Integration Engineer

Posted 14 Days Ago
Be an Early Applicant
Hiring Remotely in London, GBR
In-Office or Remote
Mid level
Mobile • Cryptocurrency • Web3
The Role
Manage end-to-end technical onboarding and ongoing integration support for B2B partners integrating with Wirex Pay BaaS. Own API and on-chain integration touchpoints, conduct UAT/certification, troubleshoot API/webhook and on-chain issues, maintain documentation and runbooks, and act as primary technical contact during pre-sales and lifecycle support.
Summary Generated by Built In

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 platformYou'll be the bridge between our partners and our technologyensuring 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 partnersensuring smooth onboarding and timely launches
    across both API and on-chain touchpoints.   
  • Act as the primary technical point of contact for partnerssupporting them with API documentation, smart wallet integrations, and blockchain-specific queries.   
  • Conduct UAT and certification checks to validate transaction flowswallet operationsand compliance
    requirements.   
  • Identifytroubleshootand resolve technical issues during integrationincluding debugging API calls, webhook failures, and on-chain transaction   
  • Maintainupdateand continuously improve integration guides, API documentationand technical runbooks 
  • Work closely with engineeringproductand commercial teams to align technical delivery with business
    objectives.  

 

Requirements   

  • 3+ years of experience in technical supporttechnical account managementor 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 conceptswalletstransactions, EVM basicsand token standards (ERC-20).   
  • Experience with blockchain analysis via explorers.   
  • Understanding of account abstractionsmart wallets/MPC wallet infrastructure.   
  • Experience with stablecoinspayment railsor 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 mindsetyou care about results and long-term partner success.   
  • Ability to work independentlyprioritize effectivelyand 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 leaveBirthdayand Anniversary leave 
  • Length of Service Holidays 
  • Engaging in online events for learning and enjoyment 
  • PE accounting and support. 

Skills Required

  • 3+ years in 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, 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
  • Experience using log management tools to investigate and debug issues
  • Ability to explain complex technical concepts clearly to technical and non-technical stakeholders
  • Strong written and verbal communication skills in English (Upper-Intermediate or higher)
  • Ownership mindset and ability to work independently, prioritize effectively, and stay focused on outcomes
  • 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
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The Company
HQ: London
225 Employees
Year Founded: 2014

What We Do

Wirex is a digital payment platform with a mission - to make crypto and traditional currencies equal and accessible to everyone. We’re making fintech simple. Our innovative mobile app and next-gen Wirex card lets you buy, store, exchange and spend a wide variety of conventional and digital currencies quickly and securely, with no hidden fees and zero fuss. Download the app now and discover a world where every purchase earns you Cryptoback™ rewards - and using your cryptocurrency in real life is as easy as tapping your Wirex card. *Content on the page not intended for UK customers!

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