Customer Success Engineer - API

Join Us in Revolutionizing Travel!Travel is an integral part of life, whether it’s to reconnect with loved ones, embark on thrilling adventures, or attend significant business engagements. Unfortunately, many travelers face challenges due to outdated technology. Over 4 billion airline passengers depend on systems that fail to meet the expectations of the modern, connected traveler.At Duffel, we are on a mission to transform the travel industry by rebuilding its infrastructure. Our goal is to simplify complex systems and create innovative tools that make travel seamless and enjoyable.As a proud participant of Y Combinator's S18 cohort, we are backed by leading investors such as Benchmark, Blossom, Index Ventures, and Kima Ventures, who have supported the growth of some of the world’s largest companies.We are seeking a passionate Customer Success Engineer (CSE) to provide exceptional technical support to our key customers. In this role, you will address customer inquiries, guide them in utilizing our APIs effectively, and collaborate with various departments including Product, Engineering, Finance, and Travel Operations to enhance the overall customer experience.

CoreWeave is the quintessential cloud solution for AI™, designed by innovators for innovators. Serving a diverse clientele, including leading AI labs, startups, and global enterprises, CoreWeave provides a powerful platform enriched with state-of-the-art technology, tools, and expert teams to empower innovators in building and scaling AI solutions with assurance. Since our inception in 2017, we have achieved the status of a publicly traded company (Nasdaq: CRWV) in March 2025. Discover more at www.coreweave.com. We take pride in being a Living Wage accredited employer. What You’ll Do:As a member of the Physical AI Field Engineering team at CoreWeave, you will collaborate directly with engineering organizations to implement AI solutions that revolutionize the analysis of testing, simulation, and manufacturing data. You will engage closely with customers, applying machine learning techniques to complex physics challenges, enabling them to derive insights from extensive engineering datasets and enhance decision-making throughout their development processes.The Senior Customer Success Engineer will work in tandem with Forward Deployed Data Scientists and other technical experts to deliver impactful AI applications within customer environments. By integrating engineering domain knowledge with practical machine learning skills, you will ensure that AI solutions yield tangible benefits within production engineering workflows.About the Role:CoreWeave is on the lookout for a Senior Customer Success Engineer to facilitate the technical delivery of AI solutions tailored for engineering teams.In this capacity, you will collaborate closely with delivery leads and data scientists to execute customer solutions using engineering datasets, including simulation, testing, and manufacturing data.You will leverage machine learning principles in real-world engineering workflows while guiding customers in understanding and embracing AI-driven problem-solving methodologies.Your contributions will be pivotal in the successful deployment and integration of AI solutions across various customer projects.

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.

Role overview Primer.io is seeking a Senior Customer Success Manager in London to work closely with clients across Europe. This position focuses on guiding customers through the full use of Primer.io’s products and services. The Senior Customer Success Manager serves as the primary point of contact for European clients. Building strong, trusted relationships is central to this role. The work involves supporting customers, answering questions, and helping them make the most of what Primer.io offers. Encouraging product adoption and ensuring customer satisfaction are key priorities. The goal is to help clients achieve success with Primer.io’s solutions and maintain a positive, ongoing partnership.

Join the dynamic team at Sony Interactive Entertainment Global as a Senior Software Engineer specializing in Rendering API. In this pivotal role, you will be responsible for developing and optimizing rendering technologies that enhance the gaming experience for millions of users worldwide. You will collaborate closely with cross-functional teams to bring innovative solutions to life, ensuring top-notch performance and visual fidelity in our gaming products.

Who Are We?At Postman, we are the foremost API platform, serving over 45 million developers and 500,000 organizations, including an impressive 98% of the Fortune 500. Our mission is to empower developers worldwide to craft an API-first world by simplifying the entire API lifecycle and enhancing collaboration—ultimately allowing our users to create superior APIs at a faster pace.Headquartered in San Francisco, we have established offices in Boston, New York, Austin, Tokyo, London, and Bangalore, where our journey began. As a privately held company, we are supported by renowned investors like Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Explore more at postman.com or connect with us on social media via @getpostman.P.S: We highly recommend reading The "API-First World" graphic novel to gain insights into our broader vision at Postman.The OpportunityAs our customer base experiences unprecedented growth, we are on the lookout for seasoned Enterprise Customer Success Managers to expand our business in the UK.In this role, you will lead post-sale strategy and engagement across a portfolio of named Enterprise accounts. Collaborating closely with your customers, you will co-create Joint Success Plans that detail key objectives, milestones, and success criteria. By partnering with our Solutions Architecture and Customer Education teams, you will facilitate impactful enablement programs designed to rapidly address critical challenges. Regular interactions with key stakeholders will allow you to assess the value they derive from our platform and identify new opportunities for growth.This position is ideal for a tech-savvy professional passionate about Customer Success. The perfect candidate will be a strategic thinker with a proven track record in nurturing customer relationships, accelerating adoption, expanding use cases, and achieving exceptional customer outcomes.

