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Project Title: Backend Developer for Multiplayer Online Project (Node.js, WebSockets, Blockchain) Project Description: We are seeking an experienced backend developer to join our team for the development of a long-term online project featuring multiplayer interaction, WebSockets, Ethereum blockchain integration ([login to view URL]), and deployment on AWS. The project requires handling high loads, scalability, and real-time user interactions. Tasks: Develop a scalable backend supporting numerous simultaneous connections with a waiting queue. Integrate blockchain authentication (MetaMask, Warpcast). Implement real-time mechanics (user movements, interactions, event notifications) using Socket.IO. Develop and optimize PostgreSQL database schemas. Manage user avatars: retrieval, image processing (sharp), storage on AWS S3. Implement data management systems and APIs for user interactions. Deploy and maintain the project on AWS (Elastic Beanstalk or ECS) using Redis. Conduct testing and optimize system performance. Responsibilities: Backend architecture design and implementation (Node.js, Express, [login to view URL]). Ethereum blockchain integration ([login to view URL]). Work with PostgreSQL and Redis. Deploy and manage AWS infrastructure (EB/ECS, S3). Collaborate closely with the frontend development team. Regular testing and debugging. Technology Stack: Node.js, Express, [login to view URL] PostgreSQL, Redis AWS (EB/ECS, S3, Elasticache, RDS) Ethereum blockchain ([login to view URL]) Communication: Telegram (quick communication) Google Docs (documentation and task tracking) Regular written reports Requirements: Experience with Node.js, WebSockets ([login to view URL]), and real-time systems. Experience with Ethereum blockchain integration ([login to view URL], MetaMask). Deep knowledge of AWS infrastructure (Elastic Beanstalk/ECS, S3, Redis). Proficiency with PostgreSQL and Redis. Ability to collaborate effectively with frontend developers. Expected Results: Functional and scalable backend AWS deployment with comprehensive documentation Detailed API and WebSocket interface documentation Database schemas and setup instructions We look forward to responses from responsible and experienced professionals eager to participate in this ambitious and exciting project!
Project ID: 39232833
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Active 1 yr ago
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Hi, I’m Truong Pham, an experienced backend developer with a strong background in building real-time multiplayer systems, blockchain integration, and handling high-load environments. I’ve worked extensively with Node.js, [login to view URL], PostgreSQL, Redis, and AWS, and I’m confident I can develop a scalable backend to support numerous simultaneous connections with a waiting queue. I’ll integrate Ethereum authentication with MetaMask/Warpcast using [login to view URL], implement real-time mechanics for user movements, interactions, and event notifications, optimize PostgreSQL schemas, handle avatar retrieval and image processing with sharp, and set up storage on AWS S3. I’ll also take care of deployment and maintenance on AWS (EB/ECS) and use Redis for performance optimization. My focus is on writing clean, well-documented code, ensuring smooth collaboration with your frontend team, and delivering a fully functional and scalable backend with comprehensive documentation. Let’s connect to bring this ambitious project to life. Thanks, Truong Pham.
$250 USD in 5 days
5.3
5.3
35 freelancers are bidding on average $20 USD/hour for this job

Hi, I see that you need NodeJS + WebSockets expert who can help with backend work and I am having very good experience with same. Kindly please share detailed info about exact list of things that you need done so that I can get better idea. Thank you.
$12 USD in 40 days
8.3
8.3

Dear Javid J., We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in Java, JavaScript, NoSQL Couch & Mongo, Node.js, Socket IO and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$25 USD in 5 days
7.7
7.7

Hi There, I’m excited to offer you a 25% discount on developing a robust online multiplayer system using Node.js. With over 7 years of experience in real-time gaming, WebSockets, and scalable backend development, I specialize in building smooth, lag-free multiplayer experiences with secure matchmaking, leaderboards, and game logic optimization. Let’s connect to discuss your game requirements, and I’ll deliver a high-performance, scalable multiplayer infrastructure tailored to your needs. Best regards, Sohail Jamil
$8 USD in 1 day
6.1
6.1

Hi there,Good evening I am Talha. I have read you project details i saw you need help with Node.js, Java, JavaScript, NoSQL Couch & Mongo and Socket IO I am pleased to present my proposal, highlighting our extensive experience and proven track record in delivering exceptional results. Our portfolio of success will showcase past projects that demonstrate our ability to meet and exceed client expectations. Glowing testimonials from satisfied clients will attest to our professionalism, dedication, and the quality of our work Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan
$25 USD in 22 days
5.1
5.1

