Customer Success Engineer at Antithesis | London

About AntithesisAt Antithesis, we are on a bold mission to transform the landscape of testing and releasing modern distributed systems. Trusted by engineering teams worldwide, our platform guarantees unparalleled reliability, robust performance, and comprehensive technical insights. We understand the challenges developers face, from production outages to release delays caused by elusive bugs. If you share our passion for creating developer-centric solutions that enhance system resilience and accuracy, we invite you to join us.About the RoleAs a Customer Success Engineer (CSE), your role is pivotal in ensuring our customers achieve success. You will dive deep into understanding their complex software systems and pressing business requirements, leveraging our state-of-the-art platform to facilitate rigorous testing of their mission-critical applications. You will collaborate with engineers from innovative companies, identifying bugs before they reach users and contributing to their success.What You’ll DoCustomer Success Engineers must effectively grasp customers’ business goals and technological landscapes to deliver value throughout their journey—from onboarding to customization delivery and presenting impactful value propositions to customer leadership. Your responsibilities will also include identifying product feature gaps, uncovering new requirements, brainstorming novel application domains and product areas, and educating the tech industry on advanced testing techniques for large-scale applications.Every day will bring unique challenges—one day you might be onsite with a customer, resolving a critical bug and presenting findings to their entire team; the next, you’ll collaborate with peers in the office on pioneering testing techniques or enhance your skills by exploring the latest open-source technologies.

About AntithesisAt Antithesis, we are transforming the landscape of modern distributed systems testing and deployment. Our innovative platform is trusted by engineering teams that prioritize unwavering reliability, scalable performance, and intricate technical insights. We don’t just ensure system correctness and reliability; we exist because developers need a superior solution. If you’ve faced the frustration of production outages, endured challenging on-call weeks, or experienced release delays due to critical bugs, you’ll resonate with our mission. If you're driven by a passion for developer-centric products, system resilience, and accuracy, we want to hear from you.About the RoleWe seek an innovative thinker who thrives in challenging environments and isn’t afraid to disrupt the norm. As a Solutions Engineer, you will deploy the powerful tools and technologies from the Antithesis platform to identify bugs and challenge our customers’ software. You will effectively communicate and persuade potential customers about the revolutionary approach to software testing and reliability that Antithesis embodies.What You'll DoLead Proof-of-Concept (POC) initiatives to showcase the value of Antithesis products to prospective customers.Engage in onboarding processes for new customers.Provide technical support to the sales team through qualifications and consultations.Facilitate workshops for customers focusing on Property-based Testing (PBT) and other relevant topics.Identify bugs and evaluate open-source software.Establish thought leadership in testing complex systems.Create, maintain, and present product demonstrations.Guide customers and prospects in utilizing the Antithesis platform and its testing methodologies.Who You AreTechnically adept and curious about technology trends.Eager for new challenges and opportunities.Keen to learn and adopt emerging technologies.Resilient under tight deadlines and high-pressure scenarios.Excellent communicator, both in writing and verbally.Collaborative team player, able to work effectively with a small, skilled team.Professional yet adaptable, comfortable in a fast-paced environment.

About AntithesisAt Antithesis, we are revolutionizing the software testing industry with our innovative approach. Our platform harnesses cutting-edge fuzzing and property-based testing techniques to uncover deep-rooted bugs in customer software, exploring systems in ways that conventional testing methods simply cannot achieve.In the nascent stages of transforming a powerful core technology into a market-ready product, we are defining the intricate aspects of our offering, operational model, and customer engagement processes. This role thrives in a high-ambiguity, 0→1 environment where your product insights will be crucial.About the RoleWe are seeking experienced Product Managers to take ownership of critical components within the Antithesis product suite.This position transcends mere execution within a pre-established framework. You will engage in a dynamic, technical landscape where many decisions will be pioneering. Your role will involve defining product segments, shaping workflows, influencing prioritization, establishing success metrics, and collaborating intimately with engineering and design teams to create robust foundations.You will work alongside engineers in a technically demanding environment where challenges are intricate and trade-offs significant. Your partnership with the engineering team will be essential in determining what we create, the rationale behind it, and the criteria for measuring our success.This position is tailored for individuals eager to build rather than optimize existing processes or mature products.Areas of FocusWe are looking for a product manager based in London to oversee the Property-Based Testing (PBT) and Specification domain. This encompasses, but is not limited to:How customers present their software for Antithesis to test.How customers specify expected and unexpected behaviors of their software.How customers communicate issues that they do or do not prioritize.How customers provide insights on the most compelling areas of their code for exploration.Management of the Antithesis SDK.You will collaborate closely with the Antithesis PBT technical team in our London office, which includes world-renowned experts in property-based testing.What You’ll DoFacilitate discovery sessions with customers to understand their needs.Define and prioritize product initiatives within your domain.Collaborate with engineering to shape the product vision.

