I will build a custom nextjs and spring boot saas web application


About this gig
Stand out with a secure, high-performance web platform.
Need a robust web app, a scalable SaaS, or a premium portfolio? You need custom architecture, not a generic template.
I am a Full-Stack Developer specializing in Next.js, React, Astro, Spring Boot, Node.js, and FastAPI. With a security-first engineering approach, I build platforms that are lightning-fast, highly scalable, and fundamentally secure. Because I build from scratch, I prioritize clean code and thorough architecture over rushed deployments.
What I Build:
- Custom Web Apps & SaaS: Data-driven platforms, secure user auth, and dashboards.
- Agency Portfolios: Pixel-perfect, high-converting single-page applications.
- Complex Marketplaces: Platforms with real-time features and dynamic listings.
My Tech Stack:
- Frontend: Next.js, React, Astro, Vue.js, Tailwind CSS
- Backend: Spring Boot, Node.js, FastAPI
- Database & DevOps: SQL, REST APIs, secure server deployment
Why Work With Me?
- Security-first development (API hardening).
- Clean, maintainable, and documented code.
- Blazing-fast performance and responsive UI.
Please send me a message before placing an order so we can discuss your exact requirements!
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Get to know G.ELLADENIYA
Full Stack Developer, Custom Web Apps and SaaS Solutions
- FromSri Lanka
- Member sinceApr 2020
- Avg. response time1 hour
Languages
English
My Portfolio
FAQ
Do you provide support after the project is completed?
Absolutely. I provide 14 days of complimentary support for all packages to ensure everything runs smoothly. For long-term maintenance or updates, I offer affordable monthly maintenance packages to keep your platform secure and up-to-date.
What is your process for full-stack projects?
I follow a professional SDLC approach: 1. Discovery & Requirements Gathering, 2. UI/UX Wireframing, 3. Agile Development, 4. Rigorous Testing (Bug/Security), and 5. Deployment. You will receive progress updates throughout every phase.
Can you work with my existing codebase?
Yes. Whether it’s a React/Next.js migration, a Spring Boot backend, or a legacy system overhaul, I am happy to audit and improve your existing code. Please message me with your repository details so I can provide a custom quote.
Are you able to integrate third-party APIs?
Yes, I specialize in seamless API integrations, including Stripe for payments, Auth0/Firebase for secure authentication, SendGrid for emails, and various RESTful or GraphQL APIs to extend your application’s functionality.
Why should I choose your services over others?
Unlike generalist freelancers, I combine modern architectural best practices with a focus on business logic. My goal isn’t just to build a site; it’s to build a high-performance asset that drives conversions and supports your business growth.
Do you only work with Next.js and Spring Boot?
While Next.js and Spring Boot are my core premium stack, I am a versatile Full-Stack Engineer. I will analyze your specific business requirements and recommend the most efficient, scalable, and cost-effective framework (such as React, Vue, Node.js, Astro, etc.) before we start coding.

