Thejan Rajapakshe

Thejan Rajapakshe

Lead Data Analytics Consultant

Experienced Software Engineer with a PhD in Deep Learning, passionate about pushing the boundaries of AI. Specializing in Large Language Models, Reinforcement Learning, and Quantum Machine Learning.

10+ Years ExperiencePhD in Deep LearningBrisbane, Australia

Research Interests

Pushing the boundaries of artificial intelligence through interdisciplinary research

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Large Language Models

Researching and developing cutting-edge LLM applications, including Speech Emotion Recognition and Natural Language Understanding systems.

GPTTransformersNLUSpeech Recognition
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Reinforcement Learning

Published research on Deep RL for Speech Emotion Recognition, including novel pre-training strategies and domain adaptation techniques.

Deep RLPolicy LearningDomain AdaptationPre-training
鈿涳笍

Quantum Machine Learning

Exploring parameterised quantum circuits for representation learning, with published work in Scientific Reports on QML for affective computing.

PQCHybrid ModelsQubitsEntanglement
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Neural Architecture Search

Developed emoDARTS - a DARTS-optimised joint CNN and Sequential Neural Network architecture achieving superior performance in emotion recognition.

DARTSAutoMLCNN-LSTMOptimization

Experience

10+ years of building software solutions and leading technical teams

Lead Data Analytics Consultant

Auto & General Australia

Aug 2024 - Present

Brisbane, Queensland

Leading data analytics initiatives in the insurance sector, driving insights and strategy through advanced analytics.

Data AnalyticsLeadershipStrategy

External Lecturer

University of Southern Queensland

May 2024 - Aug 2024

Queensland, Australia

Teaching and mentoring students in computer science and data science disciplines.

TeachingMentorshipAcademia

Consultant

Cognizant Servian

Jul 2022 - Jul 2024

Brisbane, Queensland

Cloud Data Engineer working on projects for Senex Energy and Shell Energy. Designed and developed cloud-based serverless data ingestion pipeline applications.

GCPCloud ArchitectureData EngineeringServerless

Full Stack Engineer

germain APM

Feb 2022 - Jun 2022

Remote

Full stack development for application performance monitoring solutions.

Full StackAPMReactNode.js

Associate Technical Team Lead

CodeGen International

Feb 2016 - Feb 2022

Colombo, Sri Lanka

Led Research & Development initiatives including the Lia intelligent chatbot platform and FLAiR Suite - AI-powered tools for travel industry.

Team LeadershipAI/MLJava Spring BootKubernetes

Publications

Research contributions in Deep Learning, Speech Recognition, and Quantum ML

Representation learning with parameterised quantum circuits for advancing speech emotion recognition

Featured

Scientific Reports (Nature)2025

with R. Rana, F. Riaz, S. Khalifa, B.W. Schuller

Domain Adapting Deep Reinforcement Learning for Real-World Speech Emotion Recognition

IEEE Access2024

with R. Rana, S. Khalifa, B.W. Schuller

emoDARTS: Joint Optimization of CNN and Sequential Neural Network Architectures for Superior Speech Emotion Recognition

Featured

IEEE Access2024

with R. Rana, S. Khalifa, B. Sisman, B.W. Schuller, C. Busso

A Novel Policy for Pre-trained Deep Reinforcement Learning for Speech Emotion Recognition

ACSW 20222022

with R. Rana, S. Khalifa, J. Liu, B. Schuller

Pre-training in Deep Reinforcement Learning for Automatic Speech Recognition

ICASSP 20202020

with S. Latif, R. Rana, S. Khalifa, B.W. Schuller

Daemo: A Self-Governed Crowdsourcing Marketplace

UIST 20152015

with S. Gaikwad, D. Morina, R. Nistala, et al.

Featured Projects

A selection of impactful projects from AI platforms to cloud data engineering

Lia - Intelligent Chatbot Platform

AI-powered chatbot platform with Natural Language Understanding, context awareness, and peer-to-peer chat capabilities. Features both bot and human agent interactions.

2019 - 2022

Java Spring BootPython NLUAngularKubernetes

FLAiR Suite

AI-powered toolkit for travel industry supporting intelligent customer journey optimization and conversion rate improvements. Built as SaaS with multi-tenancy.

2019 - 2022

AI/MLSpring BootAngularDocker

Sense Crawler

Distributed automated crawling platform with parallel client execution on Hadoop cluster. Master node manages task distribution for scalable data collection.

2018 - 2021

HadoopElasticSearchSeleniumMQTT

Inspire - Personalization Engine

2-in-1 user profiling and recommender engine using collaborative filtering, SVDs, and deep learning for personalized recommendations.

2017 - 2019

SparkImage RecognitionSpring BootHadoop

Senex Energy Data Platform

Led cloud data engineering initiatives, designing and implementing serverless data pipelines on Google Cloud Platform.

2023 - 2024

GCPBigQueryCloud FunctionsPython

Shell Energy Data Pipeline

Cloud-based serverless data ingestion pipeline applications for energy sector analytics and reporting.

2022 - 2023

GCPServerlessData EngineeringETL

Skills & Education

Technical expertise built over 14+ years of software engineering and research

Technical Skills

AI & Machine Learning

Deep LearningReinforcement LearningLLMsQuantum MLNeural Architecture SearchSpeech RecognitionNLP/NLUComputer Vision

Programming & Frameworks

PythonJavaSpring BootPyTorchTensorFlowAngularReactTypeScript

Cloud & Infrastructure

Google Cloud PlatformBigQueryCloud FunctionsKubernetesDockerServerlessCI/CDTerraform

Data Engineering

Data PipelinesETL/ELTApache SparkHadoopElasticSearchSQLNoSQLData Modeling

Education

Doctor of Philosophy (PhD)

Computer Science - Deep Learning

University of Southern Queensland

Queensland, Australia

2019 - 2022

Bachelor of Applied Sciences

Mathematics and Computer Science

Rajarata University of Sri Lanka

Sri Lanka

2011 - 2015

Bachelor of Information Technology

Information Technology

University of Colombo, School of Computing

Sri Lanka

2012 - 2015

Certifications

Build Basic Generative Adversarial Networks - DeepLearning.AI

Deep Reinforcement Learning 2.0 - Udemy

Neural Networks and Deep Learning - Coursera

Improving Deep Neural Networks - Coursera