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Clients rate Java developers
Rating is 4.8 out of 5.
4.8/5
based on 206 client reviews
  • $68 hourly

    • 5.0/5
    • (5 jobs)
    🌟 Proven Ex-Amazon Senior Software Engineer with 12+ Years of Experience 🌟 Are you seeking a seasoned software engineer with a background in both FinTech and tech giants like Amazon? Look no further! With over 12 years of hands-on experience, including tenure as part of a dynamic FinTech team and a successful stint at Amazon, I bring a unique blend of expertise, innovation, and leadership to every project. 🔍 Why Choose Me? ✅ Amazon-Caliber Expertise Having navigated the intricate systems and fast-paced environment at Amazon, I bring a wealth of experience in developing large-scale solutions that can withstand the demands of the modern digital landscape. ✅ AWS Architecture Certifications Holding AWS architecture certifications, I bring a deep understanding of AWS services and best practices to architect and deploy scalable, secure, and highly available solutions. ✅ React, React Native, Node.js, Next.js Experience Proficient in React/React Native for building dynamic user interfaces, Node.js for scalable backend development, and Next.js for server-side rendering and efficient client-side routing, ensuring seamless and performant web applications. ✅ Technical Interviewer With a background in conducting technical interviews, I possess a deep understanding of what it takes to identify top talent and build high-performing teams. ✅ Innovative Problem Solver Whether it's optimizing performance, streamlining workflows, or tackling complex challenges, I thrive on finding innovative solutions that exceed expectations. ✅ Collaborative Team Player With a proven track record of collaborating with cross-functional teams, I excel at fostering a culture of collaboration and driving projects towards successful outcomes. 🚀 Services I Offer: 🔹 Software Development Custom software solutions tailored to your unique requirements, utilizing the latest technologies and best practices. 🔹 System Architecture Designing scalable, resilient, and secure systems that lay a solid foundation for your digital initiatives. 🔹 Serverless Implementation Leveraging cloud-native serverless architectures to build highly scalable and cost-effective solutions. 🔹 Database Design Designing and optimizing database schemas for efficient data storage and retrieval. 🔹 React/React Native, Node.js, Next.js Development Building modern web/mobile applications with React/React Native for dynamic frontends and Node.js for scalable backend services, along with Next.js for server-side rendering and efficient client-side routing. 🔹 Code Reviews & Optimization Enhancing the efficiency, reliability, and maintainability of existing codebases through meticulous code reviews and performance optimizations. 🔹 Technical Consultation Strategic guidance and insights to help you make informed decisions about your technology roadmap and architecture. Let's collaborate to bring your vision to life and elevate your software projects to new heights. Reach out today to discuss how I can contribute to your success!
    Featured Skill Java
    Bash Programming
    C
    C++
    AWS Development
    AWS AppSync
    AWS Amplify
    AWS Lambda
    Angular
    Firebase
    React Native
    AWS CloudFormation
    Node.js
    JavaScript
    Python
    NoSQL Database
    React
    HTML5
    SQL
  • $40 hourly

    • 5.0/5
    • (8 jobs)
    I have nine years of experience with software development and an engineering degree from McMaster University (in Canada). I am proficient with JavaScript, HTML, CSS, AJAX, jQuery, PHP, C/C++, C#, Java, Servers, relational databases, computer graphics, Agile development, data structures, and algorithms.
    Featured Skill Java
    Algorithms
    Computer Graphics
    Relational Database
    Three.js
    WebGL
    Mapbox
    Google Maps
    C#
    C++
    PHP
    AJAX
    CSS
    HTML
    JavaScript
  • $70 hourly

