Uses

A practical list of tools and habits I use to build and operate reliable systems.

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Infrastructure and Operations

For deployment, container orchestration, and production operations.

Kubernetes

Docker

Linux

Nginx

Prometheus

Grafana

Blackbox

Backend and APIs

For business logic, APIs, and system integration workloads.

Java

Spring Boot

Python

Erlang

PostgreSQL

MongoDB

Redis

Frontend and Product Surfaces

For dashboards, portals, and user-facing interfaces around platform systems.

React

Next.js

JavaScript

HTML

CSS

Workflow Principles

>Prefer clear, low-complexity architecture that is easy to operate.
>Ship in small, testable increments with rollback paths.
>Treat observability as a first-class part of the delivery lifecycle.
>Document configuration and operational runbooks for handovers.

Active Platform Build

Latest public system: microservicefrontend.rumalg.me

>Spring Boot microservice platform with API Gateway + Eureka + Redis and Auth0 identity flow.
>Gateway-centered trust model: validate JWT at the edge, sanitize internal headers, and relay only trusted identity context.
>Service-to-service reliability via retry/circuit-breaker policies and environment-driven rate-limit controls.

Monitoring in Production

Self-hosted systems should show live operational signals. This is not a vanity section; it demonstrates that the projects are designed, deployed, monitored, and operated.

Performance

>Average response time
>P95 latency
>Requests per minute
>Rate-limit hits

Reliability

>Failed request percentage
>Redis fallback usage
>Retry count
>Error categories

Infrastructure

>CPU usage
>Memory usage
>Container uptime
>Deploy count

Now Stack Projects