Senior Software Engineer (Agentic Search) - Billing

Tavily • New York City, NY

3d • Hybrid

About The Position

Tavily is building the infrastructure layer for agentic web interaction at scale, with an API designed to power Retrieval-Augmented Generation (RAG) and real-time reasoning in AI systems. They connect LLMs to high-quality web content, enabling developers to build informed AI agents. The company works with innovative AI teams, from startups to large enterprises, powering various AI applications. This role focuses on designing and building the billing platform for a novel search engine tailored for agentic AI consumption, handling millions of developer API users and their consumption-based payments. The engineer will be responsible for turning product usage into accurate revenue, supporting flexible billing models including usage-based pricing, subscriptions, prepaid balances with auto top-up, and enterprise contracts. Correctness is paramount, ensuring precise measurement of every event and accurate invoicing.

Requirements

• 6+ years building production backend systems, of which 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: worked on 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

Nice To Haves

• Led a billing system migration or re-platform with zero revenue loss or downtime
• Built hybrid billing combining usage, subscriptions, and prepaid in one system
• Worked across both a payments layer (Stripe) and a metering / rating layer (Metronome / Orb)
• Billed a developer-facing / API product with pay-as-you-go and API-key metering
• Used Snowflake for usage aggregation and revenue analytics

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)

Benefits

• Health insurance: 100% company-paid medical, dental, and vision coverage for employees and families.
• 401(k) plan: Up to 4% company match with immediate vesting.
• Parental leave: 20 weeks paid for primary caregivers, 12 weeks for secondary caregivers.
• Remote work reimbursement: Up to $85/month for mobile and internet.
• Disability & life insurance: Company-paid short-term, long-term and life insurance coverage.
• Competitive compensation and benefits packages.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed