About Your New Role
We’re seeking a Billing Systems Developer to build and scale the financial systems that power Command|Link’s platform. This role sits at the intersection of engineering, finance, and data, ensuring billing is accurate, resilient, and fully auditable across a global customer base.
You’ll own key components of billing, from invoicing and payments to reconciliation and reporting, where precision and reliability are critical.
Key Responsibilities
* Design and develop scalable billing systems (invoicing, usage-based billing, credits, taxes, proration)
* Build and maintain ledger-based financial systems with full auditability
* Integrate with payment gateways (Stripe, ACH, etc.)
* Ensure idempotent processing to prevent duplication and inconsistencies
* Develop reconciliation workflows to detect and resolve discrepancies
* Architect resilient systems with retry, rollback and recovery mechanisms
* Optimize and manage large financial datasets, including historical data
* Build and maintain APIs for billing services
* Debug complex production data issues and support safe data migrations
* Partner with finance, product, and engineering teams to evolve billing logic
* Takes on additional responsibilities and projects as needed to support the success of the team and organization.
What You'll Need For Success
Core Engineering
* Strong experience with PHP and/or Go
* Proficiency in MySQL (joins, indexing, performance tuning)
* Comfortable in Linux/Unix environments (Bash, command line)
* Experience with Git
Financial Systems
* Experience with billing, payments or financial transactions
* Understanding of double-entry / ledger-based systems
* Knowledge of taxes, proration, credits, and adjustments
* Familiarity with payment processors (Stripe, ACH)
Data & System Design
* Strong grasp of data integrity, ACID principles and concurrency
* Experience with audit trails, traceability and reconciliation
* Background in event-driven or queue-based architectures
* Experience designing APIs and evolving system logic over time
Operations & Security
* Strong debugging skills, especially with production data issues
* Experience with cron jobs / scheduled processing and data migrations
* Awareness of secure financial data handling, PCI, and RBAC
Benefits
* Room to grow at a high‑growth company
* An environment that celebrates ideas and innovation
* Your work will have a tangible impact
* Flexible time off
* Fun events at cool locations
* Employee referral bonuses to encourage the addition of great new people to the team
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