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LakshithaWijerathne

AI Agent Developer + Full-Stack Software Engineer

I'm Lakshitha Wijerathne

Associate Software Engineer at BISTEC Global ServicesBSc (Hons) Computer Science · NSBM Green University

I started writing code in 2022 and have spent the years since shipping production software — from a 13-microservice travel marketplace to enterprise AI agents and MCP gateways running on Azure. I care about clean architecture, predictable systems, and details that hold up under pressure — the kind of engineering that keeps working long after launch.

Resume

Featured work

Final-Year Research, Affect-Aware E-Learning

AffectLearn

affectlearn.tech
AffectLearn screenshot
  • Next.js
  • FastAPI
  • LangGraph
  • MediaPipe
  • GPT-4o
  • Azure

AI Agent, MCP Gateway · BISTEC

Enterprise Expense Agent

Confidential
Microsoft Teams · confidential
Enterprise Expense Agent screenshot
  • .NET 10
  • MCP
  • Copilot Studio
  • Azure
  • Microsoft Graph
  • OAuth 2.1

AI Agent, Enterprise Platform · BISTEC

AI IT-Support for ServiceNow

Confidential
Copilot Studio · confidential
AI IT-Support for ServiceNow screenshot
  • .NET 10
  • MCP
  • ServiceNow
  • Copilot Studio
  • Cosmos DB
  • Bicep

RAG, Document Q&A

DocMind

docmind · Azure Container Apps
DocMind screenshot
  • FastAPI
  • LlamaIndex
  • Qdrant
  • OpenAI
  • Next.js
  • Azure Container Apps

AI Marketplace, Microservices

Travel Plan Platform

travel-plan.live
Travel Plan Platform screenshot
  • Spring Boot
  • Kafka
  • Google Gemini
  • Next.js 16
  • Supabase
  • Docker

Experience

Where I've worked & studied

  1. 2026

    Associate Software Engineer

    Now

    BISTEC Global Services · Jan 2026 — Present

    • Building production AI agents on the Agent Accelerator team.
    • Multi-tenant MCP gateways in .NET 10 powering Copilot Studio agents in Teams — OAuth 2.1 with dynamic client registration and Entra ID On-Behalf-Of passthrough.
    • Shipping to Azure with Bicep IaC, Azure DevOps CI/CD with SAST scanning, and Azure Marketplace packaging.
    • .NET 10
    • MCP
    • Copilot Studio
    • Azure
    • Bicep

  2. 2025

    AI Agent Developer

    Now

    Upwork · Freelance · Sep 2025 — Present

    • Building AI agents, RAG systems and n8n automation workflows for businesses.
    • Shipped DocMind, a production RAG document Q&A platform on Azure Container Apps.
    • Built a five-agent n8n pipeline that turns a topic into a fact-checked, publication-ready article.
    • RAG
    • n8n
    • LlamaIndex
    • Qdrant
    • OpenAI

  3. 2025

    Software Engineer Intern

    BISTEC Global Services · Aug 2025 — Jan 2026

    • Built QuizBank, a multi-tenant AI evaluation platform, end to end.
    • Clean Architecture .NET 9 API with CQRS, Next.js 15 frontend and GPT-4o question generation.
    • R&D on Cloudflare, Supabase and Google ADK.
    • .NET 9
    • Next.js 15
    • PostgreSQL
    • GPT-4o
    • Docker

  4. 2025

    Technical Writer

    Now

    Medium · Mar 2025 — Present

    • Technical articles that turn complex software engineering concepts into clear, practical reads for developers.
    • AI Agents
    • MCP
    • Architecture

  5. 2022

    BSc (Hons) in Computer Science

    NSBM Green University · 2022 — 2026

    • Specializing in AI & Full-Stack.
    • Final-year research: AffectLearn, an affect-aware adaptive e-learning platform — 0.92 engagement AUC, live at affectlearn.tech.
    • AI
    • Full-Stack
    • Research

  6. 2019

    St. Thomas' College, Matale

    O/Ls & A/Ls · Physical Science · Until 2019

    • The foundation years of discipline and teamwork, capped with a Colours award at the 2019 Colours Night.
    • Colours Award

Projects

Skills

  • LanguagesC#, Python, TypeScript, JavaScript, Java, SQL, Dart, C
  • Web & MobileASP.NET Core, Next.js, React, Spring Boot, FastAPI, Tailwind CSS, Node.js, Flutter, Streamlit, WebSockets
  • AI & AgentsMCP, Copilot Studio, Google ADK, LangChain, LangGraph, Semantic Kernel, OpenAI API, Azure OpenAI, Gemini, RAG & Hybrid Search, n8n, LlamaIndex
  • Machine LearningPyTorch, scikit-learn, MediaPipe, ONNX Runtime, OpenCV, Hugging Face, QLoRA / PEFT
  • DataPostgreSQL, Qdrant, Azure AI Search, Supabase, Firebase, Redis, MongoDB, Cosmos DB, SQL Server
  • Cloud & DevOpsAzure, Azure DevOps, Docker, GitHub Actions, Bicep, Kafka, Cloudflare, Git
  • Testingpytest, Vitest, Playwright

AchievementsandCertifications

View all

Achievements

  • 2ndPandora '26 — RAG BuilderthonNSBM Green University · ASE
  • 5thDuothan 5.0 HackathonNSBM Green University · IEEE
  • The BISTEC team at Hearts Academy Day 2026
  • Team Zeylix receiving the 1st Runner-Up award at the Pandora '26 RAG BuilderthonPandora '26 RAG Builderthon · 2nd Place
  • Team Zeylix at Pandora '26Team Zeylix · Pandora '26
  • Delegate at the In Pursuit of AI expo
  • Internal hackathon team at BISTEC
  • Receiving the Duothan 5.0 certificate on stageDuothan 5.0 Hackathon · 5th Place
  • Team 404_NOTFOUND at Duothan 5.0Team 404_NOTFOUND · Duothan 5.0
  • Limitless workshop with colleagues
  • Recognition at BISTEC Hearts Academy
  • Working session with the team at BISTEC

Contact

Tell me what you’re building — an AI agent, an automation, or a full web or mobile app. I usually reply within 24 hours.

Lakshitha Wijerathne

Colombo, Sri Lanka

lakshitha.dev@outlook.comLinkedIn

Freelance — AI Agent Developer

I build AI agents, RAG systems and n8n automations for businesses, available through Upwork.

Hire me on Upwork