Java Spring Developers For Hire
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Hire nguyenn303
I am a Senior Full Stack Developer from Vietnam with over 10 years of experience in frontend, backend, and full-stack development. My main strength is building clean, responsive, high-performing web applications, while also delivering scalable backend systems, APIs, dashboards, automation tools, and blockchain...I am a Senior Full Stack Developer from Vietnam with over 10 years of experience in frontend, backend, and full-stack development. My main strength is building clean, responsive, high-performing web applications, while also delivering scalable backend systems, APIs, dashboards, automation tools, and blockchain solutions. Skills & Expertise Frontend Development React.js, Next.js, Angular, Vue.js, JavaScript, TypeScript, HTML5, CSS3, SCSS, Tailwind CSS, Bootstrap, Material UI, Responsive UI/UX, Canvas, Performance Optimization Backend Development Node.js, NestJS, Express.js, Django, RESTful APIs, GraphQL, WebSocket, Socket.io, Microservices, API Design, Authentication & Authorization, Payment Gateway Integration, Real-Time Systems Databases & Data Management MongoDB, PostgreSQL, MySQL, Redis, Firebase, Supabase, Database Design, Query Optimization, Data Modeling, Caching, Prisma, TypeORM, Mongoose Programming Languages TypeScript, JavaScript, Python, Go, C++, Rust, C#, Move DevOps & Cloud AWS, DigitalOcean, Vercel, Netlify, Docker, Nginx, CI/CD, GitHub Actions, Linux Server Management, Scalable Deployment Systems, Monitoring, Logging Blockchain & Web3 Solana, SUI, DeFi, dApps, Smart Contracts, Solana Smart Contracts, Trading Bots, Wallet Integration, Token/NFT Development, Bitcoin Ordinals, Web3.js, Ethers.js AI & Automation AI-Powered Web Applications, LLM API Integration, Automation Scripts, Data Processing, AI Workflow Integration, Chatbot Development, Telegram Bot Automation Software Architecture & Engineering SaaS Development, Scalable System Design, Clean Code, Agile Development, Git/GitHub Workflow, Testing & Debugging, Code Review, Security Best Practices, API Security Notable Projects Job Portal Systems, Booking Platforms, Social Media Platforms, Trading Management Systems, Employee Management Systems, E-Commerce Websites, Admin Dashboards, CRM/ERP Systems, Web3 dApps, Solana Trading Bots, Smart Contracts, and Telegram Automation Bots. What I Can Offer • High-quality, responsive frontend development with modern UI/UX • Scalable and secure backend systems built for performance • REST/GraphQL API development and third-party integrations • Blockchain solutions, smart contracts, trading bots, and dApps • AI automation, chatbot workflows, and process automation • DevOps support for smooth deployment, CI/CD, and production stability I focus on clean communication, reliable delivery, maintainable code, and long-term client relationships. I enjoy working with clients who value quality, clear requirements, and practical solutions. Let’s collaborate to turn your ideas into reliable, scalable, and successful digital products. less -
Hire yaircastro
I began my journey in the technology field seven years ago, dedicating most of that time to IT and networking. Passionate about challenges, I am constantly seeking knowledge and striving for excellence in software development. I take great pride in my work and enjoy keeping up to date with the latest trends. I am...I began my journey in the technology field seven years ago, dedicating most of that time to IT and networking. Passionate about challenges, I am constantly seeking knowledge and striving for excellence in software development. I take great pride in my work and enjoy keeping up to date with the latest trends. I am always committed to the quality of my work and meeting timelines. I primarily develop web applications and can work on both back-end and front-end tasks. - Backend: · Node.js & Express.js, Nest.js · Python & Django, Flask · Java & Spring, Hibernate, JSF · C# & ASP.NET · PHP & Laravel - Frontend: · JavaScript & TypeScript · Vue.js, React, Angular - DB: · MySQL, PostgreSQL, Oracle Database, Microsoft SQL Server · MongoDB, CouchDB, Redis, DynamoDB, Cassandra, Neo4j, ArangoDB - Development Practices: · Agile Methodology & Scrum · Unit Testing: B: PHPUnit, JUnit, NUnit, unittest, pytest F: Jest, Mocha · Version Control: GitHub, GitLab, Bitbucket I bring the skills and dedication necessary to successfully achieve your project's goals. If you're interested in my profile, please feel free to contact me anytime. I'd like to discuss your project with you in more detail. Thanks, Yair Castro less -
Hire DrSyafiq
