Hire the best Websockets Freelancers in Serbia

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$45 hourly
Vasilije R.
- 5.0/5
- (5 jobs)
Hello! I'm a professional Full-Stack developer with a strong focus on delivering comprehensive web solutions. With expertise in both Front-end and Back-end Development, I specialize in creating end-to-end web applications that are visually stunning, user-friendly, and robust under the hood. Leveraging the capabilities of Nest.js / React and Nest.js / Node.js, I can offer you a wide range of services, including: ✒️ Designing and developing modern, user-friendly User Interfaces (Tailwind CSS, Framer Motion) 📐 Pixel-perfect conversion of wireframes (Figma, XD, PSD) to Next.js / React 🔒 Crafting secure, scalable APIs (RESTful, GraphQL, WebSocket) 💾 Designing and developing databases with MySQL, PostgreSQL, or MongoDB 🧱 Designing and developing reusable React Components (Storybook) ⚙️ Building robust authentication and authorization systems 📧 Designing and developing Email Templates (React Email) 💵 Integrating payment gateways such as Stripe, PayPal, or 2Checkout 🪄 Implementing identity provider integration with Google, Facebook, or Microsoft 🎉 Seamlessly incorporating third-party APIs (RESTful, XML, WS) 🔥 Providing ongoing maintenance and support Here are some of my most recent achievements: 🔥 Designed and developed 15+ responsive pages (using Next.js and Tailwind CSS) and integrated them into 20+ GraphQL APIs and WS API, including authentication and PWA optimization for a Real-Time Chat Application that supports 1-1 and group conversations 🔥 Developed 100+ APIs and integrated over 10+ different 3rd-party providers including payment gateway integration with Stripe, PayPal, CoinPayments, and Payssion for Mobile Virtual Network Operator in the US 🔥 Designed and developed administrator dashboard and user flow pages (using React and Tailwind CSS) and integrated them into RESTful API for the NFC Card Management project in Australia 🔥 Converted 5+ pages of a legacy website into a new responsive React application for a construction company in Brazil Here is why you should choose me: ⭐ High-Quality Work ⭐ 100% Satisfaction ⭐ Over-delivery Guaranteed ⭐ Clear Communication ⭐ Daily Progress Updates ⭐ Clean Code, Best Practices ⭐ Lifetime Guarantee for written code 🏁 Let's discuss your project needs and how I can help you achieve your goals. 👋 Start TODAY by sending me a message, leave the rest to me. Keep in mind - satisfaction is guaranteed ;)

