React and TypeScript product engineering
Senior frontend engineer
DmitriiLobanov
I build React and TypeScript products for complex workflows, with measured improvements to performance, reliability, and delivery.
React · TypeScript · Next.js / Fintech & SaaS
The person
behind the system
event offer.updated
state consistent
context illustrative
state consistent
context illustrative
Measured impact
Production outcomes / selectedUsers served by the Tinkoff fintech platform
Production loading time across critical pages
Production interaction latency: 500ms → 150ms
Product engineer
What people use
- Complex workflows
- Interaction systems
- Performance
- Accessible interfaces
Product signalsSystem coreReliable by design
State
Events
Data
Frontend architecture
What keeps it reliable
- Domain boundaries
- Server state
- Real-time events
- Long-lived architecture
01 / Tinkoff · Fintech platform
Engineering for 300,000+ users
I built and evolved partner and internal operations frontends, connecting onboarding, analytics, documents, permissions, and real-time workflows. Production p75 LCP improved from 6s to 2s.
Explore the case study02 / Independent product · Reliable Kanban
Immediate feedback. Recoverable moves.
Drag-and-drop updates immediately. Failed moves roll back, stale writes are rejected, and unrelated tasks stay available while a move is pending.
Open the project03 / Edge Case Inc.
When the system breaks character
Production incidents become visual stories: symptoms escape the interface, travel through the system, and reveal the real cause.
Follow the investigationsLive event topologySystem observing
Offer UIevent emitted
Event gatewaydelivery check
Server stateaccepted once
Idempotency guardduplicate absorbed
Resolved · one state transition
04 / Thinking in public
The reasoning is part of the work
05 / Start a conversation
Building a product whose complexity is starting to show?
I’m open to remote Senior Frontend Engineer roles through international B2B contracts. Based in Ecuador · UTC−5 · English C1.
Conversation channel Available
- Signal
- Product · architecture · frontend
- Next step
- A focused first conversation