Looking for a job

Carles Vargas

@carlesvargas

AWS Architect at Caylent who delivered multi-region reliability for mission-critical workloads with 99.99% availability.

United States

Message

At Caylent, I defined multi-region architecture for mission-critical AWS workloads across EKS, ECS, and Lambda, meeting internal SLOs and 99.99% availability. I also implemented health-based failover and autoscaling controls that maintained uptime during planned maintenance windows.

I automated infrastructure provisioning with Terraform, Helm, and CloudFormation, cutting provisioning lead time from four hours to under 20 minutes. I also reduced cloud spend by $1M per year through compute optimization and right-sizing.

At FoundationMedicine, I built Java and Python microservices for a clinical genomics platform used by hospitals and oncologists. I improved clinical report generation from hours to minutes by optimizing service hot paths, adding intelligent read replicas, and removing cross-service bottlenecks.

Earlier, at Loadsmart, I built logistics microservices and contributed to a zero-downtime MongoDB-to-PostgreSQL migration. At Contractize, I built a digital contract automation platform, and at To EatList, I built a mobile backend API and implemented an A/B test model that improved user engagement by 25%.

Experience

Work history, roles, and key accomplishments

AWS Architect

Caylent

Nov 2024 - Oct 2025 (11 months)

Defined multi-region architecture strategy for mission-critical workloads across EKS/ECS/Lambda and event-driven primitives, ensuring compliance with internal SLOs and 99.99% availability. Implemented operator-driven autoscaling patterns and automated infrastructure provisioning, reducing manual steps by 70%.

Go Python AWS Terraform CloudFormation Helm Prometheus Grafana Datadog SQS SNS VPC Networking AutoScaling Linux GitHub Actions Docker KMS WAF

Senior Software Engineer

Foundation Medicine

Apr 2020 - Nov 2024 (4 years 7 months)

Built backend microservices in Java (Spring Boot) and Python (Django/FastAPI) powering a clinical genomics platform used by hospitals and oncologists. Deployed and operated services across Azure Kubernetes (AKS) and AWS Lambda, and implemented SOC2+HIPAA-grade observability.

Spring Boot Python (Django FastAPI)Azure AKS ACR ARM Templates Event Hub Kafka RabbitMQ Redis PostgreSQL Elasticsearch Vault Istio React NextJS Capacitor Ionic Jest PyTest Prometheus Datadog ELK SOC2 HIPAA

Full Stack Engineer

Loadsmart

Apr 2019 - Mar 2020 (11 months)

Built internal logistics microservices using Go and Python/Django, and migrated infrastructure to GCP (GKE, Pub/Sub, CloudSQL). Designed and executed a MongoDB to PostgreSQL migration with zero data loss, improving consistency and query performance.

Go Python Django GCP GKE Cloud SQL Pub Sub Stackdriver PostgreSQL Redis Kubernetes Docker GitLab CI CD

Web Developer

Contractize

Jul 2016 - Mar 2019 (2 years 8 months)

Built a digital contract automation platform using Node.js (Express/NestJS) and React UI. Automated server provisioning and deployments using Ansible, eliminating manual sysadmin toil.

NodeJS NestJS Express React Next.js (SSR)PostgreSQL Ansible Nginx Docker Linux

Mobile Developer

To EatList

Aug 2015 - Jun 2016 (10 months)

Built mobile backend API using Node.js and Express, and implemented A/B test model improving user engagement by 25%. Used Vagrant to standardize development environment across team.

NodeJS Express React Native Ionic Vagrant REST APIs