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Open to AI Engineering & GenAI Innovation

Hi, I'm Lasitha Dilshan

> Specialized in: AI Engineer

AI Engineer and Full-Stack Software Engineer with 5 years of experience architecting enterprise Generative AI solutions, Retrieval-Augmented Generation (RAG) systems, agentic AI workflows, and cloud-integrated platforms. Currently delivering cutting-edge GenAI and compliance intelligence platforms at Virtusa.

Explore AI Projects Experience
1st Place Winner
Virtusa Agentic AI '25
Lasitha Dilshan Thilakarathna
Colombo, Sri Lanka
Virtusa · SLIIT MSc Researcher
5 Yrs Exp
5+
Years Experience
1st
Agentic AI Hackathon Winner
12+
Enterprise & AI Projects
4+
GenAI Certifications & Research
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lasitha-agentic-engine v2.6.0 ONLINE
Python · FastAPI · LangChain
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Lasitha Dilshan Thilakarathna is an AI Engineer and Full-Stack Software Engineer with 5 years of experience delivering enterprise web applications, Generative AI solutions, Retrieval-Augmented Generation (RAG) systems, agentic AI workflows, and cloud-integrated software platforms.

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Technical Arsenal

Core Technical Skills

Comprehensive stack honed through 5 years of enterprise client delivery, GenAI hackathons, and postgraduate research.

Generative AI & LLM Engineering

OpenAI Models Google Gemini AWS Bedrock LangChain Agentic RAG Workflows Multi-Agent Systems Hugging Face Semantic Search Embeddings Document Intelligence Prompt Engineering Conversational AI

Backend & API Development

Python FastAPI Flask Java Spring Boot NestJS RESTful APIs Microservices Architecture Streaming SSE APIs File Upload Workflows JSON Schema Extraction Validation Pipelines

Frontend Engineering

Angular (v8 - v18+) React TypeScript JavaScript (ES6+) HTML5 & CSS3 / SCSS Angular Material Material UI Bootstrap Responsive Dashboards Role-Based Interfaces Reusable Components

Databases & Vector Stores

FAISS ChromaDB Pinecone pgvector PostgreSQL MySQL Firebase Cloud Firestore SQLite Persistent Vector Stores

Cloud, DevOps & Workflows

AWS Services Google Cloud (GCP) Docker Git & GitHub GitLab CI/CD Agile Delivery & Scrum Cross-Functional Delivery

Mobile & Application Development

Android Development Java Firebase Authentication Firebase Realtime DB Cloud Firestore Push Notifications Offline Sync
Career Journey

Professional Experience

Track record of building enterprise-grade Generative AI, RAG, and scalable software platforms.

Associate Software Engineer

Virtusa · Colombo, Sri Lanka
2022 - Present
  • Develop enterprise full-stack and Generative AI applications using Angular, React, Python, FastAPI, LangChain, Hugging Face, vector databases, and cloud services.
  • Build AI-powered dashboards, digital asset libraries, document libraries, semantic search interfaces, workflow monitoring modules, and compliance-focused user experiences.
  • Design and maintain FastAPI services for conversational AI, agentic workflows, retrieval pipelines, content analysis, validation workflows, file processing, and real-time streaming data handling.
  • Implement RAG solutions using embedding models, FAISS, ChromaDB, Pinecone, prompt engineering, and persistent storage to generate context-aware responses and accelerate enterprise knowledge discovery.
  • Collaborate with product, QA, architecture, and global client teams to deliver GenAI, compliance review, test automation, and policy analysis solutions in enterprise environments.
Python FastAPI LangChain RAG FAISS ChromaDB Angular React AWS GCP

Intern Engineer

Surreytech Consulting · Sri Lanka
2021 - 2022
  • Supported full-stack development of a comprehensive doctor appointment management system using Angular frontend technologies and Java Spring Boot backend APIs.
  • Implemented reusable UI components, form validations, API integrations, and database-driven features for healthcare scheduling workflows.
  • Collaborated on database schemas, doctor availability logic, patient booking registrations, and transactional notification alerts.
Angular Java Spring Boot TypeScript REST APIs MySQL Bootstrap
Portfolio Showcase

AI & Software Projects

Delivering enterprise AI platforms, agentic solutions, and client systems across Virtusa, hackathons, and research.

Enterprise AI & RAG 2026 - Present

VirtusaX - Enterprise Functions AI

Virtusa Client Project

An enterprise AI platform enabling intelligent automation, knowledge discovery, and business process optimization across multiple organizational functions.