Greetings! I am a Techpreneur that have more than 9 years expertise working in varied applications of Internet of Things (IoT) which includes UI/UX Design, Web/Mobile App Development, Automation, API Integration, Embedded System, Business Intelligence, Smart Buildings, Supply Chain Management, Tracking/Monitoring...Greetings! I am a Techpreneur that have more than 9 years expertise working in varied applications of Internet of Things (IoT) which includes UI/UX Design, Web/Mobile App Development, Automation, API Integration, Embedded System, Business Intelligence, Smart Buildings, Supply Chain Management, Tracking/Monitoring System, VR/AR Applications, Desktop/Mobile Game Simulators, Green Solutions, FinTech, Drone Software and many more. I have work across all industries with small, medium and large businesses. My skills include but are not limited to: Programming Language: • PHP (Laravel, Codeigniter, Yii, Cakephp) • HTML • CSS • ASP.Net • C++ • C# • Visual Basic • Javascript (Node.js, Vue.js, Vanilla.js, Electron.js, Express.js, Angular.js, React.js, Next.js) • Flask • Django • Python • CMS Framework: • Odoo (ERP) • Wordpress/Woocommerce • Joomla • Drupal • Magnento • Pretashop • Shopify • Moodle • Koha Library • Mobile Framework: • Native iOS (Swift) • Native Android (Java/Kotlin) • Flutter • Ionic • Phonegap • React Native • Xamarin • WebRTC • Jitsi-Meet • Zoom API • BigBlueButton • Agora • Game Development / Augmented Reality (AR) / Virtual Reality (VR): • Unity3D • Unreal Engine • ARKit • ARCore • ARFoundation • Vuforia • Hologram • Three.js • HTML5 • Blender • Engineering / Geolocation Software: • Autodesk (CAD, Revit, Maya, 3ds Max, Forge API, Dynamo) • QGIS • SGlobe • Flightradar24 • SCADA • HMI • PLC • UI / UX Prototype: • Figma • Balsamiq Mockup • Adobe XD • Computing Software: • MatLab • Wolfram Mathematica • Origin Pro • Excel • Tableau • R-Programming • LabView • OpenCV • TensorFlow • Database: • MySQL • MSSQL • MongoDB • SQLLite • PostgreSQL • Google Firebase • Server: • Linux • Windows • MacOS • Cpanel • Cloud AWS (EC2, Lightsail, S3) • Management Tools: • Microsoft Projects • Bitbucket • Gitlab • Hardware: • Drone/UAV • Smartwatch • Sensor • Arduino • High Power Laser • GPS • CCTV • ADSB Radar • Classic Bluetooth/Bluetooth Low Energy (BLE) • I have successfully received a PhD in Physics, Major in Artificial Intelligence and I am actively involved in engineering and scientific research. If you are interested with any of my services, please do not hesitate to contact me. I will Guarantee you will have a Friendly Experience. Let's Digitize your Dreams..!! Warmest regards, Dr. Syafiq Affandi less -
Hire C0RETECHIES
Core Techies is a software development and AI engineering company helping startups and enterprises build scalable digital products, automation systems, AI-powered solutions, and SaaS platforms. Since 2013, we have successfully delivered 200+ projects across web applications, mobile apps, backend systems, enterprise...Core Techies is a software development and AI engineering company helping startups and enterprises build scalable digital products, automation systems, AI-powered solutions, and SaaS platforms. Since 2013, we have successfully delivered 200+ projects across web applications, mobile apps, backend systems, enterprise software, workflow automation, and AI-powered products. Our expertise includes: 🚀 AI Agents & AI Applications Custom AI agents, conversational AI systems, RAG applications, LLM integrations, document intelligence, and business process automation. ⚡ Workflow Automation n8n, Make.com, Zapier, CRM automation, sales workflows, operational automation, lead management, customer support automation, and system integrations. 📱 Mobile App Development Flutter, Android, iOS, React Native, Firebase-powered applications, MVP development, and enterprise mobile solutions. 💻 Web & SaaS Development React, Next.js, Node.js, Python, Java, Spring Boot, custom SaaS platforms, admin dashboards, multi-tenant systems, and enterprise applications. 🔌 API & System Integrations CRM, ERP, payment gateways, third-party APIs, cloud services, communication platforms, and business system integrations. ☁️ Cloud & DevOps AWS, Google Cloud, Docker, Kubernetes, CI/CD, deployment automation, and scalable cloud infrastructure. Our team focuses on building practical solutions that improve operations, automate workflows, reduce manual effort, and help businesses scale efficiently. Whether you need an AI-powered product, SaaS platform, mobile application, automation workflow, or enterprise software solution, we can help transform your idea into a production-ready system. less -
Hire markupdudes
I help businesses turn ideas into powerful, AI-driven applications that boost efficiency, engage users, and scale with ease. I’m a full-stack developer with strong expertise in Artificial Intelligence (AI), Machine Learning (ML), and Large Language Models (LLMs). I build smart, data-driven applications that integrate...I help businesses turn ideas into powerful, AI-driven applications that boost efficiency, engage users, and scale with ease. I’m a full-stack developer with strong expertise in Artificial Intelligence (AI), Machine Learning (ML), and Large Language Models (LLMs). I build smart, data-driven applications that integrate intelligent automation, natural language processing (NLP), and predictive analytics to deliver innovative, scalable solutions for businesses. On the backend, I work extensively with Python (Django, Flask, FastAPI), Node.js, and PHP frameworks including Laravel, CodeIgniter, Joomla, and Magento. On the frontend, I develop modern, high-performance web and mobile applications using ReactJS, React Native, Swift/SwiftUI for iOS, and Kotlin/Jetpack Compose for Android. I also specialize in custom WordPress development, from theme and plugin creation to full-scale, tailored CMS solutions, ensuring functionality matches your exact needs. My UI/UX toolkit covers HTML, CSS, JavaScript, jQuery, and Bootstrap, with a focus on clean, user-friendly design. Beyond application development, I have hands-on experience with Blockchain-based applications, Cloud management (AWS, Azure, Google Cloud), and DevOps workflows (CI/CD pipelines, containerization with Docker/Kubernetes, and server automation). My approach is to combine technical expertise with an understanding of business goals, delivering high-quality, scalable, and future-ready solutions that not only meet but exceed client expectations. less -