    • 5.0/5
    • (3 jobs)
    I am a full-stack developer with deep knowledge of cryptography with AI and its mainstream models. I specialize in integrating post-quantum cryptography (lattice-based), zero-knowledge proofs, and building encrypted, verifiable AI systems, e.g. blockchains and other ledgers. My expertise extends to migrating AI models to post-quantum computable encryption for future-proof security, developing algo-trading solutions for DeFi. I am proficient with Clouds, deploying software in Kubernetes clusters across Azure, AWS, GCP, and OpenShift. Key Expertise: -- Full Stack Development: Backend Development: Java, Spring Boot, Scala, Go, Rust, C++, Python, Node.js Frontend Development: Angular, React, Vue.js, HTML/CSS, TypeScript, WebAssemebly Cloud Platforms: AWS, Azure, Google Cloud, OpenShift, Docker, Kubernetes Databases: SQL Server, Oracle, MongoDB, PostgreSQL, MySQL, Neo4j, Cassandra Messaging: Kafka, Akka, ActiveMQ, RabbitMQ, Azure Event Hub & Google Pub/Sub Identity and Security: OID, OAUTH2, PKI, KeyClock, EntraID, AWS Congito and other identity providers, PKI, AES, RSA, ECC -- AI & Machine Learning Expertise: Generative AI: Development of large language models (LLMs, OpenAI, Vertex Ai, ChatGPT, LLama), RAG and Agentic AI, LangGraph, LLamaIndex, LangChain & LangGraph, and other NLP solutions Machine Learning: Building and deploying machine learning models for classification, prediction, and data analytics Autonomous Agents, Graphs & Knowledge Graphs: Experience in building autonomous AI agents capable of decision-making, planning, and task execution using reinforcement learning, multi-agent systems, and LLM-based architectures. Developed agents for real-time data processing, automated workflows, computer vision, and self-adaptive AI solutions in diverse environments. AI Frameworks: TensorFlow, PyTorch, Scikit-learn, Keras, MediaPipe FHE (Fully Homomorphic Encryption): Expertise in secure data processing, enabling encrypted AI and machine learning workflows Natural Language Processing (NLP): Implementing intelligent agents, conversational AI, and language models for automated decision-making Computer Vision: AI-based image and video recognition using deep learning techniques Edge AI: Developing and deploying AI solutions on edge devices, leveraging WebAssembly and MediaPipeline -- Cloud App Migration & DevOps Expertise: Cloud Migration: Extensive experience in migrating enterprise applications to the cloud using both lift-and-shift and refactoring approaches Lift-and-Shift: Proven ability to seamlessly migrate legacy systems to cloud platforms like AWS, Azure, and Google Cloud with minimal disruption to operations Cloud-Native Refactoring: Re-architecting applications to fully leverage cloud-native services such as serverless, containerization, and microservices for enhanced scalability and performance Infrastructure as Code (IaC): Expertise in automating deployments using tools like GitHub Actions, Terraform, and Azure Resource Manager CI/CD Pipelines: Designing and managing continuous integration and delivery pipelines with tools like Jenkins, Azure DevOps, and GitLab CI DevOps Tools: Proficient in Docker, Kubernetes, OpenShift, and monitoring solutions like Splunk, Prometheus, and Grafana -- Blockchain & Cryptography Expertise in Web3, Solana, zkSnarks, Circom -- Blockchain Algo Marginal Trading: Hyperliquid, Binance, Coinbase Post - quantum blockchain migrations encrypted computations to ensure privacy and security
    Featured Skill Java
    Retrieval Augmented Generation
    ChatGPT
    Apache Kafka
    Kubernetes
    Artificial Intelligence
    Blockchain
    Next.js
    Vue.js
    React
    Angular
    Spring Boot
    Scala
    Python
    Rust
  • $57 hourly

    • 5.0/5
    • (42 jobs)
    Hello! I'm Pavlo, an individual Android (Kotlin, Java) and iOS (Swift) developer with 11 and 6 years of commercial experience, respectively. I also have a few months of commercial experience in cross-platform development using Flutter. If you are looking for such a specialist, please take a couple of minutes to check out my profile. 🟢 MY SERVICES 🟢 The services I provide cover a broad spectrum of capabilities, which include, but are not limited to: - Developing mobile applications for iOS and Android, including iPhone, iPad, Android phones and tablets, TV and wearable devices. - Providing ongoing support, maintenance, and updates for existing apps. - Porting apps from different platforms to iOS and Android. - Recreating cross-platform and hybrid apps using native technologies. - Performing code migrations and updates, including SDK version, package builder, legacy libraries, and other tools. - Transforming app designs from Figma into functional applications. - Incorporating in-app purchases and advertisements into the apps. - Submitting the apps to the App Store and Google Play, resolving any review-related concerns. - Conducting prototyping and UI/UX design. - Creating comprehensive technical documentation and API specifications. 🟢 MY WORKING EXPERIENCE 🟢 My commercial experience as a mobile developer began in 2013 when I secured a job as an Android Java developer. Since 2015, I have been working exclusively as a freelancer. In 2016, I started learning Swift programming language and embarked on my career as an iOS developer. In 2018, I made a complete transition from Java to Kotlin for new Android projects. Recognizing the market's need for cost-effective solutions, in 2023, I started working as a Flutter developer. Throughout my journey, I have seamlessly acquired expertise in UI/UX design by closely adhering to the platform guidelines of both iOS (Human Interface Guidelines) and Android (Material Design). As an active user of both platforms, I constantly stay updated with the latest trends in products and technologies, ensuring I never miss out on key events like Apple WWDC and Google I/O conferences. Building upon my previous commercial experience as a QA engineer from 2012 to 2013, I combine meticulous attention to detail with strong perfectionistic tendencies, enabling me to consistently deliver exceptionally high-quality and reliable mobile applications. 🟢 MY SKILLS 🟢 Here are some of the cutting-edge technologies I utilize in my work. Native Android: - Android SDK, Gradle, Kotlin, Kotlin Coroutines, MVVM Architecture, Jetpack, Jetpack Compose, Retrofit, Apollo GraphQL, Hilt, Room for SQLite, and JUnit. Native iOS: - iOS SDK, Swift, Swift Package Manager, MVVM Architecture, SwiftUI, Combine, Concurrency, Alamofire, Apollo GraphQL, Swinject, CoreData, and XCTest. Flutter: - Flutter SDK, Dart, MVVM Architecture, Concurrency, dio, sqflite. I possess extensive experience working with numerous other technologies, frameworks, and libraries such as: Java, RxJava, XML UI, CocoaPods, UIKit, RxSwift, MVC & MVP Architecture, Dagger, Koin, Realm, Glide, Coil, Picasso, Kingfisher, SDWebImage, Google Maps & Geocoding, MapKit, HealthKit, Mapbox, Facebook SDK, Twitter SDK, Zoom SDK, GitHub SDK, Google Pay, Apple Pay, Stripe, Braintree, AdMob, Bluetooth, Bluetooth Low Energy (BLE), NFC, Camera API, Firebase SDK (Analytics, Crashlytics, Auth, Database, Firestore, Machine Learning, Storage, Hosting, Cloud Functions, and more).
    Featured Skill Java
    Figma
    iPad App Development
    iOS SDK
    Android SDK
    Apple Xcode
    Android
    Android App Development
    Kotlin
    iOS
    Swift
    iOS Development
    Firebase
    Android Studio
    iPadOS
  • $125 hourly

