Hire the best Java Developers in Hangzhou, CN

Check out Java Developers in Hangzhou, CN with the skills you need for your next job.
  • $38 hourly
    ✅ 13 Years Professional Experience ✅ 40+ Mobile Apps ✅ Top Rated Plus Developer Hey there! 👋 I'm Sherwin, an expert Engineer with 13+ years of experience at big tech companies. I'm experienced leading, designing and implementing core mobile features in fast-paced, technology-driven environments with worldwide impact and multiple stakeholders. I am fluent in English and have experience working with scalable and testable code, REST APIs, multiple design patterns, CI/CD pipelines and version control. 🏆 Worked in the multinational company MicroStrategy, Developed apps with over 100 million daily users such as DiDi and Kuaishou. 🚀 Expertise in Technologies: o Native Development: Swift, SwiftUI, Objective-C, Kotlin, Java, Jetpack Compose, HarmonyOS o Cross-Platform Frameworks: React Native , Flutter o DataBase: Realm, CoreData, Firebase FireStore, Firebase Realtime Database, Supabase, RoomDatabase o Web: Flutter Web o Deploy: AWS S3, Lamda, CloudFront, EC2, OpenShot o Server Development: Python ✅ My experience domains: o Bluetooth / Smart Watch / Camera Domain o Fitness / Health Domain o OpenAI / Assistance / Whisper o Location Tracking / Travel o Social Media/Dating Domain/Video/Audio chats o Video/Audio player processing application o Financial / Shopping Domain o Payment / In App Purchase / Apple Pay / Stripe o Connection between clients and hardware suppliers in China I'm excited to bring my experience and skills to new projects and deliver high-quality work on time and within budget. Let's make great apps together! Regards, Shaolin
    vsuc_fltilesrefresh_TrophyIcon Java
    iOS SDK
    Supabase
    Firebase
    Native App Development
    Smartwatch
    Flutter
    Bluetooth
    iOS
    Android
    React Native
    Objective-C
    Swift
    Kotlin
    Mobile App Development
  • $40 hourly
    Focus on solving practical problems with NLP technology, especially the construction of knowledge graph and the implementation of application scenarios. At the same time, graph neural network is also a technical field that I am good at. Of course, I am also a mature algorithm engineer, familiar with the whole process from model development to deployment and launch, and I hope I can help you.
    vsuc_fltilesrefresh_TrophyIcon Java
    Database
    Neo4j
    Algorithms
    Python Script
    Graph Database
    Algorithm Development
    Neural Network
    TensorFlow
    PyTorch
    Natural Language Processing
    Python
    Data Science
    Machine Learning
  • $29 hourly
    Hi 👋 With 15 years of professional experience and I am proficient in software architecture, backend and frontend development, and database design. I hold a master degree of software engineering from University of Science and Technology of China. 🏆 15 years of experience in application design and implementation, strong knowledge in developing scalable and high-performance application solutions. ✅ Proficient in Java stack : Java, Spring, Spring MVC, Spring Boot, Microservice, Hibernate, JPA,MyBatis. ✅ Database: MySQL, SQL Server, PostgreSQL, MongoDB, Oracle, DB2. ✅ Middleware: RabbitMQ, RocketMQ, Kafka, Redis, ElasticSearch. ✅ Proficient in SQL, performance tuning and riched experience in database design. ✅ Front-end : React.js,Next.js,Vue.js,HTML, JavaScript, TypeScript, jQuery, CSS,Tailwind CSS,Material UI. ✅ Proficient in AWS, GCP, Azure, Alibaba Cloud, Docker, Kubernets,Terraform, Prometheus, Grafana, Jenkins. ✅ Proficient in .Net stack: C#, ASP.NET, ASP.NET MVC, .NET Core, WebAPI, WPF, WinForm. ✅ Proficient in SSIS,SSRS(Reporting Service), SSAS, ETL, Crystal Report ✅ Proficient in Microservice Architecture Design and Monitoring. ✅ Familiar with lifecycle of development and strong skills in DDD(Domain Driven Design). I also have solid Python development experience, and I am familiar with Django and Fast API development frameworks. ✅ PMP certificated and areas of expertise including Agile project management, cross-function coordination,timeline & risk control & documentation. 