Full-Stack Engineer for AI Safety Products

Application Deadline: We are actively interviewing and looking to fill this position promptly with the right candidate. EXCITING OPPORTUNITYBecome a pivotal member of our newly established AGI Safety Product Team at Apollo Research. In this Full Stack Engineer role, you will collaborate directly with our CEO, who also serves as Head of Product, alongside oth…

Join Scale’s rapidly expanding Global Public Sector team, dedicated to leveraging AI to tackle significant challenges faced by the public sector globally. Our primary focus includes:Developing tailored AI applications that positively influence millions of lives.Producing high-quality training data for specialized large language models (LLMs).Providing upskilling and advisory services to maximize AI’s impact.As a Full Stack Software Engineer (Forward Deployed), you will work closely with public sector partners to swiftly create full-stack AI applications that address their most urgent needs and deliver substantial benefits to citizens.At Scale, we’re not just crafting AI solutions; we’re empowering the public sector to modernize their operations and enhance citizen services through innovative technology. If you’re eager to help shape the future of AI in the public sector and become a core member of our team, we want to hear from you.

About the Role:We are seeking a talented full stack developer with a classical engineering background who is eager to make a significant impact. Join our mission to revolutionize service delivery and enhance funding opportunities for the charity sector.Apply here.What We Are Looking For:Experience is not the only indicator of talent. Ideally, you have a history of employment and have successfully delivered a product independently from concept to completion. This position is ideal for those who strive for excellence in their work.Our goal is to create an engineering team with a high weight-to-power ratio. You will not be bogged down by excessive meetings; there are no daily scrums or mandatory design documents. Our focus is on delivering quality software quickly to our users.When we refer to a 'Classically trained software engineer', we envision a candidate with a comprehensive understanding of software engineering principles, preferably someone with a Computer Science degree. We want a versatile individual who can navigate between frontend, backend, and DevOps, or is confident in their ability to do so. Broad skill sets are favored over niche expertise.We are flexible regarding the use of AI tools; if you find a unique solution to a client’s issue while traveling, we fully support your approach as long as the code is robust.

Our MissionAt Omnea, we are transforming the way enterprise businesses function, focusing on the most challenging aspects: procurement. Here, a single purchase can extend for months, entail over 50 emails, and involve multiple departments such as Finance, Legal, Security, and IT just for approval.With an investment of $75M from Khosla Ventures, Insight Partners, and Accel, we aim to revolutionize this process. Our AI-driven platform integrates all stakeholders, ensuring that buying is swift, secure, and efficient. It offers a centralized location for requests, automated approvals and renewals, real-time supplier risk assessment, and complete visibility into spending.The procurement sector represents a $7B+ untapped market, and our growth underscores the opportunity: we have increased our annual recurring revenue (ARR) tenfold to double-digit millions within just 18 months and gained the trust of large enterprises like Spotify, MongoDB, Monzo, and Albertsons. We are now recognized as the 4th fastest growing startup in Europe.Our team previously scaled Tessian (a leading cybersecurity technology company supported by Sequoia, Balderton, and Accel, acquired after Series C), comprising ex-founders and operators who have successfully grown unicorns, delivered top-tier products, and achieved outstanding execution. You will collaborate with industry leaders including Ben, Abs, Sabrina, and Rebe.What We're Looking ForWe seek talented, product-focused full-stack software engineers to drive Omnea's next growth phase.In the past 18 months, we have accelerated our revenue tenfold, tripled our customer base, and maintained a retention rate exceeding 99% with enterprise clients such as Spotify, Wise, Albertsons, Adecco, and McAfee. Our talent standards are exceptionally high — it took over 10,000 interviews to recruit our first 50 team members. We are now expanding from a low double-digit count to over 200 enterprise clients, aiming for another tenfold increase in revenue in the next 2 to 3 years.This is an exciting opportunity to join us at a pivotal moment: we have achieved product-market fit, yet there is still ample room for you to influence our trajectory.

Role Overview Cato Networks is hiring a Full Stack Engineer in London to support the development of cloud-based security products. This role focuses on building and improving scalable applications that serve clients worldwide. What You Will Do Work with teams across disciplines to define, design, and deliver new product features Develop and enhance applications for performance, scalability, and reliability Troubleshoot and debug issues in both front-end and back-end components Ensure applications respond quickly and handle client requests efficiently Location This position is based in London, England, United Kingdom.

