Adam Kalinowski

Software Engineer, L3

• Maintaining and modernizing the Dropbox Paper service.
• Led the migration of the backend engine from Rhino to GraalVM.
• Proposed and implemented an overhaul of the service’s monitoring and observability.

Software Engineer II · Ring

Developed and maintained Ring’s new platform for internal service communication, replacing a peer-to-peer AWS SNS/SQS approach. The service was showcased at AWS re:Invent.

• Led the addition of a fallback MSK (Kafka) cluster, creating an active/active architecture that keeps traffic flowing if a single cluster fails.
• Reworked Kafka partition assignment to stop assigning “cold” partitions, cutting P99 latency spikes during scale-out from ~20 s to under 300 ms. Patented as US-12309441.
• Added availability-zone-aware partition assignment, reducing data-transfer costs by 90%.
• Led a 6-month migration to a multi-cell architecture, so the service could serve different use cases in isolation.
• Built a custom circuit breaker that shifts traffic immediately between fallback options.

Java · TypeScript (CDK) · CloudFormation · DynamoDB · SQS/SNS · Lambda · ECS/Fargate · MSK

Software Engineer

Built an e-commerce site for industrial supplies for an S&P 500 company with Node.js and React.

Software Engineer

Created a WYSIWYG editor for generating dynamic fund pages, then shipped it to clients via iframes and micro-frontends — IE11 included.

Front-end Engineer

Built a promotional campaign site for przepisy.pl.