Senior Software Engineer - Java

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Senior Software Engineer - Java
Overview
The Senior Java Engineer is an elite, hands on builder responsible for designing, building, and operating production grade backend services that power Commerce Media's platform. This role focuses on delivering reliable, scalable, and maintainable Java services using Spring Boot, with a strong emphasis on API driven workflows and well structured CRUD systems.
Senior Java Engineers operate under the architectural direction of an Engineering Lead while owning complex implementations end to end. Success is measured by the quality, performance, and correctness of the systems they deliver.
Role• Design, implement, and maintain Spring Boot-based backend services supporting CME platform capabilities.• Build and evolve API first services that expose clean, well documented interfaces for frontend and partner integrations.• Implement robust CRUD workflows backed by well modeled relational and/or NoSQL data stores.• Own services end to end, including:
o Data modeling and persistence
o API design and versioning
o Error handling and validation
o Performance optimization and reliability• Write comprehensive unit and integration tests to ensure correctness and regression safety.• Collaborate closely with Frontend, Platform, and Data engineers on API contracts and data flows.• Participate in design reviews, code reviews, and production support activities.• Contribute to shared engineering standards around observability, security, and maintainability.
All About You• You are a pragmatic backend engineer who values clarity, correctness, and maintainable design.• You are deeply hands on and take pride in shipping clean, production ready code.• You think in terms of APIs, contracts, and data models, not just endpoints.• You are comfortable owning services in production and improving them incrementally over time.• You communicate clearly with teammates and proactively surface risks or trade offs.
Experience• 5-7 years of professional experience building backend systems in Java.• Strong expertise with Spring Boot and related ecosystem tools.• Proven experience building CRUD based applications with clean data models and persistence layers.• Hands on experience designing and implementing RESTful, API driven workflows.• Solid understanding of relational databases, ORMs, and query optimization.• Experience with containerized deployments (Docker) and exposure to Kubernetes environments.• Familiarity with observability practices (logging, metrics, tracing).• Experience operating and supporting services in production environments.
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

• Abide by Mastercard's security policies and practices;
• Ensure the confidentiality and integrity of the information being accessed;
• Report any suspected information security violation or breach, and
• Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.