Join Us in Revolutionizing the Fashion Supply Chain!Every year, the fashion industry generates over 100 billion garments, with a staggering 60% ending up in landfills—not due to lack of demand, but because the supply chain for secondhand fashion is outdated and inefficient.At Fleek, we are committed to changing this narrative. Our mission is to position secondhand fashion as the preferred choice, by developing a robust infrastructure that supports the global secondhand clothing market through a B2B marketplace and AI-driven systems that digitize the supply chain.With Fleek, vintage shops, online resellers, and retail buyers can source high-quality secondhand inventory directly from wholesalers and rag houses across various countries. Our innovative solution, FleekSort, is an AI model specifically designed for secondhand fashion, enabling grading, pricing, and categorization of items with just a photo, transforming an opaque and manual trade into a clear, searchable, and tradable global inventory.Since our inception in 2022, we have rescued 9 million items from landfills and have seen our growth triple year-on-year. We have successfully raised approximately $50M from leading investors such as a16z, Y Combinator, Burda Principal Investments, and HV Capital, and recently completed our Series B funding round. Our advisors and private investors include key figures from Depop, Shopify, and Postmates.Currently, we cater to thousands of resellers and retailers across the UK, Europe, and the US. With projections of the secondhand fashion market reaching $350B by 2027, Fleek is poised to establish the AI-powered operational and financial backbone for global secondhand commerce.Are you ready to contribute to a cause that truly matters and drive change swiftly? If so, we want to hear from you!About the RoleWe are on the lookout for a highly technical and innovative Full-Stack Growth Builder who will redefine how customer lifecycle marketing propels growth at Fleek. This role transcends traditional CRM responsibilities; you will design and implement the entire system from data collection to strategic execution, making AI your primary toolkit.Your responsibilities will include creating intelligent CRM systems that identify the optimal timing, channel, and messaging for customer outreach, utilizing real-time user signals and context. You will also establish robust experimentation frameworks to accurately measure the impact of lifecycle messaging while avoiding over-attribution. Furthermore, you will spearhead the use of AI-driven content generation and personalization, ensuring a balance between scalability, quality, and relevance.As we scale our marketplace from thousands to tens of thousands of active buyers, you will be instrumental in building our data infrastructure in real-time.

Join Stacks, a dynamic and innovative company at the forefront of growth marketing. We are seeking a passionate Growth Marketer who will play a pivotal role in driving our marketing strategies and initiatives. You will be responsible for developing, executing, and optimizing campaigns that attract and retain customers, leveraging data-driven insights to enhance our market presence.As a Growth Marketer, you will collaborate closely with cross-functional teams to identify growth opportunities and implement effective marketing tactics. Your creativity and analytical mindset will be key in designing engaging content and utilizing various digital channels to reach our target audience.

Join Our Visionary Team to Create the Premier Training Platform for RunnersAt Runna, we empower everyday runners to achieve their best by developing an exceptional app that offers top-tier training, coaching, and community support. Whether you're aiming to enhance your 5k performance or prepare for your inaugural marathon, we're here to guide you every step of the way.Our growth trajectory is remarkable! In November 2023, we successfully secured a $6.5M funding round led by JamJar, with contributions from Eka Ventures, Venrex, and Creator Ventures. In 2024, we were honored to be recognized by Apple as one of three global finalists for the iPhone App of the Year, showcasing the innovation and impact of our platform. The journey continued with our acquisition by Strava in 2025!Our aspirations are ambitious: we aim to be the leading global training platform for millions of runners worldwide. As we evolve with purpose, we seek passionate individuals who want to contribute to something meaningful and impactful. With Strava's recent acquisition propelling our mission forward, this is an extraordinary time to become a part of our journey. The Growth Team You’ll Be JoiningWe are on the lookout for a skilled, inquisitive, and experimentation-driven Senior Full Stack Engineer to join our Growth Engineering team. This team is responsible for critical aspects of the user journey at Runna, focusing on both web and app platforms to craft high-quality experiences that convert first-time visitors into dedicated subscribers. You will collaborate closely with product, design, and data teams, as well as our founders and CTO, to enhance how new users discover and engage with Runna.Your ResponsibilitiesDesign, develop, test, and deploy high-impact user journeys and subscription funnels aimed at transforming curious visitors into active, engaged subscribers.Create and execute experiments across both web and app (including onboarding processes, paywalls, and plan discovery experiences) to optimize conversion at every stage of the user journey.Work collaboratively with Product, Design, and Data teams to identify opportunities, establish clear success metrics, and make informed decisions based on experimental outcomes.Partner with other teams to ensure users enjoy a seamless and consistent experience as they navigate through various products and platforms.Implement and sustain the instrumentation, tracking, and tools necessary for understanding user behavior, quickly identifying issues, and accurately measuring impact.Take ownership of features and initiatives that drive user engagement and retention.

