Senior Payments Engineer - 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

Our client is a global fintech scaling its payments engineering squad. You’ll join on contract and ship alongside their engineers day to day.

About the Role

Build and improve card payment systems across issuing and/or acquiring, from authorisation through clearing, settlement and disputes. Work on PSP and gateway integrations, digital wallets including Apple Pay, and secure card tokenisation.

Skills & Experience

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…

Full requirements and application details are available at the original source.

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