Hire the Best Websockets Professionals

Clients rate our Websockets Professionals
Rating is 4.7 out of 5.
4.7/5
Based on 491 client reviews
M Rizki K.

Kampar, Indonesia

$3/hr
4.6
46 jobs

I’m a Software/AI & VPS Engineer, I can fix anything with zero mistakes n build everythings easily n fastest, i got unlimited Codex token, love to do things OpenClaw, Blockchain, Pipeline, flutter, flutterflow, build tools, Internal tools, Modules, Bot, PineScript, Mod, sys Linux n i can copy any site 100% match quick n easy n i strong in backend and full-stack systems and build Web apps, Mobile Apps, Desktop Apps, Rust/Tauri, Electron, Browser Extension n trading system, n strong Web3 edge (EVM, Stellar & Solana). I turn ambiguous ideas into secure, reliable, human-centered products using TypeScript/JavaScript, React/Next.js, Node.js/Nest, Go, Python, Solidity, Rust (Anchor), and modern infra. I care about clean architecture, measurable impact, and great developer experience (DX) also so features ship fast and safe, also love building an Apps & AI things. for the security side, I bring pentest/audit mindset to every build: threat modeling, fuzzing & invariants, automated checks in CI, and clear, actionable reports. I also provide English technical translation/localization for whitepapers, docs, and UI strings. Languages: TypeScript/JavaScript, Vue, Go, Python, Solidity, Rust (Anchor), Php, Ruby, C & C++ Frontend: React, Next.js, Tailwind, Radix/shadcn, Vite, SSR/SSG/ISR, Flutter Backend: Node.js (Nest/Express/Fastify), Go (Gin/Fiber), GraphQL, REST, gRPC, WebSockets Web3: Solidity, Rust/Anchor, Hardhat, Foundry, OpenZeppelin, viem/wagmi, ethers.js, WalletConnect v2, Safe, The Graph, IPFS Testing: Jest/Vitest, Playwright, Supertest, Foundry (fuzz/invariants), Slither, Echidna Data: PostgreSQL, MySQL, SQLite, Prisma/TypeORM/Knex, Redis DevOps: Docker, GitHub Actions, basic K8s, AWS/GCP basics, Sentry, OpenTelemetry, Tenderly, OpenZeppelin Defender Security: OWASP ASVS/API, RBAC/ABAC, token design, key/secret rotation, rate limiting & anomaly detection, audit reports DeFi staking: with upgradeable proxies storage-safe upgrades, 0 criticals in audit NFT marketplace royalty splits, subgraph indexing, gas-optimized listings Solana program PDA-secured escrow with CPI, wallet-adapter UX, >95% test coverage Payments & off-chain settlement Webhooks + queues, idempotent APIs, chargeback handling Security engagement BOLA/IDOR class bugs identified; implemented header-precedence fixes & authZ binding

  • Blockchain Architecture
  • Web Development
  • NFT
  • App Development
  • iOS Development
  • Web Application
  • Product Development
  • Android App Development
  • Web3
  • Flutter
  • Full-Stack Development
  • AI Builder
  • Flutter Stack
  • Technical SEO
  • Linux
Minh Tri P.

Ho Chi Minh City, Vietnam

$7/hr
5.0
4 jobs

I build AI-powered automations that take repetitive work off your team — customer support, document processing, email triage — so people focus on what matters. I'm a software engineer with 3+ years shipping production apps to the App Store, Google Play, and Microsoft Store — including automation systems for Suntory PepsiCo factories and a healthcare IoT platform. That's my edge over no-code-only freelancers: I write custom code where visual tools fall short — error handling, API integration, validation — so what I build survives real input, not just the demo. Recent projects: AI Support Agent — Telegram/WhatsApp bot answering customer FAQs 24/7 from a knowledge base clients edit themselves. Remembers context, stays on-topic, hands off to humans instead of inventing answers. CV Screening — extracts and scores résumés against a job description with vision AI, logs to Google Sheets. Email Classifier — auto-tags and routes incoming Gmail by category and priority. Stack: n8n, AI Agents (memory + tools), Gemini/Claude/OpenAI, Telegram/WhatsApp/Gmail, REST APIs, webhooks, data extraction, custom JavaScript. I also build Flutter mobile apps with AI-powered n8n backends — so if you need the app and the automation, I ship both.

  • Dart
  • Flutter
  • Kotlin
  • Flutter Stack
  • Mobile App Development
  • App Development
  • Mobile App
  • React
  • Java
  • Claude
  • OpenAI Codex
  • Gemini
  • n8n
  • Claude 3.5 Sonnet
  • Chatbot Development
  • AI Agent Development
  • Testing
Maaz J.

