2 months ago
Remote, ArgentinaSenior
Responsibilities
- Design and build Golang backend services integrating with payment processors, gateways, and card networks.
- Own authorization, capture, settlement, refunds, reconciliation, and chargeback or dispute workflows end to end.
- Build idempotent, fault-tolerant, auditable transaction processing using distributed architecture and queuing patterns.
- 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.
- Collaborate with Product, Risk, Compliance, Support, and other engineering teams.
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 APIs.
- Hands-on experience integrating with payment processors, gateways, or acquiring systems.
- Knowledge of authorization, settlement, tokenization, idempotency, reconciliation, and chargebacks or disputes.
- Experience with distributed cloud architectures, transactional outboxes, and 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.
- Experience with SQL-based relational database management systems through an ORM.
- Experience with observability platforms such as Prometheus, New Relic, or Datadog.
- Familiarity with DevOps, CI/CD pipelines, containerized microservices, Kubernetes, and AWS.
- Experience delivering commercial APIs and web applications.
- Experience shipping products and prioritizing improvements based on stakeholder or customer feedback.
- Preferred payments acquiring experience with Adyen, Stripe, Marqeta, Fiserv, or similar providers.
- Preferred exposure to PCI DSS, 3DS/SCA, network tokenization, or payments compliance.
Benefits
- Full-time remote role.
- Monthly gross salary range of $5,000-$9,500 USD.
- AI-first engineering culture with responsible use of Claude and equivalent LLM tools.
- Opportunity to work on payments infrastructure with mentorship, ownership, and cross-functional collaboration.
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.