🏆 Technology Invention Patent(first or lead author): ✔ CN112612807A Distributed transaction data consistency system design method ✔ CN112559548A Data synchronization system and method for message-oriented middleware ✔ CN112613912A Discount coupon receiving system in high concurrency scene ✔ CN112528124A Search and recommendation design system of search engine ✔ CN112671883A Multifunctional message notification system design method ✔ CN112529712A Modeling method and system for user operation analysis RFM What you can expect working with me: - QUALITY: I manage and execute projects in ways I learned working in Infosys & Intel. Anything I deliver is with the standards of quality that can be expected for US top technology companies. Bug fixing is free after delivery. - COMMUNICATION: I provide frequent status updates and quick responses to reduce clients' anxiety. For larger projects, I use professional project management tools to keep clients updated. - PRICE: Every project has uncertainty and risk, cost overrun being the most common. For fixed-price projects, the risk is on me. The price I give you is not high and is guaranteed. You will never see a price increase in the middle and I will do whatever is required to deliver the product. My clients' happiness is always my top concern. I'll be looking for a communication from you.
    vsuc_fltilesrefresh_TrophyIcon Java
    ETL
    Android
    Spring Cloud
    .NET Core
    Next.js
    Elasticsearch
    Vue.js
    React
    Redis
    C#
    MySQL
    Microservice
    Spring Boot
  • $25 hourly
    bigdata,sql optimize,sql parser,apache calcite,java,bigdata,sql optimize,sql parser,apache calcite,java,bigdata,SQL,Linux Shell,Apache calcite,Apache Maven,Springboot,Apache Yarn,Apache Spark,Apache Calcite,Jenkins,MySQL,PostgreSQL,GitLab
    vsuc_fltilesrefresh_TrophyIcon Java
    Unix Shell
    Apache Hive
    Apache Hadoop
    Spring Boot
    Jenkins
    GitLab
    GitHub
    Apache Spark
    SQL
    PostgreSQL
  • $50 hourly
    I am a Software System Architect with extensive experience in designing, developing, and managing software systems. I have a strong background in software engineering, computer science, and information technology. I am highly organized and have excellent problem-solving skills. I am able to work independently and as part of a team. I am proficient in a variety of programming languages, including Java, C++, and Python. I am also familiar with various software development methodologies and tools. I have a proven track record of successfully designing, developing, and managing software systems that meet customer requirements. I am committed to delivering quality software solutions in a timely manner.
    vsuc_fltilesrefresh_TrophyIcon Java
    Data Analysis
    Architectural Design
    Python
    Deep Learning
  • $25 hourly
    1. Be expert in tuya iot platform, Fox example, Product Development,Tuya Panel,Cloud Development and App Development.I'm familiar with creating OEM APP/SDK,connecting Tuya Cloud api(High Way Api)。I had experience in. creating Cloud Application to connect tuya to manage all devices. 2.Have experience in Tuya device panel development, familiar with UI development of mini programs and rn panels of tuya. 3. 10+ years experience in Java Application. For example Java,tomcat,mysql,oracle,spring,dubbo,javascript,html5,restful,hibernate,spring mvc,struts,jsp,servlet,xml,mybatis,sql,nodejs,python,kotlin,aws iot core and etc
    vsuc_fltilesrefresh_TrophyIcon Java
    AWS IoT 1-Click
    Azure IoT HuB
    AWS IoT Core
    AWS Application
    HTML
  • $20 hourly
    I’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help. Knows HTML and CSS3, PHP, jQuery, Wordpress, and SEO Full project management from start to finish Regular communication is important to me, so let’s keep in touch.
    vsuc_fltilesrefresh_TrophyIcon Java
    Chinese to Japanese Translation
    Chinese to English Translation
    Translation
    Spring Boot
    Software
  • $40 hourly
    Master common architecture design methodology; Skilled use of Spring technology stack and common Web development kit; Master SpringCloudAlibaba dubbo technology stack, familiar with related source code; Familiar with cloud native technology stack, including docker k8s; Familiar with low-code design knowledge DDD field modeling master process engine form engine SaaS renter and other related fields, familiar with financial product business integration fee control domain related business fields
    vsuc_fltilesrefresh_TrophyIcon Java
    TypeScript
    React
    Kubernetes
    Golang
  • $60 hourly
    ’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help. Knows HTML and CSS3, PHP, jQuery, Wordpress, and SEO Full project management from start to finish Regular communication is important to me, so let’s keep in touch.
    vsuc_fltilesrefresh_TrophyIcon Java
  • $30 hourly
    Hi, I'm Bill, an experienced developer with a strong focus on backend developing, data engineering and automation. I am experienced in developing Restful API services, data scraping & cleaning & processing, multi-source data integration, tool & script developing, etc. I mainly use Java & Python & C++ & SQL & shell, and am familiar with many technologies including MongoDB, MySQL, Redis, ClickHouse, ELK(Elasticsearch&Logstash&Kibana), Kafka, Zookeeper, Docker, K8s, MQ(ActiveMQ, RocketMQ, etc), Pandas, OpenPyXL, Numpy, FastAPI, Flask, etc.
