Senior Software Engineer (Full Stack)

Role
As a Senior Software Engineer, you will play a key role in the design, development, and delivery of scalable web applications that serve our customers. You'll take ownership of features across the stack, from designing backend APIs in Go to building responsive user interfaces in React. Your work will directly impact how customers interact with and act on cybersecurity data and insights.

Primary Responsibilities
- Design, build, and maintain fullstack applications using Golang (backend) and TypeScript/React (frontend).
- Develop and maintain scalable APIs and services that serve real-time data to customers.
- Collaborate with product managers and designers to implement intuitive, accessible, and performant user interfaces.
- Ensure high standards of code quality through testing, code reviews, and continuous improvement.
- Work with DevOps and platform teams to ensure applications are deployed reliably and monitored effectively.
- Optimize systems for performance and scalability as usage grows.
- Contribute to architectural decisions and influence the overall technical direction of customer-facing products.

All About You
- You are a product-minded engineer who cares deeply about the end-user experience.
- You thrive in a collaborative environment and enjoy working across disciplines.
- You bring strong engineering fundamentals, attention to detail, and a drive to ship high-quality software.
- You're comfortable working independently on complex projects.

You Have
- 5+ years of professional software engineering experience.
- Strong hands-on experience with Golang, TypeScript, and React.
- Proven experience building, scaling, and maintaining web applications in production environments.
- Deep understanding of API design, REST/GraphQL, and backend service architecture.
- Familiarity with modern frontend frameworks, build tools, and testing practices.
- Experience working in cloud-native environments (e.g., Docker, Kubernetes, AWS/GCP).
- Excellent communication skills and a strong desire to collaborate and share knowledge.
- A passion for clean code, automation, and continuous delivery.

Nice to Have
- Experience working in security-focused environments or with cybersecurity data.
- Familiarity with authentication/authorization standards (OAuth2, SAML, JWT).
- Experience with observability tools (e.g., Prometheus, Grafana, Sentry).
- Understanding of accessibility and internationalization best practices.

Why Join Us?
This is your chance to build modern, impactful software that users rely on daily to navigate complex cybersecurity challenges. You'll work on a collaborative team that values innovation, autonomy, and delivering value to customers.

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.

Client-provided location(s): Åkersberga, Sweden

Job ID: Mastercard-22331_R-257774

Employment Type: OTHER

Posted: 2025-08-13T01:42:41