Full Stack React Redux Java Spring Boot Developer Needed

Budget: 4500 USD Deadline: 30 days

I specialize in scaling React/Redux Toolkit/Saga frontends seamlessly integrated with Spring Boot REST APIs, leveraging AI tools like Cursor and Claude Code to accelerate routine development while keeping architecture rock-solid.

How are you currently handling task cancellation (takeLatest / cancel) in your Redux Saga layer during rapid data fetch triggers inside heavy DevExpress components to prevent memory leaks and state desync with Spring Boot?

Let's discuss timeframe, budget, and project specs in direct messages. 🤝

Budget: 800 USD Deadline: 5 days

Hello Mateusz. Your brief describes an ongoing role rather than a fixed scope, so I suggest starting with one defined milestone for $800. I use Codex to inspect repositories, implement changes in small isolated branches, run tests, lint and type checks, and review every diff before delivery. I can handle React/Redux frontend work and support Spring Boot changes as needed. Please share the application purpose, repository structure, and the first feature or issue you want delivered.

Budget: 800 USD Deadline: 21 days

Hi Mateusz,

The line that stands out in your brief is wanting someone comfortable in an AI-assisted environment while maintaining code quality. Those two pull against each other, and that tension seems worth addressing directly rather than just answering yes.

I work in Claude Code daily, well past autocomplete — orchestrating multiple agents, isolated worktrees so parallel work cannot collide, delegating mechanical work to cheaper models while keeping architecture and review on the strongest one. The productivity side is not theoretical for me.

How quality survives it matters more. Three things I hold to.

The assistant never validates its own work. It writes, I verify by running the thing, not by reading a summary claiming it passed. A tool reporting success is a claim, not evidence.

Diffs stay small and scoped. AI-assisted development fails when generated volume outpaces the review capacity of whoever owns the code. Reviewable increments beat large, correct-looking changes.

Some code gets written by hand regardless. Redux Saga is a good example: generator-based side-effect flow is exactly where assistants produce confident and wrong code, because the control flow is unusual enough that pattern matching misleads them. Same for anything touching auth or money.

On stack, React with Redux Toolkit, TypeScript, and responsive work across desktop, tablet and mobile is daily territory, and Material UI is familiar. Straight about one thing: Java and Spring Boot are not my primary backend. I read and modify them comfortably, and your brief frames backend as supporting work rather than the core, but I would rather say it now than have it surface in week two.

One question, since the brief describes a role rather than a scope. What does the application do, and what is the first concrete piece you want shipped? Happy to work to the 800 USD as a defined first chunk.

Form: 800 USD, 21 days. Expand

Budget: 800 USD Deadline: 14 days

Hello,

I am very interested in your project and would be happy to contribute to the development of your web application.

I am currently studying Full Stack Development and am in the final stage of my education, where I am completing my final project. Throughout my studies, I have gained practical experience working with modern web technologies and continue to actively develop my skills in both frontend and backend development.

Your technology stack aligns well with my learning and development path. I am confident working with React, JavaScript, HTML, CSS, responsive design principles, and modern development workflows. I also have experience collaborating with version control systems and team-based development processes.

I particularly appreciate AI-assisted development workflows and consider Claude to be one of the best modern solutions for software development. When used correctly, it significantly improves productivity while maintaining high code quality and development standards.

I am highly motivated, detail-oriented, and ready to complete the project as quickly as possible while carefully following all requirements and ensuring a reliable, maintainable result.

I would be glad to discuss the project in more detail and review the full technical specification. I look forward to hearing from you and learning more about the tasks and expectations :) Expand

Budget: 800 USD Deadline: 3 days

Good evening!

I work extensively with React and Redux, focusing on scalable UI architecture, clean component structure, and state management.

My main background includes React/Redux ecosystem alongside backend development (primarily Python, but I also have hands-on experience with Java and Spring Boot for API integration and backend tasks).

Regarding AI workflows: I use specialized agentic setups like OpenCode, Zed Agent, and Pi Agent in my daily routine. This lets me iterate fast on complex components and codebases without sacrificing architecture quality.

I can show you code samples or past work in DMs. Let’s connect and discuss the current tasks!

Budget: 800 USD Deadline: 10 days

Hello!

I am Nina from the Valflow IT team. Our Full Stack developer, Valentin, specializes in building modern web applications using React/Redux on the frontend and Java/Spring Boot on the backend.

We regularly use AI-assisted tools like Claude Code in our daily workflow to write clean, maintainable, and thoroughly tested code at high speed.

How we can contribute to your project:

1. Frontend Development (React & Redux):
• Building responsive, accessible, and clean UI components using React, Redux Toolkit, and Redux Saga.
• Integration with Material UI / DevExpress and crafting fluid layouts across desktop, tablet, and mobile.
• Modular architecture, state optimization, and pixel-perfect design translation.

2. Backend Support (Java Spring Boot):
• Supporting RESTful APIs, controller logic, and database layer integration in Spring Boot.
• Code reviews, writing tests, and maintaining scalable project structure.

Our portfolio and work examples:
https://valflow.dev/

Project terms:
• Bid: 800 USD
• Delivery time: 10 days

We are ready to review your current codebase and get started right away! Expand

Budget: 800 USD Deadline: 1 day

Hello! I have strong experience with React, Redux Toolkit, JavaScript, HTML/CSS, and creating responsive interfaces. I have also worked with Java and Spring Boot, so I can handle both frontend tasks and assist with backend. In my daily work, I use AI tools like Cursor and GitHub Copilot to implement functionality faster without compromising code quality. I write clean, maintainable code, easily understand existing projects, and am results-oriented. I would be happy to discuss the details and showcase relevant experience.

Budget: 800 USD Deadline: 2 days

Good evening, I am interested in the vacancy.

My portfolio: https://tokyo-portfolio.vercel.app/

Budget: 800 USD Deadline: 10 days

Your project is not just another React frontend, but a complex system where each component needs to work like clockwork. I see that you need a developer who not only writes code but thinks architecturally. My approach: first, I will analyze your UI/UX design, break it down into modules, set up Redux Toolkit + Saga for predictable state, and ensure that the frontend and backend on Java/Spring Boot communicate seamlessly. I am proficient with Material UI and DevExpress, and for mobile responsiveness, I will use CSS Grid/Flexbox. If needed, I will connect to your AI assistant (Claude, Cursor, Copilot) to speed up routine tasks, but quality control will remain with me. Plan: Day 1 — requirements analysis, project setup, CI; Days 2-4 — frontend core, components, state; Days 5-7 — API integration, responsiveness, tests; Days 8-10 — final polishing, code review, handover. After each stage — a demo. I will not just fulfill the specifications but will ensure that your team can easily maintain the code and expand functionality. Let’s discuss the details — and I will show you how it will work.

Budget: 800 USD Deadline: 10 days

Hello. I have a deep understanding of the requirements for developing a modern client/server web application with a focus on high-quality frontend. My strategy involves building a scalable and fault-tolerant frontend architecture on React with effective state management through Redux Toolkit and Redux Saga, ensuring interface adaptability and component reusability. I also effectively integrate backend support on Java/Spring Boot, using clean code principles, TDD, and modern CI/CD practices to guarantee quality and speed of development, particularly with the use of AI assistants. I have significant experience in creating similar complex solutions and possess a set of ready-made architectural templates and components that will significantly accelerate the start and implementation of the project. I propose to discuss all implementation details, final budget, and timelines in personal messages.