    vsuc_fltilesrefresh_TrophyIcon Java
    Docker
    Kubernetes
    Flask
    FastAPI
    pandas
    Spring Boot
    Spring MVC
    Python
    Data Processing
    ETL
    Back-End Development
  • $20 hourly
    I'm a QA tester with more than 10 years working experience in software testing, especially in automation testing I have rich experience. I also have experience on python development for several projects. Here is my key skills: Python / JAVA / Selenium / Cypress / Jmeter / AWS / Robot Framework / Jenkins
    vsuc_fltilesrefresh_TrophyIcon Java
    Jenkins
    TestNG
    API Testing
    Apache JMeter
    Performance Testing
    pytest
    Selenium
    Cypress
    Python
    Test Automation
    Quality Assurance
  • $40 hourly
    IT Skills 1. Have a solid foundation in Java programming fundamentals, with good coding practices. Independently customize the basic structure of microservice projects and code generation scaffolds, facilitating the unified coding style of projects and rapid development. 2. Proficiently master various Core Java technology stacks, have in-depth understanding of concurrent programming, JVM, etc., and possess certain online problem-solving abilities. 3. Understand the ideas of SOA and microservice architectures, and have rich development experience in distributed projects, distributed transactions, distributed locks, etc. 4. Be familiar with Java Web development and the use of its common servers and open-source frameworks, and have a certain understanding of the high-performance multi-threaded asynchronous processing framework Disruptor and its principles. 5. Be familiar with and master common middleware, such as RocketMQ, Redis, Zookeeper, Dubbo,
    vsuc_fltilesrefresh_TrophyIcon Java
    Spring Boot
    Redis
    RabbitMQ
    HTML
    CSS
    JavaScript
    Node.js
    MySQL
    Elasticsearch
    Spring Cloud
    International Development
    Product Development
    Web Development
    DevOps
  • $75 hourly
    I'm a developer experienced in building websites for small and medium-sized businesses. Whether you're trying to win work, list your services, or create a new online store, I can help. • Knows Java, sping boot, MySQL • Full project management from start to finish • Regular communication is important to me, so let's keep in touch.
    vsuc_fltilesrefresh_TrophyIcon Java
    Spring Boot
    Problem Solving
    Architecture
    Database
  • $100 hourly
    years of work experience Address: Hangzhou | Current status: waiting to join | Job Intention: Senior Java development engineer Technology Stack * Java Foundation: Java foundation is relatively solid, understanding of multithreading and common collection framework. * Spring: be familiar with the development of Spring framework, understand SpringBoot and SpringCloud, and be able to develop based on it. * Database: familiar with MySQL, experienced in SQL tuning, familiar with common SQL performance problems. * Es: Familiar with es storage and use, experienced in es optimization, and familiar with common query optimization. * Jvm: Knowledge of memory model and garbage collection algorithm, experience in FullGC troubleshooting and JVM tuning. * Middleware: Familiar with RocketMQ, Redis, ZooKeeper, Hystrix and other middleware and can be used in the project. * Operating system: Be familiar with common Linux commands and be able to quickly
    vsuc_fltilesrefresh_TrophyIcon Java
    Android
    Java ME
  • $70 hourly
    i am skilled in both translation and programming, offering a unique combination of language proficiency and technical expertise. I can effectively translate various types of content while also developing and programming applications, ensuring high-quality and efficient work in both areas.
    vsuc_fltilesrefresh_TrophyIcon Java
    Python
    French
    Chinese
    Moroccan Arabic
    Arabic English Accent
    English Tutoring
    Writing
    C++
    Translation
  • $80 hourly
    I’m a developer experienced in building websites, deep learning for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help.
    vsuc_fltilesrefresh_TrophyIcon Java
    AI Agent Development
    Deep Learning
  • $40 hourly