    • 4.8/5
    • (72 jobs)
    I got my hands on iPhone SDK when it was first released in 2008. I was intrigued by the responsive touch interface, and since then I've written over 50+ apps and have worked with dozens of clients worldwide. In 2014 I started working with Android SDK as well. It was quite a change (and challenge..) coming from the iOS ecosystem but I embraced it and have become quite fond of it since then. Nowadays, it's very common for me to develop Android and iOS versions of apps alongside (although Natively). I've worked with clients from Silicon Valley to Singapore with experience in front and backend. I love developing MVPs (Minimum Viable Products) for my clients to test the market. If you have an idea, let's chat!!
    Featured Skill Java
    GitHub
    iOS Development
    Android
    Swift
    Node.js
    Kotlin
  • $55 hourly

    • 5.0/5
    • (8 jobs)
    I possess 6 years of experience in software development and 4 years in teaching and curriculum development. Well versed in enterprise applications in JAVA/J2EE/HTML/JSP/Angular/React/REST/Spring and SOAP Webservices,PHP, Python. With an excellent track record of building robust applications as a developer and transforming incoming graduates into industry professionals as an instructor.
    Featured Skill Java
    Apache Kafka
    RabbitMQ
    Spring Boot
    Spring MVC
    Python
    PHP
    MySQL
    Angular
  • $35 hourly

    • 4.8/5
    • (218 jobs)
    I am a Computer Engineer graduated from METU. I worked as a Java and PHP Developer for 10 years. I can write you simple to complex Django, PHP and Java web applications. I can write php, java or python scripts to scrape web page. I can make web sites with wordpress, drupal or whatever you choose. I am a hardworking person. I can learn whatever I don't know. I believe that everything can be done if you know how to learn and if you really want to do it. So I can do very different jobs for you like data scraping, excel related tasks, creating dashboards, creating web applications, any programming tasks and so on.
    Featured Skill Java
    Django
    Laravel
    React
    JavaScript
    Python
    PHP
    HTML5
    Microsoft Power BI
    Tableau
    Bootstrap
    Shopify Apps
    MySQL Programming
    SQL
    MySQL
  • $100 hourly

    • 4.7/5
    • (49 jobs)
    I am a self-motivated and diligent computer programmer who finds that the best way to develop solutions is to think outside the box. I believe that when it comes to programming work, it’s equal parts creativity and logic. I have found that being a positive, disciplined, and effective communicator, I cannot only get through any challenge, but I’m also able to evoke the same measure of resilience from those around me. • Master of Applied Computing (Artificial Intelligence stream) student with 4+ years of experience in human-computer interaction application design, development, debugging, testing, and deployment of 40+ applications • Skilled and experienced in different stages of data science lifecycle; including extracting data, design, model building, testing and validation, implementation, communication, and retraining • Possess a fervent interest in artificial intelligence, and natural language processing to capture the data from images, text, and handwriting, as well as knowledge of machine learning concepts, data visualization, and other related technologies • Ability to identify, understand, learn, and translate a program into a sustainable, advanced technical solution through Python, R, C/C++, Spark, SQL, Java, Kotlin, XML, Dart, Swift, Objective-C, and other programs for continuous improvement of AI technologies and mobile applications My expertise includes, • Programming Languages: Python, R, C, C++, Spark, Java, Swift, Kotlin, Dart(Flutter), PHP • Database: RDBMS, MySQL, Firebase Database, Cloud Firestore, Microsoft SQL Server, Oracle Database, MongoDB • Development tools: Google Colab Notebook, Visual Studio Code, PyCharm, RStudio, Android Studio, Xcode, Eclipse, Git, LaTex, Microsoft Office • Cloud Services: Hadoop, Apache Spark, Azure, GCP, AWS, IBM Cloud, Firebase Cloud • Machine Learning: Natural Language Processing, TensorFlow, Optical Character Recognition, MNIST, PyTorch, Keras, Pandas, Numpy Scikit-learn, Matplotlb • Version Control/ Management: GitHub, GitLab, BitBucket, JIRA, Trello, Slack, Confluence
    Featured Skill Java
    iOS Development
    Android App Development
    Payment Functionality
    Hybrid App Development
    Flutter
    Dart
    Bluetooth
    Kotlin
    Game Development
    Android SDK
    Database
  • $35 hourly

