Blockchain Systems Engineer — Cross‑Chain & Scale

MoonPay; Barcelona; Hybrid; EUR 90,000 - 170,000; Full time

Benefits offered by this job

Competitive salary package

Equity package

Unlimited holidays

Hybrid working schedule

Private healthcare benefits

Annual training budget

Home office setup allowance

Employee referral programme

Regular remote company offsites

Job summary

A pioneering fintech company is seeking backend engineers to design and improve transaction infrastructures. This role involves building scalable blockchain applications, managing transaction lifecycles, and ensuring system resilience. Ideal candidates will have strong fundamentals in backend engineering and experience with production systems and blockchain networks. The company values diversity and encourages applications from individuals with different backgrounds.

Qualifications

• Hands-on experience interacting with live blockchain networks in production.
• You think in failure modes, not just happy paths.
• Experience with high-throughput or financial systems.

Responsibilities

• Design and improve high-volume transaction pipelines.
• Manage transaction lifecycle including retries.
• Build infrastructure supporting cross-chain flows.

Skills

Strong backend/platform engineering fundamentals

Experience operating production systems

Clear understanding of transaction lifecycle

Experience with wallet infrastructure

Awareness of MEV and pricing impact

Job description

A pioneering fintech company is seeking backend engineers to design and improve transaction infrastructures. This role involves building scalable blockchain applications, managing transaction lifecycles, and ensuring system resilience. Ideal candidates will have strong fundamentals in backend engineering and experience with production systems and blockchain networks. The company values diversity and encourages applications from individuals with different backgrounds.