Hi, I'm Konstantin Tarkus
Principal Software Engineer & OSS Architect
I build AI-first systems and the boring-but-critical plumbing that keeps them alive.
⚡ The TL;DR
I specialize in AI Infrastructure, Developer Experience (DX), and 0-to-1 Architecture. I design systems that don't wake you up at 2am—resilient queues, clean API gateways, and observability that actually works.
Based in Porto San Giorgio, Italy (CET). Working remotely with US/UK teams since 2014. My mornings are your "while you were sleeping" deep work blocks.
📦 Open Source & Architecture
I don't just use tools; I build the "paved roads" for other engineers.
| Project | Role | Impact |
|---|---|---|
| React Starter Kit | Creator | 23k+ Stars. The standard-bearer for React boilerplates. Reduced setup time by ~70% for thousands of startups. |
| WS-Kit | Author | Type-safe WebSocket RPC framework. Ships real-time features faster and safer than hand-rolled sockets. |
| SyncGuard | Author | Local-first synchronization for multi-client apps. Solves conflict logic so you don't have to. |
🛠 What I Do
I help founders and engineering leaders untangle complexity and ship faster.
-
SOLVE — AI-first MVPs & Distributed Systems Design and ship RAG/agent pipelines with proper guardrails. I untangle legacy APIs and data models so your team can stop tiptoeing around them.
-
OWN — End-to-End Delivery Scope → Architecture → Implementation → Infra. I build API platforms and data contracts teams can ship against, favoring simple, proven patterns over hype.
-
DE-RISK — Make it Maintainable Align early, document decisions (ADRs/RFCs), and bake in CI/CD and telemetry. I leave behind clean handoffs that your team can maintain after I leave.
🚀 The "First 90 Days" Package
What founders get when they hire me as a Fractional Principal / Lead:
- Clarity: A clear problem brief, risk list, and prioritized backlog we align on immediately.
- Architecture: A concise design doc and a realistic delivery plan.
- Production MVP: A functional, observable system live in 4–8 weeks.
- Handoff: CI/CD pipelines, preview envs, and ADRs so your team can take the reins.
🏗 Tech Stack
Core: TypeScript Node.js Bun PostgreSQL Redis
Cloud & Infra: GCP Cloudflare Workers Terraform Docker GitHub Actions
AI & Data: Vertex AI Gemini Claude LangChain RAG Pipelines
Frontend: React Next.js Vite Tailwind TanStack
💬 Testimonials
"Konstantin is the steady technical hand every early-stage team hopes to find... avoids mountains of technical debt while keeping the team moving fast." — Azad A., Head of Product
"His specialty is infrastructure and architectural design... always up to date on bleeding-edge tech." — Kavin P., Founder & COO