0xarayy
Senior Blockchain Engineer
Backend / full-stack engineer with 4+ years of professional experience. Designed the backend infrastructure for a public EVM-compatible Avalanche L1: 700,000+ on-chain transactions and 200,000+ inter-service messages per month, with 200+ active nodes at peak. Implemented ICM cross-chain messaging and real-time communication over gRPC / WebSocket. Built marketplace and auction flows for a Telegram Web3 Mini App.
Experience: 5 years
Yearly salary: $120,000
Hourly rate: $50
Nationality: 🇦🇲 Armenia
Residency: 🇦🇲 Armenia
Experience
Full-Stack Developer
Radix System 2022 - 2025
Deployed a distributed network with layered authorization: IP filtering, digital signatures, and adaptive server-side business logic. Delivered the product end-to-end: built the Node.js / NestJS and Go backend, APIs, and PostgreSQL / Redis integrations; developed the React / Next.js / TypeScript frontend. Processed and aggregated 10M+ records from multiple sources, optimized SQL queries, and reduced report preparation from hours to minutes with GPT / LangChain pipelines. Designed a marketplace and auction system for a Telegram Web3 Mini App, covering server-side calculations, event processing, and synchronous / asynchronous service communication with flows similar to order matching and wallet Send / Receive / Swap. Implemented quests, referral mechanics, and internal tokenomics for a high-load service with a large number of concurrent users.
Skills
ai
backend
blockchain-engineer
casino
cryptography
dapp
decentralize
docker
ethereumjs
evm
full-stack
gambling
hardhat
hyperledger-fabric
infrastructure
javascript
nestjs
nextjs
node
postgres
python
react-native
saas
smart-contract
solidity
sql
tokenization
typescript
web3js
zk-snark
english
russian