Principal Software Engineer · CTO & Co-founder of JsDaddy · ⚡ Top Rated Plus on Upwork
I build AI-powered production systems for founders and CTOs who need infrastructure that ships — not experiments that stall.
Most clients come to me second — after the prototype failed, after the offshore agency disappeared, when the stakes are too high to get it wrong again.
In 12+ years across fintech, legal tech, logistics, healthcare SaaS, and e-commerce, I've shipped systems handling 5K+ concurrent users and 1M+ API calls/month. No half-working demos. No disappearing after handoff.
I work like a technical co-founder: I understand your business problem as clearly as the technical one.
| Project | Result |
|---|---|
| 🔁 Replaced 12-person manual workflow with n8n + GPT-4 | 10K+ records/day · 99.2% accuracy · $380K/yr saved |
| 💳 Flutter + Node.js fintech SaaS | $2M+/month processed · 3 years · same client |
| ⚖️ React + LangChain legal research tool | 73% reduction in attorney document review time |
| 🚀 Next.js + Supabase multi-tenant SaaS | $0 → $45K MRR in 5 months |
| 📱 Cross-platform Flutter app | 50K+ active users across iOS, Android & Desktop |
| 🤖 OCR + GPT-4 + LangChain logistics pipeline | 8× throughput — same team headcount |
| ⚡ LLM underwriting pipeline (Series-A fintech) | 4.2s → 280ms latency · $18K/mo infra saved |
📦 ngx-mask open-source library |
2M+ monthly npm downloads · 1,000+ ⭐ GitHub stars |
🤖 AI Integration & LLM Deployment GPT-4 / Claude / Gemini API, RAG pipelines, LangChain & LangGraph agents, semantic search with pgvector & Pinecone. Production-ready — not experimental.
⚙️ AI Automation Workflows n8n & Make pipelines replacing entire manual operations. 10,000+ records/day at 99%+ accuracy.
🌐 Multi-Tenant SaaS Platforms Next.js + Supabase or Node.js + PostgreSQL — Stripe billing, RBAC, real-time features, CI/CD. Live in 2–4 weeks.
📱 Cross-Platform Mobile Apps Flutter developer shipping iOS, Android, and Desktop from one codebase. Fintech, enterprise, real-time, biometric auth.
🏗️ Backend Systems & APIs Node.js, NestJS, FastAPI, PostgreSQL — event-driven, compliance-ready architecture for fintech and legal tech.
Frontend
Mobile
Backend & Cloud
Databases & Messaging
ngx-mask — Angular input masking library with 2M+ monthly npm downloads · 1,000+ ⭐ GitHub stars · Used globally in fintech, healthcare, logistics, and enterprise SaaS.
✅ Reactive & Template-driven Forms · ⚙️ Dynamic masking engine · 🚀 SSR + AOT compatible · 🌍 Zero-config defaults
🤝 Looking for contributors → ngx-mask
"Igor embedded seamlessly into our on-prem team... highly competent, executed his stories efficiently and to spec, while effectively articulating tradeoffs. His positive attitude is contagious." — Imran Y., Technical Product Owner · Enterprise Software · Verified Upwork Review
"He consistently delivers high-quality work, pays attention to details, and takes full ownership. His problem-solving skills and positive attitude make him a valuable contributor to any team." — Sergii S., Product Development Manager · Verified Upwork Review
Clients include: YC-backed FinTech · Series-A HealthTech · $12M ARR SaaS · LegalTech AI · ClimateTech B2B · Retail Ops
| Offering | Timeline | Starting From |
|---|---|---|
| 🔬 AI SaaS PoC — validated & delivered | 72 hours | $500 |
| ⚙️ n8n + LLM Automation System | 2–4 weeks | $1,500 |
| 🌐 Next.js + Supabase SaaS Web App | 2–4 weeks | $2,500 |
| 📱 Flutter SaaS App — iOS, Android, Desktop | 2–4 weeks | $2,500 |
| 🧭 Architecture Consultation | 60 min | Fixed fee |