    I am committed to creating excellent technical solutions for your business and pushing your applications to the forefront of the industry. As a full stack developer with over 6 years of backend development experience, I am proficient in various technical platforms, including springboot, and have a solid foundation in backend development (over 5 years of experience). Whether you are a startup, a large enterprise, or an individual developer, I will do my best to provide customized technical support for you. Professional skills Backend development: More than 5 years of Java development experience, familiar with database design and optimization, as well as the construction and operation of microservice architecture. Project Experience In my past work, I have been involved in the development of over 40 projects, covering multiple fields such as software development, web application development, and mobile development. I focus on results orientation and ensure timely delivery of projects through efficient work methods. At the same time, I am good at communicating and collaborating with team members to solve problems together. Personal strengths 1. Proficient in MySQL, Oracle, I have a certain understanding of SQL optimization and a deep understanding of MySQL's underlying execution 2. Proficiently master and be familiar with the principles of multi-threaded and JUC concurrent programming synchronization, Atomic atomic classes, BlockingQueue, AQS, CAS, Lock locking principles, thread pool principles, lock classification implementation (sad, happy, public, non, re-entry), and commonly used concurrent libraries such as Semantics/CountDownLatch/CyclicBarrie principles 3. Have a deep understanding of the design principles and underlying structures of open source frameworks such as RocketMQ and Zookeeper, and have studied the source code of core functions 4. Have a deep understanding of Redis data model and be able to master the design and usage of some code through Redis design ideas 5. Proficient in the core data structure usage scenarios of Redis, familiar with multi-level cache architecture, and familiar with various high concurrency cache architectures, such as cache avalanche, cache penetration, cache failure, and hotspot cache reconstruction 6. Proficient in IDEA, Git, Maven and other development and version control tools, proficient in Java basic technology Jsp Servlet、Jdbc, Proficient in web application system development and possessing independent development capabilities; 7. Proficient in JVM memory structure, object memory layout, class loader, bytecode technology, JVM parameter tuning in production environment, garbage collector principle, stress testing tool JMeter, troubleshooting CPU surge and memory leakage issues in production environment, and using Arthas diagnostic tool 8. Familiar with distributed and microservices, familiar with RPC remote calling framework, common components of SpringCloud first generation Netflix and second SpringCloudAliBaba services 9. Participate in technical proposal review, code review, code review and other work to ensure project quality, develop and improve system processing performance, and solve potential technical risks in the system, 10. Possess good design skills, able to provide easily acceptable solutions based on business scenarios, conduct reasonable abstraction and modeling according to business demands, and continuously improve the existing platform. service content Software and Web Application Development: Provide end-to-end services from requirement analysis, design, development to testing and deployment based on customer needs. API development and integration: Design and develop efficient and secure API interfaces to achieve seamless integration of front-end and back-end data. Performance optimization and SEO: Adopting best practices to optimize website performance and improve user experience; At the same time, according to search engine rules, perform SEO settings to improve website ranking. Product Release and Continuous Support: Provide comprehensive technical support from MVP (Minimum Feasibility Product) to the final version of the product release; And provide regular project maintenance and support services. Communication and Cooperation I pay attention to communication and cooperation with clients, and answer your questions with a clear, friendly, and professional attitude. I provide 24/7 technical support to ensure that you receive timely response and assistance at any time.
    vsuc_fltilesrefresh_TrophyIcon Java
    Spring Data
    Spring Cloud
    Spring Boot
    Script
    ERP Software
    Database
    SQL
  • $100 hourly
