Senior Backend Engineer

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Taxwire

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2023

💳 Fintech

☁️ SaaS

🤝 B2B

🔥 Funding within the last year

💰 $9M Seed on 2025-08

Fintech • SaaS • B2B

Taxwire is a sales tax platform and managed service that handles sales tax and global VAT end-to-end for companies. It provides an AI-native tax engine for calculating tax (including complex cases like multi-line invoices and products that don't map to standard categories), performs nexus studies, taxability research, registrations, back-filings, filing and remittance across jurisdictions, and offers a managed indirect tax team that makes judgment calls and handles audits. It integrates with billing, commerce, and accounting stacks (QuickBooks, Xero, NetSuite, Shopify, Amazon, etc. ) and exposes APIs for custom setups. Taxwire targets software, e-commerce, and manufacturing customers and emphasizes compliance automation, filings, and audit readiness.

📋 Description

• Design and implement core backend services - including data modeling, compliance logic, and internal platforms that support tax automation at scale. • Build scalable systems to monitor, calculate, and apply transaction taxes across a wide range of jurisdictions and industries. • Develop and maintain our domain model for tax rules, jurisdictions, thresholds, and impositions. • Build automation pipelines for filings, payments, and customer workflows. • Use browser automation, scripting, and task queues to reduce manual work across compliance processes. • Leverage LLMs and programmatic tools to enhance tax research, rule extraction, and error handling. • Collaborate across engineering, tax, and product teams to turn complex policy into scalable software systems.

🎯 Requirements

• 5–10+ years of professional software engineering experience, with a strong focus on backend development. • Strong experience designing systems, services, and data models in complex domains. • Proficiency in our backend stack: Python (FastAPI, Pydantic, pandas, duckdb), Postgres, SQL. Infra runs on AWS. • High attention to detail. Our credibility with customers depends on accuracy and correctness. • Strong communication skills. We’re a writing-first company, and clarity is key in cross-functional work. • A self-starter who can lead projects, make architectural calls, and execute independently. • You’re known for shipping a lot of high-quality code, fast - and taking ownership end-to-end.

🏖️ Benefits

• Company-covered benefits • Meaningful equity