Senior Backend Engineer – API Trading EMEA (F/M/D)

Role overview Wise seeks an Engineering Lead to focus on API experience in London. The role involves leading a team that designs and builds API solutions for customers at scale. This position centers on both technical leadership and team guidance. What you will do Guide and support engineers as they develop Wise’s API products Encourage new ideas and drive technical improvements within the team Oversee the creation and maintenance of scalable, reliable APIs Work to ensure Wise APIs align with customer needs and meet industry standards Location This position is based in London.

Role overview Wise is hiring an Engineering Lead to guide the API Experience Team in London. This position centers on building and refining API services that enable smooth integration and support reliable user experiences. The Engineering Lead manages a talented group of engineers and collaborates with teams across Wise to strengthen API products. What you will do Lead and mentor the API Experience engineering team Oversee the development and improvement of API services Work closely with teams from different functions to enhance product offerings Promote solutions that simplify integration for Wise’s partners and users

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

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.

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 at Ably, where we are at the forefront of the realtime digital experience revolution. As users engage in livestreams, receive instant financial updates, and collaborate online, we are committed to powering these experiences on a large scale.Our mission is to prioritize developers in everything we do. With a comprehensive suite of products, we enable the creation, enhancement, and delivery of powerful realtime digital experiences, handling billions of messages across millions of devices daily and serving prestigious clients such as Harness, EA, Panasonic, and HubSpot.At Ably, you will contribute to building the infrastructure and technology that will define the future of the internet. The potential here is vast, and we are eager for your expertise to help us reach new heights.About This RoleAs the Technical Lead for Developer Experience, you will co-architect the vision and strategy for our Developer Experience (DevEx). Your focus will be on transforming our dashboard, documentation platform, and control plane into an exceptional user experience. We seek a senior, hands-on engineer who is passionate about enhancing the developer journey and improving the overall user experience of the Ably platform.Your deep full-stack expertise will empower you to lead a team of five engineers, where immediate feedback is part of the process, as you and your team are the end users of the ecosystem you are creating.Day-to-Day ResponsibilitiesEnhance Developer Experience: You will take charge of how developers interact with Ably’s platform and services, collaborating with the DevEx PM to set a benchmark for the industry.Lead Technical Execution: You will guide a team of five engineers in developing customer-facing web applications and will be responsible for the technical architecture and design decisions regarding our dashboard, documentation platform, marketing website, and billing UI.Foster a Product-First Culture: You will cultivate an environment where engineers are principal stakeholders in product features, focusing on customer outcomes while challenging the conventional “feature factory” approach.Thrive in a Fast-Paced Environment: You will lead a team that works collaboratively with PMs, customers, and engineers to rapidly iterate and co-create features.

Role overview Wise is seeking a Product Lead to focus on the Onboarding Experience. This London-based role centers on making the first steps for new users straightforward and engaging. The Product Lead will oversee projects that help users get started smoothly with the Wise platform. What you will do Lead initiatives to improve and streamline the onboarding journey for Wise users Shape product strategies that help users succeed from their very first interaction Create and implement solutions that ensure onboarding is clear and welcoming Location This role is located in London.

Join ClearBank as an API Integration Analyst and play a pivotal role in enhancing our banking solutions through seamless API integrations. You will work closely with cross-functional teams to analyze, design, and implement integration solutions that meet our clients' needs. This is a fantastic opportunity for someone who is passionate about technology and its application in the financial sector.

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.

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.

Checkatrade seeks a Workplace Experience Lead to foster a welcoming and inclusive atmosphere at the Moorgate, London office. This role centers on making the workplace a space where employees feel valued and connected, with a focus on daily experience and team collaboration. Key responsibilities Create and carry out workplace strategies aimed at improving employee satisfaction and engagement. Design and support programs that encourage collaboration and bring colleagues together. Partner with various departments to ensure the office environment reflects company values and helps everyone feel they belong. Role focus This position is based in Moorgate, London. The Workplace Experience Lead plays a central part in shaping the culture and supporting a positive, collaborative environment for all employees at Checkatrade's London office.

