Onlano
BlockchainOnsite

Senior Card Developer

Gnosis - Company

Kreuzberg, Berlin, ๐Ÿ‡ฉ๐Ÿ‡ช GermanyFull-time - Senior (4-7 years)0 applicantsCloses Jun 14, 2026

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Job description

Role overview

Gnosis Pay is building infrastructure for stablecoin-powered payment cards and custom payment flows. The ideal candidate will develop and maintain the technical architecture that connects on-chain wallets to real-world spending via Visa debit cards. This role requires expertise in blockchain integration, API development, and secure smart-wallet systems.

The position involves collaborating with fintech partners to simplify card issuance and payment flows. Candidates should have strong problem-solving skills and experience with decentralized systems.

Responsibilities

  • Design and implement payment card infrastructure APIs
  • Integrate blockchain wallets with traditional payment systems
  • Collaborate with fintech partners on custom payment solutions
  • Maintain secure smart-wallet transaction execution systems

Requirements

  • 4+ years in blockchain or fintech development
  • Expertise in API design and RESTful services
  • Strong understanding of smart contract security
  • Experience with payment processing systems

Benefits

  • Work on cutting-edge blockchain payment technology
  • Remote-friendly work arrangement with Berlin-based team

Keywords

blockchainapi-developmentsmart-contractsvisadebitstablecoinsfintechsecure-wallets