Payments Backend Engineer - High-Volume Secure APIs

Gables Search Group; Bowling Green (KY); On-site; USD 110,000 - 150,000; Full time

Job summary

Gables Search Group seeks an experienced Software Engineer - Payments to build secure, scalable payment services for a multichannel business across in-store, web, mobile, kiosk, and call center environments.

Local candidates only to Bowling Green, KY or Chicago, IL. This role emphasizes high-volume transactions, secure coding, and robust integrations with processors, gateways, and financial institutions using C# and .NET.

Qualifications

• 5–10 years of professional software engineering experience.
• Hands-on development with C# and .NET/.NET Core.
• Experience building REST APIs and integrating third-party platforms.
• Relational databases like SQL Server or PostgreSQL.
• Experience troubleshooting production or transaction-processing systems.
• Knowledge of secure development practices and data protection.
• Strong analytical, communication, and collaboration skills.
• Familiarity with PCI-DSS, EMV, tokenization, or distributed systems is beneficial.

Responsibilities

• Build and enhance payment services and REST APIs using C# and .NET/.NET Core.
• Develop integrations with processors, gateways, acquiring banks, and wallets.
• Support authorization, capture, settlement, refunds, chargebacks, and routing.
• Improve retry logic, exception handling, and observability.
• Troubleshoot production issues across applications and third-party systems.
• Participate in design reviews, incident response, and root-cause analysis.
• Collaborate with Product, Architecture, and Engineering teams to deliver reliable payment capabilities.
• Write secure, maintainable, well-tested code for mission-critical systems.

Skills

C#

.NET/.NET Core

REST APIs

SQL Server

PostgreSQL

Troubleshooting

Secure development practices

Communication

Collaboration

Kafka

RabbitMQ

Azure Service Bus

Cloud platforms

Tools

Kafka

RabbitMQ

Azure Service Bus

Cloud platforms

Job description

Gables Search Group seeks an experienced Software Engineer - Payments to build secure, scalable payment services for a multichannel business across in-store, web, mobile, kiosk, and call center environments.

Local candidates only to Bowling Green, KY or Chicago, IL. This role emphasizes high-volume transactions, secure coding, and robust integrations with processors, gateways, and financial institutions using C# and .NET.