Backend Engineer - Payments Platform (Java/Kotlin, AWS)

United States Digital Space LLC; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

Wiser in London is seeking a backend engineer to help build a Direct Debit/API powered platform. You will design, test, and maintain backend services in Java and Kotlin using Spring Boot, deployed on AWS, serving millions of customers.

You will work on RESTful APIs, data schemas in PostgreSQL, event-driven architectures with Apache Kafka, and a payment orchestration system to optimize costs and reliability. Strong focus on security and reliability.

Qualifications

• Backend engineering experience designing and building scalable services.
• Strong understanding of RESTful APIs and security best practices.
• Experience with Java/Kotlin and Spring Boot in production environments.

Responsibilities

• Design, test, and maintain backend services in Java and Kotlin.
• Develop data schemas in PostgreSQL and event-driven components with Kafka.
• Work on a payment orchestration system focused on reliability and cost optimization.

Skills

Java

Kotlin

Spring Boot

RESTful APIs

Security

Tools

PostgreSQL

AWS

Apache Kafka

Job description

Wiser in London is seeking a backend engineer to help build the Direct Debit/API powered platform. You will design, test, and maintain backend services in Java and Kotlin using Spring Boot, deployed on AWS, serving millions of customers.

You will work on RESTful APIs, data schemas in PostgreSQL, event-driven architectures with Apache Kafka, and a payment orchestration system to optimize costs and reliability. Strong focus on security and reliability.