---
title: 'Commercial Counsel at Antithesis'
canonical: 'https://feeny.ai/job/commercial-counsel-antithesis-vienna-va-0kct260wrmdb'
type: 'job'
last_seen: '2026-09-13'
---

# Commercial Counsel at Antithesis

- **Company:** Antithesis
- **Location:** Vienna VA, United States
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-08-03
- **Last confirmed live:** 2026-09-13
- **Apply:** https://jobs.ashbyhq.com/antithesis/3af20247-e30b-4868-a4a4-b0710613abe1

## 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 a transactional lawyer to serve as a key legal partner to the business as we grow. In this role, you will lead negotiation and counseling on customer and revenue-related transactions, advise on commercial risk, maintain contract templates and playbooks and help shape a pragmatic legal approach that supports the company’s goals.

This role is well suited for someone who enjoys supporting a sales team in a fast-paced environment where your efforts can have an immediate impact for your client. . You should be comfortable handling complex commercial matters, partnering with senior stakeholders, and balancing speed, judgment, and rigor in a fast-moving environment.

## What you'll do

- Draft, review, and negotiate a wide range of commercial agreements, including SaaS agreements, partnership agreements and vendor contracts
- Advise internal teams on contract structure, commercial terms, risk allocation, and negotiation strategy
- Partner with sales, finance, product, security, and leadership on large transactions and customer-facing legal issues
- Create and refine templates, playbooks, approval paths, and internal policies that improve consistency and speed
- Support escalations on high-impact deals and help drive resolution on difficult contractual issues
- Spot trends in negotiation friction and recommend improvements to process, positioning, and standard terms
- Provide business-focused legal advice that enables thoughtful decision-making across the company
- Conduct training for internal business partners

## What you'll do

- J.D. and active bar membership in at least one U.S. jurisdiction
- 5 - 8 years of technology-focused contracting in law firm or in-house roles and at least 3+ years supporting sales teams
- Significant experience handling commercial transactions, ideally with a mix of customer-facing SaaS agreements and with some vendor-side contracting
- Strong sense of deal ownership and client-focused attitude in supporting a rapidly growing sales team
- Experience negotiating complex agreements, including Master Service Agreements, Data Processing Agreements, marketing agreements and partnership agreements, with sophisticated counterparties.
- Excellent judgment and an interest in building processes to enable the company to grow, while balancing risk and opportunity in a fast moving environment.
- Ability to work independently while collaborating closely with cross-functional partners
- Strong attention to detail without losing sight of the broader business context.

## 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)

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