Software engineer with 5+ YOE

Lavarthan Selvaratnam

Software engineer with 5+ YOE

Available to hire

Software engineer with 5+ YOE

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Work Experience

Senior Software Engineer at TimelinesAI
May 1, 2025 - Present
Remote role implementing a SugarCRM integration with FastAPI, DynamoDB, AWS App Runner; architecting webhook ingestion via API Gateway and Lambda with AWS SAM, Docker, ECR, and S3 for CI/CD and static assets. Designed an AI-driven SDR pipeline using n8n and multi-model agents (OpenAI, Claude) to scale outreach, scheduling, and deal tracking, reducing manpower by 50x. Developed MCP server compatible with OpenAI and Claude code connectors (Next.js) and deployed via Vercel CI/CD. Built Chrome extensions integrating WhatsApp Web with Pipedrive and modernized an extension for Chrome Manifest V3.
Senior Software Engineer at Creative Software
December 1, 2024 - April 1, 2025
Built and maintained backend integrations for Oneflow with LimeCRM, Upsales, Talentech, HubSpot, and Pipedrive using Python, Flask, and SQLAlchemy. Architected Slack integration for Oneflow; built integrations with Zapier and Microsoft 365, handling API design, data mapping, and workflow automation across platforms. Contributed to frontend with React/TypeScript and handled DevOps tasks including Docker and CI/CD via Bamboo on Ubuntu.
Software Engineer at Creative Software
May 1, 2022 - November 1, 2024
Built Zapier integration for Oneflow and published it to the Zapier Marketplace; developed Microsoft 365 and Pipedrive integrations using Python, Flask, and SQLAlchemy; supported frontend with React/TypeScript and assisted with Docker and Bamboo CI/CD.
Software Engineering Intern at WSO2
October 1, 2020 - April 1, 2021
Built an NLP-based search engine for Ballerina documentation using Python and Gensim, applying transfer learning on a 500K Stack Overflow Q&A dataset to improve search accuracy.
Freelance Software Developer at Self-Employed
October 1, 2018 - April 1, 2022
Built LLM-based applications and automation solutions via Upwork using OpenAI, AutoGen, DeepSeek, and LLaMA; deployed projects across AWS, GCP, and Heroku with CI/CD. Developed web scraping pipelines and API integrations for clients using Python and Selenium, including data scraping and Azure SQL database management for Net Zero Insights.

Education

Bachelor of Science Honours in Engineering at University of Moratuwa
January 1, 2017 - January 1, 2021

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Professional Services