Websockets
MongoDB
MySQL
Node.js
Next.js
GraphQL
JavaScript
HTML
React
NestJS
Tailwind CSS
WordPress
CSS
Redux
Web Development
PHP
TypeScript
API
Web Design
$50 hourly
Nenad V.
- 4.9/5
- (93 jobs)
💻 Programming Languages 🟣 C# | 🔵 VB.NET | 🟢 SQL | 🟡 JavaScript/TypeScript | 🟠 Node.js ☁ Cloud Platforms 🔹 Azure: AppService, Functions, ServiceBus, CI/CD (GitHub Actions), CosmosDB, VM 🔹 AWS: Lambda, DynamoDB, EC2 (VM) 🔹 Google Cloud: Firebase 🏗 ORM & Data Access 🟢 Entity Framework | 🔵 Dapper | 🔸 ADO.NET | 🟠 LINQ 🌐 Backend Development ✔ ASP.NET Web Forms/MVC | ✔ Web API | ✔ SignalR ✔ Blazor (Server & WebAssembly) | ✔ MAUI ✔ WCF Data Services | ✔ IdentityServer/Duende | ✔ Keycloak ✔ MediatR (CQRS & Request/Response Patterns) ✔ Node.js (Express, Fastify, NestJS, WebSockets, WebRTC) 🎨 Frontend & UI Technologies 🔹 React | React Native 🔹 AngularJS 1.5+ / Angular 2+ 🔹 jQuery | Bootstrap 3,4,5 | Material Design 🔹 WebRTC (Real-time Audio/Video Communication) 📱 Mobile & Hybrid Development 🔹 Ionic | NativeScript | Xamarin | MAUI | React Native 🖥 Desktop Development 🔹 WPF | WinForms | UWP | MAUI 🗄 Database & Data Storage 🔹 Relational Databases: MS SQL Server (2000 - 2016) | PostgreSQL | SQLite | Oracle (9i, 10i, 11i) | MS Access | MySQL 🔹 NoSQL & Vector Databases: MongoDB | RavenDB | Firebase Firestore Elasticsearch (Full-text search) | Qdrant | Pinecone (Vector Search & AI-based Retrieval) 🏢 Operating Systems 💠 Windows | 💠 Unix/Linux 🚀 Frameworks & Architecture 🔹 .NET Framework 2.0 - 4.8 | .NET Core 3+ 🔹 Blazor (Server & WebAssembly) | MAUI 🔹 Node.js (Express, Fastify, NestJS) 🔹 IdentityServer/Duende, Keycloak 🔹 MediatR (CQRS, Request/Response & Notification Handlers) 🔹 UnitOfWork & Repository Pattern 🔹 Async/Parallel Execution 🤖 AI & Machine Learning 🟠 OpenAI (GPT, Codex, DALL·E, etc.) 🟣 Ollama (Fine-tuning & RAG) 🟢 ML.NET (Machine Learning for .NET) 🔵 ONNX Runtime (Optimized AI Model Inference for .NET) 🔥 Why Work With Me? ✅ Over 15 years of hands-on experience in multi-tier development, relational databases and business applications. ✅ Extensive experience in HR, GIS, Medical, Real Estate, GPS Tracking, Ecommerce and Commercial Software Development. ✅ Strong expertise in web applications, including REST/OData, GraphQL, SOAP/XML services. ✅ Advanced database design skills, including complex SQL queries, stored procedures and performance tuning. ✅ Strong network administration background (MCSA Certified). ✅ Excellent analytical skills, adaptable to evolving technical environments. ✅ Proficient in front-end, back-end, cloud, AI, real-time communication (WebRTC) and DevOps, ensuring end-to-end software development expertise. 📩 Let’s Connect! 🚀 Looking for a reliable full-stack .NET & Node.js developer to elevate your business? Let's talk!

Websockets
AI Development
AI Chatbot
.NET Core
JavaScript
ASP.NET Web API
Angular
OAuth
Google Maps API
MongoDB
C#
Visual Basic
SQL
RESTful API
ASP.NET Core
$60 hourly
Aleksandar J.
- 5.0/5
- (40 jobs)
🖥 You need a full-scale web app or API developed in Symfony? 🐘 Your custom PHP project has a weird bug which nobody could resolve? 🛠 Need your WordPress website fixed? ↔ You need integration of 3rd party APIs that no plugin or bundle can resolve out of the box? 🐧 Need your Linux server examined and fixed? 👍 In these, and many other cases, I guarantee you won't regret hiring me. With 21 years of experience, I worked on multiple software projects with international clients and teams. I am able to create back-ends of digital products and services from scratch and use my strong problem-solving capabilities and vast experience to track down the causes of errors in order to resolve them. 👩‍🚀 SKILLS: 🐘 PHP - Symfony 2/3/4/5, Drupal, WordPress, eZPlatform, swoole - specialized 🌎 Javascript, Typescript, HTML, CSS, SCSS, MySQL, PostgreSQL - everyday use 💻 DevOps - Linux-based systems - Apache, nginx, Vagrant, Docker, Ansible, bash, AWS, Azure - regular usage 🐍 Python - Flask - regular usage ☀️ MOTIVATION: I love the web and everything related to it. The possibility to publish your ideas quickly and make them available to the entire world is what made me decide to pursue a career in web development. I also believe in freedom and open source.

Websockets
Sulu CMS
Flask
Doctrine ORM
Symfony
Amazon Web Services
Linux System Administration
Ubuntu
Git
TypeScript
Python
WordPress
JavaScript
API
Drupal
PHP
$40 hourly
Veljko V.
- 0.0/5
- (0 jobs)
I am a highly skilled software engineer with over 7 years of experience in web and mobile development, including more than 5 years specializing in WebRTC, VoIP, Video-on-Demand (VoD), Over-the-Top (OTT) media services, and live streaming technologies. My expertise lies in building scalable, high-performance real-time communication systems, interactive media applications, and cloud-based streaming solutions. 💡 Key Strengths: ✔ Deep knowledge of WebRTC, SIP, RTP, FFmpeg, Janus, Twilio, Zoom, AWS Chime, AWS KVS, Mediasoup, Kurento, FreeSwitch, Jitisi ✔ End-to-end development of VoIP & live streaming platforms ✔ Strong backend skills in Node.js, Python, and microservices architecture ✔ Frontend development with React, Next.js, and modern UI frameworks ✔ Experience with AWS, Azure, Docker, and Kubernetes for scalable deployment ✔ Optimization of video encoding, transcoding, and low-latency streaming ✔ AI with LLMs, ML, NLP, OpenAI, GPT, LangChain, DeepSeek. I am passionate about delivering seamless real-time communication experiences and optimizing video delivery for global audiences. Always eager to tackle complex technical challenges and push the boundaries of interactive media solutions. 🚀

