DeFi Developer | London

CompanyAAA Global

LocationLondon Area, United Kingdom

Posted At1/19/2026

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Occupation Type

Textile process operatives

Occupation Code Skill LevelIneligible

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Description

DeFi Developer — High-Performance Crypto Trading Systems (London)

Our client is hiring a sharp, ambitious DeFi Developer to join their DeFi trading team building high-performance systems that operate directly on decentralized markets.

You’ll work hands-on across the full trading stack — from on-chain integrations and execution logic, to infrastructure, monitoring, and performance optimization.

What you’ll do

Build and ship production-grade code (primarily Rust + Python)
Develop systems that interact with on-chain protocols and infrastructure
(Solidity, JSON-RPC, Solana, MEV workflows, etc.)
Improve real-time monitoring, execution pipelines, and strategy tooling
Debug and optimize end-to-end performance: latency, reliability, throughput
Work with protocol teams and external projects to unlock new market opportunities
Grow into end-to-end ownership across DeFi integrations and trading infrastructure

Why this role is unique

Full systems exposure — infrastructure, execution, strategy logic, on-chain interaction
DeFi at the core — learn how protocols work under the hood and how on-chain dynamics create edge
Elite teammates — small, world-class group of engineers, quants, and traders
Startup velocity — fast decisions, frequent shipping, immediate production impact

This is an ideal role for someone who sees themselves as a top technologist and wants to work in one of the most cutting-edge environments in finance and crypto.

What we’re looking for

We’re looking for driven developers who want to learn fast by working on hard, meaningful problems.

You should have:

3–7 years of professional software engineering experience
Strong fundamentals and ability to write clean, testable, efficient code
Solid CS foundation: algorithms, data structures, concurrency, networking, etc.
Strong ownership mindset and clear communication

Signals of technical excellence (any of these helps):

Top academic performance in CS / math / physics / engineering
Competitive programming / olympiad success (ICPC, IMO, IOI, IPhO, etc.)
Experience at a highly selective tech company, trading firm, or fund

Language & technical background

Rust preferred, but you should be strong in at least one systems/statically typed language:
C++ / Java / Go / C# / Kotlin / similar

Nice to have

Strong preference

Understanding of trading systems, market structure, or strategy implementation

Bonus

DeFi familiarity: smart contracts, blockchain APIs, MEV, Solana
Rust experience
Infrastructure/observability tools (AWS, Grafana, etc.)
Strong math/stats background (modeling, simulation)

Team culture

Our client values:

High ownership and initiative
Curiosity, intellectual honesty, and rapid learning
Clear, direct communication
No ego, no politics — just building and improving together