Overview

About StoneX Enterprise Technology and global payments

StoneX Global Payments is a leading global payments fintech providing cross‑border FX and payments solutions to corporations, NGOs, and institutions across 180+ countries and 140+ currencies. Our mission is to build the next‑generation global payments platform—scalable, efficient, fault‑tolerant, and powered increasingly by intelligent automation.

We are undergoing a multi‑year modernization effort across our front, middle, and back‑office systems, leveraging cloud-native architectures, microservices, and now agentic AI engineering to accelerate delivery and reshape end‑to‑end payment flows.

Responsibilities

Position Purpose

We are seeking a Java Backend Developer (Mid-Level) to contribute to the development of

our next-generation financial platform and the foundation of StoneX's global client platform

transformation.

In this role, you will build scalable and secure backend services using Java and Spring Boot,

collaborating closely with frontend developers, QA engineers, product managers, and senior

engineers to deliver high-quality financial solutions.

Primary Responsibilities

Backend Development

Design, develop, and maintain backend services using Java and Spring Boot.
Build RESTful APIs and microservices.
Write clean, maintainable, well-tested code.
Participate throughout the SDLC from design to deployment.

API Development & Integration

Design and implement RESTful APIs following best practices.
Collaborate with frontend teams to define API contracts and support BFF/API

integration.

Implement validation, pagination, error handling, and secure API design.
Integrate with internal and third-party services.

Performance & Reliability

Develop scalable, low-latency backend services.
Troubleshoot production issues and perform root cause analysis.
Contribute to application stability and performance improvements.

Data & Messaging

Work with relational databases and schema versioning tools.
Develop event-driven solutions using Kafka (or similar messaging platforms).

Security & Compliance

Follow secure patterns for handling sessions, tokens, and authenticated flows.
Follow secure coding standards and regulatory requirements.

Cloud & Platform

Work with Docker and Kubernetes.
Contribute to CI/CD pipelines (Azure DevOps or Jenkins).

Observability

Use monitoring and logging tools such as Datadog.
Support production monitoring and incident investigations.

Ownership & Proactiveness

Demonstrate strong ownership by driving tasks end-to-end, from requirements

clarification through development, testing, deployment, and production support

Proactively identify risks, dependencies, gaps, and improvement opportunities beyond

the immediate scope of assigned Jira tickets.

Think from a holistic customer and business perspective, considering the complete end

to-end workflow and system impact when designing and implementing solutions.

Take initiative in collaborating across teams to resolve issues, remove blockers, and

ensure successful delivery of outcomes.

Qualifications

Required Qualifications

3–5 years of professional Java backend development experience.
Strong knowledge of Java 21 and Spring Boot 3.x.
Experience building RESTful APIs and microservices.
Experience with SQL databases.
Experience with Kafka or RabbitMQ.
Understanding of OAuth2/JWT.
Experience with unit and integration testing (JUnit, Mockito, Testcontainers or similar).
Experience with Git and Agile methodologies.
Basic experience with Docker.
Strong problem-solving skills and willingness to learn.

What Will Make You Stand Out

Experience with Kubernetes and Azure or AWS.
Experience with CI/CD pipelines.
Knowledge of contract testing.
Experience collaborating closely with frontend teams and BFF development.
Experience building real-time or event-driven financial systems.
Knowledge of monitoring and observability practices.

Education

Bachelor's or Master's degree in Computer Science, Engineering, or a related field (or

equivalent practical experience).

Working Environment

Hybrid (4 days in the office).

Staff - IT Software Engineering