Open to work & collaborations

I build Web3 backend, wallet & crypto infrastructure.

Fullstack/backend blockchain integration engineer focused on multi-chain wallets, custody systems, CEX/DEX flows, transaction processing, scanners, APIs and reliable infrastructure.

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EVM · TRON · TON · BTC Multi-chain experience
Wallets & custody Core infrastructure
CEX / DEX Crypto product flows
What I can build

Backend-first Web3 systems with practical fullstack delivery.

I focus on the hard parts behind crypto products: transactions, wallets, scanners, consistency, APIs and infrastructure that keeps working after launch.

🔐

Wallet & custody infrastructure

Multi-chain wallet flows, deposits, withdrawals, balances, admin tools, roles, permissions and secure transaction handling.

⚡

Transaction systems

Reliable transaction pipelines with retries, status tracking, confirmations, idempotency and operational visibility.

🛰️

Blockchain scanners

Async scanners for blockchains, event processing, deposits detection, webhook delivery and data synchronization.

⇄

CEX / DEX integrations

Exchange-like flows, swaps, wallet connections, order/transaction tracking and crypto product backend integration.

Positioning

Backend engineer who understands the crypto product layer.

I am not only connecting smart contracts or APIs. I design the backend logic around real product needs: user balances, transaction states, blockchain confirmations, admin operations, error recovery and user-facing flows.

Problems I usually solve

✓ Teams need wallet, deposit, withdrawal or custody logic but do not want to build everything from scratch.
✓ Existing Web3 integration works in demo mode but fails under real transaction edge cases.
✓ Product needs scanners, webhooks, workers and reliable status synchronization across chains.
✓ A frontend exists, but the backend architecture, APIs, and crypto flows need production-grade implementation.
Selected work

Systems and products I can speak about from real experience.

Current project

DENeon

Wallet + GameFi system with crypto flows, multi-chain direction, product UX, backend APIs and user-facing Web3 functionality.

WalletGameFiBackend APIsWeb3 UX
Infrastructure

Multi-chain custody

Custody-oriented backend logic for wallets, balances, deposits, withdrawals, transaction status tracking and operational dashboards.

EVMTRONTONBTCSOLMoreWorkers
Automation

Scanners & transaction pipelines

Blockchain scanners and async processing services for events, confirmations, consistency and integration with product backends.

AsyncRedisWebhooksEventsMonitoring
Tech stack

Backend-heavy stack with enough frontend to ship complete flows.

Backend

  • Python / FastAPI / Flask
  • C# / .NET Core / ASP.NET Core
  • REST APIs / MVC projects
  • Workers / background jobs

Data & realtime

  • Databases
  • Redis
  • EF Core / SQLAlchemy
  • SignalR / WebSockets

Blockchain

  • EVM / Web3
  • TRON
  • TON
  • Bitcoin / UTXO flows

Frontend delivery

  • JavaScript
  • Vue.js
  • Admin dashboards
  • Wallet UX integration
Available for selected work

Building a crypto product, wallet, exchange flow or Web3 backend?

Send me a short description of your product, current stage and the backend/Web3 problem you need to solve.

emil301992@gmail.com @emilbackend LinkedIn Back to top