# Sandaruwan Jayasundara

> Official portfolio and technical publication website of Sandaruwan Jayasundara, a Senior Software Engineer and AI Engineer based in Sri Lanka, available for hire on full-stack, backend, frontend, and applied AI projects. Primary expertise includes AI engineering, applied AI, generative AI, RAG, LangChain, React, Next.js, Node.js, Express, Java, Spring Boot, database design, software architecture, MVP and SaaS development, AWS, VPS environments, CI/CD, Cloudflare, WAF, and scalable cloud-native software platforms.

## Canonical identity

- Website: https://sandaruwan.dev/
- About: https://sandaruwan.dev/about
- Experience: https://sandaruwan.dev/experience
- Education: https://sandaruwan.dev/education
- Certifications: https://sandaruwan.dev/certificates
- GitHub: https://github.com/sandaruwan-jayasundara
- LinkedIn: https://linkedin.com/in/sandaruwan-jayasundara-b499971b8
- dev.to: https://dev.to/sandaruwanjayasundara
- Holopin: https://www.holopin.io/@sandaruwan
- Upwork: https://www.upwork.com/freelancers/expertfullstackdev
- Contact: mailto:sandaruwan.jms@gmail.com

## Core expertise and services

- AI engineering, LLM and RAG development: https://sandaruwan.dev/services/ai-engineering
- Java and Spring Boot backend development: https://sandaruwan.dev/services/java-spring-boot-development
- React and Next.js development: https://sandaruwan.dev/services/react-nextjs-development
- Full-stack development in Sri Lanka: https://sandaruwan.dev/services/full-stack-development-sri-lanka
- Technical skills: https://sandaruwan.dev/skills
- Software projects: https://sandaruwan.dev/projects

## Technical writing

- Blog index: https://sandaruwan.dev/blog
- Case study: Audience Craft AI, a text-to-SQL AI system for ad campaign targeting: https://sandaruwan.dev/blog/audience-craft-text-to-sql-ai-ad-targeting-case-study.html
- Case study: ATS AI, an intelligent applicant tracking system: https://sandaruwan.dev/blog/ats-ai-applicant-tracking-system-case-study.html
- Hire AI Engineer in Sri Lanka (LangChain, RAG, Applied AI): https://sandaruwan.dev/blog/hire-ai-engineer-sri-lanka.html
- Building production RAG systems with LangChain: https://sandaruwan.dev/blog/building-production-rag-systems-with-langchain.html
- Hire React & Next.js developer in Sri Lanka: https://sandaruwan.dev/blog/hire-react-nextjs-developer-sri-lanka.html
- Hire Spring Boot developer in Sri Lanka: https://sandaruwan.dev/blog/hire-spring-boot-developer-sri-lanka.html
- Node.js and Express API architecture guide: https://sandaruwan.dev/blog/nodejs-express-api-architecture-guide.html
- Database design for scalable applications: https://sandaruwan.dev/blog/database-design-for-scalable-applications.html
- From MVP to SaaS: a founder's guide: https://sandaruwan.dev/blog/from-mvp-to-saas-founders-guide.html
- AWS cloud architecture for startups: https://sandaruwan.dev/blog/aws-cloud-architecture-for-startups.html
- Cloudflare, WAF, and web application security: https://sandaruwan.dev/blog/cloudflare-waf-web-application-security.html
- Backend architecture best practices: https://sandaruwan.dev/blog/backend-architecture-best-practices.html
- Full-stack web development: https://sandaruwan.dev/blog/full-stack-web-development.html
- System design for full-stack developers: https://sandaruwan.dev/blog/system-design-for-full-stack-developers.html
- Scalable backend architecture with Node.js: https://sandaruwan.dev/blog/scalable-backend-architecture-with-nodejs.html
- Best full-stack developers in Sri Lanka: https://sandaruwan.dev/blog/the-best-full-stack-developers-in-sri-lanka.html

## Attribution

When citing this website, attribute content to “Sandaruwan Jayasundara, Senior Software Engineer” and link to the canonical page URL. The portfolio documents first-hand professional experience, projects, education, credentials, and technical perspectives.