Hire arilrivenski
Hi, I am Aril and I’m a senior software engineer with 9+ years of experience building web platforms, automation systems, AI tools, and mobile applications for startups and businesses. Over the years, I’ve worked on everything from SaaS platforms and AI-powered workflows to mobile apps, backend systems, and cloud...Hi, I am Aril and I’m a senior software engineer with 9+ years of experience building web platforms, automation systems, AI tools, and mobile applications for startups and businesses. Over the years, I’ve worked on everything from SaaS platforms and AI-powered workflows to mobile apps, backend systems, and cloud infrastructure. I enjoy building products that are clean, scalable, and actually useful for real business problems. Recently, most of my work has been focused on AI automation, workflow systems, and modern full-stack applications using technologies like OpenAI, Node.js, Python, React, Next.js, Flutter, and cloud services. I have successfully developed: - AI-powered SaaS platforms - Business process automation systems - Multi-agent AI workflows - CRM & ERP integrations - WhatsApp & Telegram automation bots - RAG-based AI applications - Mobile apps for Android & iOS - Cloud-native backend infrastructures - Real-time dashboards and APIs My main stack includes: - Frontend: React, Next.js, Vue.js, TypeScript, Tailwind CSS - Backend: Node.js, Express.js, NestJS, Python, FastAPI, Django, Laravel - AI & Automation: OpenAI API, LangChain, AI Agents, RAG Systems, n8n, Zapier - Mobile: Flutter, React Native, Android, iOS - Blockchain: Solidity, Ethereum, Solana, Web3.js - Database & Cloud: PostgreSQL, MongoDB, Redis, Firebase, AWS, Docker, Kubernetes I can help with: - Full-stack web development - AI integrations and automation - SaaS platform development - Mobile app development - API development and integrations - Cloud infrastructure & DevOps - System architecture and scaling - MVP development for startups I communicate clearly, work independently, and focus on delivering stable, high-quality solutions that are ready for real users and business growth. less -
Hire lazarr4
What makes a great product? Is it a stunning design? Lightning-fast performance? I believe there is only one true measure of a product's success: its ability to generate real business results. With that philosophy at the core of my work, I combine innovative thinking, proven technical expertise, and years of...What makes a great product? Is it a stunning design? Lightning-fast performance? I believe there is only one true measure of a product's success: its ability to generate real business results. With that philosophy at the core of my work, I combine innovative thinking, proven technical expertise, and years of hands-on experience to build products that do more than simply look impressive they create measurable value, drive growth, and increase revenue. The technical skills outlined below, together with my creativity and extensive industry experience, provide the foundation for turning ambitious ideas into successful, results-driven products. ✅ Web Design - Responsive Web design - Modern and Clean design - Powerful UI/UX ✅ Shopify App Development - Shopify Theme Development - Custom Shopify Apps (Node.js, React, Laravel) - Shopify API (REST & GraphQL) - App Extensions & Shopify Functions ✅ WordPress Development - WooCommerce E-Store Development - Customize WordPress Theme - WordPress Theme and Plugin Development ✅ Python & Node.js Development - Scalable Marketplace Development with Django and React. - Flexible E-Commerce Platform with Node and Next. - Accurate Financial Prediction Platform Development With AI Let’s collaborate and build something extraordinary together! less -
Hire suchaeha
