Sajith Herath-| https://sajithdherath.github.io | -
Skills
Languages: Python, Bash, SQL
Libraries: FastAPI, Pandas, Celery, Numpy, Agno, LangGraph, Pytorch, Tensorflow, scikit-learn, FFmpeg, OpenCV, Selenium
Databases: PostgreSQL, MongoDB, DynamoDB, Redis, ArangoDB, Chroma
Tools & Platforms: AWS (EKS, Step Functions, EC2, Lambda, Sagemaker), GCP, Docker, Kubernetes, Nginx, Apache Airflow
Experience
Lead Software Engineer, PrimeSens LLC – Colombo, Sri Lanka
Apr 2024 – Present
● Designed the system architecture and led the development team to build LLM powered microservices for a Customer
Relationship Management (CRM) platform, featuring intelligent lead scoring and an agentic AI chatbot that
streamlined customer interactions through deal prioritization and automated actions
● Developed an analyzer for rent roll and T12 statements utilizing LLMs, automatically extracting tabular data from
diverse PDF and spreadsheet formats and unifying inconsistent headers to accelerate real estate financial analysis
Senior Software Engineer, PrimeSens LLC – Colombo, Sri Lanka
Aug 2021 – Apr 2024
● Reduced AWS server costs by 89% by designing a GPU accelerated video transcoding solution(an AWS MediaLive
substitute), and engineered a real-time closed captioning engine utilizing speech-to-text machine learning models
● Developed multivariate time series forecasting models for geo-specific mortgage rates, delivering actionable insights
that enhanced financial analysis and investment strategies for investors
● Engineered a recommendation system using Collaborative Filtering and a CNN facial classifier, powering AR try-on
experiences to enhance e-commerce personalization and customer satisfaction
● Designed and deployed scalable microservices for a unified social media management platform, integrating
Facebook/Instagram/X/LinkedIn APIs and managing via Kubernetes for robust performance and reliability
● Developed high-throughput post schedulers processing complex media files and optimized data analysis across 50+
metrics, delivering key social media insights for strategy
Software Engineer, Self Employed
Oct 2020 – Aug 2021
● Built and scaled automated ETL pipelines using Apache Airflow for SEC Form 4 data, processing 5 million historical
records and over 3,000 daily filings to power robust insider trading analytics and compliance monitoring
● Developed and maintained web scrapers for over 8,000 companies, enriching Form 4 datasets and optimizing data
processing workflows to deliver actionable trading insights and enhance investment decision making
● Designed and implemented REST APIs (FastAPI) and microservices, including real-time video streaming solutions using
AWS Chime, FFmpeg, and WebRTC, to support scalable and interactive application features
Software Engineer, Arimac Lanka (pvt) Limited – Colombo, Sri Lanka
Jul 2019 – Sept 2020
● Engineered multi-platform integrations for a social listening tool, expanding data extraction across various channels to
enable comprehensive analysis of trends, conversations, and brand sentiment for clients
● Integrated SERP analysis to enhance a social listening tool, enabling extraction of web search data to provide richer
context and comprehensive brand insights alongside social media analysis
Software Engineer Intern, Fortunaglobal (pvt) Limited – Colombo, Sri Lanka
Jul 2017 – Jul 2018
● Developed fintech chatbots using fuzzy logic and sequence ML models, enabling automated handling of customer
inquiries and providing secure access to essential online banking functionalities
● Built a dashboard visualizing chatbot interactions and managed secure on-premise deployment, ensuring compliance
with strict banking security standards for the conversational AI system
Education
University of Westminster – BEng in Software Engineering (First Class Honours)
Sept 2015 - Aug 2019
