Rayhan Hossain
Software Engineer at Microsoft
Greater Seattle Area, WA, USA, Bangladesh
Summary
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RockstarRayhan Hossain is a Senior Software Engineer with over a decade of experience building scalable, high-availability distributed systems across cloud and on-prem environments. Currently leading a database product within Microsoft Azure Cosmos DB, he blends deep backend and DevOps expertise—particularly in Kubernetes, PostgreSQL, and MongoDB—to deliver production-ready distributed databases. His prior work at AWS includes designing ECS Service Connect, automating region build pipelines, and contributing substantive OpenTelemetry and Fluent Bit integrations that improved observability for containerized workloads. Rayhan’s background spans low-level systems (compiler/runtime work with LLVM) to big data and ML (Hadoop, Spark, scikit-learn), giving him a rare full-stack systems perspective. An active open-source contributor, he’s driven key improvements in widely used projects like the OpenTelemetry Collector and Fluent Bit, including AWS-specific receivers and CloudWatch EMF support. Practical, detail-oriented, and fluent across cloud infra to systems internals, he often bridges product engineering and operational automation to accelerate safe rollouts.
12 years of coding experience
Github Skills (33)
amazon-kinesis10
github-ci10
docker10
observability10
data-collection10
amazon-ecs10
testing10
bash10
c1110
go-testing10
kin10
dockers10
cicd10
c1710
go10
Programming languages (12)
Github contributions (5)
aws/aws-for-fluent-bit
Oct 2019 - Jul 2021
The source of the amazon/aws-for-fluent-bit container image
Role in this project:
DevOps Engineer
DevOps EngineerContributions:5 releases, 86 reviews, 41 commits in 1 year 9 months
Contributions summary:Rayhan focused on enhancing the integration tests and CI/CD pipeline for the `aws/aws-for-fluent-bit` repository. Their work included adding integration tests for Kinesis data streams and S3 bucket validation and cleanup, indicating a focus on data ingestion and storage. Furthermore, the user modified the `integ.sh` script to control testing stages and added the ability to publish and verify images using a CI/CD pipeline. This suggests a significant role in automating build, test, and release processes.
awscontainer-imagefluent-bit
aws-observability/aws-otel-collector
Oct 2020 - Nov 2021
AWS Distro for OpenTelemetry Collector (see ADOT Roadmap at https://github.com/orgs/aws-observability/projects/4)
Role in this project:Backend Engineer
Backend EngineerContributions:46 reviews, 14 commits, 7 PRs in 1 year 1 month
Contributions summary:Rayhan primarily contributed to the `aws-otel-collector` repository by enabling and updating components, specifically related to the `awsecscontainermetrics` receiver and `metricstransform` processors. Their work involved modifying configuration files and dependencies (go.mod), adding functionality and updating the collector with the latest versions of the relevant components. The user also addressed issues and integrated changes, including placeholder support for log groups and streams in the `awsemfexporter`.
awsobservabilityopentelemetry-collectoropentelemetry
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