Simon Pukhov SemyenPukhov

I build product systems end to end: the interface people use, the APIs and background jobs behind it, and the operational details that keep it fast and affordable. Led a ~6-person cross-functional team; launched startup products that reached production, real users, and revenue. AI-native workflow: I ship daily with Claude Code and agent pipelines, and build LLM features as an engineer — cost tracking, retries, and provider abstraction included.

🛠 Stack

🚀 Featured builds

	Project	What it demonstrates
💬	RelayDesk	Realtime support inbox — WebSocket gateway, optimistic sends with idempotent retries, presence, RBAC, audit trail
🤖	FlowPilot	LLM workflow engine — provider abstraction, retries with jittered backoff, token accounting, per-run cost budgets
📊	CostLens	Cloud-cost intelligence dashboard — typed domain logic, anomaly detection, Docker, tests, polished responsive UI
🎬	StreamForge · in progress	Media pipeline — processing jobs, CDN-aware delivery, performance instrumentation

Portfolio projects are independent demos with fictional data — they show how I work without exposing NDA-protected products or customers.

_{RelayDesk — realtime inbox with presence, optimistic sends, and audit trail}

_{FlowPilot — LLM pipelines with cost budgets and per-step token accounting}

📈 Measurable engineering impact

~1.5×

_{AWS cost reduction
(regions, Lambda, CloudFront)}

-$3,000/mo

_{Twitter/X API
cost reduction}

4s → 1.5s

_{video player
initial load}

~$600

_{LLM token-spend
reduction*}

_{*period unspecified}

🧩 Engineering notes & snippets

Area	Snippets
⚛️ React	Debounced async search without race conditions · Optimistic mutation hook with rollback
🟢 Node.js	Bounded-concurrency promise pool · Graceful shutdown with cleanup timeout
🔷 TypeScript	Retry with capped backoff + jitter · Fail-fast env validation with Zod · Typed event bus
🐍 Python	LLM spend guard with budget ceiling · FastAPI request-id middleware
☁️ Infra	Atomic Redis sliding-window rate limiter · AWS Lambda cost review checklist · Next.js cache boundary with auth

📊 GitHub

📫 Contact

Open to Senior Full-Stack Engineer roles — Europe · US · Cyprus · remote-first teams.

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