Join our dynamic team at ben as an Engineering Lead. In this pivotal role, you will oversee engineering projects, lead a talented team of engineers, and drive innovation to meet the strategic goals of the company. Your expertise will be crucial in shaping the engineering direction and ensuring high-quality outcomes.

Job Title: Engineer II Location: London / Bristol / Edinburgh (Hybrid options available) Salary: £45,600 - £62,700 Team: Developer Experience Reporting To: Senior Software Engineering Manager This position is based in the UK and candidates must possess the right to work in the UK. Currently, we are unable to offer visa sponsorship for this position. Our commitment to building a diverse, global team is paramount, and our sponsorship policy is assessed on a role-by-role basis. Please check back on our careers site for future opportunities that may include visa sponsorship. Kaluza is revolutionizing the energy sector with our Energy Intelligence Platform, simplifying the complexities of energy management. We assist energy companies in addressing contemporary challenges while propelling the transition to a sustainable, electrified future. Our platform facilitates millions of real-time decisions across households, devices, markets, and grids. By integrating predictive algorithms with user-centric design, Kaluza ensures that clean energy is reliable, affordable, and seamlessly integrates into daily life. With teams spread across Europe, North America, Asia, and Australia, and a joint venture with Mitsubishi Corporation in Japan, we empower leading companies such as OVO, AGL, and ENGIE, alongside innovators like Volvo and Volkswagen. Where will I be working? You will be part of the Developer Experience (DevEx) team within our expansive Kaluza Technology community. Our team comprises a diverse group of data-driven and product-oriented Software and Production Engineers who are at the forefront of technological innovation and operate at an impressive scale. Together, we pursue engineering excellence by implementing best practices throughout the community. In this role, you will be instrumental in designing and enhancing our Internal AI Engineering Platform. Your responsibilities will include creating the infrastructure—from Model Context Protocol (MCP) servers to collaborative workflows—that enables our software teams to operate more efficiently and securely. Your contributions will significantly influence Kaluza's ability to eradicate defects, enhance productivity, and set the benchmark for AI-driven development. Our tech stack is dynamic, and you may work with: AWS, Kubernetes, LLMs (Claude, GPT, etc.), MCP servers, LangChain/LangGraph, and contemporary monitoring tools.

Join Zopa as a Platform Engineer focused on enhancing developer experience! In this role, you will be instrumental in optimizing our development platform, facilitating a seamless workflow for our engineering teams. Your expertise in platform technologies will empower developers to build and innovate more efficiently.

Over 500 million downloads. 80 million monthly users. A decade of relentless innovation – and we’re just getting started.Flo is the leading health & fitness app globally, dedicated to transforming the future of female health. With a $200 million investment led by General Atlantic, we proudly became the first app in our sector to achieve a $1 billion valuation in 2024. Our journey continues unabated.With 7 million paid subscribers and the highest-rated user experience in the App Store’s health category, we have spent the last decade building trust on a grand scale. Now, we are pioneering the next generation of digital health technologies – AI-driven, privacy-centered, and clinically validated – to empower our users to better understand their bodies.Your RoleThe Challenge AheadAt Flo, we’re more than just an app; we’re a thriving global community. As the number one women’s health app, we experienced 8.6 million new installs in the last month, along with a 2.8 million increase in active users.This extraordinary growth demands top-tier engineering talent. We are on the lookout for a Senior Developer Experience Engineer to join our Velocity team, which focuses on enhancing our internal platform. Your objective will be to create the foundational tools that empower our engineering teams to deploy code more efficiently, securely, and at a scale that most engineers rarely encounter.Your Mission: VelocityThe Velocity team aims to minimize friction in the development process. We see our internal developers as our primary customers. Your responsibilities will include:Simplifying Complexity: Craft intuitive tools that facilitate self-service, allowing developers to concentrate on core product logic.Standardizing Excellence: Integrate best practices, security, observability, and scalability into our core infrastructure, ensuring they are fundamental, not just afterthoughts.Your ResponsibilitiesEnhancing Developer Experience: Develop self-service tools that grant product teams the autonomy they need without compromising system stability.Platform Engineering: Design and advance our core technology stack (AWS, EKS, Terraform, Ansible).Systems Resilience: Spearhead reliability initiatives, encompassing business continuity planning and a sustainable on-call strategy.Privacy at Scale: Bolster the infrastructure for industry-leading privacy features, such as our TIME-recognized "Anonymous Mode." Observability: Deploy cutting-edge monitoring solutions (metrics, logs, tracing) to ensure swift identification and resolution of issues.

