Antithesis Operations LLC

Antithesis Operations LLC is seeking a developer based in London to help build 'Hegel', an innovative set of property-based testing libraries. The role requires experience with property-based testing and familiarity with Python and Rust. This in-office position values collaboration and high engineering standards across a diverse team. Candidates should be comfortable working with AI assistance and maintaining quality in software development. This job is a fantastic opportunity to contribute to open source and work on cutting-edge technology.

About Antithesis Antithesis helps engineering teams find and fix bugs that traditional testing misses. Our platform runs entire systems in a deterministic simulation, breaks them in every imaginable way, and provides engineers with root cause analysis and perfect reproduction. The result is faster debugging, more reliable software, and more confidence in what ships. As AI accelerates software development, the need for reliable verification is only increasing. Antithesis exists to solve that problem. We are well-funded, deeply technical, and building a category-defining platform for modern software reliability. About the Role We are looking for a highly motivated and hands on BDR Manager to build, coach, and scale our outbound pipeline generation function in EMEA. This is an opportunity to join a rapidly growing company at a pivotal stage and play a critical role in defining how Antithesis engages prospective customers in the region. As BDR Manager, you will lead a team of Business Development Representatives responsible for creating a pipeline of qualified client prospects. You will develop outbound strategies, establish repeatable processes, mentor early career sales talent, and partner closely with Sales, Marketing, and Revenue Operations to drive growth. The ideal candidate combines strong people leadership with a passion for outbound prospecting, operational excellence, and a data driven approach to pipeline generation. This is an 5 days a week in office job in London. What You'll Do Manage and coach a team of BDRs to consistently meet or exceed qualified opportunity goals. Be a source of energy and accountability. Create a culture of excellence and continuous improvement on your team. Provide actionable coaching focused on conversation quality, objection handling, and messaging alignment. Provide high impact 1:1 coaching to a group of BDRs focused on driving pipeline generation in new verticals. Guide them through LinkedIn, email, and cold call strategies that drive high quality meetings for our AE teams. Identify patterns in high performing outreach and scale winning tactics to drive better conversion rates across the team. Design and refine BDR outreach sequences and cadences to optimize contact and conversion rates. Work closely with the Director of Business Development to build targeted prospecting campaigns aligned to key verticals and personas. Who You Are 3+ years of experience in a Business Development role within a B2B SaaS environment, with at least 18+ months in a leadership role managing teams of 5+ sales reps. Proven track record of coaching SDRs 1:1 and leading training across cold calls, email, and LinkedIn outreach. Deep understanding of outbound sales strategies and how to drive consistent conversion from prospecting to qualified opportunity. Familiarity with tools like Salesforce, Outreach, Gong and LinkedIn Sales Navigator plus awareness of new tools/integrations/AI use cases to improve BDR efficiency. Strong written and verbal communication skills, can articulate value propositions, and give actionable feedback to BDRs. A motivating presence: you uplift those around you, create accountability, and lead by example. Comfortable operating in a fast paced, ambiguous environment where experimentation and adaptability are key. Preferred Qualifications Bachelor's degree or equivalent Self starter with developed interpersonal and organizational skills Results oriented and prepared to work in a fast paced environment Ability to understand deeply technical concepts

Antithesis Operations LLC is seeking an IT Engineer to enhance our IT infrastructure in the UK. This role is crucial to support engineers, manage endpoints, and maintain network systems. You'll own the technology processes, ensuring smooth operation. Ideal candidates have hands-on experience in IT systems administration, solid knowledge of macOS and Linux, and familiarity with modern endpoint management tools like Mosyle. Join us to have a significant impact on our engineering operations.

About Antithesis We've been quietly reinventing how the world thinks about software reliability, and we're just getting started! At Antithesis, we start at the foundations - we run entire software systems inside a deterministic simulation and break them in every way imaginable. Every issue then comes with a perfect reproduction, so you can identify root causes fast instead of spending days trying to recreate what went wrong. The rise of AI-generated code has made this work more urgent than ever. Agents can write code faster than any human, but speed doesn't matter much when the output is buggy, stuck in review, or slipping through undetected. The verification bottleneck is real, it's growing, and solving it is one of the most consequential problems in software right now. That's what you'd be working on. We're well-funded and deeply technical, the kind of place where the hardest problems get the most attention and the best ideas win regardless of who has them. If you want to do work that actually moves the needle on how reliable software can be, keep reading. About This Role Antithesis is looking for an IT Engineer to drive and evolve our IT infrastructure as we scale in the UK. You'll be the person our engineers rely on to keep their environments running, their access managed, and their issues resolved quickly. This role sits at the intersection of endpoint management, network infrastructure, and internal tooling, and you'll have real ownership over the systems and processes you build. Day to day, you'll manage our Mac and Linux fleet using Mosyle and Apple Business Manager, support our network and VPN infrastructure, and serve as our primary escalation point for endpoint and application issues. You'll also help build the documentation and operational foundations that let us move fast without losing institutional knowledge. This is a hands-on role for someone who likes solving technical problems, working across teams, and building things that last. If you thrive in fast-moving environments and want to have a meaningful impact on how a rapidly growing engineering company operates, we'd love to talk. What You'll Do Manage and support our technology using tools like Mosyle and Apple Business Manager, keeping hardware and software environments running smoothly across the company. Maintain network infrastructure including VPNs, DNS, firewalls, and wireless systems, collaborating with engineering and other teams to keep things reliable and secure. Serve as Tier 1 and Tier 2 support for endpoint, network, and application issues, tracking and resolving problems through Linear with a focus on fast resolution. Own asset management and security compliance, maintaining accurate records in our corporate asset database and ensuring we're meeting relevant compliance frameworks. Build and maintain documentation on IT processes, configurations, and architecture so knowledge is shared and the team can scale without losing institutional context. What We're Looking For Hands-on experience in IT systems administration or a similar role, ideally in a fast-paced or high-growth tech environment. Strong working knowledge of macOS and Linux (Ubuntu or similar), with familiarity with NixOS and modern endpoint management tools. Experience with identity and access management platforms like Google Workspace, Okta, or Azure AD. Solid networking fundamentals, including DNS, DHCP, firewalls, VLANs, and wireless infrastructure. Clear communicator who documents well, troubleshoots methodically, and takes ownership of problems through to resolution. Nice to Haves: Experience working in a dynamic start-up environment working with complex systems Global experience supporting team members in other countries including the US & Asia