Senior Full Stack Engineer
New
L
LI.FIFintech Web3
Please note: This role is remote within the EMEA region.Full-TimeSenior
Salary90,000 - 130,000 EUR per year
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Job Details
- Languages
- English
- Required Skills
- DockerNode.jsKubernetesMongoDBTypeScriptRedisReact
Requirements
- Strong backend engineering experience with expert proficiency in TypeScript/Node.js
- Full-stack ability to work across API contracts and UI states using React and TypeScript
- Proven experience integrating external APIs with provider-specific edge cases
- Good instincts around async flows, failures, observability, and recovery
- Working-level Web3 knowledge: you understand transactions, block explorers, and how products like bridges and DEX aggregators fit together
- Strong product judgement and the ability to navigate multiple teams and codebases without hand-holding
- Excellent communication skills in English
Responsibilities
- Own Checkout-specific backend capabilities that power funding flows end to end, including provider integrations, quotes, sessions, statuses, deposit addresses, and recovery
- Design and build integration patterns for external providers (onramp, exchange, payment), normalising provider-specific behaviour into a consistent Checkout experience
- Define and maintain the backend contracts between Checkout UI, provider systems, and LI.FI's execution infrastructure, including robust state handling across long-running and failure-prone flows
- Drive cross-functional technical discovery when Checkout depends on Core backend, Partner Portal, or other adjacent teams, ensuring architectural alignment without drift
- Implement frontend work where useful, particularly when UI states and backend contracts need to be designed together
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