Corgi builds insurance products for tech startups, using AI to drive its platform and underwriting. With $108 million raised and a carrier license in place, Corgi operates with regulatory approval and is expanding into the UK and EU. The core technology stack includes Django and Stripe for payments. Role overview This Full-Stack Software Engineer position is based in London. The work centers on building and deploying products independently, rather than following detailed roadmaps. Candidates who have shipped real products, whether side projects, weekend builds, or anything with actual users, will stand out here. What we look for Engineers who take ideas from concept to live product, hands-on. Proven experience shipping projects independently. Comfort working across the stack and adapting quickly to new challenges. Focus on achieving results in hours and days, not just over long sprints. Openness to feedback and new approaches, paired with strong opinions. Low-ego, outcome-driven mindset. How we work Decisions happen quickly, waiting for perfect solutions is not the norm. New products and changes go live regularly, not just quarterly. Shipping and iterating take priority over lengthy review cycles. Intensity remains high during both launches and quieter periods. Transparency matters; decisions are made openly. Internal competition is encouraged to raise the bar for everyone. This is a build-focused role. Coasting is not part of the culture. Behaviors that won't fit Office politics, gossip, or avoiding responsibility. Taking feedback personally rather than using it to improve. Adding unnecessary complexity instead of simplifying. Missing deadlines after making commitments. How to apply Share links to GitHub, personal sites, live projects, or any deployed products. CVs are not accepted. Email applications to: sergio@corgi.com If you cannot provide evidence of shipped work, this role is likely not a match. Location and compensation London-based, with on-site or hybrid options. Base salary: £75,000 to £140,000, plus equity. The salary range reflects a focus on demonstrated ability to ship, not job titles.

Join Scale's rapidly expanding Global Public Sector team dedicated to leveraging AI to solve pressing challenges within the public sector worldwide. We focus on:Developing tailored AI applications that will positively affect millions of citizens.Producing high-quality training data for bespoke LLMs.Providing upskilling and advisory services to amplify AI’s impact.As a Senior Full Stack Software Engineer (Forward Deployed), you will work closely with public sector partners to swiftly develop full-stack AI applications that address their critical issues and create significant benefits for citizens.At Scale, we are not merely creating AI solutions—we are empowering the public sector to innovate their operations and enhance citizen services through advanced technology. If you are eager to influence the future of AI in the public sector and become a pivotal member of our team, we would love to connect with you.

Join Our Team at 9finAt 9fin, we are revolutionizing the global debt markets with our cutting-edge AI platform, addressing a massive asset class valued over $145 trillion.Despite the extensive and critical nature of debt markets, they have historically relied on fragmented data sources, PDFs, and manual processes. Our innovative solution consolidates proprietary credit data, in-depth analyses, and efficient workflows, creating a unified platform for global market operations.Currently, more than 300 prestigious institutions, including leading global banks, asset managers, private equity firms, law firms, and advisory firms, utilize 9fin. Our rapid growth, particularly in the US market, is supported by an exceptional retention rate, driven by our comprehensive workflow adoption.We are at a pivotal moment in our journey, with strong product-market fit and a burgeoning global demand, positioning 9fin to become the leading platform for debt markets worldwide.Your Role and ResponsibilitiesCollaborate within a cross-functional team to design systems, create proof of concepts, and implement new features, including APIs, data processing, and automation, while working closely with Product and Client teams.Engage in development and engineering for backend services and web application tools within the 9fin platform.Act as a vital contributor in project teams by participating in code reviews, engaging with peers, and offering innovative ideas during research and experimentation with new technologies.Enhance the 9fin codebase by identifying opportunities for automation, refactoring, and documentation to increase efficiency.Work across a variety of web platforms, including financial data modeling, access-control logic, environmental data capture, integration with ML/AI services, data visualization, and automation systems.Foster collaboration and effective teamwork, engaging with domain experts from 9fin’s financial, legal, and editorial departments, and clearly communicating technical concepts to non-technical stakeholders.Benefit from a robust developer experience framework, featuring automated preview environments, feature flags, and well-maintained non-production environments, facilitating rapid iteration and feedback.