    Work Experience: - Over 11 years of experience in server-side development, including 9 years in online travel and 2 years in cross-border e-commerce. Has served as CTO at a startup, Senior Development Manager at Ctrip, and Technical Expert (P7) at Alibaba. Professional Skills: - Main technical stack includes Java server-side development and big data development. Has also periodically used C#, front-end technologies, operations, and worked as a full-stack engineer. Has over 2 years of experience in cloud operations.
    vsuc_fltilesrefresh_TrophyIcon Java
    Kubernetes
    Docker
    DevOps
    Web Application
    Web Development
    Ecommerce Website
    Big Data
    MySQL
    JavaScript
  • $50 hourly
    I am an experienced senior Java software development engineer. Whether it is system architecture, system performance, or product understanding, I can provide you with help.
    vsuc_fltilesrefresh_TrophyIcon Java
    Product Development
    Ecommerce Website
    Ecommerce
  • $22 hourly
    Over the last 3 years, I have developed a wide range of flex web and AIR apps using flex 3, flex 4, AS3, Cairngorm, MATE, and PureMVC. My core competency lies in solving technical issues and problems quickly. I also have some experience in the following areas: flash, iphone, php, mysql, java, j2ee.
    vsuc_fltilesrefresh_TrophyIcon Java
    SOAP
    Adobe Flex
    J2EE
    Database Modeling
    Jakarta Server Pages
    C++
    JavaScript
    SQL
    .NET Framework
  • $10 hourly
    Hi, my name is Dan Zheng. I have more than 14 years of experience in system R&D and technology management with national system architect qualification, and are professional at system architecture design, core module development, trouble shooting, and new technologies implementation. I contribute to some famous open source projects such as spring-boot, spring-security, apache skywalking, alibaba easyexcel, etc. Topcoder is the world largest crowdsourcing competition platform with over 1 million developers, my handle is savon_cn, and I get rank 30 in development challenges.
    vsuc_fltilesrefresh_TrophyIcon Java
    Spring Boot
    Docker
    React
    Flutter
    Golang
    HTML5
    MySQL
    Node.js
    PostgreSQL
    Vue.js
    Python
    Angular
    iOS
    Android
  • $25 hourly
    I am an experienced programmer of consumer-facing applications and services, with a background building in the livestreaming, note-taking, AI large models, and automation fields.I have been designing, developing, and assisting with software projects in a number of categories. • Web and development with HTML5/CSS/JavaScript(React, Vue, TailWind, etc.) • Mobile development with React Native/Uniapp, and native Java development • Desktop software development with Electron/PySide • Full stack development with Java/SpringBoot,Python/Django/Flask,Node/NextJS,C#/.Net Core WebAPI I've successfully revived and brought order to various JavaScript projects. If you're up against a tight deadline or need help making sense of a complex codebase, I'm here to assist. Let's discuss how we can get everything back on track. My projects have included: • An Android digital human application for real-time large model conversations with voice cloning.(native Java) • An enterprise SaaS backend web management system(Vue,ElementUI,Java/SpringBoot) • A local Notion-like note-taking application using Electron,React,AntdUI,Tiptap,TypeScript • A digital human live streaming software featuring voice cloning, tts/asr and Barrage reply,etc. If you have a JavaScript project that needs creation or work, it is likely that I can provide for you. Drop me a line and we’ll discuss what can be done.
    vsuc_fltilesrefresh_TrophyIcon Java
    Android
    React Native
    Microsoft SQL Server
    MySQL
    Electron
    JavaScript
    Spring Boot
    Django
    Python
    .NET Core
    C#
    React
    Vue.js
    HTML
  • $20 hourly
    I have been working as a Java developer in China for 4 years, and I think I have some experience. Now I want to improve myself and earn some extra money. I am good at using the Spring framework for development, but I think I am not good at page-related development such as JavaScript and Vue.
    vsuc_fltilesrefresh_TrophyIcon Java
    JetBrains IntelliJ IDEA
    Swagger
    GitHub Copilot
    Linux
    Spring Cloud
    Apache Maven
    GitLab
    Docker
    Redis
    RabbitMQ
    MyBatis
    Spring Boot
    MySQL
  • $20 hourly
    I’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help. Knows HTML and CSS3, Vue Skilled with Java Python C++ Full project management from start to finish Chinese-English translation Regular communication is important to me, so let’s keep in touch.
    vsuc_fltilesrefresh_TrophyIcon Java
    C++
    Python Numpy FastAI
  • $200 hourly
