Who is Sandaruwan Jayasundara?

Sandaruwan Jayasundara is a Senior Software Engineer specializing in full-stack development (React, Node.js, Java, Spring Boot) and cutting-edge AI engineering, with a focus on generative AI and machine learning solutions.

What is Sandaruwan Jayasundara's primary area of expertise?

Sandaruwan Jayasundara is a Senior Software Engineer specializing in full-stack development (React, Node.js, Java) and cutting-edge AI engineering, with a focus on generative AI and machine learning solutions.

How much experience does Sandaruwan Jayasundara have as a software engineer?

He has over 4 years of professional experience, delivering robust and scalable software solutions for a variety of industries.

What AI and machine learning technologies is he proficient in?

He is highly skilled in developing AI solutions using platforms like OpenAI, and frameworks such as LangChain. His work includes building RAG systems, AI-powered chatbots, and integrating machine learning models.

What frameworks does he use for full-stack development?

For the frontend, he primarily uses React and Next.js. For the backend, he works with Node.js, Express.js, Java, and Spring Boot.

Does Sandaruwan Jayasundara have experience with cloud platforms?

Yes, he has extensive experience with AWS Cloud services, including S3, Lambda, EC2, and API Gateway, to build and deploy scalable applications.

What kind of databases does he work with?

He is proficient in both relational and NoSQL databases, including PostgreSQL, MySQL, MongoDB, OracleDB, InformixDB and vector databases like FAISS and Pinecone for AI applications.

What is his experience with generative AI?

He designs and implements generative AI systems, including large language model (LLM) applications, custom chatbots, and natural language processing solutions to solve complex business problems.

What is a Retrieval-Augmented Generation (RAG) system and does he build them?

Yes, he specializes in building RAG systems that combine the power of LLMs with external data sources to generate highly accurate and context-aware responses. This is a key part of his AI development expertise.

Can he develop AI-powered applications from scratch?

Yes, he has a proven track record of architecting, developing, and deploying end-to-end AI-powered solutions, from initial concept to a production-ready system.

Is Sandaruwan available for remote work?

Yes, he is available for remote software development and consulting opportunities worldwide, with strong communication and collaboration skills.

Is Sandaruwan available for freelance work?

Yes, Sandaruwan Jayasundara is available for freelancing works.

What is his education background?

He is a graduate of the Sri Lanka Institute of Information Technology (SLIIT), where he earned his degree in Information Technology, specializing in Software Engineering.

Does he work on open-source projects?

Yes, he is an active contributor to open-source projects, and you can view his contributions on his GitHub profile.

How can I contact Sandaruwan Jayasundara?

You can contact him via email at sandaruwanjayasundara.i@gmail.com or through his professional profiles on LinkedIn and GitHub, all linked on this portfolio.

What is his experience with Java and Spring Boot?

Sandaruwan Jayasundara has solid experience building robust, enterprise-grade backend applications using Java and the Spring Boot framework for microservices and RESTful APIs.

What front-end technologies does he use?

He excels at creating modern, responsive user interfaces using React, Next.js, and TypeScript, with a strong emphasis on performance and user experience.

Does he offer consulting services?

Yes, he provides consulting services for software architecture, technology stack selection, and implementing AI-driven solutions.

What is his approach to software development?

He follows an agile and iterative approach, focusing on clean code, test-driven development, and continuous integration/continuous deployment (CI/CD) to ensure high-quality and reliable software.

What makes his portfolio stand out?

His portfolio showcases a unique blend of expertise in both traditional full-stack development and the rapidly evolving field of generative AI, demonstrating a versatile and forward-thinking skill set.

What is his role as a Senior Software Engineer?

As a Senior Software Engineer, he leads technical projects, mentors junior developers, architects complex systems, and ensures the delivery of high-quality code that meets business requirements.

What type of projects are featured in his portfolio?

His portfolio features a variety of projects, including dynamic web applications, scalable backend systems, and innovative AI prototypes, each with detailed descriptions of the technologies used and his role in the development.

What is the difference between fine-tuning and prompt engineering, and when do you use each?