  • Enhanced Angular dashboards, digital asset libraries, AI-powered search, workflow monitoring, and document intelligence capabilities.
  • Built and maintained FastAPI microservices for conversational AI, agentic workflows, semantic retrieval, content analysis, and real-time data processing.
  • Implemented RAG pipelines using embedding models, FAISS vector databases, and prompt engineering to generate accurate, context-aware insights.
Angular Python FastAPI RAG FAISS Embeddings Semantic Search
Compliance AI & OCR 2025 - 2026

Investment AI-MLR Process

Virtusa Client Project

Full-stack AI-powered MLR (Medical, Legal & Regulatory) assistant platform for content review, compliance validation, and knowledge retrieval.

  • Built Angular modules for dashboards, document libraries, video disclaimer analysis, OCR processing, transcript extraction, and progress tracking.
  • Developed FastAPI services for conversational AI, claim/disclaimer management, validation workflows, file uploads, and streaming responses.
  • Leveraged RAG and FAISS vector stores to improve compliance efficiency and accelerate regulatory review workflows.
Angular Python FastAPI RAG OCR FAISS Streaming APIs
🏆 1st Place Winner 2025

Travel Mate Agentic AI Application

Virtusa Agentic AI Hackathon Winner

Autonomous multi-agent travel assistant for dynamic itinerary generation, travel recommendations, and automated planning workflows.

  • Led and coordinated the engineering team to design and deploy an Agentic AI architecture.
  • Integrated Angular frontend experiences with OpenAI LLMs, Google ADK, and multi-agent coordination frameworks.
  • Secured 1st Place in the Virtusa Agentic AI Hackathon for innovation, technical execution, and autonomy.
Agentic AI Multi-Agent Google ADK OpenAI LLMs Angular
GenAI QA & WCAG 2025

PCG QA Test Automation Suite

Virtusa Client Project

AI-powered QA automation suite transforming business requirements and user stories into test cases, acceptance criteria, and automation-ready scripts.

  • Implemented RAG and LLM workflows for requirement analysis, test artifact generation, validation, and reporting.
  • Built AI-driven accessibility testing capabilities aligned with WCAG standards to identify usability and compliance issues across enterprise web applications.
Generative AI RAG LLMs Accessibility (WCAG) QA Automation
Document Intelligence 2025

PCG Policy Document Analyzer

Virtusa Client Project

Conversational policy analysis platform allowing enterprise users to upload large policy documents and query them contextually.

  • Built RAG architecture using Python, FastAPI, LangChain, Gemini LLMs, and Hugging Face embeddings.
  • Added response accuracy analysis, confidence scoring, source citation tracking, and semantic search to drastically reduce manual review time.
Angular Python FastAPI LangChain Gemini LLMs Hugging Face RAG
JSON Schema & LLM 2024

AI-Powered CV Generator

Virtusa Client Project

AI resume transformation platform converting raw candidate CVs into standardized Virtusa-branded templates.

  • Designed RAG and prompt templates to extract, validate, and structure unstructured resume information into predefined JSON schemas.
  • Developed ReactJS mapping logic to populate prebuilt CV templates, ensuring brand consistency and saving hundreds of manual recruitment hours.
React FastAPI LangChain OpenAI LLMs JSON Schema
MSc Research Platform 2024

SDLC Automation Platform

SLIIT MSc Research Project

GenAI-powered SDLC automation platform transforming raw software requirement documents into structured artifacts.

  • Generated user stories, acceptance criteria, test cases, test scenarios, and automation scripts using GenAI workflows.
  • Improved traceability across SDLC phases and accelerated QA preparation through standardized requirement analysis.
Python OpenAI LLMs LangChain Hugging Face RAG Prompt Engineering
GenAI Hackathon 2024

BRD to User Story Generator

Virtusa GenAI Hackathon

GenAI solution converting heavy Business Requirement Documents (BRDs) into structured Agile user stories and criteria.

  • Implemented document extraction, semantic retrieval, and prompt engineering to improve Agile planning efficiency and minimize manual analysis effort.
RAG OpenAI LLMs Hugging Face Embeddings Document Extraction
Compliance Management 2025

PCG CAMS Application

Virtusa Client Project

Frontend development of an enterprise compliance and workflow management application using Angular and .NET backend APIs.

