Senior Backend Engineer - Billing Platform for AI Search

Tavily; New York (NY); Hybrid; USD 147,000 - 224,000; Full time

Benefits offered by this job

Health insurance

401(k) plan with match

Parental leave (20 weeks)

Job summary

Tavily is seeking a Senior Software Engineer to build the billing platform behind a novel search engine for agentic AI consumption. This NY-based hybrid role involves turning usage data into accurate invoices and supporting flexible pricing, subscriptions, prepaid balances, and enterprise contracts.

You will own end-to-end billing systems, ensure accuracy, implement revenue safeguards, and push a migration to the next generation with no downtime.

Qualifications

• 6+ years building production backend systems.
• 3+ years actively building and operating billing or metering systems in production.
• Hands-on experience with usage-based / metered billing: rating, aggregation, and proration logic.
• Hands-on experience with subscription / recurring billing alongside usage-based models.
• Hands-on experience with prepaid credits / wallet systems and auto top-up mechanics.
• Hands-on experience with enterprise / contract billing: custom pricing and negotiated terms.
• End-to-end integration of a third-party billing platform (Stripe Billing, Metronome, Orb, or Zuora).
• Strong expertise in Python and TypeScript/Node (Go a plus).
• Production experience with transactional databases (Postgres or equivalent) for financial-grade data.
• Built high-volume event / usage pipelines into a data warehouse (Kafka or Kinesis → Snowflake or BigQuery).
• Owned billing correctness in production: reconciliation, idempotency, invoice accuracy.
• Product-Led Growth (PLG) experience: billing for high-volume, self-serve users.
• Hands‑on with Auth0, Okta, or similar identity systems in production.
• Shipped revenue systems under SOX or financial audit constraints.

Responsibilities

• Design and operate the billing platform end to end, from usage events to invoices.
• Build metering and usage-aggregation pipelines that turn high-volume events into billable amounts.
• Design and operate prepaid credit/wallet systems with auto top-up and balance management.
• Support enterprise/contract billing with custom pricing, negotiated terms, and scheduled invoicing.
• Build reconciliation, idempotency, and invoice-accuracy safeguards to ensure revenue data is always correct.
• Lead the migration to the next generation of our billing system with no revenue loss or downtime.
• Define observability and quality metrics for billing correctness, freshness, and throughput.
• Ensure billing systems meet audit and compliance requirements (SOX, financial audit).

Skills

Python

TypeScript/Node

Go

PostgreSQL

Kafka/Kinesis

Snowflake

Tools

Stripe Billing

Metronome

Orb

Zuora

Auth0

Okta

Job description

Tavily is seeking a Senior Software Engineer to build the billing platform behind a novel search engine for agentic AI consumption. This NY-based hybrid role involves turning usage data into accurate invoices and supporting flexible pricing, subscriptions, prepaid balances, and enterprise contracts.

You will own end-to-end billing systems, ensure accuracy, implement revenue safeguards, and push a migration to the next generation with no downtime.