Staff Software Engineer – Billing & Metering

IonQ•Bothell, WA

5d•$174,520 - $228,492•Hybrid

About The Position

IonQ is seeking a Staff Software Engineer to lead their billing and payments platform integration efforts. This role is crucial for enabling the company to meter and sell its quantum products. The engineer will lead key components of the platform in collaboration with the product team and other engineers, aiming to build the best quantum developer experience for customers and partners.

Requirements

Deep understanding of how to build for correctness and have an instinct for where idempotency, reconciliation, retry logic, and audit trails matter in a billing system
Past experience with building usage-based billing, subscription, and invoice services
Proven experience designing and leading large-scale, cross-team technical projects from inception to completion
Exceptional written and verbal communication skills, demonstrated through a portfolio of technical design documents, architectural diagrams, or public presentations
A strong sense of ownership and the ability to navigate ambiguity to drive complex projects forward with a high degree of autonomy
Familiarity with using AI in day-to-day coding
Bachelor's degree in Computer Science, Engineering or a related field, or equivalent training, fellowship, or work experience
8+ years of professional software engineering experience shipping backend or platform systems in production and 3+ years leading large-scale, complex projects as a tech lead

Nice To Haves

Experience with the operational side of B2B billing or B2C billing
Familiarity with global payment systems, including international tax regulations (VAT, GST), currency conversion, and local payment methods
Worked on revenue reconciliation, financial reporting pipelines, or systems that had to survive an audit
Familiarity with usage-based billing platforms like Metronome
Expertise in programming backends in Go

Responsibilities

Design and implement end-to-end usage-based billing capabilities, utilizing pricing primitives, payment flows, usage tracking, contract and entitlement models, and revenue data pipelines. Know where to extend third-party billing platform integrations and where to build our own primitives around them.
Collaborate with Product and Customer Success teams to translate ambiguous business needs into scalable technical solutions for our next-generation billing system, including expansion into new international markets and supporting Enterprise resellers.
Own the interfaces with third-party billing platforms like Metronome and Stripe as well as our internal dataset for generating invoices and revenue reports.
Perform required manual work like Enterprise contract amendments, pricing config changes, and billing support escalations. A lot of it can be automated by building internal tooling, but some of it still requires human-in-the-loop.
Partner with Finance, Legal, and other stakeholders on compliance-related technical decisions.