---
title: 'Payroll & Accounts Payable Manager at Antithesis'
canonical: 'https://feeny.ai/job/payroll-accounts-payable-manager-antithesis-vienna-va-63sva198ppts'
type: 'job'
last_seen: '2026-09-13'
---

# Payroll & Accounts Payable Manager at Antithesis

- **Company:** Antithesis
- **Location:** Vienna VA, United States
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-09-07
- **Last confirmed live:** 2026-09-13
- **Apply:** https://jobs.ashbyhq.com/antithesis/b9354389-4809-4fa3-9c7d-16dc0b2b2133

## Job description

## About Antithesis

We build a platform that finds the bugs other testing approaches never see. Antithesis runs your entire system inside a deterministic simulation, breaks it in every way we can think of, and hands you a root cause with a perfect reproduction — no flaky tests, no false positives, no "works on my machine." Engineering teams debug faster and ship with far more confidence. AI-generated code has made this work more urgent than ever. Agents write code faster than any human can, but faster code isn’t better code if it’s buggy, stuck in review, or quietly failing in production. The verification bottleneck is real, and it’s growing. That is precisely the problem Antithesis exists to solve. We’ve spent years quietly rethinking how the world approaches software reliability, and we’re just getting started. We’re well-funded, deeply technical, and headquartered in Northern Virginia with satellite offices in London and San Francisco. Our team is in the office daily, which is how we take on hard problems together. If that sounds like fun to you, keep reading.

## About the Role

Antithesis is looking for someone to own payroll and accounts payable as we scale. You'll keep employees paid accurately and on time, vendors paid to terms, and our expense processes clean while building the infrastructure that will support a much larger company. This role sits at the operational center of finance. We run lean, so the work is hands-on. You should be comfortable managing competing deadlines, handling sensitive data, and improving process without being asked. We're in the office daily in Vienna, VA.

## What you'll do

- Process payroll for a multi-state workforce, accurately and on time
- Manage accounts payable end-to-end: invoice intake, approval routing, payment execution, and reconciliation
- Administer the employee expense reimbursement process and corporate card program
- Support benefits administration in coordination with HR
- Maintain payroll records and prepare reports for audit, tax, and internal purposes
- Stay current on state and local payroll tax compliance as we add employees in new jurisdictions
- Identify and drive improvements to payroll and AP systems and workflows

## What we're looking for

- 3+ years of payroll and accounts payable experience, ideally at a tech or growth-stage company
- Experience with payroll platforms (Rippling, Gusto, ADP, or similar) and accounting systems (NetSuite preferred)
- Working knowledge of multi-state payroll tax requirements
- High bar for accuracy and ability to handle confidential information with discretion
- Organized and deadline-driven
- Process-oriented: you look for ways to make things better, not just keep them running

## About Antithesis

## Company Overview
- **One-liner**: Antithesis provides an autonomous software testing platform that uses deterministic simulation and state space exploration to exhaustively find and reproduce bugs in complex, distributed systems.
- **Entity Type**: Private (Series A)
- **Headquarters**: Vienna, Virginia, United States (with satellite offices in London, UK and San Francisco, California)
- **Founded**: 2018
- **Founders**: Will (CEO), Ben (CTO), and Dave (co-founder) – full last names not publicly disclosed

## Core Business
- **Primary industry/industries**: Software testing, autonomous reliability, developer tools, infrastructure software
- **Target customers**: B2B, Enterprise – companies building complex distributed systems (e.g., databases, cloud infrastructure, fintech, blockchain)
- **Mission or purpose statement**: “De‑risk agentic development of critical systems” by exposing bugs without human review, false positives, or risking production.

## Products & Services
- **Antithesis Platform**: A SaaS/on‑prem platform that runs a customer’s complete system in a fully deterministic, ephemeral simulation. It exhaustively analyzes behavior using fuzzing and state space exploration, automatically exposes bugs, provides a root cause and perfect reproduction, and arms developers (including AI agents) with high‑signal correctness feedback.