Websockets
Video.js
Tizen
Fire OS
tvOS
Roku Development
Twilio
VoIP
GStreamer
Socket Programming
Socket.io
FFmpeg
WebRTC
Web Development
Mobile App
$35 hourly
Nemanja C.
- 0.0/5
- (0 jobs)
I'm a full-stack developer with 13+ years of experience building web apps, APIs, and internal tools using TypeScript, React, and Node.js. I’ve led projects from idea to production for startups and enterprise clients alike. 🔧 Skilled in: Typescript, React, ReactNative, Express, MySQL, Automated testing 🧠 Experience with SaaS, real-time systems, and payment integrations 📈 I care about clean code, long-term maintainability, and real business value 💬 I believe in clear, proactive communication and reliable delivery Whether you need a full-featured app, a polished MVP, or someone to join your dev team part-time — I’m here to help.

Websockets
Web Development
MySQL
Cypress
Unit Testing
Next.js
ExpressJS
TypeScript
React Native
React
Web Application
App Development
$30 hourly
Milan M.
- 4.9/5
- (54 jobs)
Greetings! I am a VoIP engineer and FreeSWITCH developer with a strong track record in crafting cutting-edge solutions for the telecommunications industry. With a deep passion for VoIP technologies and a proven ability to develop custom core FreeSWITCH modules, I bring a wealth of knowledge and hands-on experience to your projects. VoIP Mastery: I possess an in-depth understanding of VoIP protocols, SIP, RTP, and their intricacies. My expertise extends to creating robust, high-performance VoIP systems. FreeSWITCH Wizardry: As a FreeSWITCH specialist, I have a knack for developing bespoke core modules tailored to unique project needs. From call routing and media processing to custom application integration. Custom Solutions: I thrive on crafting tailored VoIP solutions that cater to specific business requirements. Whether it's enhancing call quality, optimizing network performance, or creating innovative applications. Technologies & Skills: FreeSWITCH Core Module Development VoIP Protocols (SIP, RTP) Call Routing & Media Processing Real-time Communication Apps WebRTC Integration Network Performance Optimization

Websockets
VoIP Administration
WebRTC
C
Session Initiation Protocol
VoIP Software
FreeSWITCH
C++
$40 hourly
Roman K.
- 0.0/5
- (0 jobs)
Hello, I am a Full Stack Developer. (Senior Developer), and mostly worked in the Web and Blockchain. Type of projects i have already worked on as follows :- 1) Social Media Application On React Native Platform 2) Web App Development 3) CRM Development 4) APIs development 5) Wordpress website development ( Blog + E-commerce ) 6) Web Based POS Systems 7) Web Based ERP system ( Hotel Management System , Hospital Management System , Clinic Management System etc.) Etc. My Skills are as followes :- For Web and APIs development :- 1) php ( Laravel , CI ) 2) Node.js 3) python For Front End Development :- 1) HTML , CSS , BOOTSTRAP 2) React.js 3) Angular.js 4) Next.js 5) Express.js 6) Nuxt.js 7) Vue.js CMS Development:- 1) WordPress 2) eCommerce Platform ( Shopify, Magento, Prestashop, ) Feel free to share your project requirements related to my skills, will provide you with the best and best-priced service.

