Real-Time Distributed Chat System
Built chat to learn what breaks when one server becomes many. Stack: Go, WebSocket, Redis, Docker.
Luka.
Software Engineer
Full-stack engineer with a strong focus on Go and infrastructure. I write backend services and make sure they can be monitored, scaled and run reliably in production. I'm currently at Sporting Rock; my code lives on GitHub.
Most of what I build ends up in projects, and what I learn along the way ends up in writing. Based in Belgrade, open to remote, hybrid and on-site work.
Experience
LinkedInFull-stack Software Engineer, Sporting Rock
Software Engineer, Engineering Software Lab Serbia
- Build and maintain production services for enterprise healthcare workflows, with ownership across validation, authorization, and failure-mode handling.
- Design asynchronous coordination flows for reliability, caching, and cross-service communication.
- Own data workflows, schema evolution reviews, and migration planning across multiple database-backed products.
- Manage delivery pipelines, release cycles, quality gates, and production debugging with focus on predictable handoffs.
- Collaborate through planning rituals, code reviews, architecture reviews, and technical documentation.
- Support product delivery across service and UI boundaries, including a major platform modernization across 120+ modules.
Software Engineer, Freelance
- Build client software from discovery to release, spanning service workflows, data models, and user-facing product surfaces.
- Clarify workflows with stakeholders and ship usable increments under changing requirements.
- Design admin, authentication, reporting, and operations screens with maintainable state and handoff boundaries.
Software Engineer, Docloop
- Maintained production e-invoicing workflows where data correctness, integrations, and audit behavior mattered.
- Tested integration behavior with repeatable scripts, then documented partner-facing contracts.
- Supported partner integrations with accounting software and shipped fixes for production invoicing workflows.
Featured projects
All projects
Architex: System Design Practice Platform
Built a place to practice system design with real review flow. Stack: Node.js, Express, SQLite, React, Excalidraw.
Project Aeon: Local-First Assistant Platform
Built a private local AI assistant without sending work to cloud. Stack: FastAPI, ChromaDB, Ollama, Vue.
Iris: Print-Shop Operations Web App
Built one place for print-shop work orders, people, and daily mess, with a React frontend backed by a Go API and SQLite.
Recent writing
All postsSix Claude Code setups that cut repetitive prompting
Store project rules, slash commands, MCP servers, subagents, plugins, and review steps in Claude Code so you do not repeat instructions in every session.
Keeping translated URLs when an article isn't translated
How this site separates a working language switcher from search indexing for untranslated posts.
Designing codebases for AI agents
Clear boundaries, local tests, and discoverable rules reduce the cost of every change.
What I changed in my prompts for Claude Fable 5
Long-running agents need explicit boundaries, checkpoints, and proof of completion.