Open to opportunities

Raul Calzada

@raulcalzada

I build high-throughput Go services, Kubernetes automation, and reliable distributed platforms.

I've built production Go services, APIs, and cloud platform tooling for Braincheck's PrecisionMed, including Kubernetes controllers that reduced repeated manual platform work by about 60%.

Across Braincheck, SSE Global, and Pufferfish Consulting, I've delivered gRPC and REST services, event-driven integrations, and secure healthcare and FinTech workflows using Kafka, NATS, PostgreSQL, Redis, Kubernetes, and cloud-native delivery pipelines. My profiling and performance work reduced memory use by about 25%, improved peak throughput by roughly 40%, and helped teams diagnose production issues faster.

I also lead architecture and code reviews, mentor engineers, document operational decisions, and turn incomplete requirements into supportable production releases.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Braincheck

Jan 2023 - Jan 2026 (3 years)

Owned Go backend services for PrecisionMed, defining concurrency boundaries with goroutines, channels, contexts, cancellation, and bounded worker patterns. Implemented Kubernetes-native controllers and shipped production gRPC and REST APIs in Go.

Senior Software Engineer

SSE Global

Feb 2020 - Dec 2022 (2 years 10 months)

Delivered Go, Java, Node.js, and FastAPI services for TeleCare Connect and FinFlow Gateway, with Go handling latency-sensitive API and messaging paths. Defined gRPC and REST service contracts and introduced Go-based Kubernetes automation.

Go Java Node fastAPI gRPC REST PostgreSQL Redis MySQL MongoDB DynamoDB Kafka RabbitMQ NATS Kubernetes Controller Runtime Docker Terraform CloudFormation GitHub Actions Azure DevOps OpenTelemetry Metrics JWT

Full Stack Software Engineer

Pufferfish Consulting

Aug 2012 - Dec 2019 (7 years 4 months)

Delivered SecureOps Suite, GameTrack Platform, and RxConnect Portal across enterprise, gaming, and healthcare engagements. Introduced Go for high-concurrency service components and implemented REST services with event-driven integrations.

Go Java Python C#PHP Laravel REST PostgreSQL MySQL MongoDB Redis Kafka RabbitMQ Docker Kubernetes Git Bitbucket Pipelines JWT React Vue.Js TypeScript JavaScript

Full Stack Developer

Inland Mineral Management

Aug 2006 - Aug 2012 (6 years)

Developed MineralTrack as an internal operations platform for mineral rights, leases, production records, and reporting. Structured backend components around clear data-access and business-service boundaries using Java, PHP, MySQL, and later MongoDB.