Senior Software Engineer

Mastercard is hiring a Senior Software Engineer in Oslo, Norway. Level rates it ; you can apply on Mastercard.

Level's read on this job

On Level's scale, this software engineer role is Little AI ●○○○: aI is not part of the work.
Level classes it as a senior role.
Mastercard has 1,000+ other open roles on Level.

AI in this role

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

Overview
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.

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

We are looking for someone who:
• 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
• 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

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.

How we rate this

Senior Software Engineer at Mastercard rates 29 out of 100 for how much of the daily work is AI. That makes it Little AI (AI Level 1 of 4). The level is about AI in the job, not seniority.

Classification

Little AI. AI is not part of the work.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.