Engineering Lead - API Experience

Join us in revolutionizing travel!Travel is more than just a journey; it connects us with loved ones, opens up new adventures, and creates unforgettable experiences. Yet, the frustrations of travel can often overshadow the excitement. Over 4 billion airline passengers depend on outdated technology that fails to meet the expectations of today's connected traveler.At Duffel, we are on a transformative mission to modernize the travel infrastructure. We aim to simplify complex systems and develop innovative tools that ensure a seamless travel experience for everyone.As part of the Y Combinator S18 cohort, we are proudly backed by notable investors including Benchmark, Blossom, Index Ventures, and Kima Ventures, who have played a pivotal role in the growth of some of the world’s leading companies.Position OverviewIf you are passionate about customer success and excel at solving intricate technical challenges, this is the perfect opportunity for you. Duffel is seeking a Customer Success Engineer (CSE) to deliver expert technical support to our key clients. In this role, you'll assist customers by answering their inquiries and recommending effective ways to leverage our APIs to create outstanding travel experiences. Furthermore, you will work closely with various teams across Duffel, including Product, Engineering, Finance, and Travel Operations, to guarantee an exceptional customer journey with our products and services.

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 Unfortunately, many travelers face challenges due to outdated technology.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.

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.

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.

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.

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.

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

Join ClearBank as an Engineering Manager specializing in API development, where you will lead a talented team of engineers in designing and implementing robust API solutions. Your leadership will drive innovation and efficiency, ensuring our API offerings meet the highest standards of performance and reliability.This role offers a unique opportunity to influence our technical direction while fostering a culture of collaboration and continuous improvement. You will work closely with cross-functional teams to deliver exceptional products that empower our clients.

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.

xai seeks a Backend Engineer in London, UK to focus on API development. This role involves designing and building APIs that form the backbone of the company’s products and services. Key responsibilities Design and implement APIs to support xai’s solutions Collaborate with frontend developers and product managers to ensure seamless feature integration Optimize API performance and maintain reliability This position offers the chance to work closely with both technical and product teams, shaping the way xai’s services communicate and perform.

About MixpanelMixpanel is an innovative event analytics platform designed for builders who require immediate insights from their data—no SQL expertise needed. By enabling everyone in the organization to visualize and learn from the effects of their contributions on product, marketing, and company revenue metrics, we empower teams to make informed decisions.With over 9,000 paying clients, including renowned companies like Netflix, Pinterest, Sweetgreen, and Samsara, Mixpanel helps organizations understand their customers and track progress effectively. We are dedicated to offering the most comprehensive and trustworthy analytics platform that is accessible and relied upon by all.About the Customer Success TeamThe Customer Success & Solutions Engineering teams at Mixpanel are dedicated analytics consultants who integrate with our enterprise clients to achieve their business objectives. We engage with prospects and clients across the customer journey to comprehend what adds value, acting as the technical partner to our Sales team to fulfill that value. You will collaborate closely with Account Executives, Account Managers, Product, Engineering, and Support teams to successfully implement self-serve analytics in our customers' organizations, manage change effectively, and execute technical projects and services that enhance customer satisfaction and drive ROI on their Mixpanel investment.About the RoleAs a Customer Success Architect, you will engage with customers at every stage of their journey to discern what drives value, from pre-sales proof of concepts to illustrate rapid time to value, to post-sales onboarding and implementation, ensuring customers are set for sustainable success with scalable implementations and best practices in data governance. Throughout the customer lifecycle, you will explore how analytics can propel business value and advise them on optimizing the Mixpanel experience, including managing change during the rollout, defining and achieving ROI, and pinpointing areas for enhancement in their current analytics usage. For large enterprise clients, following onboarding, you will also work with Account Managers to foster data trust and product adoption among over 100 end-user teams through a structured change management rollout approach.

