Contract Senior Payments Engineer: Card Systems (Java/Kotlin)

Remote Freelance; Auckland; Hybrid; NZD 110,000 - 165,000; Full time

Job summary

Remote Freelance is seeking a fintech payments engineer to join a global team on a contract basis in Auckland, NZ. You will build and improve card payment systems across issuing and acquiring, managing authorisation through settlement and disputes, and integrating PSPs, gateways, and digital wallets.

Strong focus on Java or Kotlin with Spring Boot, Kafka, and event-driven architectures. Experience with tokenisation, HSMs, and cryptography is highly preferred.

Qualifications

• Hands-on card issuing or acquiring engineering (essential).
• Full card chain knowledge: issuers, acquirers, processors, networks.
• Expert Java or Kotlin with Spring Boot.
• Kafka, microservices and event-driven architecture.
• Tokenisation, HSMs and cryptography.

Skills

Card issuing

Card acquiring

Java

Kotlin

Spring Boot

Kafka

Microservices

Event-driven

Tokenisation

Cryptography

HSMs

Tools

Spring Boot

Job description

Remote Freelance is seeking a fintech payments engineer to join a global team on a contract basis in Auckland, NZ. You will build and improve card payment systems across issuing and acquiring, managing authorisation through settlement and disputes, and integrating PSPs, gateways, and digital wallets.

Strong focus on Java or Kotlin with Spring Boot, Kafka, and event-driven architectures. Experience with tokenisation, HSMs, and cryptography is highly preferred.