    I’m a developer experienced in LLMs application for small and medium-sized businesses. Whether you’re trying to win work, build your Agents, or fine-turning your LLMs, I can help. Knows LLMs such as ChatGPT, Baichuan, ChatGLM,etc. Familiar with optimization methods such as SFT and Prompt Engineering. Full project management from start to finish. Regular communication is important to me, so let’s keep in touch.
    vsuc_fltilesrefresh_TrophyIcon Java
    LLM Prompt Engineering
    LLM Prompt
    ChatGPT Prompt
    ChatGPT API
    ChatGPT
    SQL
    Hive
    TensorRT
    TensorFlow
    Dialogue Track
    NLP Tokenization
    Algorithms
    Large Language Model
    Python
  • $20 hourly
    Hello there! 👋 I'm an experienced developer with a diverse skill set and a proven track record in delivering impactful projects. Let me walk you through my expertise and project experience: Technical Proficiency: Java Basics: Equipped with a solid foundation in Java programming, capable of developing robust applications and systems. Python Fundamentals: Proficient in Python programming, adept at leveraging its versatility for various development tasks. Data Structures: Experienced in designing and implementing efficient data structures, ensuring optimal performance and scalability. Image Algorithms: Skilled in implementing image processing algorithms to manipulate and analyze visual data effectively. AI Engineering: Well-versed in AI engineering principles, capable of developing and deploying AI-driven solutions to address real-world challenges. Project Experience: Traffic Data Science: Led a team in analyzing and modeling traffic data to optimize transportation routes and improve traffic flow in urban areas. Target Clustering: Implemented algorithms for target clustering in large datasets, enabling effective segmentation and analysis for targeted marketing campaigns. Automated 3D Model Generation: Developed automated pipelines for generating 3D models from 2D images, streamlining the process for architectural visualization and virtual reality applications. Project Management Experience: In addition to technical expertise, I bring valuable project management experience to the table. With a track record of successful project deliveries, I ensure projects are completed on time and within budget. Effective Communication: I prioritize clear and transparent communication throughout the project lifecycle. Regular updates and collaborative discussions ensure alignment with your vision and goals. Let's collaborate to transform your ideas into tangible solutions. Feel free to connect with me, and let's discuss how we can leverage my expertise to bring your projects to fruition!
    vsuc_fltilesrefresh_TrophyIcon Java
    Data Science
    Software
    AI Development
    Python
  • $30 hourly
    I am an experienced Java development engineer with unique insights into e-commerce systems. My team members possess diverse skills that enable us to accomplish a range of tasks, including UI design, front-end development, and client-side development. I hope to establish contact with you.
    vsuc_fltilesrefresh_TrophyIcon Java
    iOS
    React
  • Want to browse more freelancers?
    Sign up

How hiring on Upwork works

1. Post a job

Tell us what you need. Provide as many details as possible, but don’t worry about getting it perfect.

2. Talent comes to you

Get qualified proposals within 24 hours, and meet the candidates you’re excited about. Hire as soon as you’re ready.

3. Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

4. Payment simplified

Receive invoices and make payments through Upwork. Only pay for work you authorize.

Trusted by

How do I hire a Java Developer near Hangzhou, on Upwork?

You can hire a Java Developer near Hangzhou, on Upwork in four simple steps:

  • Create a job post tailored to your Java Developer project scope. We’ll walk you through the process step by step.
  • Browse top Java Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top Java Developer profiles and interview.
  • Hire the right Java Developer for your project from Upwork, the world’s largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a Java Developer?

Rates charged by Java Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a Java Developer near Hangzhou, on Upwork?

As the world’s work marketplace, we connect highly-skilled freelance Java Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Java Developer team you need to succeed.

Can I hire a Java Developer near Hangzhou, within 24 hours on Upwork?

Depending on availability and the quality of your job post, it’s entirely possible to sign up for Upwork and receive Java Developer proposals within 24 hours of posting a job description.