Lead Software Engineer (Java/Python/Go) – Fraud Platforms

Mastercard; Blanchardstown; On-site; EUR 110,000 - 150,000; Full time

Job summary

Mastercard is seeking a Lead Software Engineer to modernize platforms, focusing on Fraud Rules/Engines and large-scale migrations. The role requires collaborative leadership and hands-on coding across Go, Python, and Java.

You will mentor teams, shape architectural decisions, and drive PoC initiatives in a fast-paced, security-conscious environment. The ideal candidate brings 8+ years of software and microservices experience and a track record of delivering scalable systems.

Qualifications

• 8+ years in software development and microservices architecture.
• Experience with Go, Python, Java and multiple frameworks.
• Lead large-scale migrations and fraud rule engines.
• Strong communication and leadership abilities.

Responsibilities

• Lead modernization of platforms, especially Fraud Rules/Engines.
• Collaborate with cross-functional teams and provide technical leadership.
• Ensure designs align with security, compliance, and architecture standards.
• Mentor development teams and drive PoC and pilots.

Skills

Go

Python

Java

Microservices

Leadership

Education

Bachelor's degree in Information Technology

Tools

Gen AI

LLMs

Job description

Mastercard is seeking a Lead Software Engineer to modernize platforms, focusing on Fraud Rules/Engines and large-scale migrations. The role requires collaborative leadership and hands-on coding across Go, Python, and Java.

You will mentor teams, shape architectural decisions, and drive PoC initiatives in a fast-paced, security-conscious environment. The ideal candidate brings 8+ years of software and microservices experience and a track record of delivering scalable systems.