    • 5.0/5
    • (11 jobs)
    Excellence in C, C++, JAVA, JavaScript, Typescript, PHP, MySQL, Firebase, Android, IOS, Ionic, React Native. Experience with Mobile: - Expertise in Native and Hybrid Android/IOS App Development - Java, Kotlin, XML, Swift, Objective C, SwiftUI, Ionic, React Native, Flutter - Experience in Maps, GPS, BLE connection and data transfer with different gadgets, Payment Gateways Integration, Chat, File Management, API Integration, Push Notifications, SQLite, Core Data, Synchronization, Google Fit Integration, Health App Integration and more. - Deployment on Play Store and App Store Experience with Web: - AngularJS, Ionic, React, Laravel, Codeigniter, jQuery, Firebase Hosting - MySQL, Firebase DB Experience with Server-side Programming: - Core PHP, Codeigniter, NodeJS, Firebase Cloud Functions - MySQL
    Featured Skill Java
    Location-Based Service
    User Authentication
    Android
    Flutter
    iOS Development
    React Native
    Ionic Framework
    Android App Development
    API Integration
    MySQL
    JavaScript
    PHP
    AngularJS
  • $18 hourly

    • 5.0/5
    • (12 jobs)
    Profile Energetic outgoing professional Automated QA Engineer/Software Tester with more than 3 years of experience, proven results in manual testing, great practical experience in automated testing, and a solid understanding of quality assurance processes, methodologies, and standards. Overall practice includes mobile platforms (iOS and Android) as well as web applications.
    Featured Skill Java
    Dart
    Firebase
    Flutter
    JetBrains IntelliJ IDEA
    Automation
    Android
    iOS
    macOS
    Cucumber
    Black Box Testing
    SQL
    Selenium WebDriver
    Postman
    Jira
  • $30 hourly

    • 5.0/5
    • (5 jobs)
    12+ years of experience developing and supporting complex software solutions, with expertise in AIagent using Phidata,RAG,OpenAI,Vectorstore,Flutter,Firebase,Java, Spring Ai,OpenAi,Cloud Native technologies, DevOps, Microservices, REST APIs, and Agile/Scrum methodologies. Developed Capital Market and financial market applications using REST API from scratch, achieving significant performance improvements. Deployed scalable, highly available and modular software products and introduced methodologies and best practices to software development teams.
    Featured Skill Java
    Retrieval Augmented Generation
    Flask
    LLM Prompt Engineering
    Apigee
    Flutter
    Spring Boot
    REST API
    Oracle PLSQL
    Python
    MongoDB
    Kubernetes
    API
    API Development
    Cloud Computing
  • $20 hourly

