Backend Developer

Paymentology is the first truly global issuer-processor, giving banks and fintechs the technology, team and experience to rapidly issue and process Mastercard, Visa and UnionPay cards across more than 60 countries, at scale.

Our advanced, multi-cloud platform, offering both shared and dedicated processing instances, vast global presence and richer, real-time data, set us apart as the leader in payments.

We are looking for a Backend Developer with strong Java/Kotlin skills to join our team. You’ll work on building scalable, high-performance backend systems using a modern tech stack. This role requires hands-on experience with Spring Boot, PostgreSQL, and AWS, as well as a solid understanding of asynchronous programming and microservices.

What you get to do::

Develop and maintain backend services and APIs using Java/Kotlin and Spring Boot.
Build reactive systems with WebFlux and asynchronous programming techniques like Coroutines.
Design and optimise relational database structures and queries in PostgreSQL.
Use Gradle for dependency management and build automation.
Containerise applications with Docker and deploy them on AWS infrastructure.
Ensure application performance, scalability, and reliability through testing and optimisation.
Collaborate with team members on code reviews, architecture decisions, and technical direction.

Requirements:

What it takes to succeed:

Languages: Proficiency in Java or Kotlin, with experience in backend development.
Frameworks: Strong knowledge of Spring Boot and experience with reactive programming using WebFlux.
Database: Hands-on experience with PostgreSQL, including schema design and query optimization.
Build Tools: Familiarity with Gradle for project build and dependency management.
Infrastructure: Experience with Docker for containerisation and deployment on AWS.
Programming Models: Practical understanding of Coroutines and asynchronous programming.
API Development: Solid knowledge of RESTful APIs and microservices architecture.

Nice-to-Have:

Knowledge of CI/CD pipelines and infrastructure-as-code tools.
Familiarity with monitoring and logging tools for distributed systems.

Tech Stack Overview

Languages: Java, Kotlin
Frameworks: Spring Boot, WebFlux
Database: PostgreSQL
Build Tools: Gradle
Infrastructure: Docker, AWS
Concurrency: Coroutines

Why Join Us?

Work with a modern tech stack on real-world problems.
Build scalable systems with a focus on performance and reliability.
Join a team of like-minded engineers focused on technical excellence.

What you can look forward to::

At Paymentology we value making a difference to the lives of the people who work for us and who live in the communities where we operate. You can look forward to working with a diverse, global team where Paymentologists at all levels play an important part in our global mission to advance the world through payments and make a difference on a global scale.

Backend Developer

Key Skills

Related Jobs

Software Engineer

Sr Software Engineer - Screening Engine

Senior Java/Kotlin Software Engineer - London

Related Jobs

Software Engineer

Sr Software Engineer - Screening Engine

Senior Java/Kotlin Software Engineer - London

Cookie Settings