Harsha Lakmal
Senior Software Engineer
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About
Senior Software Engineer with 10+ years of experience building scalable microservices and API-driven systems using Node.js (NestJS, Express) and TypeScript. Proven track record delivering cloud-native fintech and SaaS solutions on AWS, integrating secure payment workflows (Stripe, PCI-compliant), and leading distributed teams. Experienced with AI-driven automation using OpenAI APIs. Currently based in Invercargill on an Open Work Visa — immediately available.
Experience
Senior Full-Stack Engineer at CS Tech (Ceylon Solutions) (2018-01 – 2025-02)
- Architected scalable microservices and event-driven serverless workflows on AWS (Lambda, S3, SQS, SNS, Step Functions) using TypeScript and NestJS.
- Reduced transaction failures by 20%
- Developed Stripe-integrated, PCI-compliant billing workflows
- Built AI-driven automation using OpenAI APIs and Apache Airflow: Regulatory Document Intelligence and Label Understanding Engine.
- Designed and integrated RESTful APIs ensuring high performance, security, and scalability across distributed systems.
- Cut deployment cycles by 30%
- Automated CI/CD pipelines with GitHub Actions and Jenkins
- Mentored distributed engineering teams and collaborated across product, QA, and DevOps in Agile/Scrum.
Software Engineer at Wollstra Tech (2016-01 – 2017-11)
- Designed and implemented RESTful APIs using Laravel (PHP) with TDD for a high-traffic logistics platform.
- Built and optimised Single Page Applications (SPA) using AngularJS, improving responsiveness.
- Containerised legacy systems with Docker, streamlining deployments across environments.
- Reduced feature delivery time by 15%
- Collaborated with QA and product managers
Software Engineer at Softcodeit Solutions (2014-12 – 2016-01)
- Developed responsive web applications using PHP (Laravel) and AngularJS with mobile-first design.
- Integrated third-party REST APIs for authentication, payments, and data synchronisation.
- Contributed to MySQL database design, query optimisation, and indexing for high-traffic components.
Education
MSc in Data Science – Cardiff Metropolitan University (2022 – 2024)
Bachelor of Computer Science (Hons) in Computer Science – Uva Wellassa University (2009 – 2013)