    • 5.0/5
    • (3 jobs)
    🎯 6+ Years of Full Stack Development & Project Management 📈 50+ Apps Developed | 150+ Projects Delivered As a Developer, Project Manager, Implementation Manager, QA Testing Expert (Manual) and IT support, I offer a unique combination of technical and leadership skills, having overseen and contributed to the successful completion of 100+ projects. I specialize in building scalable, high-performance applications while leading cross-functional teams to deliver on time and within scope. Key Expertise: Full Stack Development: Proficient in MERN stack (MongoDB, Express.js, React.js, Node.js), with experience building 50+ web and mobile apps. Familiar with Next.js, Nest.js, and Tailwind CSS to create responsive, efficient frontends and robust backends. Product Leadership & Project Management: As the Product Owner for Linga rOS’ "Allure", I managed the entire product lifecycle—from concept and feature development to integration, testing, and post-launch support. I’m skilled in Agile methodology and use tools like Zoho Projects to deliver projects on time. QA Testing & Software Quality Assurance: With extensive experience as a QA Engineer, I have performed manual and automated testing using methodologies like regression, load, performance, and smoke testing. Ensuring that software aligns with business requirements is a top priority for me, from early stages through final QA checks. AI & LLM Models: Hands-on experience integrating Large Language Models (LLMs) into various platforms, including AI-driven healthcare solutions that deliver advanced, user-focused functionalities. Database & Cloud Expertise: Skilled in managing databases such as MySQL, PostgreSQL, MongoDB, SQL Server, and proficient with AWS, Google Cloud, and Microsoft Azure for seamless cloud integration and scalability. Why Partner with Me? I’m a results-driven professional who understands both the technical and business sides of a project. Whether you need full stack development, project leadership, or quality assurance testing, I bring a strategic approach to ensure successful outcomes that meet business goals. Let’s Connect: Interested in learning how I can help you achieve your project goals? Let’s schedule a free 15-minute consultation to discuss your needs! Highlighted Skills: Full Stack Development: MERN Stack, Next.js, Nest.js, Tailwind CSS, RESTful APIs, GraphQL Project Management: Agile, Scrum, Zoho Projects, Cross-functional Team Leadership, Product Ownership Quality Assurance: Manual & Automated Testing, Regression Testing, Load Testing, Smoke Testing Databases: MySQL, MongoDB, PostgreSQL, Oracle, SQL Server Cloud Services: AWS, Google Cloud, Microsoft Azure AI & ML: Large Language Models (LLMs), AI Integration Programming Languages: Java, Linux, JavaScript, TypeScript, Python
    Featured Skill Java
    Node.js
    React Bootstrap
    React Native
    React
    Full-Stack Development
    AI Implementation
    HTML
    Manual Testing
    QA Software & Testing Tools
    Waterfall
    Linux
    Python
    Technical Project Management
    Agile Project Management
  • $50 hourly

    • 4.1/5
    • (9 jobs)
    I manage a team that specializes in Software Innovations, Research and Development. We create innovative non-templated solutions which transform startup ideas into successful businesses. What we can do for you: - Custom software development for startups - our dedicated team provides you with a custom solution that suits your technical and business needs the most. As a result of our collaboration you get a fully-functional web/mobile/desktop product, from design to deployment, as well as post-production support; - AI software and apps - having profound expertise in AI/ML development we create solutions that are aimed to support your business and keep it on top of technological progress; - AR/VR design and development - we build Augmented reality and Virtual reality applications which improve operational effectiveness, reduce training time, and thus can empower your processes and open new business opportunities; - Data Analysis and Analytic Dashboards - we provide bespoke digital solutions for data analysis, visualization and building customizable reports, which are geared to your business operations and tailored to your existing methods of data collection. No matter how many data types you have, you get them connected into one source to facilitate data-driven business decisions. Our expertise: - Mobile development (native iOS/Android development, cross-platform development) - Web development - Desktop development (Windows OS desktop software) - Design (UI\UX) - AI/ML development - AR/VR development Our competency includes: - .Net - Java - Front-end (Angular) - Android - iOS Domains we work with: - education - GIS - sports - public services - healthcare - public utilities
    Featured Skill Java
    AMP Framework
    DevOps
    VR Application
    Graphic Design
    AR Application
    iOS Development
    Virtual Reality
    Project Management
    Product Management
    Scrum
    C#
    Augmented Reality
    Android
  • $10 hourly

    • 5.0/5
    • (10 jobs)
    Mobile Application Developer | iOS & Android Expert | 5+ Years Experience As an experienced native & cross-platform mobile application developer with over 5 years of hands-on expertise, I bring a proven track record of building high-quality, user-centric mobile applications. I specialize in native app development with Java for Android and Swift for iOS, along with cross-platform solutions using Flutter, giving clients flexible and optimized solutions. Key Skills: 1. Native Android Java/Kotlin Development 2. Cross-platform Solutions (Flutter) 3. Backend Development (Node.js, Spring Boot) 4. Real-Time Data Integration & API Implementation 5. User Interface (UI) & User Experience (UX) Design 6. CI/CD Pipeline Implementation for Seamless Deployment Highlights & Accomplishments: 1. Founder/Creator of KharagEdition 2. Successfully led the development of native and cross-platform apps, used by over 10,000 users. 3. Simple_barcode_scanner flutter plugin creator 4. Medium technical content writer with 600+ follower 5. Udemy Instructor with 800+ students enrolled 6. Tech speaker in multiple events With a commitment to delivering high-performing, reliable, and scalable mobile apps, I am here to help bring your project to life. Let’s discuss how I can support your goals on Upwork!
    Featured Skill Java
    Spring Boot
    Kotlin
    Swift
    Android
    Dart
    Git
    REST API
    Node.js
    Push Notifications
    SQLite
    Google Cloud Platform
    Firebase
    Flutter
  • $40 hourly

