Senior Full Stack Engineer (Checkout)

New
Location flexibility across the EMEA regionFull-TimeSenior
Salary not disclosed
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Job Details

Required Skills
AWSDockerNode.jsBlockchainKubernetesMongoDBTypeScriptRedisReact

Requirements

  • Strong professional experience in backend engineering using Node.js and TypeScript, combined with full-stack capabilities using React and TypeScript.
  • Proven expertise integrating external APIs and managing provider-specific edge cases in complex asynchronous systems.
  • Solid understanding of distributed systems, observability, recovery flows, and resilient backend architecture.
  • Working knowledge of Web3 technologies, including blockchain transactions, wallets, DEX aggregators, and related ecosystem concepts.
  • Experience with modern development environments and infrastructure tools such as Docker, Kubernetes, AWS, MongoDB, Redis, and GitOps workflows.
  • Familiarity with frontend libraries and frameworks such as React, viem, wagmi, or similar technologies is a plus.
  • Strong communication and collaboration skills, with the ability to work independently across multiple teams and codebases.
  • Comfortable operating in fast-paced, high-growth, and highly iterative product environments.
  • Passion for crypto, fintech, payments, or decentralized technologies is highly valued.

Responsibilities

  • Design, build, and maintain backend systems powering checkout and transaction flows, including sessions, quotes, provider integrations, status handling, and recovery processes.
  • Develop scalable integration patterns for external providers such as payment services, exchanges, and on-ramp platforms while ensuring a consistent user experience.
  • Define and maintain reliable backend contracts between frontend interfaces, provider systems, and execution infrastructure.
  • Build and improve long-running transaction workflows with strong attention to observability, resilience, failure handling, and recovery mechanisms.
  • Contribute to frontend development when required, particularly around UI states tightly coupled with backend workflows and APIs.
  • Collaborate with cross-functional engineering teams to ensure architectural consistency and seamless integration across products and services.
  • Participate in technical discovery, system design discussions, and roadmap planning for future checkout and payment-related capabilities.
  • Continuously improve performance, maintainability, and scalability across distributed services and user-facing components.
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