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.

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.

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.

Role overview As a Senior Customer Success Partner at creatoriq, the focus is on supporting enterprise clients from the London office. The position centers on building strong, lasting relationships and guiding organizations through onboarding. Helping clients achieve their business goals with creatoriq’s solutions is a key part of the role. What you will do Develop and maintain partnerships with enterprise customers Lead onboarding to ensure clients get started smoothly Support clients as they work toward their business objectives using creatoriq’s products Identify ways to improve the client experience and contribute to account growth Share strategic insights and act proactively to address client needs Location This position is based in 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.

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.

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!

CoreWeave is The Essential Cloud for AI™, designed by pioneers for pioneers. Our platform empowers innovators to develop and scale AI solutions confidently. Trusted by top AI laboratories, startups, and global corporations, CoreWeave integrates exceptional infrastructure performance with profound technical expertise to catalyze breakthroughs, transforming compute into capability. Established in 2017, CoreWeave became publicly traded on Nasdaq (CRWV) in March 2025. Discover more at www.coreweave.com. We are proud to be a Living Wage accredited Employer. Your Role:The Physical AI Field Engineering team at CoreWeave is dedicated to implementing AI solutions within enterprise engineering organizations, ensuring customers derive tangible value from machine learning applications. This team collaborates across various engineering disciplines to convert complex test and simulation datasets into actionable insights, enabling customers to enhance engineering decisions and accelerate product development.As a Lead Customer Success Engineer, you will act as a technical delivery leader, orchestrating multiple workstreams and ensuring customer engagements yield reliable, high-quality outcomes. By merging technical expertise with project leadership, you will play a pivotal role in conveying complex technical execution into clear customer value.Key Responsibilities:Lead the delivery of AI solutions for key customer engagements.Design and oversee comprehensive technical delivery, translating intricate customer objectives into structured workstreams, milestones, and measurable outcomes.Coordinate execution across product, engineering, and data science teams, serving as the primary technical point of accountability for customer deliverables.Guarantee that complex AI deployments are executed reliably, punctually, and with clear value for customer stakeholders.Who You Are:Over 6 years of experience leading complex technical projects or delivery programs for enterprise engineering clients.Proven track record in designing technical solutions that drive measurable outcomes.

JavaScript/API EngineerAre you passionate about revolutionizing capitalism and supporting noble causes? Do you enjoy crafting innovative products that can significantly impact people's lives?At Percent, we aspire to build a world where doing good is effortless. Our inaugural mission is to channel 1% of global retail spending towards charitable initiatives.With our third round of funding secured to turn this vision into reality, we are searching for an exceptional JavaScript/API Engineer to join our enthusiastic team. You will play a pivotal role in developing an array of remarkable features for our key stakeholders, including some of the largest charitable organizations globally.We offer:A supportive and enjoyable team environmentA strong focus on people and collaborationA substantial and impactful projectA modern office located in central LondonDelicious company lunches every TuesdayAn opportunity to address global challenges while maintaining a positive mindsetA creative and unconventional work cultureYou should possess:A passion for contributing to a better worldA willingness to take shared ownership of a significant projectStrong proficiency in Object-Oriented JavaScript and Node.jsExperience with various database technologiesCapability to handle high-volume API calls and scale solutions globallyUnderstanding of networking protocolsFamiliarity with numerous AWS servicesKnowledge of network configurationsExperience with monitoring systems, continuous integration, and testingA creative and unconventional approachAdditionally, while not mandatory, it would be beneficial to have knowledge of:Serverless architectures (AWS Lambda)HTTP/2Containerization technologiesVideo streaming solutionsInfrastructure as codeA fondness for tea breaksWe provide:Competitive compensation for the right candidate along with excellent equity optionsAn opportunity to become a partner in our missionA prime location in Soho/PiccadillyA highly comfortable workspaceFresh fruit every day (or biscuits for those with a sweet tooth)A fully stocked luxury coffee and tea machine available at all times

