L2/L3 Payments Support Engineer

Overview

Remote
$50 - $55
Contract - W2

Skills

ACI Base 24
ATM

Job Details

Job Role:L2/L3 Payments Support Engineer

Job location:Remote

Job Type: W2 Contract

Job Description:

Role Overview

As part of our dedicated payment operations support team , we are seeking a highly skilled L2/L3 Payments Support Engineer with hands-on experience in ACI Base24 / MTS (Modular Transaction Switch) platforms. The role is critical to ensuring the resilience, integrity, and continuous availability of high-volume payment processing systems including ACH, Wire, Card Payments, Real-Time Payments (RTP), and Digital Wallet transactions.

You will collaborate with application support, infrastructure, and payment operations teams to maintain service levels and respond to critical issues, while working closely with vendors such as ACI Worldwide.

Responsibilities:

Level 2 Responsibilities:

  • Monitor transaction flows (ATM, POS, Online, RTP) and proactively resolve payment disruptions.
  • Handle incidents, service requests, and escalations within defined SLAs.
  • Coordinate with infrastructure teams for patch management, capacity issues, or system upgrades.
  • Support change control processes for deployments across non-prod and prod environments.

Level 3 Responsibilities:

  • Deep-dive analysis on production incidents involving ACI Base24, MTS, or switching components.
  • Review and optimize transaction routing, message parsing (ISO 8583), and settlement interfaces.
  • Debug source code (if applicable) or configuration scripts and interface logs.
  • Drive problem management and post-incident reviews with full RCA documentation.
  • Liaise with ACI or third-party vendors for code-level fixes and updates.
  • Collaborate on compliance and security tasks including PCI-DSS, fraud alert handling, and audit support

Required Skills & Experience

  • 5+ years in Payments Support, including L2/L3 roles within enterprise banking environments.
  • Expertise in:
    • ACI Base24 Classic / UP Framework
    • Modular Transaction Switch (MTS)
    • ISO 8583 / XML / JSON payment messages
  • Knowledge of:
    • Card processing systems (debit/credit, EMV, tokenization)
    • ACH, Wire, and RTP flows
    • Middleware and interfaces (e.g., MQ, APIs, TCP/IP)
  • Proficiency in:
    • Unix/Linux administration
    • Shell/PERL scripting
    • SQL and relational databases
  • Familiar with tools like Splunk, AppDynamics, ELK, Control-M, etc.
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