    • 5.0/5
    • (9 jobs)
    See my portfolio at luvaihassanali.github.io/portfolio/ I have five years of experience in a professional environment programming all sorts of applications from desktop to mobile. I am familiar with many coding languages like C#, Java, Python, etc. I completed my Bachelor of Computer Science at Carleton University in Ottawa, Canada. I have an understanding of the software design life cycle and software design principles. In the work environment, my experience includes developing software used by the Canadian Armed Forces. In addition to writing code, other duties include: performing documentation for mission-critical software, integration testing in high-security military labs, and setup of automated pipelines for code repositories.
    Featured Skill Java
    Windows App Development
    Microsoft PowerApps
    Microsoft Windows PowerShell
    Node.js
    Git
    JavaScript
    Python
    Desktop Application
    SQL
    C++
    C#
    C
    .NET Framework
    Electron
  • $80 hourly

    • 4.9/5
    • (32 jobs)
    I have been working on variety of projects which involves project management, coding, machine learning, neural networks and data presentation. I am well versed with ML tools, Cloud based applications and data exploration.
    Featured Skill Java
    Android Studio
    PostgreSQL Programming
    Artificial Intelligence
    IBM Watson
    SQLite Programming
    PySpark
    Django
    Deep Neural Network
    Flask
    Tableau
    Apache Spark
    Python
    Data Science
    Machine Learning Model
  • $55 hourly

    • 5.0/5
    • (28 jobs)
    Chirag Talsaniya Senior Mobile Developer | Delivering Exceptional Apps Since 2014 About Me: Hello! I'm Chirag, a seasoned Mobile Developer with a decade of experience in transforming innovative ideas into top-quality mobile applications. I specialize in both Android and iOS platforms, with an emphasis on seamless user experiences, robust backend integration, and high-performance solutions. Over the years, I have consistently surpassed client expectations, delivering products that meet both technical requirements and business objectives. Technical Proficiencies: API Integration: Expertise in REST and SOAP APIs with proficiency in JSON and XML parsing. Social Media Integration: Comprehensive experience integrating Google, Facebook, Twitter, Instagram, and Microsoft Live. Payment Solutions: Proficient in implementing secure payment gateways, including In-App Purchases, PayPal, Beanstream, Payeezy, and Moneris. Database Solutions: Skilled in SQLite, Room, and Realm databases, ensuring data efficiency and reliability. Real-Time Features: Proficient in Firebase, Push Notifications, Socket.io, and PubNub for robust, real-time interactions. UI/UX Excellence: Specialized in Android and iOS design, including Material Design principles for an intuitive user experience. Ad & Analytics Integration: Experienced with Google AdMob, Google Analytics, and Airpush for effective ad management and insightful analytics. Technology Stack: Android: Java, Kotlin, Android Studio Cross-Platform: Flutter (Dart), React Native Backend Development: Node.js Frontend Development: Angular, React iOS Development: Xcode, Swift, Objective-C Why Work With Me? I am committed to delivering applications that not only meet technical specifications but also enhance user engagement and business value. With my consultative approach, I ensure a thorough understanding of your goals, followed by clear, actionable steps to bring your ideas to life. I tackle complex challenges with a solutions-oriented mindset, providing consistent communication and quality at every stage. Let’s Get Started! Whether you're in the initial stages of an app concept or looking to optimize an existing application, I bring the expertise to make it a success. Reach out today, and let’s discuss how we can create impactful digital experiences together. Best Regards, Chirag Talsaniya 🌐 Portfolio 📧 chirag.talsaniya20@gmail.com 📞 +1 416-821-4544
    Featured Skill Java
    Flutter Stack
    Mobile App
    Android Room Persistence
    Android SDK
    Android App Development
    Mobile App Development
    API Integration
    Node.js
    Map Integration
    User Profile Creation
    Android
    Kotlin
    Flutter
    Android Studio
  • $50 hourly

    • 5.0/5
    • (2 jobs)
    I graduated from Sichuan University in 2013 with a master degree of computer science, i'm an experienced full stack Web/Desktop Application developer. I focus on building fast, accessible and intuitive solutions while developing various applications and will always do my best to meet clients’ requirements. I’ve got professional skills and experience in Java, Spring, MySQL, Oracle, RESTful API, PHP, Git/GitHub, Javascript, HTML5, CSS, Bootstrap, WordPress, Shopify and Web Hosting.
    Featured Skill Java
    Git
    Bootstrap
    PHP
    CSS
    Shopify
    HTML
    JavaScript
    HTML5
    WordPress
  • $100 hourly