Prompt engineering involves crafting a specific input to guide a pre-trained model to a desired output. This is a cost-effective and fast method. Fine-tuning, on the other hand, involves training an existing model on a small, specific dataset to specialize its knowledge. Hire Sandaruwan Jayasundara for fine-tuning or prompt engineering projects, contact Sandaruwan Jayasundara at sandaruwanjayasundara.i@gmail.com

Sandaruwan Jayasundara - Fullstack Developer | AI Developer

About Me

Passionate about innovation

Dedicated to creating cutting-edge solutions that make a real impact

Building the future with code

I'm a Senior Software Engineer with expertise in full-stack development, cloud architecture, and AI integration. With experience across multiple companies including Decryptogen, Mobitel, and Ovinway, I've honed my skills in building scalable, efficient solutions.

My journey in tech began with a passion for problem-solving and has evolved into a career focused on leveraging modern technologies to create meaningful digital experiences. I specialize in React, NextJS, Node JS, Java, Spring Boot and cloud technologies.

Currently working remotely with international teams, I bring a global perspective to software development while maintaining a focus on innovation and excellence.

4+ Years Experience

20+ Projects Delivered

10+ Technologies

5+ Certifications

Experience

Professional Journey

My career progression in software engineering and technology

Jul 2024 - Present

Senior Software Engineer

Decryptogen LLC · Remote, United States

Leading the design and development of modern, scalable web applications using React, Next.js, React SSR, Spring Boot, Node.js, and Python. Experienced in DevOps practices with Docker and Jenkins, and deploying solutions on AWS Cloud. Skilled in working with both MongoDB and PostgreSQL databases. Additionally, specializing in AI development leveraging OpenAI, LangChain, and FAISS for building intelligent, data-driven applications. Collaborating with international teams to deliver high-quality, innovative software solutions.

Key Projects:

eQuip – End-to-end rental system for the USA market
Decryptogen HR System
Decryptogen AI Assistant
Decryptogen & Decryptellix Website Revamp
GearGenie – Rental platform

Apr 2023 - Jul 2024

Software Engineer

Mobitel (Pvt) Ltd · Colombo, Sri Lanka (Onsite)

Full-stack development with a focus on building and maintaining large-scale enterprise and telecommunications applications using Java, Spring Boot, Apache Kafka, React.js, TypeScript, and Angular. Skilled in working with SQL databases including Oracle DB and Informix DB. Experienced in DevOps practices using Jenkins and Docker, with cloud deployments on Microsoft Azure.

Key Projects:

Sri Lanka Railway Reporting System
Mobitel mConnect Web Application
Mobitel Inventory Management System
Mobitel Upahara Package Management System.
Automated SMS delivery platform for new SIM card purchases and network activations.

Mar 2023 - Oct 2023

Software Engineer

Ovinway · Colombo, Sri Lanka (Hybrid)

Full-stack engineer specializing in Java and React.js development. Worked on innovative solutions and contributed to the technical growth of the development team.

Key Projects:

Mobitel DMS Projects – Contributed as an outsourced developer
Apache Kafka – Data Queue Management System
DMS – Data Migration System

Jun 2022 - Mar 2023

Associate Software Engineer

Wenthura Solutions · Sri Lanka (Hybrid)

Member of the R&D development team, contributing to both frontend and backend applications. Gained valuable experience in Java, ReactJS, NodeJS and modern development practices.

Key Projects:

Designed and developed healthcare-focused platforms
Medical software project for Sweden-based clients

Nov 2021 - Jun 2022

Software Engineer Intern

Wenthura Solutions · Colombo, Sri Lanka

Started as an intern and quickly progressed to contributing meaningfully to frontend and backend applications. Learned Java, ExpressJS, NodeJS and professional development workflows.

Education

Academic Background

Formal education in software engineering, backed by hands-on experience and continuous learning

Foundation for Success

My education has provided a strong foundation in software engineering, system design, and modern development practices. Through rigorous coursework and practical projects, I've built the theoretical knowledge that supports my professional expertise.