Senior Multi-Chain Backend Engineer

United States Digital Space LLC; Greater London; On-site; GBP 110,000 - 165,000; Full time

Benefits offered by this job

Equity

Competitive compensation

Job summary

United States Digital Space LLC is seeking an experienced Backend/Full Stack Engineer to design and build scalable services for high‑volume, multi‑chain on‑chain transactions. You will own backend components and APIs from architecture to production, lead DeFi protocol integrations, and explore cutting-edge blockchain tech.

The role requires 7+ years in backend engineering, strong Node.js/TypeScript skills, and deep Web3 knowledge across EVM and non‑EVM networks.

Qualifications

• 7+ years of experience as a Backend or Full Stack Engineer.
• Bachelor of Science (B.Sc.) or equivalent degree/experience.
• Blockchain and Web3 experience required with deep understanding of on-chain data and lifecycles.
• Experience across multiple ecosystems: EVM and non-EVM.
• Proficiency in Node.js and TypeScript.
• Experience designing and operating microservices in production CI/CD environments.
• Strong security knowledge and cryptography in blockchain contexts.
• Familiarity with DeFi protocols and on-chain routing is a plus.
• Experience with Web3 tooling (ethers.js, viem, web3.js).
• Full stack experience (React) is a plus.

Responsibilities

• Design and build robust, scalable backend services supporting high-volume on-chain transaction flows across multiple blockchain networks — both EVM and non-EVM.
• Own end-to-end development of backend components and APIs — from architecture decisions to production deployment.
• Lead integrations with DeFi protocols, on-chain data sources, and blockchain nodes across diverse chains and ecosystems.
• Research and evaluate emerging blockchain technologies, protocols, and standards to keep the company at the cutting edge.
• Optimize existing production systems for performance, reliability, and security — reducing latency and increasing throughput.
• Collaborate with product, protocol research, and platform engineering teams to deliver high-quality solutions on time.
• Drive features from inception through to delivery at scale, taking full ownership of the product lifecycle.

Skills

Backend engineering

Blockchain/Web3

System design

Security best practices

Cross-chain experience

Team collaboration

Lifecycle ownership

Education

B.Sc. or equivalent

Tools

Node.js

TypeScript

ethers.js

web3.js

Solana web3.js

Job description

United States Digital Space LLC is seeking an experienced Backend/Full Stack Engineer to design and build scalable services for high‑volume, multi‑chain on‑chain transactions. You will own backend components and APIs from architecture to production, lead DeFi protocol integrations, and explore cutting-edge blockchain tech.

The role requires 7+ years in backend engineering, strong Node.js/TypeScript skills, and deep Web3 knowledge across EVM and non‑EVM networks.