Julio A.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Full-Stack Developer & DevOps Engineer with over 5 years of experience with modern programming languages such as Go, TypeScript, Rust, Python and C#. What I've built: - Real-time collaborative editors with per-organization workspaces, live presence and full-text search. - Multi-tenant REST APIs with JWT auth, Redis caching and search indexing. - A smart-locker platform with card payments, device control over MQTT and six hardware vendor integrations. - A document search service with Apache Lucene, S3-backed indices and scheduled ingestion jobs. Front End: - Next.js 16, React 19, TypeScript - Tailwind CSS v4, shadcn/ui, Radix - Real-time collaboration (Yjs, PartyKit, Convex) - Rich-text and canvas editors (BlockNote, Lexical, React Flow) Back End: - REST APIs in Go, Python, C# and TypeScript - Event-driven services with RabbitMQ, MQTT and cron jobs - WebSockets for live data - Documented APIs with OpenAPI (Swagger, Scalar) - Auth providers: Clerk, Cognito, Keycloak, Better Auth, custom JWT DevOps: - Terraform - Kubernetes (EKS, LKE) - Docker multi-stage builds and minimal runtime images CI/CD: - GitHub Actions (lint, build, test, deploy) - Container Registries (GitHub, AWS, DigitalOcean) - Automated Kubernetes rollouts with Slack notifications Cloud Providers: - AWS (EKS, ECR, S3, Cognito, SES) - Vercel - Linode - DigitalOcean Databases: - PostgreSQL - MySQL / MariaDB - MongoDB - Redis, Memcached - Meilisearch, Apache Lucene AI Tools: - Claude Code - AI Agent Orchestration AI Development: - Vercel AI SDK (streaming, tool calling) - RAG Teamwork and Collaboration: - Jira Programming languages: - Go - TypeScript - Rust - Python - C# Frameworks: - Next.js - Echo - FastAPI - ASP.NET Core - Electron