Hello Dear! Good Day! Hope you are doing fine. This is Toriqul Islam . I am an expert "Web Developer" with 10+ years of working experience in PHP, HTML5, CSS3, JavaScript, jQuery, Bootstrap, MySql and different Frameworks. Hire me and you don't have to worry about your website problems again! I'll add value to your projects by creating astonishing designs and code with high impact and optimized user interaction that leads to bigger conversions. WHAT PROBLEMS CAN I HELP YOU SOLVE? Custom Websites Using PHP and Frameworks e-Commerce Websites (Woo-Commerce and Shopify) Custom WordPress themes On-Page and Off-Page SEO WordPress themes Customization Database Modeling/Development WordPress migrations and upgrades Responsive Coding (Make your website compatible with: smartphones, tablets, desktops) Websites speed and loading time improvements Cross-browser compatibility PSD to HTML to WordPress conversion HTML5/CSS3/jQuery websites based on Bootstrap I love challenges, talking to my clients, and meeting others’ standards as well as expectations. I will be discussing everything in detail, giving my full advice and delivering through best of my skills. You are cordially welcome to discuss your project. Thank You! Best Regards, Toriqul Islam
$12 USD in 40 days
4.9
4.9

Hi, hope you are doing well. With over 8 years of experience in backend development and a deep understanding of technologies like Node.js, WebSockets, and Ethereum blockchain integration, I am confident in my ability to contribute to your multiplayer online project. I have worked extensively with scalable backend architectures, real-time user interactions, and blockchain authentication (MetaMask, Warpcast). My experience with PostgreSQL, Redis, and AWS infrastructure will ensure seamless deployment and optimization of your system. I look forward to collaborating closely with your team to build a robust and high-performing solution. Regards, Adnan
$15 USD in 40 days
2.0
2.0

Hi Javid J. Good evening Already have something live to show you Live Similar Site work I have gone through your requirement , I found it very interesting , Since I already have similar live to show you As i had worked on these tech Node.js, JavaScript, NoSQL Couch & Mongo, Socket IO and Java I can Implement is the similar or with changes for you !!!! Let us discuss more about this Thanks
$30 USD in 30 days
0.5
0.5

Hi Javid J., I just checked your job post, and I see you need someone experienced in Java, JavaScript, NoSQL Couch & Mongo, Node.js and Socket IO. I have worked on similar projects before and would love to collaborate. Please review my profile to see my experience with these technologies. Before we proceed, I have a few questions: 1. Are there any additional requirements? 2. Is there existing work, or does this need to be built from scratch? 3. What is your deadline for this project? Why choose me? ✅ 250+ successful projects ✅ No bad feedback in the last 5-6 years ✅ 100+ recent 5-star reviews from happy clients I am available from 9 AM - 9 PM Eastern Time. I’ll share my past work in a private chat for privacy reasons. Looking forward to your response! Best regards, Zain R
$8 USD in 35 days
0.0
0.0

Hello, Javid J. I've done very similar project last month, so I have rich experiences and deep knowledge in JavaScript, Node.js, Java, NoSQL Couch & Mongo and Socket IO. I'd like to share my experiences with you. Best regards, Ilham
$24 USD in 26 days
0.0
0.0

✨ Hello! ✨ As a senior software engineer with over 12 years of experience, I am confident in this project. I have done many similar projects before and would like to discuss further details as I am the perfect fit for this project. I have over 6 years of experience in odoo and have solid experience in building custom dashboard and custom apps for odoo CRM. I would like to discuss further details via chat and looking forward to hearing from you soon. Kind Regards. Valerii.
$12 USD in 40 days
0.0
0.0

Hello there, Please share the requirements in detail so that i can analyze and come up with suitable solution, Moreover, I have 7 years of experience in Full Stack Development, I have successfully worked on numerous projects, ensuring seamless functionality and performance. Why Choose Me? Expertise in Shopify, WordPress, React, Node.js, PHP, Laravel Proficient in SEO & Google Ads to enhance online visibility Proven track record of handling similar projects efficiently Ability to provide scalable, secure, and optimized solutions Whether it’s developing a new platform, optimizing an existing one, or integrating advanced features, I bring a problem-solving mindset and a results-driven approach. Let’s schedule a call to discuss your project in detail and explore how I can contribute to its success. Looking forward to collaborating with you! Best Regards, S.K.
$12 USD in 40 days
0.0
0.0

Skilled programmer with 5 years of experience, specialized in Java, TypeScript. Ready to work and share some high quality time and expertise with tight and supportive team. Permanently looking for new challenges, exploring new technologies and improving all aspects of life.
$12 USD in 40 days
0.0
0.0

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