Full-stack engineer with 4+ years building production systems at scale. Currently at Alloha Fibra — Brazil's largest independent ISP — working on performance-critical APIs, voice infrastructure, and system migrations.

Delivered up to 60% API response time improvements through query optimization and caching. Shipped systems serving millions of customers.

Languages — TypeScript · JavaScript · Python · Java · Kotlin · Rust

Frontend — Vue.js · React · Next.js · Nuxt.js · React Native

Backend — Node.js · NestJS · Express · Flask · PostgreSQL · Redis

Infrastructure — Docker · Kubernetes · Terraform · AWS · GCP · OCI

Observability — New Relic · Grafana · Sentry · OpenTelemetry

Architecture — DDD · Hexagonal · Event-Driven · SOLID

mateCreations Cross-app theme ecosystem for Obsidian, Neovim, VS Code and Zen Browser — earthy palette, automatic light/dark switching via systemd and GitHub Actions release pipeline.

AI Workflow System Personal automation pipeline built on Claude API: voice recording → Whisper transcription → structured notes; YouTube and article ingestion with AI summarization; git hooks generating contextual project notes in background. Bash · Python · Claude API · faster-whisper

Codex Cross-platform book discovery app (Desktop / Android / iOS) with extension-based source architecture. No ads, no tracking. Kotlin · Compose Multiplatform · Ktor

oracle-k8s Kubernetes cluster on Oracle Cloud Free Tier, fully provisioned with Terraform — compute, networking and load balancer as code. Terraform · Kubernetes · OCI

Notes on software, tools and the work of building things — nicholas-velten.xyz

nicholas-velten.xyz · LinkedIn · nikvelten@gmail.com