Tax Systems Engineer

SystemsAccountants is partnering with a high-growth technology company to hire a Tax Systems Engineer. This is a foundational hire on a small Tax Technology team within Finance Systems, and a rare chance to shape how tax technology scales alongside a rapidly expanding business. About the Role This role is the technical backbone of the tax function. You will design and build the integrations, tooling, and production code that connect tax systems to ERP, billing, CRM, EPM, and data warehouse platforms, so that every revenue and purchasing flow is taxable and auditable from day one. Working closely with the Tax Technology Lead, you will partner with Tax, Finance, IT, Data, Billing Engineering, and Product to translate tax and business requirements into scalable technical solutions. The scope spans the full tax landscape, including indirect tax, corporate income tax and provision, withholding, R&D credits, and transfer pricing. Over time, the role will take on increasingly ambitious work, including using AI to automate tax processes end to end and building internal products that give the tax team self-serve access to data, calculations, and evidence. Key Responsibilities Design, build, and support integrations between tax systems and ERP, billing and invoicing, CRM, EPM and FP&A, data warehouse, and other business-critical applications Own tax-related changes within the billing environment and the connection between billing and the tax engine, including withholding tax considerations Lead technical delivery of an AP tax engine implementation across ERP-connected purchasing flows, covering data migration, integration pipelines, parallel-run reconciliation, e-invoicing, and go-live validation Build and maintain interfaces using APIs, middleware, integration platforms, and file-based methods Develop tax-specific tooling for indirect tax reconciliations, provision and research credit data pipelines, transfer pricing datasets, withholding tracking, and exemption validation Build SOX-aware controls on tax data flows, including control totals, source-to-target tie-outs, and evidence pipelines that hold up to external audit Troubleshoot data discrepancies, integration errors, and performance issues across systems Serve as technical owner through vendor implementations, from build through post go-live support Maintain clear documentation of system architecture, interfaces, data mappings, and integration processes Help establish best practices for integration architecture, monitoring, testing, and support as new products and jurisdictions come online Qualifications Hands-on experience building or owning production integrations with billing platforms, ERPs, or enterprise tax and finance systems Working knowledge of at least one tax systems domain, such as indirect tax engines, corporate tax provision or compliance, withholding, research credit, or transfer pricing, gained at a tax technology practice, tax software vendor, or in-house tax systems team Proficiency writing production-grade Python with strong testing and code review habits Strong SQL skills for building reconciliations and validating data end to end Experience building or operating SOX-aware data flows, such as IPE, control totals, or documented and testable pipelines Ability to translate business and tax requirements into technical specifications Confidence working directly with vendors, auditors, engineers, and tax stakeholders Strong communication and documentation skills, with the ability to work independently in a fast-moving environment Nice to Have 7+ years in tax technology, finance systems engineering, or a closely related field Experience with warehouse and analytics engineering tools such as dbt or BigQuery Breadth across multiple tax domains, including sales and use, VAT/GST, provision, withholding, research credit, and transfer pricing Experience building with LLMs or applying AI to finance or tax work Exposure to marketplace, usage-based, or platform billing models Experience taking over vendor-built systems and hardening them for long-term ownership UAT design and change management experience on finance systems implementations Experience building internal tools for non-technical finance or tax users Location: San Francisco, New York City, or Seattle (hybrid) Relocation: Package available for relocation to San Francisco Compensation: $205,000 to $270,000 base salary plus equity #J-18808-Ljbffr SystemsAccountants Inc.