    • 5.0/5
    • (8 jobs)
    Experienced Machine Learning engineer specializing in designing scalable, secure, and automated ML pipelines. Proficient in both Machine Learning theory and AIOps for model lifecycle management, big data processing, Kubernetes orchestration, and zero-downtime deployments. Adept at bridging data science and engineering to deliver reliable, production-grade ML systems that streamline workflows and ensure reproducibility across environments.
    Featured Skill Java
    CI/CD Platform
    AWS CloudFormation
    DevOps
    API Development
    Amazon Web Services
    Terraform
    Infrastructure as Code
    Software Architecture & Design
    Google Cloud Platform
    CI/CD
    Microservice
    Kubernetes
    Python
    Bash
  • $45 hourly

    • 5.0/5
    • (12 jobs)
    I speak English, Deutsch, Français, Español and Português fluently (all languages certified). As ChatGPT expert, I can help you integrate your platform with chatGPT, as I can provide extensive knowledge about prompts, completions, chat completions and fine-tuned models. As AWS Certified Solutions Architect, I can offer a wide range of AWS product developments and integrations. Today, I am running my own company Cloudnonic Corp. We specialize in cloud developments and offer programming in many different programming languages and technologies. Given my business, financial and technical background, I also offer technical business consulting. If you need advise in technical topics, analyze what makes best sense from a business standpoint, or have support in speaking with developers, feel free to reach out. Having studied in 5 different languages and lived in 5 countries made me fluent in 5 languages. I have a solid professional experience from 3 different continents. I worked in Securitization & IT at Crédit Agricole - Corporate and Investment Bank in New York City. In Medellín, I was the Head of Engineering at Ubidots, an innovative IoT Startup. I have my own app launched to the Apple App and Google Play Store. I experienced a steep learning curve bringing my idea to life, engineering the solution in code, building and launching the app. I have extensive knowledge in the following areas: - AWS Universe, serverless srchitecture ,API Gateway, Lambda, Cognito, IAM, STS, SNS, AppSync, DynamoDB, S3, AppSync, IoT Core, CloudWatch, and many more - React Native / React - JavaScript and TypeScript - Java - Python - Kotlin - Django - Node.js - Docker - Unit and Integration Tests - Android Development - GraphQL - SQL In my free time, you’d see me doing CrossFit or playing golf with friends. My colleagues and friends consider me a positive and ambitious person, somebody who has a sense of humor. I have a deep desire to learn, and I endeavor to make my clients happy by solving their most challenging problems to have a lasting, meaningful, and positive impact. You are welcome to contact me!
    Featured Skill Java
    AWS Lambda
    React
    Django
    ChatGPT
    Python
    Android App Development
    Amazon S3
    Git
    Node.js
    IT Consultation
    React Native
    Kotlin
    Artificial Intelligence
    JavaScript
    Amazon Web Services
    DevOps
  • $60 hourly

    • 5.0/5
    • (10 jobs)
    **CURRENTLY NOT TAKING WORK** A highly motivated level designer and programmer who uses a wide range of programs in order to create immersive and visually exciting digital worlds to explore. Works well independently or on a team in order to create the best possible player experience within strict deadlines.
    Featured Skill Java
    Unity
    Unreal Engine
    Roblox Studio
    3D Modeling
    Lua
    Level Design
    Game Design
    C#
    Python
  • $40 hourly

    • 5.0/5
    • (8 jobs)
    Have significant experience in analysis, design and development activities for new web applications using Java and J2EE,HTML,JS,CSS,solr, elasticsearch,AWS,FCM, Twilio , Helm chart, K8S technologies along with performing day-to-day maintenance and enhancement activities of existing applications for a period of 6 years.
    Featured Skill Java
    Firebase
    Apache Solr
    MySQL
    Microservice
    Spring Boot
    Twilio API
    Docker
    Jenkins
    Kubernetes
    Node.js
  • $50 hourly

    • 4.6/5
    • (28 jobs)
    🌟 Rewarded as 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆 by Upwork (𝗧𝗼𝗽 𝟯%) 🌟 100% Job Success Ratio
 🌟 8+ Years in Mobile App Development
 🌟 30+ Successfully Completed Projects Hello! I'm Vivek, a seasoned Senior Software Developer and passionate tech enthusiast. I'm eager to assist you in crafting top-tier, modular software that aligns with your requirements while prioritizing performance and security. Why to hire me among thousands of other freelancers? I distinguish myself through an unmatched commitment to work quality and professionalism. Establishing trust with clients and fostering effective communication are integral components of my skill set. As a developer, I strive to keep up-to-date with the latest techs from Android and Apple, and use each standard introduced with ease while following the best guidelines in order to make my code readable and maintainable. I thrive on challenges! With a positive mindset, I approach every task with determination, doing whatever it takes and never giving up. Skills: ------- ✔ Cross-platform app development, ✔ RESTful API integration, ✔ Android components (Activities, Services, Broadcast Receivers, Content providers) ✔ Fragments API, Intents, etc. ✔ Java Core, Threads, Collections. ✔ Payment and Social media SDKs integration ✔ Firebase, FreshChat, Socket.io for chat-based application ✔ Voice, Chat and Video calling integrations ✔ Google Map, Ads, In-App Purchase, In-App Billing implementation Version control and Issue tracking - Git, Bitbucket - Trello, JIRA My Working pattern: - Following Complete agile methodology - Trello/Pivotal Tracker implementation - Implementation using best architecture patterns But don't just take my word for it – let my work speak for itself. Check out my portfolio to see some of my past projects and success stories. Don't hesitate to reach out! Your project deserves the expertise and commitment that I bring to the table. Thanks, Vivek
    Featured Skill Java
    Socket.io
    API
    Apple Xcode
    API Integration
    Mobile App Development
    Flutter
    Swift
    Android Studio
    Kotlin
    iOS
    Android
    Android App Development
    iOS Development
  • $50 hourly