About LystLyst is a pioneering global fashion shopping platform established in London in 2010, catering to over 160 million shoppers annually. We curate selections from 27,000 of the world’s premier brands and retailers. In 2025, Lyst partnered with Zozo, the operators of Zozotown, Japan's leading fashion e-commerce platform. This collaboration signifies a transformative era for Lyst as we strive to redefine the landscape of fashion shopping through artificial intelligence, personalization, and cutting-edge technology.The MissionWe are seeking an accomplished Engineering Manager to join our Shopping Experience team. You will play a crucial leadership role in our endeavor to create the most intelligent and seamless fashion shopping platform globally.In this position, you will collaborate closely with Product and Design within a leadership trio to shape strategic initiatives, drive execution, and deliver substantial business impact across Lyst’s Marketplace. This team is essential in enhancing the customer experience, facilitating a smooth purchasing journey, and showcasing the value of our partner fashion retailers. You will blend strategic technical leadership with a strong emphasis on operational excellence, predictable delivery, and the professional growth and wellbeing of your team.Key ResponsibilitiesTeam Leadership: Cultivate a high-performing and psychologically safe environment that empowers engineers to excel. You will be responsible for the hiring, retention, mentoring, and career advancement of your engineering team.Delivery Management: You will oversee the execution of strategy, ensuring it translates into predictable and high-quality delivery. Utilizing Agile methodologies, you will eliminate obstacles, manage inter-team dependencies, and contribute to code reviews. This role is hands-on and involves direct engagement with engineers.Technical Strategy: While you won't be coding daily, you will maintain close engagement with the technical aspects. You will guide architectural decisions, uphold code quality standards, and ensure the team addresses technical debt alongside feature development.Collaboration: Acting as a liaison between engineering and the broader business, you will translate complex technical concepts into clear, actionable insights for stakeholders across Marketing, Commercial, and Partnerships.Within Your First 3 Months, You Will:People: Forge strong relationships with your direct reports, understand their motivations and career aspirations, and establish clear growth trajectories.Delivery: Assess existing Agile practices and implement targeted enhancements that improve predictability, quality, and team efficiency.

We are seeking a dynamic and experienced Engineering Lead to join our innovative team at dev2. In this pivotal role, you will spearhead engineering projects, mentor a talented group of engineers, and collaborate with cross-functional teams to drive the success of our cutting-edge solutions.The ideal candidate will possess a proven track record in engineering leadership, demonstrating both technical expertise and a passion for fostering a collaborative team environment. You will play a crucial role in shaping our engineering practices and ensuring the delivery of high-quality products.

Join our dynamic team at Caribou as an Engineering Lead. In this pivotal role, you will lead a talented group of engineers to drive innovation and excellence in our engineering projects. You will collaborate closely with cross-functional teams to deliver high-quality solutions that meet our business objectives.As an Engineering Lead, you will leverage your technical expertise and leadership skills to mentor junior engineers, oversee project timelines, and ensure adherence to best practices in software development. Your contributions will be critical in shaping the future of our engineering initiatives.

Role overview Ebury Partners UK Limited is seeking a Senior Product Manager to lead its API Platform in London. This position shapes the company’s API strategy and drives execution, working with teams throughout the business to enhance and grow product capabilities. What you will do Direct the development of API products that align with business goals and client requirements. Collaborate with engineering, design, and commercial teams to launch new features and refine existing ones. Prioritize projects and initiatives, drawing on product management experience to deliver results on schedule. Leverage expertise in API technologies to spot opportunities for improvement and innovation. Requirements Solid track record in product management, particularly with API platforms or similar technologies. Strong communicator with experience working across multiple teams. Skilled at turning client needs into actionable product solutions. This role is based in London. Ebury is a fintech company dedicated to building solutions that help clients advance their business.