2 months ago
Remote, MexicoSenior
Responsibilities
- Design and build Golang backend services integrating with payment processors, gateways, and card networks.
- Own authorization, capture, settlement, refunds, reconciliation, and chargeback/dispute workflows end to end.
- Build idempotent, fault-tolerant, auditable transaction processing using distributed-architecture patterns and queues.
- Operate within PCI DSS scope, including tokenization, network tokens, secure payment-data handling, and applicable 3DS/SCA flows.
- Instrument and monitor authorization rates, decline rates, processor performance, latency, and settlement accuracy.
- Use Claude or equivalent LLM tools for design, coding, research, testing, and documentation while following security and data-handling policies.
- Mentor engineers, unblock peers, raise engineering standards, and occasionally lead small project teams to delivery.
Requirements
- 7+ years of backend or full-stack engineering experience, including meaningful experience with payments, fintech, or money-movement systems.
- Strong Go experience preferred, or comparable Python experience, building and serving backend APIs.
- Hands-on experience integrating with payment processors, gateways, or acquiring systems and understanding authorization, settlement, tokenization, idempotency, reconciliation, and disputes.
- Experience with distributed, cloud-based architectures and transactional outboxes or queuing tools such as Kafka, SQS, or RabbitMQ.
- Demonstrated hands-on use of Claude or an equivalent LLM to improve productivity, research, communication, and engineering output.
- Bachelor's degree in Computer Science, Engineering, or a related field.
- Preferred experience includes SQL-based relational databases through an ORM, Prometheus, New Relic, or Datadog, CI/CD pipelines, Kubernetes, AWS, commercial APIs, and web applications.
- Preferred payments experience includes Adyen, Stripe, Marqeta, Fiserv, PCI DSS, 3DS/SCA, network tokenization, and payments compliance.
Benefits
- Full-time remote role.
- Employees can participate in a culture emphasizing innovation, high standards, professional growth, and varied personal interests.
Tech Stack
Apache KafkaAWSDatadogElasticsearchGitGoKubernetesMySQLPostgreSQLPrometheusPythonRabbitMQReactReact NativeTypeScript
Categories
About Sezzle
Sezzle builds a buy now, pay later platform that lets consumers split purchases into interest-free installments online and in stores, integrated with e-commerce and retail merchants. The company earns revenue from merchant fees and related consumer charges and provides underwriting and payment processing services. Founded in 2016 and headquartered in Minneapolis, Sezzle is a public company dual-listed on Nasdaq and the ASX.