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$
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I will engineer a custom full stack saas web apps using node js
Sehan D
About this gig
Need more than a basic website? I build custom web softwares designed for real business needs.
Whether you're launching a SaaS product, building an internal dashboard or replacing a legacy system, I create secure, scalable software with clean architecture and maintainable code.
What I can build:
- Custom SaaS platforms
- Enterprise dashboards, CRMs & internal tools
- REST & gRPC APIs
- Scalable backend architecture
- Database design & optimization
- Dockerized deployments
- React/Next.js frontend with Node.js, FastAPI, Spring Boot or Go backend
Tech Stack: React, Next.js, Node.js, FastAPI, Spring Boot, Go, PostgreSQL, MySQL, MongoDB, Redis, Docker.
I focus on performance, security, and long term maintainability. Not templates or low code solutions. Every project is built from the ground up to match your business requirements.
Send me a message before ordering so we can discuss your goals, technical requirements and the best approach for your project.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Sehan D
Sehan D
Software Engineer
- FromSri Lanka
- Member sinceMay 2026
- Avg. response time3 hours
Languages
Sinhala, English, German
Hello there! I’m a Software Engineer with 4+ years of experience building clean, scalable web apps and SaaS products. I have worked with many clients and completed 50+ projects using React, Next.js, Node.js, Go, Python, Google Maps API, authentication systems and API integrations. I focus on clean code, clear communication, fast delivery and reliable results. Let’s discuss your project and build it the right way.
My Portfolio
FAQ
Do you build standard WordPress, Wix, or Shopify websites?
No. I am a Software Engineer focused entirely on custom web applications, SaaS platforms, and complex backend systems. I write custom code (React, Next.js, Node.js, Python, Java) and do not use drag-and-drop website builders.
Why is it mandatory to message you before placing an order?
Software architecture is highly complex. Discussing your business logic, database requirements, and scaling needs beforehand ensures we choose the exact right tech stack (e.g., deciding between Python FastAPI or Java Spring Boot) and prevents any misunderstandings regarding the project scope.
What is the difference between a "website" and what you build?
A traditional website primarily displays static content or basic ecommerce. I build functional web software. This includes platforms with multi-tenant user authentication, complex API integrations, background task queues, and secure database transactions.
How do you handle database design and performance?
A fragile database will ruin a beautiful frontend. I design highly normalized, optimized schemas tailored to your specific data flow. Depending on your system's requirements, I utilize relational databases (PostgreSQL/MySQL), NoSQL databases (MongoDB), and caching layers (Redis).
Will you help deploy the software once it is built?
Absolutely. I ensure your application is production-ready. I provide Dockerized setups, ensuring your backend and frontend are properly containerized and ready to be deployed reliably on modern cloud infrastructure like AWS, Google Cloud, or DigitalOcean.
