Hauler Hero

Backend Engineer

• Design, build, and operate services behind card processing, refunds, and payment reconciliation
• Own processor integrations through a common connector layer, including onboarding new processors and retiring old ones
• Build safe payment pipelines with idempotent charge paths, processor timeouts and retries, webhook handling, and automated reconciliation
• Build audit trails for payments and refunds
• Respond to payment incidents, perform root cause analysis, and implement structural fixes
• Partner with Customer Success on the payments support queue and turn recurring tickets into product fixes
• Write clean, testable, high-performance Kotlin and Java code using Spring Boot
• Design and implement scalable production APIs
• Refactor and extend services to improve reliability and maintainability
• Design and optimize PostgreSQL schemas and tune SQL for large data volumes
• Participate in Agile/Scrum design reviews, code reviews, and architectural discussions
• Collaborate with product, frontend, and Customer Success on billing and payments features
• Mentor engineers through code reviews and share context to avoid knowledge silos

Senior Backend Engineer, Payments