We are seeking a highly experienced Senior Payment Gateway Engineer / S2S & API Integration Specialist to support the development, deployment, integration and management of a secure, scalable international payment technology platform.

This is a specialized technical position for professionals with proven, hands-on experience in banking payment systems, server-to-server (S2S) transactions, IP-to-IP connectivity and payment API integrations.

Key Technical Requirements

âœ… S2S Payment Integration: Server-to-server payment processing, authentication, authorization, webhooks and transaction handling.

âœ… IP-to-IP Connectivity: Secure server communications, IP whitelisting, VPNs, routing, firewalls and network security.

âœ… Payment APIs: REST APIs, JSON/XML, banking APIs, payment gateway integrations and third-party PSP connectivity.

âœ… Banking Protocols: Understanding of ISO 8583, ISO 20022 and payment messaging standards.

âœ… Server Infrastructure: Linux/Windows server administration, VPS, dedicated servers, cloud hosting, SSL/TLS and secure deployments.

âœ… Payment Security: PCI DSS, encryption, tokenization, HSM integration and secure credential management.

âœ… Backend Technologies: Java, Python, Node.js, .NET or equivalent payment integration technologies.

âœ… Transaction Management: Payment authorization, capture, refunds, reconciliation, settlement, logging and monitoring.

âœ… Production Reliability: Load balancing, high availability, disaster recovery and troubleshooting.

Candidate Profile

5+ years of relevant professional experience preferred.
Demonstrated experience implementing live payment gateway or banking integrations.
Practical experience with European payment service providers, acquirers or financial institutions is a strong advantage.
Ability to design, deploy and troubleshoot secure production payment infrastructure.
Strong problem-solving skills and independent technical leadership.

Important: General IT support, Cisco IP telephony or basic server administration alone will not qualify candidates for this specialist position.

Position Details

Company: Prime Axis Strategic Consultants
Position: Senior Payment Gateway & S2S Integration Specialist
Project Market: Europe
Employment Type: Project-based / Contract / Full-time â€” subject to agreement
Compensation: Competitive, based on expertise and demonstrated experience

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About the company

Prime Axis Consultants

Business Consulting and Services • 1-50 employees

Prime Axis Consultants provides professional business consultancy and compliance solutions across Saudi Arabia