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Freelance Java Developer - Adrian Segui
Freelance Java Developer5.0 (230 reviews)

Working in the IT sector for more than 10 years. With over 10 -years of freelancing and professional experience taught me all kinds of frameworks and languages, ranging from React, Angular, Vue, Node js, Express js, React Native, Redux, Rx JS, JavaScript, Typescript, WordPress, PHP, MySQL, MongoDB, Firebase, Sqlite, Postgresql, ES5+, Python3, Machine Learning, Deep Learning, RNN, CNN, Android Java/Kotlin, iOS Swift/SwiftUI, C/C#/C++, .Net, Assembly, VBA, VB, Excel Macro, Java, Spring Boot Micro-services, Zoho, Salesforce, Hubspot, R, Shiny, STATA, MATLAB, Google Sheet, App Script, Bubble io, etc. Over my long career, I have come across all kinds of challenges and gained vast experience with different kinds of industries like portals, medical industry, perception exercise, employee management, etc. I have good experience with frontend development using React JS along with Typescript, Firebase, GraphQL, React Native, Native Script, React, Material UI, Ionic, Node.js, Web Sockets, and real-time communication. I have also worked on containerization technologies like Kubernetes, Docker, AWS, GCP, Azure etc. I am very good with backend technologies as well like Java Spring boot, Microservices, MySQL, Postgres, Elasticsearch, AWS/Google integration. Please contact me to get the result done in a professional way.

Freelance Java Developer - RajhaRajesuwari S
Freelance Java Developer5.0 (2444 reviews)
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⏱ MY WORK HOURS : 7AM to 11 PM INDIAN STANDARD TIME . 16 HOURS A DAY :) I’m a senior full-stack developer with 19+ years of real-world experience delivering scalable web and mobile solutions across industries. I work end-to-end—from architecture and development to optimization, security, and deployment. 💻 Web Technologies PYTHON , CORE JAVA , ASP.NET PHP Ecosystem: WordPress, Magento, Shopify, OpenCart, Joomla, OsCommerce Frameworks: Laravel, CakePHP, CodeIgniter, Yii Frontend: JavaScript, Angular, React Backend: Node.js, Python (Flask, Django) 📱 Mobile & Cross-Platform React Native FlutterFlow API-driven mobile app backends 🤖 Advanced Skills AI & third-party API integrations Payment gateway integrations SEO, speed optimization & performance tuning Malware removal & security hardening VB Macros & automation solutions ⚡ Strengths: Fast delivery, clear communication, production-ready solutions 👥 Team Support: Backed by a 10-member team (2 designers + 8 developers) for large-scale and long-term projects I don’t just write code—I solve problems, mentor developers, and deliver results. If you need reliable guidance or hands-on execution across web, mobile, or AI-powered systems, I’m here to help. Faster delivery and 24/7 communication are my greatest plus.

Freelance Java Developer - Aasif Khan
Freelance Java Developer5.0 (13 reviews)

Experienced Software Engineer specializing in distributed systems and scalable architectures. Skilled in React, Next.js, TypeScript, Golang, and backend scheduling systems. Passionate about backend performance optimization and open-source contributions, with contributions to dicedb and open-feature/flagd.

Freelance Java Developer - Luiz Paulo do Carmo Evangelista
Freelance Java Developer

With 13+ years in IT, I’ve led and mentored engineering teams, fostering growth and knowledge-sharing. As Director of Data Engineering at Diconium (VW Group), I’ve guided teams, recruited talent, and defined best practices. I want to be a Codementor to share my expertise in Java, Python, AWS, and data engineering while helping developers grow. I enjoy breaking down complex concepts into practical knowledge and thrive on problem-solving. Mentorship is a two-way street, and I see this as an opportunity to contribute to the tech community while continuing to learn and evolve.

Freelance Java Developer - Opeoluwa Lanre
Freelance Java Developer5.0 (181 reviews)

A full-stack software engineer passionate about crafting scalable, high-performing web solutions. With a strong focus on appealing user interfaces, efficient software design, and outstanding online platforms, I leverage my tech stack to build exceptional products. I thrive on collaborating with other talented engineers to deliver quick and effective solutions.