Join a dynamic team creating the leading training platform for runners!At Runna, we're dedicated to transforming everyday runners into elite athletes through our state-of-the-art app that offers world-class training, coaching, and a vibrant community. Whether you're aiming to improve your 5k time or gearing up for your first marathon, we are here to help you succeed.Our growth has been remarkable! In November 2023, we secured a $6.5M funding round led by JamJar, complemented by investments from Eka Ventures, Venrex, and Creator Ventures. In 2024, we proudly earned recognition as one of Apple’s three global finalists for the iPhone App of the Year, showcasing our innovative spirit and significant impact. The acquisition by Strava in 2025 has accelerated our mission even further!Our vision is ambitious: to establish ourselves as the premier global training platform for millions of runners worldwide. We are purposeful in our growth and are searching for individuals who aspire to create something meaningful and impactful. With the recent Strava acquisition enhancing our trajectory, there has never been a better time to join us. Your Future TeamWe are on the lookout for a full stack engineer to join our Growth team, primarily focusing on marketing technology. This role places you at the crossroads of product development, data analysis, and marketing efforts – building and supporting the systems that drive our user acquisition, activation, and retention across multiple channels.While Marketing Technology is a key aspect of this position, you'll also engage significantly in full-stack initiatives within our Growth Product Squad – developing new features, launching experiments, and refining them based on user feedback.You will collaborate within our cross-functional Growth squad, closely engaging with product, marketing, and data teams. Key responsibilities include:Enhancing the ways new users discover, trial, and subscribe to Runna.Executing experiments throughout the user journey, from ad engagement to in-app activation and continued user engagement.Managing the essential tools and integrations that underpin our marketing and lifecycle communications.Our Work CultureWe foster cross-functional, collaborative teams united by shared objectives.Our approach emphasizes iterative development, continuous deployment, and a strong commitment to testing and observability.Expect high autonomy and ownership – you will have meaningful responsibility for growth outcomes and the systems that enable them.

Who Are We? At Ki Insurance, our influence can be seen in various groundbreaking headlines. From insuring space shuttles to world tours, wind farms, and even the legs of footballers, our impact is substantial.Our mission aims to digitally disrupt and transform a 335-year-old industry. Collaborating with Google and UCL, we have developed a platform that leverages algorithms, machine learning, and large language models, enabling insurance brokers to receive quotes in mere seconds rather than days.As the largest global algorithmic insurance carrier, Ki is the fastest-growing syndicate within the Lloyd's of London market, achieving a remarkable $100 million in profit within just three years.Our teams consist of diverse talents working in an agile, cross-functional environment, dedicated to delivering the best possible experience for our customers. With ambitious goals ahead, we seek exceptional minds to challenge the status quo and help us explore new heights.Your Role:As a Senior Full Stack Engineer, you'll be an integral part of our development team, contributing to our broker platform, which is vital to Ki's success. Our multi-disciplinary team combines expertise in software and data engineering, full stack development, platform operations, algorithm research, and data science. We focus on delivering impactful features through an iterative and analytical approach.Your Responsibilities: Develop robust and scalable software for critical web-based applications.Create visually appealing, functional, and efficient web and mobile sites that enhance these applications.Design, build, test, document, and maintain APIs and integrations.Implement quality control through industry-standard practices such as automated testing, pair programming, and code reviews.Collaborate with the Product team to translate end-user requirements into effective technical solutions.Document technical designs and analyses.Evaluate current system architecture for growth and improvement opportunities.Construct mock-ups or prototypes for exploring and troubleshooting new initiatives.Engage with the Product team and UX designers to review designs, implement new features, and ensure an exceptional user experience.Investigate new ideas and emerging technologies, rapidly developing prototypes.Promote and enhance the engineering team’s principles and methodologies.Act as a domain expert for Ki’s core technologies.Mentor and coach colleagues in engineering and business aspects.