At Solve Intelligence, we are not merely developing features; we are shaping the foundational infrastructure that aims to revolutionize the global legal and IP landscape. The Role: Full-Stack Engineer (Back-End Focus)We seek an exceptionally skilled engineer to assist in the rapid development of both the front-end and back-end of our innovative products. You will join a lean, highly talented engineering team based in London.Key Responsibilities:Foundation Scaling: Design and construct robust and scalable backend systems from the ground up to cater to a vast global market.User-Centric UI: Collaborate on planning and refining our React-based front-end to ensure our sophisticated AI systems are user-friendly and widely embraced.Product Development: Work alongside the founders to derive insights from customer feedback and translate them into actionable technical solutions.Culture Building: Contribute to establishing the engineering culture and play a critical role in building a top-tier technical team. About Solve IntelligenceWe are a rapidly growing startup redefining how IP professionals operate.Growth: Enjoying a 20-30% month-over-month revenue increase while serving over 100 IP teams (ranging from DLA Piper to premier tech boutiques).Proven Efficiency: Users report efficiency improvements ranging from 50-90%.Investment: Recently highlighted in Sifted following our $40M Series B funding round, bringing our total funding to $55M from notable investors including Y Combinator, 20VC, Visionaries, and others. Your TeamYou will collaborate directly with a founding team comprising AI PhDs and systems specialists:

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 the innovative team at Seaport Global as a Full-Stack Engineer, where your expertise will play a crucial role in shaping our cutting-edge projects. We are looking for a driven individual with a solid academic foundation in Computer Science, Engineering, or Data Science, complemented by practical experience in developing sophisticated systems. This position is perfect for someone who is enthusiastic about crafting clear, efficient, and maintainable code using the latest technologies and best practices. As an early member of a rapidly expanding organization, you will have the chance to make a significant impact and witness fast-paced professional development.

Ebury empowers ambitious businesses to unlock global growth, championing the same ethos for our team members. We foster a culture of innovation, collaboration, and problem-solving, creating an environment where everyone feels valued, supported, and empowered to thrive.If you are a collaborative spirit eager to revolutionize global business operations, we invite you to connect with us. We would love to discuss how Ebury can propel your career forward and enable you to shape the future.Senior Full Stack Engineer (Cards)Hybrid Work Model - 4 days in the office, 1 day remoteWe are seeking a Senior Full Stack Engineer to join our rapidly expanding Cards team. In this role, you will engage with innovative fintech products, addressing customer challenges through data-driven solutions and an entrepreneurial mindset. We are looking for a candidate who is endlessly curious, passionate about continuous learning, and adept at selecting the right tools for the task at hand, irrespective of the programming language or framework utilized.What We Provide:Attractive salary and comprehensive benefits package.Professional development opportunities within a leading European fintech firm.Significant ownership and visibility within a vital business initiative.A collaborative, open, and dynamic workspace.The opportunity to influence how global businesses connect with Ebury.Key Responsibilities:Lead the design and implementation of intricate features for customer-facing web applications.Possess experience in FinTech, banking, or a closely related sector, with a solid grasp of financial systems and development within a regulated environment.Drive frontend development using React/VueJS, alongside backend development with Python.Work with data engineers to design, construct, and optimize robust data pipelines for analytics and machine learning.Manage the entire product lifecycle, encompassing development, maintenance, monitoring, and alerting.Mentor junior engineers and promote technical excellence.Collaborate across departments to deliver impactful solutions.Contribute to the technical roadmap, identifying areas for innovation.Ensure code is easily testable with comprehensive test coverage.Stay informed about emerging technologies.This role may require occasional on-call duties.

