Aleksei I.

Senior Software Engineer with 10+ years delivering full-stack products — from high-traffic user interfaces to backend services. For the last six years I was embedded as a long-term contractor in Upwork's own Trust & Safety team, owning compliance and enforcement features used by tens of millions of users. I held PagerDuty on-call responsibility for my domains and shipped features end-to-end, independently across both frontend and backend layers. I build across Vue, React, Angular, TypeScript, Node.js, Java, and Python. Lately I've been going deep on Applied AI: LLM integrations, autonomous agent systems with LangGraph, and AI-accelerated engineering workflows using Cursor with MCP tooling. What I bring to a project: → End-to-end ownership — I've built and shipped features solo across both frontend and backend, from design review through production release. → Scale — Upwork runs at tens of millions of users. I know what production-grade code looks like. → AI-augmented delivery — I use Claude Code and Cursor with MCP integrations to ship faster without cutting corners. At Upwork I delivered a migration project in two weeks that was originally scoped for significantly longer. → Reliability — six years as a trusted long-term contractor on a single high-stakes team speaks for itself. Stack: Frontend: Vue 3, Nuxt, React, Redux, Angular, TypeScript, RxJS Backend: Node.js, Nest.js, Java, Python, Go APIs: GraphQL, gRPC, REST Data: PostgreSQL, MongoDB AI tooling: LangGraph, MCP integrations, Claude API, Cursor I work remotely on contract. If you're building something serious and need an engineer who can own it end-to-end — let's talk.