    • 5.0/5
    • (3 jobs)
    𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲 𝗻𝗼𝘄... Hi, I have 10+ years of profound expertise in Software Industries. Skills: - Communication (written and verbal) - Marketing - Sales - Strategy - Relationship management - Networking Key Responsibilities: - Held 3–6 discovery meetings daily for sales representatives and prospects. - Designed and oversaw an outreach strategy that brought new business opportunities. - Assessed, qualified, and prioritized the sales pipeline - Documenting the best practices to create company guidelines for existing and prospective employees. Your Business Growth Is My Goal! I am always looking for a long-term relationship based on trust and professionalism. Thank you
    Featured Skill Java
    Chat & Messaging Software
    Android
    Android App Development
    Kotlin
    Smartphone
    Google Maps API
    Model View ViewModel
    GitHub
    Retrofit
    Mobile App Development
    Android Room Persistence
    GraphQL
    Firebase
    Android SDK
  • $120 hourly

    • 5.0/5
    • (2 jobs)
    Hello! I’m a Senior Software Engineer passionate about solving complex data challenges with efficient, scalable solutions. Proficient in Scala, Java, Python, and Go, I excel with big data technologies like Kafka, Flink, Spark, BigQuery, and Druid, and in building robust infrastructure using Kubernetes. My expertise also extends to implementing advanced observability frameworks with tools like Prometheus and Grafana. Key Achievements: • Leadership: At Unity Technologies and LCBO, I led projects and teams, significantly reducing costs and enhancing service quality by introducing advanced tech solutions and optimizing cloud operations. • Teaching: As an adjunct instructor, I’ve taught over 100 postgraduates and undergraduates in machine learning and Java programming, equipping them with skills directly applicable in real-world tech environments. • Speaking: Delivered influential talks on Streaming Systems and big data technologies to tech communities, sharing insights on scalable data processing and system architecture enhancements. • Open Source: Actively contributed to Apache Druid and the Franz-go Kafka Client, with my enhancements now part of their core offerings, improving data management and monitoring capabilities. I’m excited to bring my deep technical expertise and proven track record of innovative problem-solving to your projects, ensuring top-tier results through strategic planning and cutting-edge technology.
    Featured Skill Java
    Apache Beam
    Apache Flink
    Data Processing
    Data Visualization
    Database
    Data Analysis
    Data Management
    API Development
    Data Ingestion
    Data Mining
    Software Development
    Scala
    ETL Pipeline
    Apache Kafka
  • $44 hourly

    • 5.0/5
    • (1 job)
    With over 7 years of experience as a computer science engineer, I can help architect, design, build and deploy software solutions for your company. Additionally, I have 4+ years of experience scripting and writing ETL in SAS. I am proficient in administering SAS Size Pack Optimization solution, and building tools to optimize supply chain processes. I have successfully developed and deployed SQL/Java/JQuery/HTML/CSS applications for multiple mid- to large-sized retailers. I have experience with Apache NiFi to build a complex ETL workflow.
    Featured Skill Java
    SAS
    AWS Application
    Apache NiFi
    GitHub
    SQL
    JavaScript
    Python
    CSS
    HTML5
  • $45 hourly

    • 5.0/5
    • (10 jobs)
    Over 5+ years of experience in software development and web development Self-starter and motivated to adapt to new technology Worked on a web application using Spring MVC Developed a microservice using REST and Spring Boot Implemented queue-based Microservice architecture to support asynchronous communication using Spring Boot, Java 8 Led, architecture, documented, and developed profanity tool Developed a Student Tracking System to track student data including dropout rates, a program of study, post-graduation, and employment rate which helps officials to analyze the data
    Featured Skill Java
    RabbitMQ
    API Integration
    Microservice
    Core Java
    RESTful Architecture
    Spring Framework
    RESTful API
    MySQL
    Software Architecture & Design
    Azure Cosmos DB
    API
    CSS
    Spring Boot
    JavaScript
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