---
title: 'Senior Account Executive at Antithesis'
canonical: 'https://feeny.ai/job/senior-account-executive-antithesis-london-8d58r1k462g7'
type: 'job'
last_seen: '2026-09-06'
---

# Senior Account Executive at Antithesis

- **Company:** Antithesis
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-02-07
- **Last confirmed live:** 2026-09-06
- **Apply:** https://jobs.ashbyhq.com/antithesis/21f751bc-f68b-4fe7-b4c5-ba3667ae1665/application

**Skills:** Enterprise B2B SaaS Sales, Developer Tools Sales, Pipeline Management, Sales Engineering, Technical Product Demonstrations

> The Senior Account Executive drives enterprise sales cycles for developer tools, targeting technical customers and leadership. The role involves managing a book of business, engaging with stakeholders, and mentoring junior staff within a fast-paced startup environment.

## Job description

## ABOUT THE SENIOR ACCOUNT EXECUTIVE POSITION

Antithesis is looking for Senior Account Executives with experience selling developer tools to highly technical customers, from senior engineers to C-level engineering leadership.

As a Senior Account Executive, you will report either to a Regional Sales Leader or directly to the VP of Sales, depending on location. You will work closely with customers, prospects, and internal teams to drive adoption of Antithesis’s technology. Occasional travel is expected, as is a willingness to contribute beyond a narrow role definition in a startup company.

AS A SENIOR ACCOUNT EXECUTIVE AT ANTITHESIS, YOU WILL:

- Run complex enterprise sales cycles end-to-end, from prospecting through close.
- Own and proactively manage your book of business with a high degree of accountability.
- Engage senior engineers, engineering leaders, and executives in technical and business-focused sales conversations.
- Help define and refine Antithesis’s customer qualification criteria and sales process as the company scales.
- Represent the voice of the customer in product discussions with engineering and product teams.
- Drive successful customer adoption by clearly articulating value, ROI, and integration considerations.
- Mentor new Account Executives and contribute to a strong, collaborative sales culture.
- Partner with marketing to refine messaging and sales materials based on market feedback.

OUR IDEAL SENIOR ACCOUNT EXECUTIVE WILL:

- Have 5+ years of experience in enterprise B2B SaaS sales, with direct experience selling developer tools or similarly technical products.
- Bring native-level German-speaking skills, in addition to English.
- Demonstrate a consistent track record of exceeding quota.
- Be highly motivated, proactive, and comfortable owning pipeline creation and deal execution.
- Possess strong technical acumen and communicate effectively with both technical and executive stakeholders.
- Thrive in a fast-paced startup environment with evolving processes.
- Have prior experience in Sales Engineering or technical product demonstrations (preferred).

## 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

- [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
- [Senior Field Marketing Manager](https://feeny.ai/job/senior-field-marketing-manager-antithesis-london-dmrqcddt9zag) — London, United Kingdom
- [Solutions Engineer](https://feeny.ai/job/solutions-engineer-antithesis-japan-29kecs9h5627) — Japan
- [Commercial Counsel](https://feeny.ai/job/commercial-counsel-antithesis-vienna-va-0kct260wrmdb) — Vienna VA, United States
- [Solutions Engineer](https://feeny.ai/job/solutions-engineer-antithesis-singapore-f3w7ev2b0rja) — Singapore