Java/Kotlin Engineer-Payment Gateway
Posted 1 week ago by Hydrogen Group
Negotiable
Inside
Hybrid
London, London
Summary: The role involves supporting a major payments-focused program that is expanding across various value streams, including merchant onboarding and transaction capture services. The company seeks several Senior Software Engineers with substantial experience in the payments domain to join a growing engineering team responsible for large-scale integrations and payment services.
Key Responsibilities:
- Deliver large-scale integrations and payment services.
- Contribute to architecture and stakeholder discussions.
- Work with payment gateways and processing systems.
- Engage in scalable distributed systems development.
- Develop and maintain integrations, APIs, and backend services.
Key Skills:
- Strong experience with payment gateways/payment processing systems.
- Commercial experience with Kotlin, Java, and TypeScript.
- Experience in scalable distributed systems.
- Strong understanding of integrations, APIs, and backend services.
- Previous fintech/payments experience is highly desirable.
Salary (Rate): undetermined
City: London
Country: United Kingdom
Working Arrangements: hybrid
IR35 Status: inside IR35
Seniority Level: Senior
Industry: IT
We’re supporting a major payments focused programme that is rapidly scaling across multiple value streams including merchant onboarding, point of sale, and transaction capture services.
We’re looking for several Senior Software Engineers with strong payments domain experience to join a growing engineering team delivering large-scale integrations and payment services.
Key Requirements
Strong experience working with payment gateways/payment processing systems
Commercial experience with:
- Kotlin
- Java
- TypeScript
- Experience working within scalable distributed systems
- Strong understanding of integrations, APIs, and backend services
- Comfortable contributing to architecture and stakeholder discussions
- Previous fintech/payments experience highly desirable
Ideal Background
Experience with any of the following would be highly beneficial:
- Payment gateways
- Merchant onboarding
- Point of Sale (POS)
- Transaction capture
- PSP integrations
- Payment orchestration
- PCI / secure payment environments
Additional Details
- London based role
- Hybrid working (2–3 days onsite)
- Inside IR35
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