Billing Systems Developer

Responsibilities

• Design and develop scalable billing systems including invoicing, usage-based billing, credits, and taxes
• Build and maintain ledger-based financial systems with full auditability
• Integrate with payment gateways such as Stripe and ACH
• Ensure idempotent processing to prevent duplication and inconsistencies
• Develop reconciliation workflows to detect and resolve financial discrepancies
• Architect resilient systems with retry, rollback, and recovery mechanisms
• Optimize and manage large financial datasets and historical data
• Build and maintain APIs for billing services
• Partner with finance, product, and engineering teams to evolve billing logic

Requirements

• Strong experience with PHP and/or Go
• Proficiency in MySQL, including joins, indexing, and performance tuning
• Experience with billing, payments, or financial transactions
• Understanding of double-entry and ledger-based systems
• Knowledge of payment processors like Stripe or ACH
• Experience with event-driven or queue-based architectures
• Proficiency with Git and Linux/Unix environments
• Strong grasp of data integrity, ACID principles, and concurrency

Benefits

• Room to grow at a high-growth company
• An environment that celebrates ideas and innovation
• Tangible impact through your work
• Flexible time off
• Fun events at cool locations
• Employee referral bonuses