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metric**: Total Funding – $182 M (latest round: $105 M Series A announced December 3, 2025)
- **Notable Investors/Partners**: Amplify Partners, Spark Capital, Tamarack Global, Patrick Collison, Sholto Douglas, and 31+ other investors. Customers include Jane Street, MongoDB, Confluent, and Tigris Data.
- **Growth Signals**: Launched out of stealth in 2024; 19 open job openings as of mid‑2026; customers report 40 × faster change verification, 10 × faster time‑to‑release, and discovery of severe bugs missed by all other testing.

## Competitive Advantages
- **Deterministic replay** of every bug found – eliminates the “cannot reproduce” problem.
- **Exhaustive state space exploration** that catches unknown unknowns without false positives.
- **Runs the entire system** (not unit/integration tests) – simulates production‑like conditions.
- **Already trusted by elite engineering teams** (e.g., quantitative trading firm Jane Street, leading database companies) – a strong reference moat.

## Strategic Focus
- Accelerate product innovation and expand support for **agentic development** – help AI agents build bug‑free code by providing high‑signal correctness feedback.
- Broaden platform coverage across **databases, cloud infrastructure, fintech, blockchain**, and other critical system domains.
- Scale go‑to‑market and customer success teams to meet enterprise demand.

## Why Work Here
- **Culture**: “Collaborative, highly technical, and customer‑focused” – deep‑tech environment solving hard distributed‑systems problems.
- **Work policy**: In‑office daily (Vienna, London, or San Francisco) to facilitate tackling difficult challenges together.
- **Perks & engineering culture**: Well‑funded startup with a long‑term mindset; team includes veterans from FoundationDB, Apple, Google, and MongoDB; emphasis on autonomy, technical excellence, and fun.
- **Interview process**: Transparent and respectful – they publish a “No Ghost Policy” and welcome unsolicited applications from talented candidates.

## Sources
1. [antithesis.com – Careers](https://antithesis.com/company/careers/)
2. [antithesis.com – Homepage](https://antithesis.com/)
3. [antithesis.com – Leadership](https://antithesis.com/company/leadership/)
4. [cbinsights.com – Antithesis Company Profile](https://www.cbinsights.com/company/antithesis)
5. [theconsensus.dev – Antithesis Profile](https://theconsensus.dev/company/antithesis.html)

## Other roles at Antithesis

- [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-antithesis-singapore-yq3hxpy63bs0) — Singapore
- [Finance Systems & Operations Manager](https://feeny.ai/job/finance-systems-operations-manager-antithesis-vienna-va-rtryqp5eanrf) — Vienna VA, United States
- [Billing & Revenue Ops Manager](https://feeny.ai/job/billing-revenue-ops-manager-antithesis-vienna-va-kgrgmtb99spj) — Vienna VA, United States
- [Senior Accountant](https://feeny.ai/job/senior-accountant-antithesis-vienna-va-4na1bqhbceq2) — Vienna VA, United States
- [Applied AI Software Engineer, GTM](https://feeny.ai/job/applied-ai-software-engineer-gtm-antithesis-vienna-va-62xsbyyvcham) — Vienna VA, United States
- [Business Development Representative](https://feeny.ai/job/business-development-representative-antithesis-london-rtkspzmp2mrj) — London, United Kingdom
- [Senior Account Executive - Chicago](https://feeny.ai/job/senior-account-executive-chicago-antithesis-chicago-ef0mxxhzyfms) — Chicago, IL
- [Manager, Solutions Engineering](https://feeny.ai/job/manager-solutions-engineering-antithesis-london-c6ewnhykc1eg) — London, United Kingdom
- [Senior Backend Engineer](https://feeny.ai/job/senior-backend-engineer-antithesis-vienna-va-jdqgt1frp84e) — Vienna VA, United States
- [Senior Systems Engineer, Database](https://feeny.ai/job/senior-systems-engineer-database-antithesis-vienna-va-j7cxe4t6m83p) — Vienna VA, United States