  • Integrated Angular components with .NET backend APIs, implemented robust form validations, data visualization, and role-based UI functionality.
  • Improved usability, performance, and maintainability through reusable component architectures.
Angular TypeScript .NET APIs Data Visualization
Enterprise Self-Service 2023

After Hour Transport & Food System

Virtusa Client Project

Employee self-service solution to manage after-hours food and transportation requests, approvals, tracking, and operational reporting.

Microsoft Power Apps SharePoint React TypeScript
Insurance Portal 2022

Protective OpenText - Print Pro

Virtusa Client Project

Web-based insurance portal delivering responsive interfaces, reactive forms, reusable components, and API integrations for policy processing.

Angular TypeScript Bootstrap SCSS Angular Material
Healthcare Platform 2021 - 2022

Doctor Appointment Management System

Surreytech Consulting Sri Lanka

Healthcare appointment platform streamlining doctor scheduling, patient booking, availability tracking, and notification workflows.

Angular Java Spring Boot REST APIs MySQL
Early Engineering Works 2018 - 2021

Additional Academic & Engineering Projects

Foundation Projects
  • SendGrid Email Spring Boot API (2021): Reusable Spring Boot transactional email service with configurable workflows.
  • Social Network Android App (2020): Android social network with Java, SQLite, Firebase Auth, Realtime DB, and Firestore.
  • Shoe Shop Web Cart (2019): Java web e-commerce app with cart, order processing, and MySQL integration.
  • Phone Shop Sell_Fonic (2018): Java SE desktop retail management application with inventory, billing, and CRUD operations.
Java Spring Boot Android Firebase MySQL SQLite
Academic Contributions

Research & Publications

Advancing human-centered machine learning applications and modern AI integration.

Published Paper · 2024

Optimizing User Experience Through Machine Learning: A Review of Key Tools and Technologies

Authors: Thilakarathna L. et al. · 2024

A comprehensive review examining machine learning techniques in UX design, algorithmic bias mitigation, privacy-preserving AI frameworks, and practical workflow integrations spanning PyTorch, TensorFlow, and Figma interface telemetry.

Machine Learning in UX Bias Mitigation Privacy in AI PyTorch TensorFlow Figma Integration
Accolades & Credentials

Awards & Certifications

Recognized for hackathon performance, technical excellence, and specialized GenAI expertise.

1st Place - Virtusa Agentic AI Hackathon

Virtusa Global Competition
2025 · Travel Mate Autonomous Agent

Career Essentials in Generative AI

Microsoft and LinkedIn
2023 · Credential Verified

Certified Generative AI Assisted Engineer

Virtusa Corporation
2024 · Enterprise Certification

Custom Generative AI Pathway

Virtusa Corporation
2024 · Specialized Curriculum

Generative AI Hackathon Certificate

Virtusa Corporation
2024 · BRD to User Story Generator

Arctic Code Vault Contributor

GitHub Archive Program
2020 · Preserved in Svalbard Vault
Foundations

Academic Education

Strong foundation in software engineering and advanced research in computer science.

2023 - Present

MSc in Information Technology

SLIIT (Sri Lanka Institute of Information Technology)

Specialized in Generative AI architectures, SDLC workflow automation, and machine learning systems for enterprise optimization.

2018 - 2021

B.Eng. Software Engineering

IIC University, Cambodia

Comprehensive curriculum across Desktop, Web, and Mobile Development tracks, software architecture, algorithms, and distributed systems.

Second Upper Division | GPA: 3.56
Endorsements

Professional References

Leaders and mentors who have guided and supervised my enterprise software and engineering delivery.

Virtusa Corporation

Jeewaka Nuwan Fernando

Architect – Virtusa

Supervising enterprise software architecture, AI solutions delivery, and client engagement.

+94 77 220 0943
jeevakanuwan@gmail.com
Java Institute

Nirodha Rupasinghe

CEO – Java Institute

Academic leadership and early professional software engineering mentorship.

+94 71 335 3228
nirodha@javainstitute.edu.lk
Get In Touch

Let's Build the Next AI Innovation Together

Whether you are looking to architect custom enterprise RAG pipelines, deploy autonomous multi-agent workflows, or build high-throughput full-stack platforms, I'd love to connect.

Email (Click to Copy) dilshantilakaratne29@gmail.com
Phone (Click to Copy) +94 77 313 0036
LinkedIn linkedin.com/in/lasitha-thilakarathna-3027ab120 GitHub github.com/lasithadilshan
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