About the Role Antithesis is hiring an Engineering Manager in London, UK. This leadership role focuses on guiding engineering projects from planning to delivery. The manager will support a skilled team of engineers, encourage collaboration, and maintain high technical standards. What You Will Do Oversee engineering projects and ensure timely progress Lead and mentor engineers, helping them grow in their roles Promote a collaborative and inclusive team culture Champion technical quality across all projects

Role overview Antithesis is seeking a Senior or Staff Engineer in London, UK to focus on Hegel. The team values creative problem-solving and technical depth, with engineers regularly exchanging ideas and expertise to drive projects forward. Collaboration is a core part of the work culture. What you will do Tackle complex engineering challenges involving Hegel Support both new and ongoing projects that influence the team’s direction Work closely with colleagues to develop practical solutions Requirements Previous experience at a senior or staff engineering level Keen interest in working with Hegel Enjoys sharing knowledge and collaborating with others Motivated to try new technical approaches Location This role is based in London, UK.

About the Senior Account Executive RoleAntithesis is seeking a dynamic Senior Account Executive with a proven track record in selling developer tools to highly technical clients, ranging from senior engineers to C-level executives.As a Senior Account Executive, you will report to either a Regional Sales Leader (West) or directly to the VP of Sales, depending on your location. This position involves close collaboration with customers, prospects, and internal teams to enhance the adoption of Antithesis’s innovative technology. Occasional travel may be required, along with a proactive approach to contribute beyond conventional role definitions in our startup environment.Your Key Responsibilities:Manage intricate enterprise sales cycles from prospecting to closure.Take ownership of your client portfolio with high accountability.Engage in sales dialogues with senior engineers and executive leadership, focusing on both technical and business aspects.Contribute to defining and refining customer qualification criteria and sales processes as we grow.Represent customer interests in discussions with product and engineering teams.Drive successful customer adoption by effectively communicating value, ROI, and integration aspects.Mentor new Account Executives and foster a collaborative sales culture.Collaborate with marketing to enhance messaging and sales materials based on market input.This role emphasizes the FinTech and Financial Services sectors while supporting other enterprise opportunities as necessary.

Join our dynamic team at duffel as a Customer Success Manager in London, where you will play a pivotal role in ensuring our clients achieve maximum value from our innovative travel technology platform. You will be responsible for developing strong relationships with our customers, understanding their goals, and proactively managing their success journey.Your efforts will not only enhance customer satisfaction but will also contribute to the overall growth of our business. If you are passionate about enhancing customer experiences and driving success, we would love to hear from you!

At Kpler, we are committed to guiding our clients through the complexities of global markets. By streamlining trade information and delivering insightful data, we empower businesses in the commodities, energy, and maritime sectors to make informed choices.Since our inception in 2014, our mission has been to provide unparalleled intelligence through intuitive platforms. Our diverse team of over 700 professionals from more than 35 nations work diligently to convert complex data into strategic insights, ensuring our clients maintain a competitive edge in a fast-evolving market. Join us to harness cutting-edge innovation for transformative results and experience exceptional support on your path to success.As a Customer Success Manager at Kpler, you will play a pivotal role in helping customers realize their objectives. This will require a deep understanding of user needs and comprehensive knowledge of Kpler's offerings. Every day presents new challenges and opportunities for a Kplerian CSM!