Role Overview impact is hiring a Customer Success Manager in London. This role focuses on helping clients reach their goals and get the most value from our solutions. Building strong relationships and supporting customer satisfaction are central to this position. What You Will Do Support clients as they use our products and services Work closely with customers to understand their needs and objectives Strengthen long-term relationships to encourage continued success Help clients resolve issues and make the most of our offerings What We Look For Proactive approach to client support Strong focus on customer satisfaction Ability to build and maintain trust with clients

At NiCE, we embrace challenges and push beyond our limits. As ambitious game changers, we strive for excellence in every endeavor. If you share our passion for innovation and success, we offer a career opportunity that will ignite your potential.What Does the Role Entail?As a Customer Success Manager, you will take charge of fostering enduring relationships with our key NiCE CX customers post-purchase and throughout their product implementation journey. You will be their trusted advocate, ensuring they realize the full value of our solutions.Your engagement with customers will begin before they launch our contact center platform, and you will remain closely involved to guarantee adoption, measurable ROI, and long-term success.Our team comprises experienced customer success professionals who are dedicated to surpassing customer expectations. You will manage multiple high-touch, complex enterprise accounts, driving the adoption of AI-powered capabilities and enhancing overall customer experience.In partnership with customers, you will guide them in utilizing NiCE technology effectively, expanding usage, and nurturing long-term, loyal relationships. Your assigned accounts may include those with premium service packages, necessitating high levels of engagement and strategic guidance.Engagements with customers will occur through various channels including phone, email, chat, and video conferencing, with in-person visits as necessary. Travel to customer sites for value reviews and executive meetings will be expected.Collaboration is key; you will work independently as well as alongside Sales, Technical Support, Professional Services, Product Management, Engineering, and other teams to achieve the highest levels of customer satisfaction and success.Your Impact:Serve as the primary point of ownership for customer success across assigned accounts, coordinating NiCE CX resources to deliver outstanding outcomes.Develop and nurture strong, productive relationships with customers, holding regular success reviews to align with their contact center operations and business goals.

Join Harvey as the Head of Customer Success for the EMEA region, where you will lead our efforts in delivering exceptional customer experiences. You will be responsible for developing and implementing customer success strategies that foster long-term relationships with our clients, ensuring they achieve maximum value from our solutions.This role will involve collaboration with cross-functional teams to drive customer engagement and retention, while also identifying opportunities for growth within existing accounts.

Join a Transformative CompanyAt Palantir, we strive to revolutionize decision-making and operational efficiency through our cutting-edge software solutions. Our platforms empower organizations to harness data effectively, enabling them to develop life-saving pharmaceuticals, predict supply chain challenges, locate missing persons, and much more.Your RoleAs a Forward Deployed Enablement Engineer, you will be an integral part of centralized customer success teams, dedicated to maximizing the impact of our deployed products and workflows for a diverse clientele, ranging from agile startups to expansive enterprises. This role seamlessly blends high-level support with the creation of innovative tools and infrastructure aimed at enhancing customer enablement on a large scale. You will be a tenacious and resourceful problem-solver, adept at collaborating and working independently to tackle complex technical challenges, while also engaging directly with customers to diagnose and resolve their issues.Our Customer Success team is committed to helping clients leverage Palantir’s Foundry & AIP Platforms to drive their most critical business processes. In this position, you will apply your analytical skills, creativity, and technical expertise to support customer development teams, ensuring they can effectively construct and refine their workflows. This role offers a unique opportunity to gain valuable insights and contribute to some of the world’s most impactful industries and organizations.Every day at Palantir presents new challenges and opportunities for innovation. As we continuously evolve to meet customer demands, you will be encouraged to contribute your creativity and problem-solving skills to enhance our internal processes and tools, ultimately delivering greater business value to our customers with improved efficiency.At Palantir, we believe in empowering each employee to leverage their unique strengths. There is no singular approach to engineering within our company; this role is intentionally broad to allow individuals to explore their passions and grow in ways that inspire them.

Join anima as a Customer Success Manager, where you will play a pivotal role in ensuring our clients achieve their goals and maximize their value from our services. You will be the primary point of contact for our customers, guiding them through the onboarding process and providing ongoing support to enhance their experience with our innovative solutions.Your expertise will help identify customer needs and promote our solutions effectively. You will collaborate closely with various teams to ensure a seamless experience for our clients.