Integration Engineer

About the Role We're looking for an Integration Specialist to own the technical onboarding and ongoing support of B2B partners integrating with Wirex Pay's Banking- as -a-Service platform . You'll be the bridge between our partners and our technology , ensuring smooth integrations across both our API infrastructure and on-chain (EVM) components . About Us Wirex has sat at the intersection of crypto and traditional finance since 2014. Millions of cards issued, billions in transactions processed, and one of the most regulated, stablecoin-friendly platforms in the industry. Wirex BaaS is our Banking as a Service arm, giving fintechs, neobanks and crypto-native companies everything they need to launch financial products: card programmes, multi-currency accounts, FX, stablecoin settlement and the compliance layer that makes it all work. What You'll Own End-to-end technical onboarding of new partners, from initial integration kickoff to production go-live. Ongoing technical support for partners throughout their lifecycle with Wirex Pay. Partner system integration with Wirex Pay BaaS: API endpoints, smart wallet provisioning, wrapped stablecoin flows (WUSD/WEUR), and card infrastructure. Guidance on optimal integration patterns to help partners scale efficiently and securely . Participation in pre-sales and technical discovery calls, explaining integration options and platform capabilities. Support for L1 Support team on technical and integration-related escalations. Key Responsibilities Lead the full integration process for new B2B partners , ensuring smooth onboarding and timely launches across both API and on-chain touchpoints. Act as the primary technical point of contact for partners , supporting them with API documentation , smart wallet integrations, and blockchain-specific queries. Conduct UAT and certification checks to v alidate transaction flows , wallet operations , and compliance requirements. Identify , troubleshoot , and resolve technical issues during integration , including debugging API calls , webhook failures, and on-chain transaction Maintain , update , and continuously improve integration guides , API documentation , and technical runbooks . Work closely with engineering , product , and commercial teams to align technical delivery with business objectives. Requirements 3+ years of experience in a technical support , technical account management , or integrations-focused role . Strong understanding of REST APIs , JSON, and webhooks . Hands-on experience with API testing tools ( Postman / Insomnia or similar ). Familiarity with blockchain concepts : wallets , transactions , EVM basics , and token standards (ERC-20) . Experience with blockchain analysis via explorers . Understanding of account abstraction , smart wallets /MPC wallet infrastructure . Experience with stablecoins , payment rails , or fintech / crypto products background . Experience using log management tools to investigate and debug issues . Ability to explain complex technical concepts clearly to both technical and non-technical stakeholders . Strong written and verbal communication skills in English ( Upper-Intermediate or higher ). Ownership mindset : you care about results and long-term partner success . Ability to work independently , prioritize effectively , and stay focused on outcomes . Nice to Have Basic to intermediate SQL querying skills . Basic knowledge of Python/TypeScript/Go programming language. Knowledge of KYC/AML compliance flows in a crypto context. Hands-on experience running technical demos . What We Offer Premium tariffs for Wirex product. Semi-remote work with flexible hours—work from home or office. Home office allowance. Virtual share options scheme after the probation period. Health insurance coverage after the probationary period. Generous vacation policy: 20 business days of paid leave . Paid sick leave , Birthday , and Anniversary leave . Length of Service Holidays . Engaging in online events for learning and enjoyment . PE accounting and support .