava
Spring FrameworkAngularSpring DataDigitalOceanSpring BootHibernateJHipsterJava Persistence APIAmazon Web ServicesWeb ServiceSQLJavaScript - $50 hourly
- 5.0/5
- (27 jobs)
I’m a programmer with more than 10 years of experience who can work in different programming langauges using different frameworks. I can create any application type: ● web based ● desktop If I don’t know any programming language or framework which you want to use to build your application then I can learn it in couple days. SKILLS ● PHP ● Javascript ● jQuery ● Bootstrap ● AJAX ● MySQL/PostgreSQL ● REST API ● HTML/HTML5 ● CSS/CSS3 ● C/C++ ● Ruby (and framework Ruby On Rails) ● Python ● Java ● CUDA Computation ● OCR (on C/C++, Python, Java) EXPERINCE ● Freelance 5+ years (up to July 2014). I was working hard to learn what clients want to see, to learn different programming languages and frameworks. Those years taught me to learn new things everyday to provide high-quality solutions for my client. Here's some of my works (PHP, MySQL, HTML, CSS, JavaScript): ○ dev.louepartout.com ○ kilosolution.com ● Swiss Interactive Software GmbH (August 2014 - December 2014). Front-End and Back-End developer for gambling platform and websites (using the platform). Here's you can see some of the websites we built (PHP, MySQL, HTML, CSS, JavaScript, Bash): ○ betboro.com ○ sports.flutterclub.com ○ sports.princessstar.com ○ globalbet.eu ● Ad.net (February 2015 - Present).Java
HTML5CSS 3C++MySQLReactBot DevelopmentAutomationData ScrapingPythonPHPData ExtractionWeb CrawlingJavaScriptSelenium - $55 hourly
- 5.0/5
- (54 jobs)
Hi, I’m an Android developer with over 10 years of experience in building native applications. I work with a modern tech stack, including Android Jetpack, Kotlin Coroutines, Jetpack Compose, MVVM, and Dependency Injection (DI). I also have experience with cross-platform development using Flutter/Dart and Kotlin Multiplatform. Key Expertise: • Audio/Video Calls: WebRTC integration for real-time communication. • In-App Purchases and Google Play Billing. • Machine Learning: On-device ML with TensorFlow Lite, ML Kit. • Geolocation and Firebase Services (e.g., FCM, Crashlytics, Analytics). • Media Processing: Photo, video, and audio. • Platform Migration: Converting iOS/web apps to Android. I’m skilled at integrating third-party APIs, working with CI/CD pipelines, and implementing modular architectures for scalable and testable code. I’d love to help bring your ideas to life, from early-stage concepts to full-scale app solutions. Feel free to reach out! Thanks, Oleksandr IlchukJava
Android SDKMobile App DevelopmentAndroid App DevelopmentFirebaseSmartphoneAndroidFlutterKotlin - $30 hourly
- 5.0/5
- (26 jobs)
I have 12 years experience in software development. My technology stack are as follows: - VueJS/Next.js/React/React Native/Astro - TypeScript - NodeJS - PHP - Custom/Laravel - TailwindCSS - Bootstrap - JQuery - Docker - CI/CD - Github Actions - Serverless - AWS Services - Server Management - Ubuntu & Windows - Shell/Bash Scripting (deployment automation) I am keen to details, and I work hard to provide beyond expectations. Let's work together.Java
Docker ComposeAWS CloudFormationAmazon ECSAWS LambdaNext.jsReactCircleCIPHPVue.jsLaravelAmazon Web ServicesDockerJavaScriptNode.js - $15 hourly
- 5.0/5
- (19 jobs)
#AndroidDeveloper I graduated from GC University with a degree in Computer Science in 2019 and have been working professionally as a Android developer since 2018. I developed more than 50 apps and also worked as a team lead in Idealogic software house.Java
Android SDKLaravelAndroidKotlinAndroid App DevelopmentNode.js - $35 hourly
- 4.8/5
- (6 jobs)
Hello there! If you’re looking for a reliable Senior Android developer, you are on the right page. I'm a seasoned Android developer, crafting reliable, fast, and top-notch apps. Global projects across varied domains have honed my skills and enriched my tech arsenal. 🛠 Key skills: 📎 Kotlin & Java: My trusty languages. 📎 Android SDK & Jetpack: Foundation of my work. 📎 SQL, Rxjava, Retrofit2: Tools for data and communication. 📎 Firebase & Git: Ensuring smooth workflow. 📎 MVVM, MVP: My guide for structuring apps. 📎 Design Patterns, In-app Billing, Google Maps: Enhancing user experience. 🤝 I value clear, SMART communication and deadlines, making teamwork a breeze. Ready to dive into new challenges and eager to learn, so drop me a line with your requirements. Let's create digital wonders! 📲 _____________________ * Need a wider range of services? No worries, you are on the right path anyway. I'm working in association with the 90-person-strong TOP Rated Plus Agency - PECODE. You can count on us if you need experts in UX/UI design, Mobile app development, Quality Assurance ( manual & automation). We will support you at each stage of development: 🥇 Before the start we provide you estimates based on project requirements analysis and specification 🥇 Take care of the web product's development from needs to production 🥇 Support and improve the product after realise. Since 2017 we bring client's ideas into reality, and we are looking forward to starting the collaboration with you!Java
Google PlayGitRxJavaDagger 2Android SDKAPI IntegrationMap IntegrationSmartphoneTabletKotlinLocation-Based ServiceAndroid App DevelopmentUser AuthenticationNative App Development - $35 hourly
- 4.6/5
- (16 jobs)
Do you want to turn your idea into an IT project? 𝐋𝐞𝐭’𝐬 𝐠𝐞𝐭 𝐚𝐜𝐪𝐮𝐚𝐢𝐧𝐭𝐞𝐝.:handshake: Hello, my name is Darko Kiparizovski, I am Senior Developer at 𝐃𝐚𝐭𝐚𝐎𝐱, a leading company in the Comprehensive Software Development sector. I am thrilled you’re considering us for your project, and I’m confident our team have the skills, expertise, and experience to deliver outstanding results. 📌 Our Offerings • End-to-end custom software development ➖ You’ve got ideas, we’ve got solutions. • Automation ➖ Automated solution from existing business process. • Data services: scraping, extraction, processing ➖ Any data. Any size. Anywhere. • SaaS and Web Development ➖ From the idea to the first subscriptions. • Dedicated Crew ➖ An extension of your in-house team. • Guarantees ➖ Dependable solutions, timely delivery, and steadfast support. 📌 Why Choose 𝐃𝐚𝐭𝐚𝐎𝐱 • Absolute dedication - the ultimate goal is the client’s satisfaction. • Stress-free same-day communication with the top experts in the industry. • Relationship-centric approach - approximately 80% of our clients are returning customers. • In-depth engagement - increased involvement leads to superior outcomes. • Complete transparency - no unexpected surprises, remain informed throughout the process. • Going the extra mile - providing added advantages to exceed your expectations. • Proficient in English - eliminating language barriers for clear communication and timely execution. If these resonate with you, our team is poised to meet your needs! Feel free to schedule 𝙁𝙍𝙀𝙀 consultation with 𝗧𝗢𝗣 𝗘𝗫𝗣𝗘𝗥𝗧𝗦. Just contact usJava
AutomationWeb CrawlingFull-Stack DevelopmentData ScrapingSocial Media ChatbotWeb ApplicationOCR AlgorithmETLDiscord Bot DevelopmentSocial ListeningData ExtractionBack-End DevelopmentPythonScrapy Want to browse more freelancers?
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