Billy Dharmawan
Senior Software Engineer at Afterpay
Sydney, New South Wales, Australia
Summary
👤
Senior🎓
Top SchoolBilly Dharmawan is a Senior Software Engineer based in Sydney with 9 years' experience building event-driven backend systems using Kotlin, Scala, Python, Kafka and AWS. He currently architects and decouples legacy services at Afterpay, with hands-on expertise in R2DBC, DynamoDB, Terraform and Kubernetes to deliver resilient production pipelines. Billy has a proven track record in fintech and neobanking, having implemented multiple Kafka pipelines for trading and payments flows and led data backfilling and integration efforts. He writes technical guides and tutorials on topics like Kotlin + Kafka + DynamoDB and local Kafka environments, reflecting a practical focus on developer experience and observability. Outside of code, he pairs disciplined engineering with entrepreneurial instincts—from running a personal training business to active investing—bringing persistence and pragmatism to complex system design.
9 years of coding experience
6 years of employment as a software developer
Bachelor’s Degree, Chemical Engineering/ Food Process Engineering, Bachelor’s Degree, Chemical Engineering/ Food Process Engineering at University of New South Wales
Indonesian
Github Skills (71)
aws-sdk9
amazon9
reactive-kafka8
aws8
pool8
serverless-framework8
aws-lambda8
java8
azure-functions7
amazon-certificate-manager7
serverless7
sdk7
high-performance7
mono7
lambda6
Programming languages (6)
Github contributions (5)
billydh/dynamodemo
Jan 2020 - Nov 2020
A Kotlin Spring Boot, Spring WebFlux based reactive DEMO application coupled with DynamoDB
Contributions:6 commits, 2 PRs, 4 pushes in 10 months
spring-bootspring-kotlincoupledkotlinspring
billydh/kotlin-kafka-dynamo-demo
Mar 2020 - Nov 2020
Contributions:8 commits, 6 PRs, 5 pushes in 8 months
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