Full Stack Software Engineer

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 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.

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!

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.

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.

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.

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!

Hello! Who are we?At Ki Insurance, our innovations are making headlines globally. From insuring space shuttles and world tours to safeguarding wind farms and even footballers’ legs, we cover it all.Our mission? To disrupt and revolutionize a market that has existed for 335 years. In collaboration with Google and UCL, we have developed a cutting-edge platform that utilizes algorithms, machine learning, and large language models to provide insurance brokers with quotes in mere seconds instead of days.As the largest global algorithmic insurance carrier and the fastest-growing syndicate in the Lloyd's of London market, we proudly achieved $100 million in profit within three years.Our diverse teams collaborate in an agile, cross-functional environment, striving to create the ultimate customer experience. With big ambitions ahead, we need brilliant minds to help us challenge the status quo and reach new heights.What’s your role?As a Staff Full-Stack Engineer on our Engineering team, you'll provide technical leadership for delivery squads and the broader engineering organization. Together with our engineering leadership, you will uphold engineering excellence and maintain high-quality standards through a culture of continuous improvement. You'll be hands-on, delivering impactful software directly and leading initiatives independently.Your responsibilities will include:Creating robust and scalable software for critical web-based applications.Developing engaging, efficient, and reusable web and mobile sites that enhance our applications.Designing, building, testing, documenting, and maintaining APIs and integrations.Implementing quality control measures through automated testing, pairing, and code reviews.Collaborating with the Product team to translate end-user requirements into effective technical solutions.Documenting technical designs and analyses.Evaluating current system architecture to identify areas for growth and improvement.Building mock-ups or prototypes to explore and troubleshoot new initiatives.Working closely with Product teams and UX designers to ensure top-notch user experiences.Exploring new ideas and emerging technologies to develop prototypes rapidly.Fostering a culture of continuous improvement throughout the team.

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.

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.

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

(Applicants must be based in London, UK)About the RoleWe are on the lookout for talented and driven Full Stack Engineers to join our innovative team at Herondata. As a pivotal member of our fast-growing AI startup, you will play a crucial role in crafting elegant technical solutions that address our customers’ diverse challenges. If you are passionate about delivering high-quality code and are eager for a rewarding new challenge, we want to hear from you!Key ResponsibilitiesIn this hands-on role, you will focus on developing products that provide real solutions for our customers. Your responsibilities will include:Creating, maintaining, and enhancing backend services and APIs.Developing and designing new UI and web components.Integrating with third-party services and AI models.Assisting in bug triage, investigating production incidents, and contributing to postmortems and root cause analyses.Engaging in code reviews and collaborating with both technical and non-technical teams and stakeholders.What We SeekOur ideal candidate will:Be passionate about building impactful solutions: You enjoy shipping code rapidly, valuing MVPs and customer outcomes more than perfection. You take ownership of the deployment of your work.Excel at solving complex technical challenges: You can break down problems into simple, effective solutions, maintaining a fact-based and thoughtful approach.Focus on scalability: You prioritize impactful action while ensuring scalable infrastructure and engineering processes. You bring innovative practices to improve our systems.Contribute within our tech stack: We are currently utilizing Python/Flask/FastAPI for the backend, Terraform/GCP/AWS for infrastructure, and React/JavaScript/TypeScript/Vercel for the frontend. Your ability to contribute and enhance our stack is essential.

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.

About the Role Abound is hiring a Senior Full Stack Engineer in London. This position focuses on building and improving web applications, working across both front-end and back-end systems. The team values practical solutions and a collaborative approach. What You Will Do Design and implement scalable web applications Work with cross-functional teams to deliver new features Contribute to both front-end and back-end development Help create a strong user experience through thoughtful engineering What We’re Looking For Solid experience with both front-end and back-end technologies Comfort working closely with colleagues from different disciplines Ability to deliver reliable, maintainable code

Become Our Foundational Engineering Leader at Civic Marketplace!Are you driven by the potential of technology to foster significant change within communities? At Civic Marketplace, we are innovating the process by which local governments acquire and provide essential services, crafting the most user-friendly and effective procurement platform for the future.Why Choose Civic Marketplace?We are a mission-oriented startup dedicated to reshaping the operational landscape for local governments—eliminating obstacles, streamlining workflows, and ultimately enhancing outcomes for citizens. If you thrive in a startup environment and wish to join a purpose-driven team effecting genuine change, this role is tailored for you.Who We’re Seeking:We are in search of our inaugural engineering hire—a proactive technical leader prepared to take full ownership of our technology landscape. You will spearhead our technical vision, enhance our codebase, and assemble a high-performing team to achieve our ambitious objectives. You will be a pivotal figure in our expanding organization, with the autonomy to define our technological strategy and architecture.Key Responsibilities:Lead the execution of our full-stack development initiatives, ensuring seamless ownership of code from inception to deployment. You will be our full-time lead engineer, collaborating with teams to facilitate execution through the establishment of effective processes, setting clear expectations, managing risks, resource allocation, and removing impediments.Craft a quality assurance playbook for your teams, establishing standards for code reviews, pull requests, testing, and monitoring. You will actively contribute to coding while also delegating tasks and hiring talent as necessary, including working with freelancers.Demonstrate proficiency in REACT, marketplace dynamics, payment infrastructure, and hybrid development approaches utilizing both custom and no-code/low-code solutions.Ensure your team manages the operation of data, systems, and applications in production, driving the resolution of critical issues through root cause analysis.Foster hiring, motivation, and professional growth among team members by developing a deep understanding of their motivations, strengths, and growth opportunities. Align personal growth opportunities with organizational impact.

Join Faculty as a Full Stack Software Engineer and be part of a dynamic team that is pushing the boundaries of technology. We are looking for an innovative and driven individual who thrives in a fast-paced environment and is passionate about building scalable applications.As a Full Stack Software Engineer, you will work on both front-end and back-end development, collaborating closely with cross-functional teams to deliver high-quality software solutions that meet our clients' needs.