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Md Arbin

@mdarbin

Senior Back End Engineer at FloSports, building Rails and Go services and internal operations APIs for real-time decisioning.

United States

Message

What I'm looking for

I’m ready to own backend services and internal tooling APIs for the Back Office platform at PrizePicks.

At FloSports, I built and owned backend services across a Rails monolith and Rails and Go microservices. I also built internal operations APIs for real-time decisioning, including content scheduling, alerting, and account operations tooling.

I contributed to FloSports’ monolith-to-microservices migration and implemented asynchronous workflows with Sidekiq and Kafka. Under live event load, I optimized PostgreSQL queries and added caching where measurement showed real gains.

At Stripe, I developed Go and Ruby backend services and public APIs for a payments platform, and built Kafka integrations to propagate payment events between services. Earlier at Guardant Health, I built Ruby and Python services and REST APIs for laboratory operations systems.

Experience

Work history, roles, and key accomplishments

Senior Back End Engineer

FloSports

Jan 2022 - Sep 2026 (4 years 8 months)

Built and owned backend services across a Rails monolith and a growing ecosystem of Rails and Go microservices, designing features from API contracts through deployment and monitoring. Led design and implementation of complex features end to end, from product requirements through production deployment.

Ruby on Rails Go Microservices Kafka Sidekiq PostgreSQL Docker Kubernetes Observability CI CD

Senior Backend Engineer

Stripe

Sep 2019 - Dec 2021 (2 years 3 months)

Developed backend services and public APIs in Go and Ruby for a payments platform, emphasizing backward-compatible contracts and predictable failure behavior. Built event-driven integration with Kafka to propagate payment events between services, replacing synchronous coupling.

Go Ruby Kafka PostgreSQL Kubernetes Terraform AWS Observability

Software Engineer

Guardant Health

Jul 2016 - Sep 2019 (3 years 2 months)

Built backend services in Ruby and Python for laboratory operations systems, exposing REST APIs that internal teams used to track specimen processing status. Designed PostgreSQL schemas for specimen metadata and workflow events.

Ruby Python REST APIs PostgreSQL CI CD