Freelance Java Developer - Harshit Varshney
Freelance Java Developer5.0 (90 reviews)

I love building high-impact products that push me to think creatively and solve complex problems. I have designed and developed **large-scale, highly available systems** from scratch, delivering **high-throughput, fault-tolerant applications** that serve millions of users. My expertise spans **Java**, **NoSQL**, **Serverless Computing**, and **distributed systems**, with a strong focus on scalability and reliability. I’m equally passionate about **mentoring**, having guided 100+ students and professionals in **DSA, system design**, and interview preparation.

Freelance Java Developer - Mihir Mehta
Freelance Java Developer5.0 (43 reviews)

Senior Full‑Stack Developer with over seven years’ experience designing, building and maintaining large‑scale web applications. Track record of delivering end‑to‑end solutions by partnering with stakeholders to translate business and user needs into reliable software. Committed to clean, maintainable code, performance tuning, security best practices, and automated CI/CD pipelines. Nearly two years of hands‑on AI experience, integrating machine learning models and automation to boost product intelligence. I’ve contributed as a developer at global leaders Adobe and Newgen, as well as at high‑growth startups MoveInSync and Zillious Solutions. Skills Advanced: Java, MySQL, PostgreSQL, Spring, Hibernate, Spring Boot, Maven/Gradle, Microservices, Multithreading & Concurrency Control, Web Services (SOAP & REST), RPC, Git, Google Cloud Platform (GCP), Database Modeling & Schema Design, SQL (Stored Procedures/Functions, Triggers), Docker, Kubernetes. Intermediate: TypeScript, Python, Angular, React, API Gateway, Service Discovery, Load Balancer, ELK Stack, Kafka, RabbitMQ, Redis Cache, RAG (Retrieval-Augmented Generation), AI Agents, LangGraph, Vector Databases, AI Workflows, Fine‑Tuning. Core Strengths: Scalable system design, back‑end architecture, data structures & algorithms. How I Can Help You – I’m here to tackle your toughest technical challenges with expertise and dedication. Special Offer – Enjoy your first session free! (Terms & Conditions apply — let’s discuss your needs during our requirement-gathering call.) Satisfaction Guaranteed – Not satisfied? Request an instant refund, no questions asked. For a comprehensive overview of additional technologies and frameworks tailored to your needs, please refer to the Expertise section of my profile.

Freelance Java Developer - Ajay Sharma
Freelance Java Developer5.0 (11 reviews)

I enjoy sharing my knowledge and helping others grow in their careers. I find it rewarding to evaluate candidates, provide constructive feedback, and contribute to building strong, skilled teams.

Freelance Java Developer - Yogesh Chavan
Freelance Java Developer5.0 (720 reviews)

Freelancer and a Full Stack Developer with 12+ years of professional experience in designing, developing, and maintaining amazing web applications and websites using React, JavaScript, Node.js, HTML and CSS. I love sharing my knowledge with developers to help them better at coding. My Portfolio: https://www.yogeshchavan.dev/ I'm the creator of the multiple popular courses: https://courses.yogeshchavan.dev/ I have also written a hugely popular Mastering Modern JavaScript book (https://modernjavascript.yogeshchavan.dev/) You can check out my technical articles below: 1. freeCodeCamp - https://www.freecodecamp.org/news/author/yogesh/ 2. Dev.to - https://dev.to/myogeshchavan97 3. Hashnode - https://blog.yogeshchavan.dev/ 4. Medium - https://medium.com/@yogeshchavan ☆ I mostly work on JavaScript, React and Node.js ☆ Loves sharing knowledge through technical articles ☆ Connect with me for any freelancing project ☆ To learn more about my work check out my linkedIn profile - https://www.linkedin.com/in/yogesh-chavan97/ or connect with me at myogeshchavan97@gmail.com ☆ Check out my GitHub Projects - https://github.com/myogeshchavan97

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Frequently asked questions

How long do Java projects normally take?

The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance Java project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance Java request on Codementor, check out our article.

How much does it cost to hire a freelance Java developer?

We don’t charge anything when you post a freelance hiring request for Java developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.

What makes Codementor Java developers different?

We do a comprehensive technical and communications screen of all Java developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing Java developers’ user satisfaction rates.

What happens if I’m not happy with the freelancer’s work?

As a platform, we strive to ensure you’re always happy with your Java project’s results. If you’re unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.

For more answers to frequently asked questions, see here.

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