Senior Fullstack Developer (Go + React) / Blockchain Engineer - Trading Infrastructure

Wanted Senior Fullstack Developer (Go + React) / Blockchain Engineer - Trading Infrastructure

About the project ▫️10arx — AI-native trading terminal for prediction markets ▫️Website: ▫️On-chain execution, integration with Polymarket, Kalshi, DEX ▫️Early stage, fast pace, small team

Role You will be building the 10arx trading infrastructure. A system that runs 24/7, trades real money, and cannot afford to silently break. On-chain execution, integrations with prediction market platforms, real-time data, strategy automation. We are looking for an engineer who has already built systems that handle real money.

▫️Design and build the on-chain execution system: transactions, contracts, wallet management, gas optimization ▫️Integrate with prediction market platforms and DEX ▫️Build a real-time data pipeline: collecting, normalizing, and processing market data ▫️Implement trading strategies in code ▫️Develop backtesting infrastructure to test strategies on historical data ▫️Build monitoring and alerting ▫️Write frontend in React for management, monitoring, and visualization

▫️Backend: Go (primary language) ▫️Blockchain: Solidity, EVM, web3 (ethers.js / go-ethereum) ▫️Frontend: React, TypeScript, TanStack ▫️Data: PostgreSQL, Redis, Elasticsearch ▫️Infra: Docker, CI/CD ▫️AI: Cursor / Copilot / Claude — daily

▪️Requirements: ▫️Experience and Stack:

• 4+ years of Go in production — this is your primary language
• Real-world blockchain experience
• Solidity — you know how to read and interact with contracts
• Real-time systems: WebSocket, streaming data, event-driven architecture
• Fullstack: React + TypeScript — at a level to independently develop UI
• Experience with exchange APIs (CEX or DEX)
• Python as a supplementary language (scripts, backtests, data processing)

▫️Domain:

• Experience in fintech, crypto, DeFi, trading, prediction markets, or related domains (payments, betting, exchange infrastructure) — mandatory
• You have already built systems where an error = loss of money. You can describe what you built, how it worked in production, and what broke ▫️AI: actively use LLM tools in development ▫️Language: Russian — mandatory + working English (documentation, APIs) ▫️How you work

This is not a "backend developer in a crypto startup." This job is at the intersection of three things:

• Systems engineering — building a system that trades real money 24/7
• Blockchain engineering — on-chain execution, gas, mempool, contracts
• Speed — short iterations, results in days, not weeks. AI tools in daily work

▫️Personality:

• You don't wait for tasks. You see a problem → you fix it → then you report
• You are comfortable when there is no ready-made specification
• You have built from scratch — launched a service from an empty repository
• You are used to being the sole engineer for a direction

▪️You won't fit if ▫️You haven't written Go in production — you want to "try it out" on our project ▫️You have only worked in large companies ▫️You are used to receiving detailed specifications ▫️Your experience is only in smart contracts ▫️You have never worked with financial data, exchanges, or trading ▫️You do not use AI tools in development

▫️Full ownership of the trading infrastructure direction ▫️Direct interaction with the CTO and founder ▫️Remote, contractor ▫️Competitive salary