alaricwang
Solidity & Evm Backend Engineer
EVM/Solidity engineer with Java/Spring crypto-trading backend experience.
I build smart contracts (Foundry), Web3 backends (Node/Java), and wallet-connected frontends (React/Next.js).
Recent work:
• PrediX — prediction-market stack on testnet (contracts + matching/backend + UI)
• GitHub: https://github.com/predix-sea
• Sepolia: https://sepolia.etherscan.io/address/0xf14aa9339812a94f058da0ed972d68479651a11d
Looking for: remote Solidity / Web3 full-stack / backend roles (contract or full-time). Available to start immediately.
Experience: 3 years
Yearly salary: $100,000
Hourly rate: $70
Residency: 🇨🇳 China
Experience
Java Backend Developer
LTP — Crypto Trading (OMS Team) 2024 - 2026
Owned engine-to-exchange order pipeline targeting zero order loss and sub-second submission latency under live crypto trading load; supported ~20 months of continuous production OMS operation. Implemented maker-fee routing vs taker fills — aligned execution with exchange liquidity incentives to lower fee costs for institutional flow vs higher-cost taker execution. Designed ops REST/admin APIs for funding fees, maker/taker config, and bilateral order query/modification — cut manual ops intervention on fee and order exceptions; self-service workflows for routine ops changes. Stack: Spring Boot, PostgreSQL, Redis, MQ; idempotency + state reconciliation — improved pipeline stability for 24/7 trading operations over ~20 months of production tenure.
Skills
backend
blockchain-engineer
java
node
react
solidity
english
chinese-mandarin