Tech Lead, Fraud Rules & Global Platform (Java/Python/Go)

Mastercard; Swords; On-site; EUR 90,000 - 130,000; Full time

Job summary

Mastercard is a global technology company in the payments industry, powering economies and enabling secure, fast, and accessible digital transactions. We are seeking a Lead Software Engineer to drive modernization of fraud rule platforms, guide large-scale migrations and shape engineering excellence across cross-functional teams.

You will write high-quality, multi-language code (Go, Python, Java), mentor engineers, and ensure solutions align with architecture, security, and regulatory

Qualifications

• Proficient in Go, Python and Java for multi-language platforms.
• Experience with Fraud Rule Engines and large-scale migrations.
• Strong knowledge of software development practices and DevOps basics.

Responsibilities

• Lead modernization of platforms relating to Fraud Rules/Engines.
• Collaborate with cross-functional teams to design solutions.
• Ensure designs meet architecture, security and compliance.
• Lead PoC and pilot projects and mentor the team.
• Hands-on coding and delivering scalable, high-throughput systems.

Skills

Go

Python

Java

Fraud Rules Engine

Large-scale migrations

APIs

Education

Bachelor's degree in Information Technology or Computer Science

Job description

Mastercard is a global technology company in the payments industry, powering economies and enabling secure, fast, and accessible digital transactions. We are seeking a Lead Software Engineer to drive modernization of fraud rule platforms, guide large-scale migrations and shape engineering excellence across cross-functional teams.

You will write high-quality, multi-language code (Go, Python, Java), mentor engineers, and ensure solutions align with architecture, security, and regulatory