I do magic on AWS without breaking things ☁️
I'm David Cuy, a Cloud Architect based in Mérida, MX. I design pragmatic systems on AWS, lead engineering teams, and write about the tradeoffs nobody warned you about.
Architecture is tradeoffs. Not slogans.
Over the last decade I've helped teams migrate off mainframes, re-platform on AWS, un-microservice when they got too clever, and write ADRs people actually read.
In theory, event-driven decouples everything. In practice, you've moved the coupling into a schema registry nobody owns. What actually works: boring decisions, well-documented, and retry logic that fits in three lines.
Read the full storyA decade, a few war stories.
Head of Dev & Architecture
Leading the platform re-org — fewer microservices, more ADRs, 400ms off p99.
Architect Lead
Designed cloud-native architectures for enterprise clients. Event-driven where it makes sense, sync where latency matters.
Technical Lead
Led the mobile payments team. Migrated to AWS, handled production incidents, and the art of saying "not yet" to features.
Solution Architect
Serverless architectures for startups. Learned when NOT to reach for Lambda the hard way.
The tools I reach for almost every day.
AWS
Lambda, ECS, EventBridge, SQS, VPC. Everyday toolbox.
Pulumi
IaC in TypeScript. Better than YAML, worse than Terraform in some cases.
CloudFormation
AWS's native tool. When the team refuses to learn another DSL.
Docker
Containers, multi-stage builds, and knowing not everything needs to be dockerized.
GitHub Actions
CI/CD that fits in a repo. Matrix, composites, reusable workflows.
CloudWatch & Grafana
Observability. If you don't have a p99 on a chart, you're not in production.
What people who worked with me say.
David has a rare combination of deep technical expertise and people skills. He knows what and when a solution is required while balancing product and business. I recommend him for any strategic role.
Excellent professional with deep knowledge of modern architectures, AWS and cloud services. Creative, with a comprehensive vision. A pleasure to collaborate with.
I've known his work for over 10 years. Expert in cloud solutions, tech architecture design and software development. He'll be a great asset to your company.
Recent essays from the blog.
Por qué pusimos un CDN frente a nuestro balanceador de carga (y por qué las cookies fueron el verdadero problema)
La barra de café de mi esposa, un bloqueo de Meta y una wallet que no tenía planeada
Quería un sistema de fidelidad simple para la barra de café de mi esposa. Meta me bloqueó a medio camino. Lo que construí después fue mucho mejor que el plan original — y casi todo el criterio fue mío, no de la IA.
Cómo uso Mermaid para comunicarme con producto, arquitecturar con devs y documentar todo al mismo tiempo
Mermaid no es solo una herramienta de diagramas. Es la forma en que los diagramas dejan de ser documentación que envejece y se convierten en parte viva del sistema.
Does your system need a second pair of eyes?
Architecture reviews, new system design, or fractional tech leadership. First 30-minute call always free.