Your Next Challenge AwaitsFreshworks is on the lookout for a seasoned Senior Manager of Customer Success to spearhead and expand our UKI team. Located in London, you will be pivotal in ensuring our Enterprise and Mid-Market clients derive substantial value and achieve sustainable success with Freshworks. In this role, reporting to the Director of Customer Success EMEA, you will establish regional strategies, lead a dynamic team of Customer Success Managers (CSMs), and foster cross-functional collaboration to deliver exceptional customer experiences. This strategic yet hands-on leadership position is perfect for an individual passionate about driving outcomes, nurturing talent, and transforming customer success at scale.Key ResponsibilitiesGuide and mentor a team of 8 CSMs across various European markets.Enhance customer retention, growth, and advocacy within the Enterprise and Mid-Market segments.Create scalable, data-informed frameworks for success plans, health assessments, and operational playbooks.Collaborate across departments including Sales, Product, Support, and Marketing to shape expansion strategies and enhance customer engagement.Act as a senior sponsor for strategic accounts, cultivating robust, outcome-focused relationships.Represent the Voice of the Customer, shaping global Customer Success strategies and best practices.Defining SuccessYou will lead a motivated, high-achieving team that consistently delivers tangible results—enhancing retention, growth, and overall customer health. Your influence will extend beyond your team, shaping how Freshworks scales Customer Success across Europe through collaboration, operational excellence, and data-driven methodologies.

At NiCE, we embrace challenges and strive to exceed our limits. Our ambition drives us as we innovate and aim for victory. We uphold the highest standards and consistently go beyond them. If you share our commitment to excellence, we offer a remarkable career opportunity that will ignite your passion.What does the role entail?The Senior Customer Success Manager plays a crucial role in ensuring that Cognigy’s customers feel thoroughly supported and guided throughout their experience with our products. You will be responsible for guaranteeing that customers achieve their desired outcomes while also identifying opportunities for future expansion. This position reports to the Director of Customer Success and will contribute to maintaining a balanced portfolio within the Customer Success team while facilitating effective external communication across the organization.How will you make a difference?Utilize your extensive background in enterprise software solutions to guide customers in strategically leveraging Cognigy’s technology, optimizing their investment through innovative AI applications.Conduct structured discovery processes to accurately identify customer needs and ensure the timely execution of solutions.Provide expert assessments and recommendations on our solutions, engaging in in-depth technical discussions to highlight the impact and value of our features.Engage directly with enterprise executives, articulating the strategic business value of our solutions and influencing key decision-makers to drive transformative change within their organizations.Establish and monitor customer success metrics, using data-driven insights to refine strategies and report on the value delivered to customers and the business.Design and implement effective customer retention strategies, including regular executive business reviews and tailored engagement plans to reduce churn.Develop persuasive sales proposals for products and services, aligning them with customer objectives and negotiating mutually beneficial terms.Foster the growth of customer advocates through case studies, testimonials, and referrals, enhancing the company’s market reputation and growth.Collaborate closely with sales and technical teams to promote customer loyalty and satisfaction, ensuring a unified approach to long-term success.

About UsAt Temporal, we are revolutionizing the way developers build applications with our open-source programming model. Our platform simplifies code, enhances application reliability, and allows developers to concentrate on delivering features swiftly. We aim to be the cornerstone of every developer's toolkit and are assembling a talented team to realize this vision. Our core values drive our actions and decisions, fostering a culture of curiosity, determination, collaboration, authenticity, and humility. As we expand, we seek individuals who resonate with our values, challenge conventional thinking, and aspire to shape our future. If you are passionate about enhancing the developer experience and creating exceptional open-source software and communities, we would love to connect with you!SummaryThe Senior Developer Success Engineer will serve as the primary technical resource for our developer community. You will assist users in deploying and scaling Temporal within cloud-native environments, troubleshoot intricate infrastructure issues, optimize application performance, and design automation solutions. This position is perfect for someone who enjoys tackling challenges in distributed systems and enhancing the developer experience.What You'll DoBe a dedicated learner:You will engage with cloud-native, highly scalable infrastructures that encompass AWS, GCP, Kubernetes, and microservices. This role offers the chance to gain deep insights into distributed systems orchestration, networking, and observability through real-world customer scenarios.Our technology stack features Go, Python, TypeScript, Java, and .NET, presenting ongoing opportunities to refine your programming skills in distributed systems design, testing, troubleshooting, automation, resilience engineering, and performance optimization.Be a committed problem solver:If you find joy in addressing scalability, reliability, and troubleshooting challenges in distributed systems, you will excel in this role.You will collaborate directly with developers to resolve complex issues, enhance performance and reliability, improve user experience, and ensure their success with Temporal.

Join Xero as the Head of Customer Success, where you will lead our dedicated team to enhance customer satisfaction and drive engagement. In this strategic role, you will develop and implement robust customer success initiatives, ensuring our clients achieve their desired outcomes. Your leadership will inspire a culture of excellence and continuous improvement, fostering strong relationships with our valued customers.