Sr Backend Engineer, Billing

Software powers the world, and LaunchDarkly empowers teams to deliver and control it safely. As a Senior Backend Engineer on the Billing team, you will own the systems that turn every plan, price, entitlement, and usage limit into revenue — checkout, subscription and entitlement APIs, usage metering, and the integrations to our billing, CRM, and finance systems. When billing is wrong, customers get the wrong product and we invoice the wrong amount. Correctness here is a commitment to our customers, not a nice-to-have.

You and your team will drive the modernization of our billing platform. Technologies include Go, TypeScript, Postgres, AWS, and Terraform. Exact tool match matters far less than deep backend judgment and a track record of safely changing systems that are not allowed to be wrong.

• Design and build the systems that define our plans, pricing, entitlements, and limits, and expose them through our API.

• Decompose billing from our monolith into services that are correct, testable, and independently deployable.

• Own correctness end to end — usage metering, reconciliation, and the invoices and usage data customers see.

• Operate what you build: SLOs, alerting, on-call, and fixing root causes rather than repeating mitigations.

• 6+ years of professional software-engineering experience, with significant work on complex backend applications.

• Experience decomposing a monolith

• A track record on systems where correctness is non-negotiable, and the habits that come with it: idempotency, reconciliation, reversible migrations, and safe cutovers.

• Proficiency in at least one backend language (Go, Rust, Python, etc.) and familiarity with cloud infrastructure (AWS or equivalent), plus strong production ownership including on-call.

Bonus

• Billing, payments, or metering systems, or usage-based pricing.

• Modeling entitlements, quotas, or multi-tenant limits.

Target pay ranges based on Geographic Zones* for Level 4:

• Zone 1: San Francisco/Bay Area or NYC Metropolitan Area, Boston, Seattle - $191,800 - $263,670**

• Zone 2: Irvine, LA, Monterey, Santa Barbara, Santa Rosa, Austin, Portland, Philadelphia, Chicago - $172,600 - $237,270**

• Zone 3: All other US locations - $163,000 - $224,070 **

LaunchDarkly operates from a place of high trust and transparency; we are happy to state the pay range for