Karachi, Pakistan

$25/hr
5.0
12 jobs

You have something that needs to be built and I'll make sure you get it right in one go, without having to repeat yourself or explain it twice. You get a corporate freelancer and Full-Stack JavaScript Engineer with 6+ years of experience, taking full ownership of getting it done whether that's a complete SaaS platform or a small tool that just needs to work. Some of you come in with a fully-scoped MVP. Others just have a problem to solve, a workflow to automate, or a small platform that needs structure. Either way, you're covered. This is probably why you're here: - You have an idea and just need someone to build it no months of back-and-forth. - You've launched something, but it's underperforming, and you want someone who can figure out why and fix it. - Your current setup code, spreadsheets, manual processes, whatever it is has turned into a liability, and you want it working for you instead. - You want one person who takes full ownership, not a committee or a rotating cast of freelancers. HERE'S WHAT YOU GET You get someone who works across the full product surface React and Next.js on the frontend, Node.js and NestJS on the backend, React Native for iOS and Android, and PostgreSQL, MongoDB, Firebase, or Supabase, whichever actually fits what you need. That could mean a multi-tenant SaaS platform, or it could just as easily mean a small dashboard, a booking system, or automating something you're currently doing by hand. You get a solution sized to your actual problem — not something over-built to justify a bigger invoice. And you get someone who stays through delivery, not someone who hands you off or disappears the moment it's live. WHAT THIS MEANS FOR YOU DAY TO DAY You don't get a developer who just ships features and moves on. You get someone thinking about what happens after will this retain your users, will it save you time, will it hold up as things grow. Faster load times aren't a technical detail to you, they're fewer people dropping off. A clean, simple build isn't about elegant code to you, it's you not needing to hire someone else in six months to understand what was done. That's the difference between getting an application and getting your actual problem solved. THE STACK YOU'RE GETTING Web: React, Next.js, Angular, Node.js, NestJS, Express, Python (Django, Flask) Mobile: React Native (iOS and Android) Databases: PostgreSQL, MongoDB, Firebase, Supabase, SQL Cloud/DevOps: AWS, Docker, CI/CD pipelines Auth & Payments: Stripe, Supabase Auth, Firebase Auth, JWT AI: OpenAI APIs, LLM integrations, AI automation, chatbot and workflow integrations BEFORE WE START Doesn't matter if what you're building is a five-figure platform or a small tool you need running by next week message me and tell me what you're trying to solve. You'll get a straight answer on scope, timeline, and whether I'm the right fit for it.

  • Front-End Development
  • Back-End Development
  • Full-Stack Development
  • JavaScript
  • React
  • Next.js
  • React Native
  • MongoDB
  • Mobile App Development
  • Android App Development
  • API Integration
  • UX & UI
  • Node.js
  • Stripe
  • PostgreSQL
Ali H.

