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# Software Engineer- Java

- **Company:** Mastercard
- **Location:** Oslo, MN, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Unit Testing, Code Review, Cyber Security, Data Security, Software Debugging, Distributed Systems, Systems Development Life Cycle, Software Engineering, Software Systems, Strategies of Testing, Code Testing
- **Published:** September 11, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-software-engineer-java-oslo-mn--91977aeb-ace7-44f4-9038-ba4d68cd6e30

## About the Role

* Has strong experience in software development across modern technologies and architectures
 * Demonstrates solid understanding of system design, APIs, and scalable distributed systems
 * Writes clean, efficient, and well-tested code, with strong debugging and problem-solving skills
 * Good understanding of account-based payments and enabling schemes and integrations towards ERP systems
 * Experience from fintech, open banking, bank APIs, ERP integrations or accounting software environments
 * Has experience with test strategies and quality practices across the SDLC
 * Is comfortable working in complex, multi-tiered systems and production environments
 * Communicates clearly and effectively across technical and non-technical stakeholders
 * Shows ownership, accountability, and a drive to deliver high-quality outcomes
 * Is proactive in identifying improvements and driving change
 * Enjoys mentoring others and contributing to a strong engineering culture
 * Thrives in a collaborative and agile environment, Accounting Software, Application Programming Interface (API), Architectural Services, Backlog Prioritization, Banking Services, Best Practices, Code Reviews, Communication Skills, Continuous Improvement, Cross-Functional, Data Quality, Debugging Skills, Distributed Computing, ERP (Enterprise Resource Planning), Identify Issues, Information Assets, Information/Data Security (InfoSec), Java, Maintain Compliance, Mentoring, Problem Solving Skills, Process Improvement, Product Engineering, Production Support, Production Systems, Risk, Scalable System Development, Software Development, Software Engineering, Systems Scalability, Team Player, Technical/Engineering Design, Test Strategy, Unit Test

## Description

As a Senior Software Engineer, you will play a key role in designing, building, and evolving resilient, scalable, and high quality software solutions that deliver real business value.

You will contribute to technical direction, influence architectural decisions, and drive engineering excellence across systems, processes, and practices.

You will collaborate closely with product, engineering, and operations teams to solve complex challenges, ensure high quality delivery, and support reliable production systems.

Role

In this role, you will:

 * Design, develop, and maintain scalable and reliable software solutions aligned with business needs
 * Contribute to architecture and technical design decisions across systems and services
 * Write high-quality, maintainable, and well-tested code
 * Perform code reviews and ensure adherence to engineering standards and best practices
 * Lead or actively contribute to planning, prioritization, and backlog management
 * Troubleshoot and resolve complex technical issues across systems and environments
 * Ensure high levels of quality through testing strategies (unit, integration, performance, etc.)
 * Collaborate with cross-functional stakeholders (product, architecture, operations) to deliver end-to-end solutions
 * Drive continuous improvement of development practices, tools, and processes
 * Mentor and guide junior engineers, fostering a culture of learning and collaboration, 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.


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