Payment & Billing Systems Engineer

This is a remote position.

Our client is looking for a Payment & Billing Systems Engineer to take full ownership of their payment infrastructure and ensure reliability across their subscription-based platform. They operate within the tech and digital product space and have recently scaled their platform capabilities, supporting a growing global user base through subscription-driven services.

This role sits at the core of their revenue engine. Payment accuracy, subscription logic, and billing reliability directly impact both user experience and business performance, making this one of the most critical positions on the team.

Responsibilities

Take full ownership of the payment ecosystem, including Authorize.net as the primary processor and cryptocurrency payment integrations

Architect and manage the full subscription lifecycle, including activations, plan changes, cancellations, suspensions, and recovery flows

Develop robust webhook handling systems with strong guarantees around idempotency, retries, and event sequencing

Build and maintain billing reconciliation processes across multiple intervals, ensuring financial accuracy and traceability

Design workflows for refunds, disputes, and chargeback handling

Implement automated testing strategies, including integration and end-to-end tests for payment and subscription flows

Introduce fraud prevention mechanisms and enforce rate limiting on payment-related endpoints

Ensure compliance with payment security standards and best practices, including PCI-related requirements

Requirements

Proven, hands-on experience working directly with Authorize.net in production environments (Accept Suite, AIM, ARB, CIM, or Transaction APIs)

Experience building a complete payment system from scratch that processes real user transactions

Minimum of 3 years developing payment or billing systems in live environments

Deep understanding of subscription lifecycle management and complex edge cases

Strong experience with financial reconciliation processes and audit tracking

Solid backend engineering skills using Node.js and TypeScript

Experience with asynchronous workflows or job orchestration tools

Qualifications

Familiarity with distributed systems and handling failure scenarios in payment flows

Experience working with PostgreSQL and Redis

Exposure to Temporal or similar workflow orchestration tools

Understanding of crypto payment integrations (Solana, Ethereum, Polygon) is a plus

Knowledge of NestJS and PCI-DSS standards is considered an advantage

Benefits

Full-time, 100% remote opportunity

Work on a high-impact system directly tied to company revenue

Exposure to cutting-edge technologies including Web3 payments

Opportunity to own and scale a critical infrastructure component

Collaborative, engineering-driven environment with strong technical ownership

Originally posted on Himalayas