At Zoopla, we adopt a hybrid working model, dedicating three days a week to our Tower Bridge office.As one of the UK’s leading property brands, Zoopla is recognized and trusted by over 91% of the population, and we are committed to winning over the remaining 9%. Our mission is to empower individuals to make informed home decisions by connecting them to personalized insights for moving, managing, or financing their homes. With over 50 million monthly visitors, Zoopla provides exclusive data and comprehensive listings on every UK property, including over 500,000 homes for sale and rent, helping users find the best agents and secure competitive mortgage deals.We are a vibrant and growing team that thrives on innovation and is eager to redefine the digital property landscape. Join us in transforming how the nation approaches home decisions.Position Overview: Full-Stack EngineerAs a Full-Stack Engineer at Zoopla, you will enhance the consumer portal experience, developing a high-performance website and various services. If you thrive in a commercially-focused organization and are passionate about core web vitals, developer experience, APIs, pipelines, personalization at the edge, or crafting delightful UIs with the latest CSS techniques, we want to hear from you.At Zoopla, we utilize a diverse array of technologies, and while we don’t expect you to be proficient in all of them, we welcome your expertise in even a few of the following:On the frontend, you will work with React, React Native, Nx, Vercel, and TypeScript. On the backend, we employ Node.js, Next.js, GraphQL (all in TypeScript), as well as Golang and Python. We are particularly seeking candidates who are skilled in React Native to enhance our mobile application experience. Our data architecture includes both SQL and NoSQL databases, and you will be supported by our data and Core Infra/Platform teams while engaging with AWS, GitHub/GitLab, CI, and increasingly serverless technologies.A flexible approach across various layers of the stack is essential for this role. If you are eager to expand your full-stack development skills, we are here to support your growth.

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.

Join our dynamic team at bbc-maestro, a leading SME with a global clientele, as a Senior Full Stack Engineer. Your primary mission will be to enhance and maintain our core platforms while collaborating with a talented group to craft scalable software that truly resonates with our users.In this role, you will actively engage in building and maintaining our Ruby on Rails platform and React Native mobile app infrastructure. You will also play a pivotal role in shaping our technical direction, mentoring your teammates, and ensuring high-quality delivery.This position is ideal for individuals who thrive in environments that encourage autonomy, love tackling real-world user challenges, and wish to have a hand in guiding technical decisions while remaining immersed in coding.You will report directly to our Engineering Manager.

Join Our Innovative Team as a Full Stack EngineerAt Unity Advisory, we are pioneering the future of professional services in an AI-driven landscape. Our firm operates on a lean, conflict-free model that prioritizes client success and integrates advanced technology throughout all our processes.With no audit practice, we are unburdened by traditional conflicts and legacy structures, enabling us to act swiftly and collaboratively. Our flat organizational structure fosters an environment where talented individuals can excel and create significant value for our clients.We blend deep advisory knowledge with state-of-the-art data, AI, and commercial insights, helping our clients tackle complex challenges with speed, intelligence, and clarity. At Unity Advisory, we are transforming the delivery of expert advisory services through innovative engagements.Your RoleWe are in search of a skilled Full Stack Engineer to become a vital member of our team, focusing on the development of our Core Internal AI Platform.In this internal-facing role, you will create end-to-end software solutions that support AI-enabled tools and workflows utilized across our firm. Your responsibilities will encompass frontend, backend, and platform layers—designing, building, and maintaining production-grade systems that incorporate data, AI features, and user-facing applications.This hands-on position is ideal for an individual who takes ownership of features from initial concept to final deployment and thrives in a dynamic, high-responsibility environment.Key ResponsibilitiesDesign, develop, and maintain comprehensive full-stack applications to enhance our internal AI platform and workflows.Create scalable backend services, APIs, and data integrations that drive AI-powered functionalities.Develop user-friendly and high-performance interfaces that enable users to interact with complex, data-driven, and AI-integrated systems.Incorporate AI and data features into applications and internal tools seamlessly.Work collaboratively with AI engineers, data engineers, and product stakeholders to deliver cohesive end-to-end solutions.Implement strong engineering practices across all stages: development, testing, deployment, monitoring, and observability.

At GetGround, we strive to revolutionize property investment, making it safer, quicker, and more accessible for landlords. Our belief in AI's transformative power drives us to enhance the landlord journey, reimagining the entire process of property investing. Our vision is to disrupt the £1.7 trillion UK asset class, creating a future of buy-to-let that is distinctly innovative.We delve into the ideas, predictions, and data trends that will shape this evolving landscape and their implications for landlords and the PropTech industry.Our core values—no BS, pursuit of excellence, feedback obsession, and healthy ego—form the foundation of our culture, inspiring our team to deliver a world-class investment experience for our users.By the Numbers: 85+ GetGrounders (ex Google, Meta, Deliveroo, Startups) £2bn+ of assets under management 30,000+ users across 70 countriesSeries A with a strong runwayYour Role:As a Senior Full Stack Engineer, you will craft innovative solutions in a dynamic environment where technical excellence meets product thinking. Join one of our cross-functional product teams in London, collaborating closely to develop user-facing AI-native products that redefine software development.Our Work Culture:At GetGround, we prioritize AI not just in our products, but also in our coding practices, system reasoning, and professional growth as engineers. We seek Full Stack Engineers who are enthusiastic about collaborating across the technology stack and comfortable utilizing AI tools throughout both the discovery and delivery phases.What Matters to Our Engineers:Commitment to technical excellence, supported by rapid feedback loops and AI-enhanced workflows.Clear and thoughtful communication across code, documentation, and discussions.Eagerness to contribute to a high-performing team culture.