Join our innovative team at Faculty as a Senior Full Stack Software Engineer. In this pivotal role, you will leverage cutting-edge technologies to design and implement robust software solutions, driving our mission to harness AI for impactful outcomes. Collaborating with cross-functional teams, you will address complex challenges and deliver high-quality products that meet user needs.If you are passionate about technology, enjoy problem-solving, and thrive in a dynamic environment, we want to hear from you!

Join Trainline as a Full Stack Engineer and contribute to the evolution of digital travel. In this role, you will design and implement scalable web applications that enhance user experiences. Collaborate closely with product managers and designers to shape innovative features that meet customer needs.

Overview Join Tipalti, a dynamic fintech company located in the heart of London, dedicated to automating financial workflows for small and medium-sized businesses. Our engineering culture is robust, collaborative, and focused on making a tangible impact for our clients. As a Senior Full-Stack Engineer, you will merge hands-on engineering skills with a product-oriented mindset. You will define requirements, engage in technical discussions, and influence user experiences while managing the entire software development lifecycle. Responsibilities Develop robust, efficient, and well-tested code across the technology stack. Create new features and enhancements that align with product priorities. Participate in design and architecture discussions, shaping the technical direction. Review code with team members, ensuring clean code practices and quality standards are met. Collaborate closely with Product Managers to clarify requirements and propose solutions. Proactively identify questions, edge cases, and assist in refining specifications. Provide technical insights into prioritization and product decisions. Communicate effectively with designers, engineers, and stakeholders. Share knowledge and mentor colleagues as needed. Engage with external partners and vendors for integration work when necessary. Requirements Experience building across the full stack and a keen interest in learning new technologies. A passion for writing clean, maintainable, secure, and well-tested code. Strong collaboration skills and a preference for team environments. A curiosity about customer needs and the ability to translate them into technical solutions. A commitment to continuous learning and knowledge sharing within the team. Preferred Tech Skills Proficiency in JavaScript / TypeScript, Node.js, and React (or similar frameworks). Experience with REST APIs or microservices architecture. Familiarity with MongoDB. Knowledge of cloud services, particularly AWS. Why Join Tipalti? An open, inclusive, and supportive engineering culture.‍ Opportunities to build products utilized by some of the world’s fastest-growing companies. Equity options in a late-stage scale-up.

Join our dynamic and innovative team at Ratio Recruitment Ltd as a Full Stack Web Developer. In this role, you will utilize your expertise in both front-end and back-end technologies to design, develop, and maintain high-quality web applications. You will collaborate with cross-functional teams to deliver exceptional user experiences while ensuring technical feasibility.

