Tooling

Tooling used across platform operations, backend delivery, observability, and deployment workflows.

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Infrastructure and Operations

For deployment, container orchestration, Linux administration, and production operations.

Kubernetes (R&D / Lab)

Docker

Podman

RHELUbuntu ServerBashGitHub Actions

Nginx

Prometheus

GrafanaNagiosBlackbox Exporter

Backend and APIs

For business logic, APIs, and system integration workloads.

Java

Spring Boot

PythonFastAPI

Erlang/OTPGo

C++

PostgreSQLMariaDB

MongoDB

RedisClickHouse

Telecom and Production Support

For SMS Firewall implementation, incident response, and carrier-grade messaging platforms.

SMS FirewallSS7MAPM3UASCTPSIGTRANSMPPSCCPTCAPL1/L2/L3 SupportRoot Cause Analysis

AI / LLM Engineering

For learning and experimenting with language-model architecture, training, evaluation, and local inference.

PyTorchTransformersBPE TokenizationCUDAMixed PrecisionOllamaQuantizationModel Evaluation

Frontend and Product Surfaces

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

React

Next.js

React Native

TypeScript

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

Public backend platform: 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

Operational visibility for deployed services, including runtime metrics, health checks, failure signals, and alertable service indicators.

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

Current Work Tech Stack Projects