Featured system
GameWiz Multiplayer Platform
General-purpose asynchronous multiplayer backend with authentication, session orchestration, and stateless cloud deployment patterns.
GoFirebaseDockerCloud Run
View detailsMFVDEV
Software systems.
Polished interfaces.
Modern web experiences.
Independent engineering studio by Mario Flores. I help companies with Seattle freelance SDE engagements, AWS backend engineering, infrastructure engineering, and app development delivered with product polish and production-minded execution.
Enterprise web appsAdvanced backendCloud architectureInteractive experiencesEnterprise web appsAdvanced backendCloud architectureInteractive experiences
Web Development
Freelance SDE support for high-conversion websites, customer portals, and polished product surfaces that need to feel premium and perform well.
App Development
App development for product teams that need responsive user experiences and the backend systems that keep them reliable across devices.
Backend Systems
AWS backend engineer support for APIs, service architecture, and cloud-native infrastructure with reliability, observability, and maintainability built in.
Interactive Experiences
Interactive product experiences with strong frontend craft, motion systems, and performance-aware implementation.
Selected projects
Work shaped by systems thinking and product polish.
Professional experience
AWS Internal Platform Work
Backend services and developer tooling built with native AWS infrastructure, CI/CD, observability, and production-scale engineering rigor.
AWSCDKLambdaDynamoDB
View detailsEngagement process
Clear process. Strong foundations. Better outcomes.
01
Discovery
We define the business goal, success criteria, audience, and technical constraints before writing implementation detail.
02
Architecture
We shape the system, interface patterns, and delivery plan so design polish and technical resilience move together.
03
Development
We build with production-minded quality, thoughtful motion, and clear communication throughout the engagement.
04
Deploy and optimize
We ship cleanly, measure real usage, and refine the experience so the result performs beyond launch day.
Let's build something exceptional
Tell me about the project you want to launch.
Let's connect. If you're looking for a Seattle freelance SDE, an AWS backend engineer, an infrastructure engineer, or an app development partner, I can help shape the project into a polished, high-performing product from California and remotely.
Senior engineering expertise
AWS and cloud systems
California-based, serving Seattle and remote teams