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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
Software Engineer II – Integrations & API Connectivity
Overview
Mastercard is a global technology company powering an inclusive, digital economy, enabling secure and seamless transactions across 210+ countries.
This role sits within Mastercard’s Open Finance Europe – Connectivity team, responsible for building and operating scalable API integrations with financial institutions across Europe.
As a Software Engineer II, you will be a hands-on engineer responsible for building, testing, and supporting secure, reliable backend services. You will contribute to the development of scalable solutions, collaborate with experienced engineers on system design and implementation, and help deliver high-quality software that operates in production environments.
What You'll Do
Develop, test, and support scalable APIs and backend services
Contribute to the design and implementation of reliable, maintainable software solutions
Deliver high-quality code throughout the software development lifecycle
Troubleshoot and resolve application and production issues under guidance from senior team members
Participate in code reviews and follow established engineering best practices and standards
Implement and maintain unit, integration, and end-to-end tests
Collaborate with cross-functional teams including Product, Architecture, Security, and SRE
Support efforts to improve observability, automation, and operational efficiency across services
Continuously learn and apply new technologies, tools, and engineering practices
Technology Stack
Backend: C#, .NET, Web APIs
Cloud: Azure (App Services, KeyVault, Blob Storage), AWS (S3, Redis, Microservices)
Data: PostgreSQL, Flyway
Practices: CI/CD pipelines, observability, secure development
Plus: Java / Spring Boot, AI-assisted tools (e.g., GitHub Copilot)
What You Bring - Required
2-4 years of professional software engineering experience
Experience developing backend applications and APIs using modern programming frameworks
Familiarity with cloud platforms and distributed systems concepts
Understanding of software development lifecycle (SDLC), testing practices, and secure coding principles
Ability to analyze and solve technical problems with guidance from senior engineers when needed
Experience delivering software components and features in a collaborative team environment
Strong communication and teamwork skills
Commitment to learning, continuous improvement, and engineering excellence
Preferred
Experience in payments, banking, or Open Banking (PSD2) environments
Exposure to microservices-based architectures
Familiarity with monitoring, observability, and production support practices
Experience using AI-assisted development tools (e.g., GitHub Copilot)
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.
Work arrangement
No
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