// Profile

Principal · Staff · Senior Engineer

0%
Build-time reduction (Base24-eps: 4h → 15 min)
$0M
Hardware costs avoided (120M-card modernization)
0M
Cards modernised (COBOL → Java)
0+
Years in payments & security
A forward-thinking, highly specialized cryptographic software engineer who designs and delivers secure, high-performance systems supporting global payment ecosystems. Strong history of modernizing legacy platforms, introducing advanced technologies, and solving complex scalability and security challenges. Combines deep technical expertise with leadership to guide cross-functional teams and deliver enterprise-grade cryptographic and platform-modernization initiatives.
Cryptography Payment Systems Cloud Modernization Engineering Leadership
// Career

WorkExperience

Mastercard · O'Fallon, MO
HSM EngineeringCryptographic Security94% Build ReductionIntel SGX Pioneer
May 2012 – May 2026 · 14 yrs
Multi-year progression from Senior Consultant to Principal Software Engineer across Cryptographic Security, HSM Engineering, Distributed Services, and Platform & Infrastructure. Established Mastercard’s first Intel SGX confidential-computing product, introduced Rust to the org, and led a flagship J2EE → Angular/microservices modernisation.
ACI Worldwide · Omaha, NE
Base24-epsTransaction SecurityGlobal Teams
Jul 2007 – Apr 2012 · ~5 yrs
Provided cost estimation and technical leadership for Base24-eps projects across HP NonStop, HP-UX, AIX, and Mainframe environments. Led global development and testing teams for mid-to-large projects while delivering on-site transaction security consulting and customer training.
// Expertise

Skills &Capabilities

Cryptography & Security
PKCS#11Intel SGXThales LunaPayshieldEntrust nShieldUtimacoAtallaEMVPCI-DSSPost-QuantumConfidential ComputingKey Management
Payment Systems
Base24-epsISO 8583HP NonStopATM NetworksPOS NetworksCard IssuanceTransaction SecurityFraud Detection
Cloud & DevOps
AzureAWSPCFDockerKubernetesJenkinsAnsibleTerraformOpenTofuChef
Languages & AI
RustC/C++JavaC#PythonJavaScriptGoSpring BootChatGPTClaude CodeGitHub CopilotMCPOllamavLLM
Leadership
Team LeadershipTechnical MentorshipStakeholder EngagementRoadmap DefinitionCode Review GovernanceKnowledge Sharing
// Background

Education &Credentials

Master's Degree
MS, Information Systems
Universidad Tecnológica Nacional (UTN), Buenos Aires, Argentina
Graduated
Bachelor's Degree
Information Systems Engineer
Universidad Tecnológica Nacional (UTN), Buenos Aires, Argentina
Graduated
Certifications: Entrust nShield CSEMastercard AgileTransaction SecuritySecure CodingBase24-eps SDKBase24-InfobaseParagon ATMulatorOracle GoldenGate
// Connect

Let'sTalk

Open to Senior & Principal Engineering Roles

Cryptographic security · HSM engineering · payment platforms · cloud modernisation. Available for remote, onsite, and hybrid opportunities in the Greater St. Louis area.

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© 2026 Gerardo De Las Heras · Principal Software Engineer · St. Louis, MO