Full-Stack Software Engineer at AmebaJoin Ameba as a Full-Stack Software Engineer and be part of a transformative journey in the supply chain industry. At Ameba, you will have the unique chance to develop innovative software solutions that shape the way products move from raw materials to finished goods. If you're intrigued by the behind-the-scenes mechanics of the world, we want to hear from you!We are a dynamic startup led by seasoned entrepreneurs who have collectively raised over $160 million and come from top-tier companies like Meta, Palantir, and Microsoft. With ambitious goals and strong backing from prestigious investors in Europe, we have secured more than $9 million since our inception just over a year ago.Your Role as a Full-Stack EngineerIn this pivotal role, you will partner closely with our CTO and engineering team to conceptualize, develop, and launch products. You will engage with various technologies across the stack, including front-end development with React and TypeScript, back-end services powered by Kotlin and Python, and machine learning initiatives. Our fast-paced startup environment allows features to go from concept to user-ready in just a week, so you should be comfortable with rapid iterations and eager to create products that resonate with users. Don't worry if you lack experience in certain areas—your enthusiasm and willingness to learn are what matter most!Life at AmebaWe are committed to providing competitive salaries and substantial equity packages to all team members. Our focus is on building a streamlined team of highly skilled individuals, ensuring that we reward them generously.We value collaboration and prefer in-office work five days a week for effective communication, while still offering flexibility for remote work when needed. Our priority is establishing a robust office-first culture at this stage.Enjoy 28 vacation days annually, along with a complete two-week shutdown during the holiday season for everyone to recharge.We offer four months of parental leave at full salary for both maternity and paternity.Our healthcare benefits include comprehensive medical and dental coverage.The salary for this role ranges from £80,000 to £130,000 plus generous equity options.

About UsAt Humaans, we are pioneering the future of workplace infrastructure, developing innovative software solutions for rapidly growing companies that operate on a global scale and are venturing into new territories.What initially began as a basic record-keeping system has transformed into a comprehensive platform designed to manage personnel across the globe. Our agentic AI layer, Athena, enhances our capabilities, enabling intelligent orchestration that connects workflows across HR, IT, Finance, and Operations. This empowers organizations to act promptly and confidently, revolutionizing traditional work methodologies.We collaborate with forward-thinking teams across Europe and the US, ranging from AI-driven firms like Lovable, Poolside, Fyxer AI, and Tandem Health to established high-growth companies scaling through international expansion and acquisitions, including Quantexa, Sellpy, Manychat, Gigs, Croud, and Threecolts. These teams are not just purchasing software for its features; they seek leverage—the ability to operate efficiently and effectively as complexities grow.We are proud to have secured $20 million in venture funding from some of the most esteemed entrepreneurs and investors in the technology sector, including Lachy Groom (Physical Intelligence), Stewart Butterfield (Slack), Tobias Lütke (Shopify), Dylan Field (Figma), Jeff Weiner (LinkedIn), Claire Johnson (Stripe), Oliver Jay (OpenAI), Jay Simmons (Bond), alongside Y Combinator, Moonfire, Frontline Ventures, Pathlight Ventures, and Exor.If you possess a strong ambition and are eager to tackle challenging problems with a nimble team during a pivotal moment in our industry, we invite you to join us.Our Technology StackOur current technology stack includes TypeScript, JavaScript, React, Node, Postgres, and Redis. We utilize GitHub for version control and continuous integration, deploying our services on Kubernetes within the Google Cloud Platform. We offer a public REST API, and our web client employs a real-time WebSocket API. We focus on delivering quality user-facing features and their implementation while maintaining a rapid development pace through concentrated efforts and robust foundational tools.Your ResponsibilitiesContribute to shaping the product from concept to launch.Develop end-to-end features, resolve bugs, enhance infrastructure, and provide customer support.Write backend TypeScript using Node, Postgres, Redis, and Kubernetes.Implement frontend TypeScript in React.Expand our third-party integration marketplace.Participate in technical architecture planning.Assist the sales and marketing teams.

Role Overview Join us as a Full Stack Engineer at Theodo, where you'll have the chance to work directly with clients, including CEOs and co-founders, to understand their unique requirements and develop tailored solutions. You'll engage in hands-on learning from day one, guided by seasoned developers who will mentor you in managing your own projects. As you progress, you'll take on greater responsibilities, mentor junior developers, and become a key technical advisor within your team. If you excel at solving complex problems and are eager to expand your technical skill set while tackling new challenges, this is the opportunity for you.In this role, you will be part of a small, dynamic team focused on creating innovative web and mobile applications for our clients. Collaboration with agile and technical coaches will be essential as you build scalable solutions using the latest technologies.

