I'm Oleg — a senior full-stack engineer and AI systems architect who embeds into your company and does the work of your first 3–5 hires. From React frontends to LLM orchestration pipelines. One person, no management overhead.
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You have product-market fit (or you're close), but you're stuck in the hiring loop — interviewing, onboarding, managing. Meanwhile, features aren't shipping. I skip that entire cycle. You get a senior engineer who's productive from week one, owns outcomes, and actually cares whether the thing works in production.
I embed into your team on a retainer — join your standups, own features end-to-end, ship on your cadence. You get the output of a senior hire without the recruiting, equity, or three-month ramp-up.
I take it from concept to deployed product — architecture, backend, frontend, infrastructure. You get in front of users and investors with a real product, not a prototype.
SSO, audit logs, complex integrations, compliance requirements — the hard stuff that closes six-figure contracts. I've built these at scale and know what enterprise buyers actually need before they ask.
If your product needs LLM orchestration, RAG pipelines, or agent workflows, I build those too — with structured outputs, cost control, and fault recovery. Not a standalone AI project, but AI that ships inside a real product.
B2B SaaS · AI Platform for MSPs · Sole engineer, zero to production
An AI-powered platform that tracks hardware lifecycle, firmware, and security advisories across 48+ vendors. I built every layer — multi-tenant MSP dashboards, Stripe billing across four tiers, Elasticsearch search, HubSpot CRM and CMDB integrations.
The backend runs a graph-driven LLM orchestration engine: prompt nodes wired into DAGs with cascading scope and atomic dedup to keep AI costs predictable. Next.js, FastAPI, Node.js, Firebase. Live, processing payments, serving real users.
OSINT Intelligence Platform · Defense & Government
Core engineer on a Gold Stevie Award-winning OSINT intelligence platform. Elasticsearch search and analytics across billions of entity connections, RAG pipelines, LLM-powered chat interface, and D3 visualizations for government and national security analysts. Awarded a Gold Stevie Award for Achievement in Science & Technology at the 2023 American Business Awards.
100% Job Success Score · Top 3% of platform
Perfect success rate across every engagement on Upwork. Top Rated Plus status is reserved for the top 3% of freelancers — maintained through consistently delivering results, not just completing hours.
First-class honours in Physics from the Open University, 7+ years building production systems. TypeScript, React, Next.js on the frontend. Python (FastAPI) and Node.js on the backend. PostgreSQL, Elasticsearch, and vector databases for data. AWS and GCP for infrastructure. LLM orchestration, RAG pipelines, and agent workflows in production. The full stack, from UI to AI.
Based in Ecuador, working primarily with US and international clients. I overlap comfortably with US time zones and I've been remote-first for my entire career. Async communication, clear documentation, and proactive updates are how I've always worked.
I work best on long-term engagements, not one-off tasks. When you work with me, you're not getting a ticket-taker — you're getting someone who owns the product end-to-end and thinks about what's going to matter six months from now.
Tell me what you're building. If I can help, I'll say so. If I can't, I'll tell you that too.