Senior Software Engineer

Posted Yesterday
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Ashbourne, Meath, IRL
Hybrid
Senior level
Blockchain • Fintech • Payments • Consulting • Cryptocurrency • Cybersecurity • Quantum Computing
We are a global technology company in the payments industry.
The Role
Develops AI-first software across the full SDLC, including agentic AI systems, multi-agent workflows, tool-using agents, and scalable integrations. Evaluates AI models, applies emerging standards, and builds production-ready solutions. The role also involves demos, workshops, thought leadership, executive presentations, mentoring, and developer advocacy in an R&D environment.
Summary Generated by Built In
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
Mastercard Foundry R&D is seeking a Senior Software Engineer who is AI-native by default. This role is for an engineer who uses AI in every aspect of daily work- coding, design, planning, reviews, and ideation.
You will contribute to the development of innovative solutions, focusing on new product ideation, concept creation, and presenting solutions to various stakeholders. As a collaborative team member, you will leverage advanced AI tools and methodologies to accelerate innovation and bring products to market more rapidly, working closely with colleagues to drive impactful outcomes across Foundry and the wider Mastercard organisation.
Role & Responsibilities
- Work AI-first across the full SDLC: coding, design, planning, reviews, and innovation - Design and build Agentic AI systems (multi-agent workflows, tool-using agents, orchestration)
- Apply and evolve emerging standards such as AGENTS.md, MCP, and SKILLS
- Evaluate and select AI models with clear understanding of trade-offs (cost, latency, reliability, capability)
- Build scalable, production-ready software and integrations
- Act as an AI Developer Advocate:
- Deliver demos, thought leadership, and workshops
- Present to engineering leadership and C-suite audiences
- Stay current with AI market trends, frameworks, and emerging technologies
Required Experience
- Strong understanding of MCP, AGENTS.md, SKILLS, tool-calling patterns
- Experience with modern AI tooling such as:
- GitHub Copilot
- Claude (UI, CLI, Claude Code)
- OpenAI / Codex-style tooling
Software Engineering
- Expert experience with RESTful APIs, Web standards and related security principles.
- Java (JDK 17+ / Spring Boot), Python, Shell scripting
- Strong experience with UI frameworks such React (ideally Next.js), Angular etc. - Docker, Kubernetes, CI/CD pipelines, SonarQube, Prisma
About You
- AI is how you work, not a side interest
- Comfortable operating in R&D and early-stage environments
- Strong communicator who can explain AI concepts to engineers and executives
- Passionate about developer experience, code quality, and innovation
- Enjoys mentoring and raising the engineering bar for others
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.

Skills Required

  • Strong understanding of MCP, AGENTS.md, SKILLS, and tool-calling patterns
  • Experience with GitHub Copilot
  • Experience with Claude, including UI, CLI, or Claude Code
  • Experience with OpenAI or Codex-style tooling
  • Expert experience with RESTful APIs, Web standards, and related security principles
  • Experience with Java, JDK 17 or later, and Spring Boot
  • Experience with Python and Shell scripting
  • Strong experience with UI frameworks such as React or Angular
  • Experience with Next.js
  • Experience with Docker, Kubernetes, CI/CD pipelines, SonarQube, and Prisma
  • Ability to communicate AI concepts to engineers and executives
  • Mentoring experience and commitment to improving engineering quality

What the Team is Saying

Jenny
Mastercard

Mastercard Compensation & Benefits Highlights

  • Retirement Support Retirement plans are presented as best-in-class with a high company match on 401(k) or local equivalents. Career materials and U.S. postings consistently highlight retirement matching as a standout feature.
  • Leave & Time Off Breadth U.S. postings describe generous paid time off including vacation, personal days, holidays, sick/safe time, and additional bereavement leave. A hybrid policy and a limited “work from elsewhere” option further support time away.
  • Parental & Family Support Company pages state a global minimum of 16 weeks of paid new-parent leave across birth, adoption, and foster, plus family-building assistance where permitted. Mental-health resources and caregiving supports are also emphasized.

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The Company
HQ: Purchase, NY
38,800 Employees
Year Founded: 1966

What We Do

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re building a resilient 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.

Why Work With Us

We live the Mastercard Way: creating value in the communities we touch, growing together through the opportunities we see, and moving fast to innovate and scale. Our collaborative culture and our passionate people are the key to what we do, driving meaningful change as one team and connecting everyone to priceless possibilities.

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Hybrid Workspace

Employees engage in a combination of remote and on-site work.

In our ongoing workplace evolution, we’ve introduced hybrid work, Work-From-Elsewhere Weeks and Meeting-Free Days.

Typical time on-site: 3 days a week
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