Lahore, Pakistan

$15/hr
5.0
5 jobs

I build scalable backend systems, high-performance web apps, and cloud-deployed APIs. As a Full Stack Engineer with 5+ years of production experience, I don't just write code I architect systems that reliably handle scale, edge cases, and international markets. From designing PostgreSQL schemas to deploying on AWS and GCP with automated CI/CD, I lead product cycles from zero to launch. 🔧 WHAT I SPECIALIZE IN ✅ Backend Development: Node.js, Express.js, Next.js, and FastAPI. I build secure REST APIs handling complex business logic, JWT/OAuth authentication, and high production loads. ✅ Full Stack Web Apps: React.js, TypeScript, Redux Toolkit, and RTK Query. I deliver responsive, production-ready frontend architectures seamlessly integrated with scalable backends. ✅ Cloud & DevOps: AWS (EC2, S3), GCP Cloud Run, Docker, and GitHub Actions. I treat DevOps as a priority, ensuring zero-downtime CI/CD deployments and reliable infrastructure. ✅ Payment & Fintech: Stripe, e-wallets, referral commission systems, and multi-currency abstraction. Experienced in webhook idempotency, signature validation, and reconciliation. ✅ AI Integrations: OpenAI GPT, Whisper API, and Hugging Face GPU deployments. I build full-stack AI platforms with independent pipelines via REST APIs. ✅ Databases & Real-Time: PostgreSQL, MongoDB, Prisma. Normalized schemas and optimized queries. Real-time chat and live data sync using Socket IO and Firebase. 🚀 PRODUCTION WORK I'VE SHIPPED * Ojiyo & E-Commerce Marketplaces: Built real-time messaging, e-wallets, live order tracking, and automated commission systems at production scale. * Dress Genie: Full-stack AI virtual try-on platform with 3 independent Python AI pipelines running on Hugging Face GPU infrastructure. * Fintech Infrastructure: Built a country-specific payment abstraction layer enabling seamless expansion across 3 international markets. Managed secure Stripe webhook integrations. * Cloud Operations: Executed S3 data migrations and lifecycle management. Configured Node.js backends on AWS/GCP with full CI/CD automation and performance monitoring. 🛠️ TECH STACK * Languages: JavaScript, TypeScript, Python, SQL * Backend: Node.js, Express.js, Next.js, FastAPI, Nest.js * Frontend: React.js, Redux Toolkit, Tailwind CSS, Bootstrap * Databases: PostgreSQL, MongoDB, Firebase, Prisma, Mongoose * Cloud & DevOps: AWS, GCP, Docker, GitHub Actions, Shell Scripts * APIs & Payments: Stripe, OpenAI, Socket IO, GraphQL 🏆 ACHIEVEMENTS & CREDENTIALS * Winner: VisioSpark Web Development Hackathon, COMSATS University. Won 1st place building a full-stack web application under strict time pressure. * Top Rated: "Ali is a very professional web developer. It was my best experience working with him." 5-Star Upwork Client. * Education: BS Computer Science, COMSATS University Islamabad. 🤝 HOW I WORK WITH CLIENTS * Proactive communication and regular updates (PKT timezone, overlapping EU/US mornings). * Clean, documented, and maintainable code. * Requirements fully clarified before writing a single line. * Comfortable collaborating with technical founders and non-technical clients alike. 📩 LET'S WORK TOGETHER Need a backend API, a full-stack web app, cloud deployment, Stripe integration, or an AI-powered feature? Send me a message with your project details, and I'll respond within a few hours with my approach. Let's build something great.

  • Web Development
  • Node.js
  • Front-End Development
  • Back-End Development
  • Database
  • Database Design
  • CI/CD
  • MERN Stack
  • Amazon EC2
  • Payment Gateway Integration
  • Google Cloud Platform
  • Stripe API
  • Socket.io
  • Amazon Web Services
  • TypeScript
  • React
  • PostgreSQL
  • Docker
  • Next.js
  • REST API
Zakriya K.

Islamabad, Pakistan

$30/hr
4.7
38 jobs

⚡ Top Rated Plus | 100% Job Success | 8+ Years | AI SaaS Web & Mobile Apps I design, build and scale AI‑powered SaaS, web and mobile apps that actually ship, get users, and stay maintainable – not shiny AI demos that break in production. If you're a founder or product team and you need one engineer who can own your AI product end‑to‑end (React/Next.js web + React Native mobile + Node.js backend), you're exactly who I build for. 💡 What I help you ship Production‑ready AI SaaS dashboards and web apps (React / Next.js frontend, Node.js backend). Cross‑platform mobile apps in React Native (iOS & Android), integrated with your existing APIs and backend. AI chatbots and in‑app assistants for support, onboarding and internal knowledge bases (OpenAI‑style APIs, retrieval‑based Q&A). Content & workflow automation tools (summarization, drafting, text processing, data pipelines). New AI features inside existing products (smart search, recommendations, Q&A, document helpers, etc.). Robust APIs & backend systems (Node.js, Express.js, Nest.js, REST, GraphQL, background jobs). Database design, migrations and performance tuning (PostgreSQL, MySQL, MongoDB, DynamoDB, Firebase). Refactoring and performance optimization for existing React / React Native / Next.js / Node.js apps. 🛠 Tech I'm confident with Frontend: React, Next.js, TypeScript, Tailwind CSS, Material UI. Mobile: React Native (iOS & Android), Expo or bare workflow. Backend: Node.js, Express.js, Nest.js, REST APIs, GraphQL. AI & Python: OpenAI‑style APIs (chat/completions), retrieval‑based Q&A, Python services for data processing & automation. Databases: PostgreSQL, MySQL, MongoDB, DynamoDB, Firebase. DevOps & Cloud: AWS, Docker, CI/CD, Serverless. Realtime & Automation: WebSockets, Firebase, Playwright, Puppeteer, Selenium. 🏆 Why AI/SaaS clients work with me AI as a useful feature, not a gimmick – we start from your business use‑case and user flows, then design the AI around that. End‑to‑end partner – architecture, implementation, testing, deployment and iteration, not just "code delivery". Strong Upwork record – Top Rated Plus, 100% Job Success and fully satisfied, repeat clients. Clear, async‑friendly communication – regular updates, realistic timelines, and no vague promises. 📩 Tell me about your AI product Whether you're: validating a new AI‑driven MVP (web or mobile), or adding AI features to an existing SaaS / web / React Native app I can help design the architecture, ship the first version fast, then harden it for real users.

