Sezzle

Senior Payments Engineer — Acquiring & Payment Processing

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5 days ago
Remote, TurkeySenior

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, transactional outboxes, and queues.
  • Implement payment-data security practices including tokenization, network tokens, and applicable 3DS/SCA flows within PCI DSS scope.
  • 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, 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, including building and serving REST APIs.
  • Hands-on experience integrating payment processors, gateways, or acquiring systems and understanding authorization, settlement, tokenization, idempotency, reconciliation, and disputes.
  • Experience with distributed cloud architectures, transactional outboxes, and queuing tools such as Kafka, SQS, or RabbitMQ.
  • Demonstrated hands-on experience using Claude or an equivalent large language model to improve productivity, research, communication, coding, or testing.
  • Bachelor’s degree in Computer Science, Engineering, or a related field.
  • Experience with SQL-based relational databases through an ORM.
  • Experience with observability platforms such as Prometheus, New Relic, or Datadog.
  • Experience with DevOps and CI/CD pipelines, containerized microservices, Kubernetes, and AWS.
  • Experience delivering commercial APIs and web applications and prioritizing improvements based on stakeholder or customer feedback.
  • Preferred experience with acquiring ecosystems and processors such as Adyen, Stripe, Marqeta, and Fiserv, plus PCI DSS, 3DS/SCA, network tokenization, and payments compliance.

Benefits

  • Remote, full-time position.
  • Monthly gross compensation is $5,000–$9,500 USD.
  • Access to a culture emphasizing AI-assisted engineering, open-source technology, and collaboration across engineering and business teams.

Tech Stack

Apache KafkaAWSDatadogElasticsearchGitGoKubernetesMySQLPostgreSQLPrometheusPythonRabbitMQReactReact NativeSQLTypeScript

Categories

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About Sezzle

201-500 employees
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