Lead Software Engineer - Java

Mastercard Inc.; Oslo; On-site; NOK 900,000 - 1,200,000; Full time

Job summary

Mastercard Inc. in Oslo is seeking a Lead Software Engineer - Java who designs, builds and operates secure, scalable payment software.

You will combine hands-on development with technical leadership, collaborating with product, operations, architecture and risk teams to deliver reliable services. You bring deep Java expertise (8+), experience with Spring, Docker and cloud-native patterns, and a passion for quality, automation and continuous improvement, while mentoring colleagues and shaping

Qualifications

• Strong experience designing, developing, integrating, testing, and maintaining production software systems.
• Good understanding of architecture patterns, system design, performance, resilience, and maintainability.
• Experience with secure coding, code quality, code reviews, troubleshooting, root cause analysis, and corrective actions.
• Practical knowledge of automation, DevOps toolchains, cloud-native patterns, and service integration.
• Experience building testing into delivery, including unit, functional, integration, regression, performance, resilience, and acceptance testing.

Responsibilities

• Design, build, integrate, and improve secure, scalable applications and services.
• Take ownership of complex service issues and coordinate resolution across teams.
• Work with product partners and stakeholders on priorities, trade-offs, and technical roadmaps.
• Improve delivery quality through automation, code reviews, testing, scanning, and standard engineering practices.
• Use incident learnings to strengthen stability, resilience, and continuous improvement.
• Introduce new technologies and reusable patterns within enterprise guidelines.

Skills

Production software systems

System design

Performance

Resilience engineering

Secure coding

Code reviews

Automation

Testing

Mentoring engineers

Cross-team collaboration

Tools

Core Java

Spring

Spring Boot

Hibernate

Maven

Jenkins

Linux

Git

Oracle

Docker

React JS

Job description

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 Lead Software Engineer - Java

Are you an experienced software engineer who enjoys solving complex technical challenges and helping others build better solutions? As a Lead Software Engineer, you will design, build, and operate secure, scalable, and resilient technology that supports important payment services. You will combine hands‑on development with technical leadership and work closely with teams across product, operations, architecture, infrastructure, risk, and customer‑facing functions.

Mastercard Payment Services: In Mastercard Payment Services, you will contribute to critical European payment clearing and settlement services. This includes real‑time and batch clearing, instant payments, participant‑facing services, liquidity and settlement capabilities, reporting, and related payment infrastructure. You will help ensure these services are reliable, secure, and resilient by applying strong engineering practices, automation, production ownership, and continuous improvement.

What you will do:

• Design, build, integrate, and improve secure, scalable applications and services.
• Take ownership of complex service issues and coordinate resolution across teams.
• Work with product partners and stakeholders on priorities, trade‑offs, and technical roadmaps.
• Improve delivery quality through automation, code reviews, testing, scanning, and standard engineering practices.
• Use incident learnings to strengthen stability, resilience, and continuous improvement.
• Introduce new technologies and reusable patterns within enterprise guidelines.

How you will lead:

• Provide hands‑on technical guidance on architecture, development, and engineering practices.
• Collaborate across teams, functions, and organisations to deliver shared outcomes.
• Encourage knowledge sharing, reusable patterns, and active engineering communities.
• Support fair, evidence‑based hiring and promotion input when needed.

What you bring:

• Strong experience designing, developing, integrating, testing, and maintaining production software systems.
• Good understanding of architecture patterns, system design, performance, resilience, and maintainability.
• Experience with secure coding, code quality, code reviews, troubleshooting, root cause analysis, and corrective actions.
• Practical knowledge of automation, DevOps toolchains, cloud‑native patterns, and service integration.
• Experience building testing into delivery, including unit, functional, integration, regression, performance, resilience, and acceptance testing.
• Ability to collaborate across teams, mentor engineers, and influence engineering practices.

Technical experience:

• Core Java 8+, Spring, Spring Boot, Hibernate, Maven, Jenkins, Linux, Git, Oracle, and Docker.
• React JS is an advantage.
• Experience using AI‑assisted tools to develop code is welcome.

What success looks like:

You will succeed in this role if you enjoy combining hands‑on engineering with technical leadership, sound judgement, and the ability to influence outcomes across services and teams. Your work will help strengthen engineering quality, delivery flow, production ownership, operational resilience, security, and continuous improvement for customer‑facing payment services.

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.

Everyone wants easier ways to pay; we invent them. Checkout lines are slow; we speed them along. Merchants want more sales; we give them data and insights. People need financial access; we connect them. Corporate purchasing is complicated; we make it simple. Commuters are busy; we speed them on their way. Governments need greater efficiencies; we help create them. Small businesses are virtual; we give them access to a world of buyers. Retailers want to fight fraud; we provide the tools.