Irish John Lomangaya

Work directly with an Australian technology company as a Senior Software Engineer contributing to production systems across consumer, social, and organization management platforms. Build scalable backend services in TypeScript and Node.js using SST and AWS SDK, and architect AWS infrastructure as code via AWS CloudFormation using AWS CDK and SST. Implement event-driven and asynchronous architectures using EventBridge, SQS, SNS, and DynamoDB Streams; design multi-step business processes with Step Functions; and support multi-tenant SaaS deployments for reseller and partner-based deployments. Manage a learn-based monorepo containing multiple backend microservices, including shared packages, service dependencies, and development workflows, while automating deployments via CI/CD. Design and scale file and media workflows using S3 with auto-scaling image processing pipelines; integrate real-time chat and payment/subscription workflows (e.g., Stripe, Apple Pay); implement push notifications

Developed scalable REST API endpoints and authored/maintained GraphQL APIs using AWS AppSync. Deployed as a Senior Backend Engineer for an Australian client and designed event-driven architecture solutions leveraging AWS services. Authored and maintained project documentation using Confluence. Built and updated API endpoints based on project requirements, including a license service and product management system using Stripe. Worked extensively with DynamoDB in a single-table design using ElectronDB, leveraging the SST framework on top of AWS CDK. Developed services from scratch with high scalability and reliability, integrating payment workflows with Stripe and implementing push notification integrations using Firebase and AWS SNS. Designed push notification architecture for Android and iOS, and implemented webhooks for Apple in-app purchase notifications. Created cross-service event trigger patterns using AWS EventBridge (Event Bus) and developed a social-media-like content platform

Created scalable API endpoints for multiple projects and deployed to Paymaya terminal mesh team. Ensured proper documentation and reporting across stages of the development cycle using OpenAPI. Built and updated endpoints based on client needs; worked primarily with PostgreSQL and DynamoDB. Maintained microservices written in Sails.js and NestJS framework, and set up CI/CD integration testing using Gauge framework. Supported serverless platform development on AWS and used TypeScript and JavaScript for project work, ensuring compliance with company GitLab CI/CD standards. Contributed to microservice creation, chose design patterns aligned with service requirements, created Docker images, estimated task effort, and coordinated with QA teams to ensure feature quality.