Senior Software Engineer - Tax Platform

Rippling's Tax Platform is one of only ~5 companies globally that owns the full tax calculation and filing stack. We process over $30 billion in annual payroll for 1 million+ employees—growing 50% year-over-year. Our systems handle millions of payroll transactions across multiple countries, ensuring tax correctness across 4,000+ jurisdictions while staying compliant with constantly changing tax regulations.

We're looking for a Senior Software Engineer who takes ownership of complex problems, designs robust systems, and delivers high-quality solutions that directly impact millions of tax calculations.

You'd be joining one of only ~5 companies in the world that owns the full tax stack. ADP took 70+ years, Paychex 50+ years, Paycom 25+ years—Rippling built it in 10. Everyone else licenses from vendors. At Rippling, you own the engine.

Real-time at scale : Sub-second tax calculations for payroll preview, batch processing of millions of records at month-end, with perfect consistency across retries

Integration complexity : Filing to thousands of agencies via PDF, XML, fixed-width files, SFTP, web portals, APIs—and yes, some still require paper mail

Testing without ground truth : No "tax oracle" exists; you'll build validation systems for millions of edge cases across 50 states × 12 months × multiple entity types

Historical accuracy : Must calculate taxes using rules from any past date as regulations constantly change

Building an AI-Driven Global Tax Engine with explainable AI for full audit defensibility

Massive System Scaling to support 100x current volume and enterprise-grade companies

Expanding International Support to 20+ countries, each with unique tax systems

Building Distributed Transactional Systems handling $100B+ in tax payments

Automating Tax Filing to minimize manual intervention at scale

FQL (Filing Query Language) : Our proprietary DSL encoding tax rules across 4,000+ jurisdictions

Real-time Tax Calculation : Sub-second calculations at scale with perfect consistency

AI-Powered Compliance Engine : Multi-model validation with human-in-the-loop

5+ years of software engineering experience

Strong system design skills with experience building distributed, high-reliability systems

Proficiency in Python; experience with Django or similar frameworks that follow the MVC pattern (layered architecture).

Track record of owning and delivering impactful projects autonomously

Rigorous approach to correctness—you write tests, handle edge cases, and think about failure modes

Ability to navigate ambiguity and drive clarity in complex problem spaces

Clear communication and ability to influence technical decisions

Experience in fintech, payroll, or tax domains

Background in compliance-critical systems where correctness is paramount

Experience with domain-specific languages or rule engines

Familiarity with MongoDB, Temporal, or event-driven architectures

Languages : Python, FQL (proprietary tax DSL), Go

Framework : Django, MongoEngine

Database : MongoDB, Redis, PostGre

Infrastructure : AWS, Kubernetes, Temporal

Observability : Buildkite, Datadog, Sentry

Rippling gives businesses one place to run HR, IT, and Finance. It brings together all of the workforce systems that are normally scattered across a company, like payroll, expenses, benefits, and computers. For the first time ever, you can manage and automate every part of the employee lifecycle in a single system.

Take onboarding, for example. With Rippling, you can hire a new employee anywhere in the world and set up their payroll, corporate card, computer, benefits, and even third-party apps like Slack and Microsoft 365—all within 90 seconds.

Based in San Francisco, CA, Rippling has raised $1. 8B+ from the world’s top investors—including Kleiner Perkins, Founders Fund, Sequoia, Greenoaks, and Bedrock—and was named one of America's best startup employers by Forbes.

We prioritize candidate safety. Please be aware that all official communication will only be sent from @ Rippling.com addresses.