Our Mission & Values:At Drata, we empower organizations to build and maintain the trust of their users, customers, partners, and prospects. We serve as the proof layer demonstrating that exceptional companies are worthy of the trust they seek to cultivate.Our core principles guide our actions daily. Built on Trust emphasizes the importance of consistency. We Act with Integrity by adhering to ethical standards. Our Customer-Obsessed focus positions those we serve at the heart of our endeavors. With a Competitive Fire, we strive to exceed expectations. Embracing Diversity enriches our perspectives, leading to innovative solutions. Prioritizing Automation First enables us to optimize resources and drive efficiency.Our Culture & Work Style At Drata, we are not merely developing software; we are cultivating a mindset. Our approach is characterized by:Be a Driver (Owner‑Operator Mentality): Take ownership of your work, continuously improve, and deliver exceptional results.Move at Drata Speed (Precision & Velocity): Make swift decisions, learn quickly, and create immediate impact.Stay Mission-Driven (Customer‑Obsessed): Challenge the status quo, deliver value, and maintain an insatiable hunger for improvement.If you thrive in an environment that empowers you, energizes you, and allows you to collaborate with intelligent, mission-focused individuals, you will find a home here.Why Join The Drata Team?Experiencing the Driver’s Mindset in action is the best way to understand it. We are an award-winning, mission-driven team of 600+ individuals globally, united by a culture that values trust, speed, and continuous growth.See the Speed: Watch our CEO, Adam Markowitz, discuss our remarkable growth journey from $0 to $100M ARR in just four years.Hear the Voice of the Team: Visit our "Life at Drata" page to read employee testimonials about our collaborative environment and growth opportunities.Experience the Impact: Discover why we consistently feature on Fortune's Best Workplaces lists.Connect with Us on Social Media: LinkedIn - follow us for updates...

About Delinea:Delinea is at the forefront of securing identities for both individuals and machines through sophisticated, centralized authorization methods. Our mission is to empower organizations by enabling seamless governance of interactions within the modern enterprise. Utilizing AI-driven insights, Delinea's cutting-edge cloud-native Identity Security Platform ensures comprehensive context is applied throughout the identity lifecycle across both cloud and traditional infrastructures, data systems, SaaS applications, and AI technologies. We provide the unique capability to identify all types of identities—including workforce members, IT administrators, developers, and machines—grant suitable access levels, detect anomalies, and respond to threats in real-time. Our platform boasts rapid deployment within weeks, requires 90% fewer resources to operate than our closest competitor, and achieves an impressive 99.995% uptime. Experience robust security and operational excellence without compromise. Discover more about us at Delinea.com, LinkedIn, Twitter, and YouTube.Join our dynamic global team at Delinea and contribute to making the world a safer, more secure environment. Our achievements stem from exceptional product leadership, outstanding engineering talent, and strategic partnerships with TPG. We embrace diversity, foster innovation, and cultivate a culture rooted in respect and fairness. If you are prepared to challenge boundaries and redefine norms in security and technology, we invite you to apply!

Join Our Team as a Founding Customer Success EngineerAt Tracebit, we empower leading security teams worldwide, including industry giants like Snyk, Docker, and Riot Games, to navigate cybersecurity challenges by 'assuming breach' at scale. Our innovative technology utilizes canaries—decoy tripwires designed to detect and deceive potential attackers within cloud environments.This is an exhilarating time to join our rapidly growing team:We are proudly supported by top-tier investors such as Accel and Tapestry.Our growth trajectory is remarkable—we recently doubled our Annual Recurring Revenue (ARR) last quarter and secured several high-profile clients that we are currently unable to disclose.Recognized as one of the most promising startups in cybersecurity, we’re poised for explosive growth, receiving outstanding market feedback.Featured on prestigious startup lists like Creandum's Euro Seed top 50 list and Sifted's 2025 London Startups To Watch.Our CTO’s groundbreaking research recently resolved a critical security flaw in Google's Gemini CLI.Our team has expanded from 2 to 18 members in just 18 months, with ambitious plans to triple our workforce this year.As our first Customer Success Engineer, your mission will be to ensure our clients derive maximum value from our offerings post-sale, establishing the technical foundation for exceptional customer experiences.