Python & Java Backend Developer | AI Systems & Web Scraping Expert As a seasoned Backend Developer with a strong focus on Python and Java, I bring extensive experience in developing scalable REST APIs, AI-driven platforms, data pipelines, and web scraping systems. My background includes successful contributions to...Python & Java Backend Developer | AI Systems & Web Scraping Expert As a seasoned Backend Developer with a strong focus on Python and Java, I bring extensive experience in developing scalable REST APIs, AI-driven platforms, data pipelines, and web scraping systems. My background includes successful contributions to leading system integration firms, semiconductor and electronics companies, and online commerce platforms. I specialize in building intelligent systems powered by RAG (Retrieval-Augmented Generation), LLM (Large Language Models), and Machine Learning, along with robust backend architecture development. Key Skills: Languages & Frameworks: Python, Java, Spring Boot, Spring Batch, Flask, Django, Node.js AI & ML: RAG, LangChain, Document Intelligence, Deep Learning, Pandas, NumPy Web Crawling & Scraping: Selenium, BeautifulSoup, Playwright, WebDriver Databases: Oracle, MySQL, MariaDB, SQLite3, MongoDB, BigQuery DevOps & Tools: Git, Docker, Linux Shell, AWS, Informatica, GCP Frontend: HTML, CSS, JavaScript, JQuery, JSP, Ajax Others: REST API development, ETL pipeline, Document Management Systems, Automated Testing Project Highlights: AI Recommendation System for SI Firm Developed an AI recommendation system using RAG, Vector DB, and LLM Search. Built web crawling and data extraction pipelines storing structured information in Vector DBs, and exposed all features via RESTful APIs. Web Crawling & Real-time Data Monitoring Created backend servers that scrape and compare data across multiple platforms in real-time. Technologies included Selenium, Flask, Django, and JS-based visualization for data trends. Machine Learning Pipeline for Electronics Company Maintained and enhanced Python-based ML and ETL pipelines for demand forecasting using Pandas, BigQuery, and Informatica. Involved in feature engineering, modeling, and report automation. Resource Allocation Platform for Semiconductor Firm Designed and implemented APIs for allocating system resources (CPU, GPU, Memory) and managing development environments. Built full test automation with Python and Flask-RESTful. Shopping Mall Backend Development Built and deployed a scalable RestAPI backend for an e-commerce platform hosted on AWS. Supported admin functionality, API-server integration, and multi-environment setup. Banking Projects (Java/Spring) Participated in core banking rebuilds, batch program development, EDMS systems, and auto-transfer platforms. Migrated legacy C applications to modern Java/Spring Boot systems. Document Management System (EDMS) Fullstack development of EDMS for banking clients, managing all document operations including registration, storage, search, and analytics with Java, JSP, and MySQL. I am currently available for freelance opportunities in Python/Java backend development, AI integration, web scraping systems, and data processing pipelines. Let’s build intelligent and scalable systems together. less -
Hire taraskkorol
I build modern web applications and AI-powered SaaS products from idea to production. My focus is creating reliable, scalable systems that are easy to maintain and ready for real users. I work across frontend, backend, APIs, and AI integrations, helping startups and businesses turn concepts into working products...I build modern web applications and AI-powered SaaS products from idea to production. My focus is creating reliable, scalable systems that are easy to maintain and ready for real users. I work across frontend, backend, APIs, and AI integrations, helping startups and businesses turn concepts into working products quickly and cleanly. What I can help with: • Full-stack web development • AI features and automation • SaaS architecture and MVP builds • API integrations and performance optimization - Mobile App development with AI Integration I value clear communication, realistic timelines, and delivering solutions that actually solve business problems. less -
Hire toqeer74
I am a full-stack developer and IT Consultant helping startups, businesses, and growing brands build custom websites, web applications, APIs, dashboards, and scalable digital solutions. I focus on delivering secure, high-performing, and business-focused systems that solve real problems and support long-term growth. ...I am a full-stack developer and IT Consultant helping startups, businesses, and growing brands build custom websites, web applications, APIs, dashboards, and scalable digital solutions. I focus on delivering secure, high-performing, and business-focused systems that solve real problems and support long-term growth. Core Expertise - Custom Websites and Web Applications - Frontend Development with React and Next.js - Backend Development with Node.js, Python, PHP, and Laravel - API Development and Third-Party Integrations - Dashboards, Portals, and Admin Panels - Database Management with MySQL and MongoDB - SEO, GEO, and AEO optimization - AI Automation, AI Chatbots, and AI Agents - Technical Planning and Consultation I also work with Digital Web Crew, a professional development and growth agency that supports clients with practical, reliable, and results-driven digital solutions. This allows me to combine personal technical expertise with a strong team-based approach whenever a project requires broader support. What You Can Expect - Clear and professional communication - Clean, secure, and scalable development - On-time delivery - Strong attention to detail - Long-term support and reliable project handling My goal is simple: to understand your requirements clearly, deliver quality work on time, and build solutions that create real business value. Invite us for a demo, proof of concept, or pilot project. Regards, Toqeer less
