Upwork home
Sign up
Project Catalog
DesignDesign
Video & AudioVideo & Audio
Development & ITDevelopment & IT
MarketingMarketing
Writing & TranslationWriting & Translation
MoreMore

You will get a Fullstack(Java/JavaScript) developer to work on your requirement/bug fix.

Huanqing Z.Status: Offline
Huanqing Z. Huanqing Z.
4.9
Top Rated
Play video
Preview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Huanqing, priced and ready to go.
Huanqing Z.Status: Offline
Huanqing Z. Huanqing Z.
4.9
Top Rated
Play video
Preview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Huanqing, priced and ready to go.

Project details

Hello, Sir. I am FusionZhu with more than 10 years of experience in Java and JavaScript development.
If you have any questions or needs in this regard, please contact me. You can pay when you are satisfied.
I will work on your requirement on hourly basis and the quote mentioned in the package is for 1 day.
Looking forward to hearing you.
Programming Languages
JavaScript, Java, Scala
Coding Expertise
Performance Optimization

What's included $200

These options are included with the project scope.

$200
  • Delivery Time 1 day
  • Number of Revisions 3
  • Number of Pages 1
    • Design Customization
    • Content Upload
    • Responsive Design
    • Source Code

Frequently asked questions

4.9
32 reviews
94% Complete
(30)
3% Complete
(1)
3% Complete
(1)
1% Complete
(0)
1% Complete
(0)

DC

Daniel C.
5.00
Oct 20, 2025
Urgent Help needed! Quick Pull Request Review Awesome help for the project I had to submit! I passed that round!

He even went above and beyond with suggestions after the review was done.

JH

Justin H.
5.00
Sep 4, 2025
Small change to Rust desktop application Thanks for your help, its working great.

BN

Brian N.
5.00
Oct 17, 2024
Rust Expert needed to fix my code

TB

Tandy B.
5.00
Jul 8, 2024
Chinese Translation Needed for Open Source Project - GitHub Issue Resolution (Immediate Start) Amazing job done very quickly! Would hire again for sure.

VW

Victor W.
5.00
May 22, 2024
Extract Job Traces from Yarn Logs Good to work with him.
Huanqing Z.Status: Offline

About Huanqing

Huanqing Z.Status: Offline
Full-stack Developer with Java JavaScript Rust and Big Data
100% Job Success
4.9  (32 reviews)
Shenzhen, China - 9:17 pm local time
I'm Huanqing Zhu, and you can call me Fusion. With over 10 years of hands-on Java development experience—including 6 years dedicated to big data processing and visualization—I’ve built my expertise by staying rooted in frontline coding, even as my responsibilities have grown. A key pillar of my technical toolkit is ‌6 years of production-grade Rust development experience‌, complemented by proficiency in Java, Scala, JavaScript, HTML5, and a full stack of big data and cloud-native technologies: Apache Spark, Hadoop, Hive, Flume, HBase, Storm, Kafka, DataX, ECharts, Docker, Kubernetes, and Linux.

What sets me apart is that I’ve never stepped away from writing production code, even as I’ve taken on leadership and architectural roles:

As a ‌hands-on Big Data Developer‌, I’ve built robust data ingestion utilities (including the open-source DataXServer on GitHub) and real-time page click analytics systems, directly coding pipelines to pull data from RDBMS, NoSQL databases, and file storage into production environments.
As a ‌Big Data Architect‌, I’ve led platform design while still contributing core code, using Hadoop, Spark, Flink, and ElasticSearch to build scalable data infrastructure—no abstract planning here; I’ve written the critical components that power these systems.
As a ‌Rust Specialist‌, my 6 years of experience spans building high-performance, low-latency systems. I’ve used Rust to optimize data processing pipelines, cut latency by up to 40% in high-throughput scenarios, and deliver systems that run 24/7 with zero critical errors.
As a ‌Team Leader‌, I’ve managed full-stack teams (Java, front-end, QA, operations) while still pairing with developers on complex code reviews and contributing to high-priority features, ensuring I stay connected to the day-to-day challenges of software delivery.

I also bring deep experience in microservices architecture and cloud-native containerization, and my cross-language expertise lets me bridge gaps between Java-based enterprise systems and Rust-powered high-performance components.

If you’re looking for a professional who combines strategic vision with the grit to deliver production-ready code—someone who can architect a system, and write the Rust or Java code that makes it run—I’m the candidate for you.

Thank you for reviewing my profile. I’m eager to discuss how my hands-on experience can add value to your team.

Steps for completing your project

After purchasing the project, send requirements so Huanqing can start the project.

Delivery time starts when Huanqing receives requirements from you.

Huanqing works on your project following the steps below.

Revisions may occur after the delivery date.

Understand the requirement

Communicate and confirm requirements with client

Prepare the required development environment

Such as running the client's code locally, and reproducing the issue that needs to be solved.

Review the work, release payment, and leave feedback to Huanqing.