Moss helps finance professionals simplify their workflows and make informed decisions for future growth. Our team values real impact and ongoing development. Moss has earned spots on Sifted’s Rising 100 and LinkedIn's Top Startups lists. We focus on building careers while supporting Moss’s long-term success. Role Overview As a Customer Success Manager in London, join a team dedicated to driving SaaS revenue growth through proactive customer relationships. Use data to spot upsell opportunities and reduce churn. Your product knowledge and strategic thinking will help clients get maximum value from Moss. What You Will Do Build strong client relationships: Understand each customer’s financial goals and help them use Moss’s spend management tools fully. Spot upsell opportunities: Use your knowledge of Moss and client needs to identify new business and help customers get more value from current features. Track key metrics: Monitor revenue performance using KPIs like spend engagement, SaaS uplift, and renewal rates. Be a product advocate: Work with internal teams to share client feedback and offer input on product features, both current and upcoming. Improve processes: Design and refine customer journey touchpoints to increase satisfaction and retention. About You W...

Join Postman as a Customer Success Engineer and leverage your Spanish language skills to enhance customer experiences. In this role, you will work closely with clients to ensure they derive maximum value from our platform. Your technical prowess combined with outstanding communication abilities will help bridge the gap between our customers and our product offerings.

As a Customer Success Manager at Zip, you will be the driving force behind our customer satisfaction and retention efforts. You will engage with clients to understand their needs, provide solutions, and ensure they derive maximum value from our products. Your role will be pivotal in fostering long-term relationships that lead to customer loyalty and advocacy.

Accurx is looking for a Customer Success Manager to join the team in London (Shoreditch). The focus of this position is to build and maintain strong relationships with clients, making sure they see real value from Accurx’s healthcare software. What you will do Work closely with customers to learn about their goals and any challenges they face Provide support and advice that fits each client’s unique situation Assist organizations as they adopt and use Accurx products in their daily work Promote customer satisfaction and encourage long-term success with Accurx solutions Role focus This role centers on understanding client needs and ensuring they benefit fully from Accurx’s healthcare technology. Building trust and delivering practical support are key parts of the job.

As a Senior Customer Success Manager at Saviynt, you will play a pivotal role in driving customer satisfaction and success. You will work closely with clients to understand their needs, provide exceptional support, and ensure they derive maximum value from our solutions. Your expertise will be crucial in building strong relationships and fostering customer loyalty.

About AdaptiveAdaptive is an innovative cybersecurity startup dedicated to combating AI-driven cyber threats. Following a successful $81M Series B funding round in December 2025, led by NVIDIA and Bain Capital Ventures, the company has garnered additional support from notable investors including Capital One Ventures, Citi Ventures, and Andreessen Horowitz (a16z). This investment marks a significant step as NVIDIA's inaugural foray into AI cybersecurity.Founded by seasoned entrepreneurs Brian Long and Andrew Jones, who have a proven track record of creating high-growth companies, Adaptive aims to establish a robust security framework for the AI era. Their previous ventures, including Attentive, which achieved over $500M in annual revenue and a valuation exceeding $10B, and TapCommerce, acquired by Twitter, showcase their expertise in scaling successful, product-led businesses.Trusted by numerous leading banks, tech firms, and healthcare organizations, Adaptive is at the forefront of defending against evolving threats such as deepfakes, smishing, and AI-driven voice scams. With rapid enterprise adoption and an expansive market potential exceeding $200B, we are just beginning our journey.The RoleWe are excited to expand our Customer Success team and seek a Founding Senior Customer Success Manager located in London. This pivotal role offers a unique opportunity to shape our customer onboarding, implementation, and support processes across the EMEA region from the ground up.In this position, you will be the primary contact for our customers post-sale, overseeing their entire journey from implementation to ongoing success. As the voice of the customer, your focus will be on ensuring that clients derive both immediate and long-term value from Adaptive's platform. Collaborating closely with fellow Customer Success Managers, Engineering, Product, and Leadership teams, you will resolve issues, communicate customer feedback, and influence the product roadmap.This opportunity is perfect for individuals who thrive in dynamic, early-stage settings, enjoy crafting systems from the ground up, and seek to advance in a fast-paced, well-funded AI cybersecurity firm.