Join Burendo, an award-winning consultancy renowned for crafting remarkable products and services through cutting-edge technology. We partner with organizations to enhance their value delivery and foster exceptional customer experiences. Our mission is straightforward: to empower organizations to create a meaningful impact on people, society, and the planet by leveraging efficient, user-friendly technology that quickly resolves challenges.At Burendo, we believe in the power of collaboration to achieve extraordinary outcomes.Our unique approach distinguishes us. We pride ourselves on a pragmatic delivery mindset—thinking big, planning effectively, adapting swiftly, and maintaining a sharp focus on results, regardless of the complexity involved. We are passionate about driving innovation, questioning conventional wisdom, and nurturing collaboration at every phase. At Burendo, our commitment to people is central to our mission. We value partnerships, welcome diverse perspectives, and uphold fairness in all interactions. We are eager to share our knowledge, using our expertise to empower others and facilitate long-term success for organizations.We recognize that exceptional engineers come from diverse backgrounds, each bringing unique specialties. At Burendo, we are embarking on exciting new projects, and we seek individuals eager to contribute across the technological spectrum and engage in all phases of the software development lifecycle.

About StackOne:StackOne serves as the AI Integration Gateway for SaaS products and AI Agents. Supported by GV and Workday Ventures with $24M in funding, we empower creators of SaaS platforms and AI Agents to implement hundreds of scalable, precise, and enterprise-grade integrations. Our platform fuses 25,000 pre-mapped actions across 200 connectors, an AI-driven integration development toolkit, and robust security measures, including real-time architecture, managed authentication and permissions, and comprehensive observability.Become part of our rapid journey to redefine the future of agent-driven integrations.With an AI-native integration toolkit that ensures real-time execution, managed authentication, granular permissions, and full observability, all grounded in safety, we are intensifying our focus on AI R&D and establishing our own lab to expand the possibilities of tool calling for agents: training specialized LLMs that excel beyond general-purpose models in critical areas: precision, reliability, and safety in agentic execution.About the RoleWe are seeking adept full-stack engineers who are quick to deliver, possess a systems-oriented mindset, and are passionate about scalability, performance, and usability. You will develop core APIs, enhance infrastructure, and create developer tools and user interfaces that facilitate easy, secure, and predictable tool execution.This role encompasses a wide scope: primarily backend-focused, product-savvy, and highly technical. Anticipate engaging with APIs, authentication, infrastructure, and frontend development to construct the foundational elements that enable agents to take tangible actions.

Join our dynamic team at Faculty as a Full Stack Software Engineer. In this role, you will have the opportunity to work on both the front-end and back-end of our innovative software solutions. You will collaborate with cross-functional teams to design, develop, and maintain applications that enhance our clients' experiences. Your expertise in various programming languages and frameworks will be essential in driving our projects forward.

Yext (NYSE: YEXT) is at the forefront of brand visibility, crafting an ecosystem where discovery and engagement transcend boundaries—spanning AI search, traditional search, social media, websites, and direct communications. With a robust foundation of over 2 billion trusted data points and a comprehensive suite of solutions, Yext empowers brands with clarity, control, and confidence to thrive across digital platforms. Our innovative culture, recognized globally as a 'Best Place to Work' by esteemed organizations such as Built In, Fortune, and Great Place to Work®, invites you to be a part of a team that transforms digital presence into a competitive advantage.The Yext Services team collaborates closely with our largest clients to provide tailored, integrated solutions. Comprising Project Management, Creative, and Development professionals, we excel in addressing diverse challenges and adapting to the evolving needs of our clients. We are currently seeking a Full Stack Software Engineer to develop custom web and backend solutions for our enterprise clientele. Our Agile development environment features one-week sprints, peer code reviews, and individual project ownership from inception to delivery, allowing you to engage with code from day one alongside engineers from prestigious universities and leading tech companies.

Role overview Capimoney is looking for a Staff Full Stack Engineer in London. This role calls for broad experience across both front-end and back-end development. The engineer will help design, build, and maintain scalable applications that support Capimoney’s products and users. What you will do Design and develop software across the stack, from user interfaces to backend services Maintain and improve existing applications for performance and reliability Work closely with teams from different disciplines to deliver software that meets business goals Contribute to the overall user experience and product quality Location This position is based in London.

