Software Engineer (Prop Trading Firm)

Radley James; Greater London; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

Radley James seeks a DeFi Developer in Greater London to join a technical trading team. This role involves building high-performance systems in Rust and Python for decentralized markets, with a strong focus on end-to-end ownership across the trading stack. The ideal candidate will have a software engineering background with 3–7 years of experience, particularly in crypto or DeFi contexts. The position also welcomes remote candidates from Europe.

Qualifications

• 3–7 years of solid software engineering experience.
• Strong production experience with Rust and Python.
• Deep understanding of the current DeFi landscape.

Responsibilities

• Build high-performance systems for decentralized markets.
• Focus on production systems covering execution and on-chain integrations.
• Manage and maintain systems on cloud infrastructure.

Skills

Production experience with Rust

Hands-on experience with smart contracts and Solidity

Experience in crypto or DeFi-native roles

Understanding of decentralized exchanges

Building and maintaining public APIs

Understanding of trading concepts

Cloud infrastructure management

Job description

Top global trading firm looking for a DeFi developer to join a small, highly technical trading team building high-performance systems that operate directly on decentralized markets.

The role is hands‑on and focused on building production systems in Rust and Python, covering execution, on‑chain integrations, and performance‑critical components where latency and reliability are key. There is strong end‑to‑end ownership and clear visibility across the full trading stack.

They are looking for someone with a solid software engineering background and several years of experience (typically around 3–7). Experience with trading systems or DeFi is beneficial but not required.

What they’re looking for:

• Strong production experience with Rust and Python
• Hands‑on experience with smart contracts and Solidity at an application level
• 3–4+ years in crypto or DeFi‑native roles
• Deep understanding of decentralized exchanges and the current DeFi landscape
• Experience building and maintaining public APIs
• Understanding of trading concepts, either practical or theoretical
• Ability to run and maintain systems on cloud infrastructure
• Based in London or working remotely from anywhere in Europe

Nice to have:

• Experience designing, writing, and deploying smart contracts
• On‑chain trading or strategy development experience
• Familiarity with ecosystems such as Solana, Sui, or Cosmos
• Experience diagnosing performance, latency, or throughput issues
• Interest in product design and user experience alongside engineering