Websockets
Back-End Development
Front-End Development
CodeIgniter
React
CSS
Laravel
PHP
Angular
Node.js
JavaScript
WordPress
HTML
Web Development
Vue.js
$30 hourly
Pavel F.
- 5.0/5
- (1 job)
Full-stack developer skilled in JavaScript, TypeScript, React, Redux, Next.js, and Node.js. Experienced in modern stacks for web application development. I have experience in independently managing a number of mid-size projects from prototype to launch. Proficient in implementing both novel (e.g., generative AI) and established technologies for practical solutions. Constantly learning and staying up to date with the new technological trends. Developed of various mini-services from conceptualization until launch (e.g., processing spreadsheets, filtering data, trading bot logic) using TypeScript, Next.js (Server Actions, Route Handlers), Node.js, and Supabase (PostgreSQL). • Created the supporting REST APIs from scratch and worked with WebSockets. • Implemented authentication using Supabase Auth. • Deployed the application using PM2, nginx. Managed multiple projects and landing pages both independently and within a small team. Created web services for internal use. Implemented SSR and SSG. Collaborated with a backend developer on task prioritization and architecture discussions. My contributions included but not limited to: • Aggregator website. Built custom CMS solutions. Delivered adaptive, cross-browser, pixel-perfect front-end layouts, and integrated microdata. Conducted SEO, performance optimization (PageSpeed Desktop 90+). • Service for ad analytics. Creating interfaces for processing data and analyzing advertisements from various platforms. • Services for AI-driven operations. Developed an interactive graph-based constructor board (React Flow) for creating custom scenarios for interacting with AI.

Websockets
REST API
Git
NGINX
CI/CD
CSS
HTML
Full-Stack Development
Front-End Development
Redux
Node.js
Next.js
React
TypeScript
JavaScript
$15 hourly
Mikhail V.
- 0.0/5
- (0 jobs)
I have been working as a QA Engineer since 2019, gaining experience across various industries, from advertising to the financial sector. My expertise includes both manual and automated testing. I have worked on testing the front end and back end parts of applications using a wide range of tools and testing techniques. I have also mentored new employees and value active communication with all teams in projects. I am seeking new opportunities for growth.

Websockets
Jenkins
PyCharm
Linux
Docker
Jira
Git
SQL
GUI Testing
Functional Testing
Postman
API
Test Results & Analysis
Software QA
Quality Assurance
$30 hourly
Danijel N.
- 0.0/5
- (0 jobs)
I am a full-stack developer with over 8 years of experience in creating web applications. I specialize in React.js and Next.js for front-end development, and Node.js for back-end solutions. I have successfully built e-commerce sites and real-time applications that engage users. I am skilled in using RESTful APIs and GraphQL for data integration. I also implement communication features with Twilio and NodeMailer for SMS and email notifications. Additionally, I have experience integrating payment solutions like Stripe and PayPal to ensure secure transactions. My experience with AWS and databases like MySQL and MongoDB helps me build scalable solutions. I focus on delivering high-quality work and continuously look for ways to improve user experiences. Skills: Frontend Technologies: Languages & Technologies: HTML5, CSS (Less/Sass/SCSS, Tailwind CSS, Bootstrap), JavaScript, jQuery Frameworks: React.js, Next.js, Vue.js(Vue2, Vue3) Backend Technologies: Languages & Frameworks: Node.js, Express.js, Nest.js Databases: MySQL, MongoDB, Google Firebase APIs: RESTful APIs, GraphQL, API Integration Cloud & DevOps: AWS, Socket.io Communication Services: Twilio Email Services: NodeMailer Payment Integration: Stripe, PayPal Content Management Systems: Strapi CMS Testing & Collaboration Tools: Git, Slack, Jira, Trello Experience: I have successfully led the development of various projects, including: E-commerce Platform: Developed a feature-rich e-commerce site using React.js and Node.js, resulting in a 30% increase in sales within the first month of launch. Real-Time Chat Application: Built a scalable real-time chat application leveraging Socket.io and Firebase, enhancing user engagement and communication. Twilio Integration: Implemented Twilio for SMS notifications and communication features, improving user interaction and engagement. Email Notifications: Utilized NodeMailer to set up email notifications, ensuring timely communication with users. Payment Solutions: Integrated payment gateways such as Stripe and PayPal, ensuring secure and smooth transactions for users. Education: Bachelor’s Degree in Computer Science from IT Academy. Certifications: Full-Stack Web Development Certification AWS Certified Solutions Architect

Websockets
MongoDB
Strapi
Stripe
Twilio
Socket.io
RESTful API
MySQL
ExpressJS
NestJS
Node.js
Vue.js
Next.js
React
JavaScript
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