Role overview jobsforhumanity seeks a Full Stack AI Engineer based in London. This position combines front-end and back-end development to create AI-driven features and enhance user experiences. The work directly contributes to the company’s mission. What you will do Design and build AI solutions for web applications Collaborate with teams from different disciplines to deliver scalable products Participate in all stages of the software development lifecycle, from planning through deployment Use analytical thinking and creativity to address practical challenges with AI Requirements Background in both front-end and back-end development Ability to work with cross-functional teams Strong analytical and creative problem-solving abilities Interest in building AI technologies that serve real-world needs

Hello! Welcome to Team Granola If you haven't yet, we invite you to explore our innovative platform and discover why joining us could be the right move for you.We are on the lookout for a passionate engineer who thrives in a dynamic, fast-paced environment where creativity and innovation are encouraged.In this pivotal role, you will devise new strategies to maximize user satisfaction through the application of LLMs and improve the overall performance of our platform. You will engage directly with users to identify their challenges and tailor solutions that address their needs. As a key member of our founding team, you will play a significant role in scaling Granola to accommodate the next 100x users.Your Responsibilities:Lead the development of user-centric features from conception to launch, focusing on areas such as agentic workflows and real-time collaboration, including innovative prototyping.Enhance the application for optimal performance, ensuring speed, scalability, and reliability.Collaborate with users to understand their needs and design effective solutions.Work alongside a diverse team of engineers, product managers, designers, and other stakeholders to craft a groundbreaking product.Your Ideal Background:Hands-on engineering experience in tech-focused companies.Strong skills in TypeScript, Node.js, and React.js (familiarity with Framer Motion, Tailwind, and Radix is a significant advantage).Solid understanding of relational databases, specifically Postgres.Experience with cloud technologies (preferably AWS and Terraform).As a Person, You:Are a dedicated builder at heart.Enthusiastic about working in our London office most of the time.Enjoy the startup environment, ideally with prior experience in early-stage companies or a strong interest in the zero-to-one phase.Appreciate collaborating with kind, ambitious, and practical individuals.Have a keen interest in AI/ML, though direct experience is not mandatory.Thrive in a fast-paced atmosphere where priorities and requirements are ever-evolving.Join us in revolutionizing the way users interact with technology!

Full Stack Software EngineerLocation: London (Remote)About SwapAt Swap, we are revolutionizing the future of commerce with our AI-native platform that seamlessly integrates backend operations with a cutting-edge storefront experience. Our innovative solutions empower brands to sell products globally, streamline operations, and make informed decisions with real-time data analytics.Our comprehensive product offerings include cross-border solutions, tax management, returns logistics, and demand planning, enabling merchants to operate with full transparency and confidence.Join us as we cultivate a culture driven by clarity, creativity, and shared ownership, redefining the landscape of global commerce.Role OverviewWe are seeking a passionate Full Stack Software Engineer to become a vital part of our expanding engineering team during an exciting period of rapid growth. You will play a key role in shaping the future of our products, building them from the ground up. The ideal candidate will have a strong enthusiasm for crafting elegant software solutions and will stay updated with the latest development tools and libraries, ensuring the best choices are made for each task. Our engineers are expected to contribute across the entire product stack and maintain the integrity of our codebase while collaborating closely with product managers, designers, and other teams.Key ResponsibilitiesDeveloping scalable, robust, and maintainable code that meets performance standards.Translating software requirements into high-performance applications.Participating in architectural and design decisions to promote efficient structures.Creating design documentation and project estimates.Developing unit tests to ensure code quality.Utilizing AWS for application deployment, monitoring, and scaling.Collaborating with cross-functional teams to gather technical requirements and translate them into actionable tasks.QualificationsProven experience as a Full Stack Engineer.Strong proficiency in modern web frameworks and languages.Experience with cloud services, particularly AWS.Ability to work collaboratively in a team environment.Excellent problem-solving skills and attention to detail.