At Algolia, we take pride in being a trailblazer and market leader in AI Search, enabling over 17,000 businesses to provide ultra-fast, predictive search and browsing experiences at an internet scale. Each week, we handle more than 30 billion search requests — surpassing the combined totals of Microsoft Bing, Yahoo, Baidu, Yandex, and DuckDuckGo by fourfold.In 2021, we successfully raised $150 million in Series D funding, significantly increasing our valuation to $2.25 billion. This solid foundation allows us to continually invest in our leading platform and serve remarkable customers such as Under Armour, PetSmart, Stripe, Gymshark, and Walgreens.As a Customer Success Engineer at Algolia, you will be instrumental in ensuring our customers successfully adopt, implement, and scale our search and discovery platform. You will collaborate closely with clients to provide top-notch technical onboarding, solution design, best practices, and hands-on implementation support.This position is perfect for someone who possesses a deep curiosity, enjoys tackling complex technical challenges, and is excited by the prospect of learning and applying innovative technologies, including modern development patterns, cloud infrastructure, and cutting-edge AI capabilities. You will work across diverse customer architectures and use cases, assisting teams in designing high-performance, scalable solutions while promoting technical excellence.You will also support our Professional and Expert Foundation offerings, serving as the technical owner for your assigned accounts and ensuring seamless delivery through clear communication, detailed documentation, and thoughtful alignment with stakeholders.Success in this role requires a proactive, reliable, and collaborative approach, balancing customer-facing tasks with internal best practices such as accurate time tracking, effective documentation, and ongoing knowledge sharing.If you are enthusiastic about shaping customer outcomes, exploring new tools and technologies, and working within a team that values craftsmanship, curiosity, and continuous learning, we would love to connect with you.

About JuniorAt Junior, we are revolutionizing the investment research landscape with state-of-the-art LLM-powered tools designed specifically for private market investors. Our clientele includes some of the world's leading private equity and consulting firms, collectively managing billions in annual investments. As a profitable and bootstrapped organization, we take pride in our dynamic team of 24 based in both London and NYC.Discover more about our mission and values here. Role DescriptionAs a pivotal member of our Customer Success team, you will play a crucial role in ensuring our clients' success. We seek individuals who possess genuine empathy for the challenges faced by consultants and investors during due diligence work, and who can effectively demonstrate how Junior can enhance their efficiency and impact.Your responsibilities will include managing global deployments involving thousands of users, acting as the Voice of the Customer, and collaborating closely with our product team to eliminate pain points from our customers' workflows.In this role, you will:Develop and maintain robust relationships with clients, including key decision-makers at large-cap funds and consultancies, serving as their primary contact and trusted advisor throughout the onboarding and feedback processes.Oversee the execution of large-scale AI deployments for thousands of users.Transform customer feedback into actionable insights for product development, guiding our team on essential features to meet client demands.Co-create and deliver tailored training programs alongside our customers.Utilize data-driven strategies to enhance customer engagement, satisfaction, and retention.Advance into a managerial position as our Customer Success team expands.Contribute to the evolution of our team structure and the overall company culture. About YouWe are in search of a seasoned Customer Success Lead who:Has demonstrable experience in customer success roles, especially within the investment or consulting sectors.Is skilled in relationship management, with a track record of engaging effectively with senior stakeholders.Possesses strong analytical skills and the ability to leverage data for customer insights.Can effectively communicate and translate customer needs into product enhancements.Is passionate about driving user satisfaction and retention.

Role overview The Senior Customer Success Manager at Braze in London focuses on helping clients achieve their goals with Braze’s customer engagement platform. This position emphasizes building trusted relationships, guiding clients on effective practices, and making sure each client gains real value from the product. What you will do Partner with clients to understand their business objectives and support their success using Braze’s solutions. Work alongside internal teams to deliver strong service and respond to client needs. Offer guidance and share knowledge to help clients use Braze’s features effectively. Encourage customer satisfaction by anticipating potential challenges and offering practical solutions. Location This role is based in London.