Senior Software Engineer I, Backend Account & Billing

POS-26083

About the team

The A&B org owns the central customer-facing hub for subscription and billing management powering over $3 billion in annual recurring revenue. While many teams touch billing A&B is responsible for making Account & Billing the single destination where customers understand what they have manage their subscription and take action.

The Account & Billing Integrations team focuses on the backend foundations that power these experiences: reliable services data models and integrations that enable accurate billing invoices subscription changes usage comprehension and seamless upgrade paths across the broader billing journey.

Why this role matters

A successful Senior Software Engineer on the Account & Billing Integrations team will build and evolve the backend systems that make it easy for customers to understand bills and usage reduce support dependency by expanding self-service coverage and enable cross-functional programs that simplify complex subscription journeys. Youll work end-to-end with collaboration from frontend and product partners.

What youll do

Own major backend domains and services that power the Account & Billing hubAPIs workflows data models and integrationsdelivering high-quality reliable and secure systems.
Align product design frontend and go-to-market partners to solve end-to-end customer problems (e.g. subscription changes billing comprehension seat management policy-bounded self-service).
Ship scalable maintainable backend code (e.g. Java services) with attention to reliability performance observability testing and failure modes.
Translate customer pain points and data into concrete backend improvements that reduce friction (e.g. delta billing marketing contacts limits entitlement/plan changes invoice accuracy).
Expand self-service capabilities by building backend workflows and guardrails so more billing actions are available without human intervention while ensuring changes stay within policy bounds.
Mentor and raise the bar for other engineers on the team through code reviews pairing and shared technical ownership.
Contribute to backend architecture: service boundaries data consistency eventing and safe rollout strategies for enterprise and SMB customers.
Measure outcomes and iterate: partner with PM and analytics to set success metrics instrument services/APIs and act on feedback.

What were looking for

Strong backend experience (typically 5 years) building production services (Java or similar) including API design and operational ownership.
Deep product sensibility: you can reason about end-to-end customer journeys edge cases and how backend behaviour impacts customer comprehension and business outcomes.
Experience delivering end-to-end features and owning backend surface areas (services APIs workflows data migrations instrumentation rollout).
Proven ability to lead cross-team efforts and influence without formal authority.
Solid engineering fundamentals: testing performance reliability observability security/privacy and CI/CD.
Excellent collaboration and communication skills youll work closely with PMs designers frontend engineers customer-facing teams and stakeholders.
Comfortable working in a fast-moving environment and mentoring less-experienced engineers.

About HubSpots Engineering Culture
We empower engineers to own meaningful problems ship iteratively and collaborate deeply across teams. Our culture emphasizes autonomy continuous learning and building for the long term. Whether remote or in-office youll be part of a supportive team where your voice and impact matter.