Join Us in Revolutionizing the Fashion Supply Chain!Did you know that the fashion industry generates over 100 billion garments each year, with a staggering 60% ending up in landfills? This occurs not due to a lack of demand but because the current supply chain for secondhand fashion is outdated, manual, and disorganized.At Fleek, we are on a mission to transform this broken system. Our goal is to make secondhand fashion the primary choice, and we are building the infrastructure that will power the global secondhand clothing market. This includes a B2B marketplace and advanced AI systems that will digitize the supply chain.With Fleek, vintage stores, online resellers, and retail buyers can easily source graded secondhand inventory directly from wholesalers and rag houses across various countries. Our innovative tool, FleekSort, utilizes AI to grade, price, and categorize items with just a photo, turning a historically opaque trade into a clear, searchable, and tradable global inventory.Since our inception in 2022, we've successfully diverted 9 million items from landfills and have experienced remarkable growth, tripling in size annually. We have secured approximately $50 million in funding from prestigious investors like a16z, Y Combinator, Burda Principal Investments, and HV Capital. Our advisory board boasts industry leaders from renowned companies such as Depop, Shopify, and Postmates.Today, we cater to thousands of resellers and retailers across the UK, Europe, and the US. As the secondhand fashion market is projected to reach $350 billion by 2027, Fleek is establishing the AI-driven operational and financial backbone for secondhand commerce on a global scale.We are looking for passionate individuals who are eager to create meaningful change and thrive in a fast-paced environment. If this excites you, read on!About the RoleAs a Senior Full Stack Engineer in our product engineering team with a focus on frontend development, you will report directly to our CTO, Sanket Agarwal (formerly of Google and Postmates). You'll collaborate closely with a product manager and designer within a small, senior team dedicated to enhancing user growth and optimizing the core consumer experience.Why This Role is UniqueAt Fleek, we are creating a vibrant, video-first marketplace where each item is one-of-a-kind, supply is unpredictable, and the purchasing experience must cater to both professional resellers making high-volume decisions and first-time buyers venturing into an entirely new market.You will be part of our Growth team, reimagining core user journeys from scratch, enhancing the discovery experience, streamlining the buying flow, and improving seller onboarding.

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

At Thought Machine, we are on a daring mission to eliminate outdated technology from banks around the world. Our innovative core and payments technologies, designed to operate seamlessly in the cloud, are shaping the future of banking.Since our inception, we have rapidly expanded to a talented team of over 550 professionals across various locations including London, New York, Singapore, Sydney, and our new Engineering Hub in Lisbon. With over £500m in funding from esteemed investors such as Molten Ventures, Eurazeo, and JPMorgan Chase, we are well-positioned for continued growth.We pride ourselves on fostering a vibrant workplace culture that encourages creativity and excellence. Recognized by Sifted magazine for our exceptional Glassdoor ratings and generous employee share packages, we are also honored to be named one of the world's most innovative fintechs by Global Finance Magazine and acknowledged by the Financial Times as one of Europe’s fastest-growing companies for two consecutive years.As a Full Stack Engineer at Thought Machine, you will play a vital role in our engineering team, which is committed to adopting best practices and leveraging modern technologies. You will tackle complex engineering challenges and create robust, scalable, and secure code that ensures an exceptional user experience.You will take full responsibility for transforming requirements into engineering designs, task breakdowns, and implementations, building both backend services and frontend experiences. Your work will cater to a diverse range of clients, from large financial institutions to regional banks, allowing for customized user experiences tailored to various personas.This is a full-time, permanent position based in our London office, requiring a minimum of three days onsite each week while offering the flexibility to work four days a week.