Backend Engineer – Billing

PostHog

full-time

Posted on: 2/12/2026

Location Type: Remote

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About the role

Scaling our billing system to $100M+ revenue (the hundy) by the end of 2026, and well beyond (the billy?).
Building billing primitives flexible enough that launching a new pricing model doesn't require rearchitecting everything.
Making our usage reporting and limiting near-realtime.
Turning usage and messy raw invoice data into actionable internal reports, accurate forecasts, and compliant financials.

Strong backend engineer. Python, SQL, and complex data modeling should feel like home.
Experience with data pipelines, task queues, and workflow orchestration - we still have a lot of Celery but are leaning more into Temporal and Dagster.
If you've done something manually twice (or seen someone else do it) - you're already building an automation or an internal tool to make it easier.
Happy paths are maybe 10% of billing. You treat error handling, rollbacks, and retries as the actual work - not TODOs you'll "get to later".
You don't need someone to tell you what to build. You've started a company, led a major project from scratch, or shipped an impressive side project.
You've built and scaled usage-based billing systems before (and have the scars to prove it).
You get weirdly excited about revenue modeling, forecasting and accounting ledgers.

Benefits

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

PythonSQLdata modelingdata pipelinestask queuesworkflow orchestrationCeleryTemporalDagsterautomation

Soft Skills

problem-solvinginitiativeleadershiperror handlingattention to detailproject managementadaptabilitycommunicationcreativityself-motivation