Senior Payments Engineer – Acquiring, Payment Processing

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Sezzle

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2016

💳 Fintech

👥 B2C

🛍️ eCommerce

Fintech • B2C • eCommerce

Sezzle is a financial technology company that offers a "buy now, pay later" service, allowing consumers to purchase products and pay for them in four interest-free installments over six weeks. The Sezzle app provides users with a flexible financing alternative to traditional credit cards, enabling instant approval decisions without impacting credit scores. Sezzle partners with various top brands, including Amazon, Walmart, and Target, to offer in-app and in-store payment options. The company's mission is to empower consumers financially by providing more financial freedom and control. It is available as a mobile app, with millions of downloads and high user ratings, and works towards accessibility and inclusion on its platform.

📋 Description

• Design and build backend services in Golang that integrate with payment processors and gateways • Own critical money-movement flows end to end: authorization, capture, settlement, refunds, reconciliation, and chargeback/dispute handling • Operate within PCI DSS scope • Instrument and monitor payment health • Mentor engineers and help raise the bar across the team.

🎯 Requirements

• 8+ years of experience in backend or full-stack engineering • Strong Go (preferred), or comparable experience in Python • Hands-on experience integrating with payment processors, gateways, or acquiring systems • Experience in distributed, cloud-based architectures using patterns like transactional outboxes or queuing tools (Kafka, SQS, RabbitMQ) • Bachelor's degree in Computer Science, Engineering, or a related field. • Demonstrated experience working with AI tools like Claude or equivalent large language model tools.

🏖️ Benefits

• Health insurance • Professional development opportunities