  • Websockets
  • React Native
  • React
  • Next.js
  • Node.js
  • TypeScript
  • JavaScript
  • SaaS Development
  • Web Application Development
  • GraphQL
  • NestJS
  • API Integration
  • Amazon DynamoDB
  • Supabase
  • Redux Form
  • AI Chatbot
  • Jest
  • Cypress
  • Stripe
  • Code Refactoring
Somesh L.

Kotdwara, India

$10/hr
5.0
1 jobs

I build and rescue production web & mobile apps end-to-end. As the sole engineer at my current company, I own an LMS, a CRM, 3 websites and 2 published mobile apps — including a live video classes system I built from scratch with WebRTC and mediasoup that handles 100+ concurrent users. What I do best: • Real-time systems — WebRTC, mediasoup, WebSockets: live video, multiplayer games, chat, anything that updates in real time • Rescuing broken or abandoned projects — I've taken over half-finished codebases and shipped them to production: a broken LMS turned into a live learning platform, a dead CRM revived and now managing 5,000+ leads • Frontend that feels premium — React, Next.js, Tailwind, GSAP animations • React Native apps — built, released and published to both the Play Store and App Store (EAS builds, store review process included) • AI integration — LLM-powered features like document scanning that auto-fills forms I also handle deployment and infrastructure myself (AWS, DNS, MySQL, CI), so you deal with one developer who owns the whole thing — not five people pointing at each other. If your project is stuck, half-built, or needs real-time features that actually work at scale, send me a message and I'll tell you honestly what it needs.

  • Websockets
  • Artificial Intelligence
  • iOS Development
  • Android App Development
  • Mobile App Development
  • Web Development
  • Front-End Development
  • React
  • Next.js
  • TypeScript
  • JavaScript
  • Node.js
  • React Native
  • WebRTC
  • Laravel

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Don't just take our word for it

WebSocket Freelancer Hiring FAQ

What is a WebSocket freelancer?

A WebSocket freelancer develops HTML5 web, desktop, and/or mobile applications using a computer communications protocol known as WebSocket. WebSocket API technology opens two-way interactive communications over a single TCP connection.

How do you hire a WebSocket freelancer?

You can source WebSocket freelancer talent on Upwork by following these three steps:

  • Write a project description. You’ll want to determine your scope of work and the skills and requirements you are looking for in a WebSocket freelancer.
  • Post it on Upwork. Once you’ve written a project description, post it to Upwork. Simply follow the prompts to help you input the information you collected to scope out your project.
  • Shortlist and interview WebSocket freelancer. Once the proposals start coming in, create a shortlist of the professionals you want to interview. 

Of these three steps, your project description is where you will determine your scope of work and the specific type of WebSocket freelancer you need to complete your project. 

How much does it cost to hire a WebSocket freelancer

Rates can vary due to many factors, including expertise and experience, location, and market conditions.

  • An experienced WebSocket freelancer may command higher fees but also work faster, have more-specialized areas of expertise, and deliver higher-quality work.
  • A contractor who is still in the process of building a client base may price their WebSocket development services more competitively. 

Which one is right for you will depend on the specifics of your project. 

How do you write a WebSocket freelancer job post?

Your job post is your chance to describe your project scope, budget, and talent needs. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample WebSocket freelancer job post titles:

  • WebSocket developer needed to build and maintain stock related app
  • Seeking full-stack developer with WebSocket expertise for medical startup
  • Looking for an experienced WebSocket developer to code review and audit mobile app

Project description

An effective WebSocket freelancer job post should include: 

  • Scope of work: From setting up server infrastructure to SSL certification, list all the deliverables you’ll need. 
  • Project length: Your job post should indicate whether this is a smaller or larger project. 
  • Background: If you prefer experience with certain industries, software, or coding languages, mention this here. 
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

WebSocket freelancer job responsibilities

Here are some examples of WebSocket freelancer job responsibilities:

  • Design, monitor, and maintain backend applications and automation
  • Use WebSocket to support dynamic, custom web apps with responsive design
  • Build and implement APIs, features, and services to meet organizational goals

WebSocket freelancer job requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in WebSocket freelancer. Here are some examples:

  • Understand the technology behind cross-browser, bi-directional communication between server and client
  • Familiarity with C(++), Python, PHP, or server-side JavaScript
  • Ability to leverage implementations with Objective-C, .NET, Ruby, Java, node.js, and/or ActionScript and other languages