Full Stack Engineer at 9fin | London

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 proprie…

About the Opportunity Join Contentful as a Full Stack Software Engineer and drive innovation through Automations, Workflows, and Collaboration Tools. Become an integral part of the pioneering team at Contentful, a platform that empowers thousands of customers to manage and scale their content effectively. We are looking for enthusiastic Full Stack Software Engineers who are eager to create high-performance applications using cutting-edge technologies. If you are excited about transforming the realm of Automations, Workflows, and team collaboration within the Contentful ecosystem and possess experience with TypeScript, React, and Node.js, we invite you to join our team. What to Expect? Collaborate and Innovate: Work in close partnership with product managers, designers, and fellow engineers to develop top-tier automation, workflow, and collaboration features for our clients. Full Stack Development: Design, develop, and maintain scalable features across both frontend and backend using TypeScript, React, and Node.js. Collaboration Tools Integration: Implement and integrate collaboration technologies to boost team productivity and enhance user experiences across the platform. Holistic Thinking: Approach projects with a comprehensive view, considering all components and systems to enhance the user experience. Rapid Problem-Solving: Swiftly address bugs and issues to improve customer satisfaction. Data-Driven Development: Leverage analytics to inform product decisions and refine features. Continuous Improvement: Engage in code reviews and contribute to enhancing our development processes. Stay Current: Remain updated on the latest industry trends, particularly in automations, workflows, and collaboration tools.

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.

Join our client, a prominent arts venue situated in the vibrant heart of London, as an accomplished Full Stack Developer specializing in PHP Symfony2. This exciting opportunity allows you to contribute your expertise to a team dedicated to creating projects that are both technologically advanced and visually stunning.In your role as a Full Stack Developer, you will oversee projects from their inception through to their completion, ensuring they meet the highest standards of quality and innovation. Your ability to navigate complex digital landscapes will be invaluable.

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.

Join our dynamic team as a Full-Stack Engineer specializing in Python and TypeScript. In this role, you will contribute to innovative projects that drive our technological advancements, ensuring seamless integration across platforms. You will collaborate with cross-functional teams to deliver high-quality software solutions that meet user needs and exceed expectations.

We are seeking an experienced Senior Full Stack Java Developer to join our dynamic team at Version 1. As a key player in our Apps Modernisation & Integration department, you will leverage your expertise in Java development to build robust applications and integrate innovative solutions that meet our clients' needs.Your role will involve collaborating with cross-functional teams, guiding junior developers, and ensuring best practices in software development. You will work with modern technologies and methodologies that enhance our project delivery.

(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.

Corgi builds insurance products for tech startups, using artificial intelligence to power underwriting and streamline processes. The company operates as a fully licensed carrier, has raised $108M, and is expanding into the UK and EU. The platform relies on Django and Stripe, with a focus on fast, AI-driven solutions. Role overview This Full-Stack Engineer position is based in London. The team values people who turn ideas into working products, whether through side projects, weekend builds, or tools that real users rely on. Engineers here often work independently, taking projects from concept to deployment without waiting for a detailed roadmap. Self-starters who enjoy building and shipping quickly will feel at home. Requirements Track record of independently developing and launching projects that reached users Comfort working across the stack, especially with Django and Stripe Ability to deliver results in hours or days, not long cycles Adaptability and willingness to change direction as needed Strong opinions, paired with openness to better solutions Focus on outcomes and results over job titles How we work Decisions happen quickly, prioritizing action over perfection Products and process changes launch regularly, not just on a quarterly basis Ship-and-iterate mindset: feedback and improvement come after launch High energy is expected during product pushes and quieter times Transparency: decisions are made openly Internal competition is encouraged, with top performers raising the bar This is a hands-on role for builders who want to make an impact. Behaviors that lead to removal Office politics, avoiding responsibility, or gossip Taking direct feedback personally instead of constructively Adding unnecessary overhead instead of streamlining Missing deadlines after committing to them How to apply Send links to GitHub, personal sites, live projects, or shipped work Resumes are not accepted Email applications to: sergio@corgi.com If you cannot show shipped work, this role is not a fit Location and compensation London-based, with on-site or hybrid options Base salary: £75,000 to £140,000, plus equity Compensation is based on ability to ship, not job titles

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 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.

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.

Role Overview Position: Senior Full Stack Developer (Java/React) with Security Clearance Eligibility Location: London, UK (Hybrid – 1 to 2 days per month in the office) Contract Type: Permanent, Full-time Compensation: £70,000 - £80,000 base salary, plus 10% bonus, 10% equity, and benefits About Appvia Appvia delivers consultancy in cloud, platform, and solutions engineering. The company helps organizations modernize software systems, improve developer productivity, and adopt cloud-native methods for sustainable delivery. Appvia works on complex, high-impact projects across public and private sectors, focusing on quality, scalability, and reliability. Areas of expertise include modern application development, domain-driven design, and optimizing architecture and testing for better delivery outcomes. What You Will Do Senior Full Stack Developers at Appvia join a growing software engineering team, supporting a large modernization and AI-driven transformation project. The work is hands-on and client-facing, involving the design and implementation of modern software solutions in complex environments. Projects often involve building new systems within existing legacy landscapes, introducing new architecture, tools, and engineering standards for long-term scalability. This role reports to a Principal Software Engineer and contributes to both project delivery and the ongoing development of Appvia’s engineering practice. Requirements Eligible for UK Security Clearance (SC), which requires: British Passport or Indefinite Leave to Remain (ILR) Residency in the UK for the past five years No criminal record or financial irregularities Extensive experience with React and modern front-end development Strong back-end development skills with Java (Spring Boot) Knowledge of Domain Driven Design (DDD) Experience working with microservices architecture Full-stack experience across UI, API, and data layers Background in cloud-native environments, preferably AWS Interest or experience in AI-assisted development to boost productivity and quality Comfort working directly with stakeholders and guiding teams Interview Process Initial discovery conversation with Talent Acquisition Technical interview with the Engineering Team Final interview with Leadership

Join our dynamic team at hyperexponential as a Full Stack Engineer, where you will be instrumental in developing innovative software solutions using Kotlin and React. This role involves collaborating with cross-functional teams to design, implement, and maintain high-quality web applications that meet our clients' needs. You will have the opportunity to work on exciting projects that push the boundaries of technology while fostering your professional growth.

Join our dynamic Platform Performance team as a Full-Stack Software Engineer with 2–4 years of experience, and help us create fast, scalable solutions for millions of users globally.In this role, you will engage in all aspects of the software stack—enhancing frontend performance, optimizing backend services, and improving the responsiveness, reliability, and overall user experience of our interfaces. You will collaborate with a dedicated team of engineers and product managers to identify performance bottlenecks, contribute to architectural enhancements, and help advance our design system.This position is a fantastic opportunity for a driven engineer who is eager to expand their skillset in a fast-paced environment and make a significant impact at scale.Freelancer.com is the largest freelancing and crowdsourcing platform in the world, connecting over 80 million users across 247 countries and territories. Our platform empowers businesses, entrepreneurs, and individuals to collaborate with skilled professionals globally, turning ideas into reality more efficiently than ever.Our ambitious mission is to create one billion jobs worldwide by enabling people to work for themselves and build sustainable online careers. Every feature we develop and every performance enhancement we implement brings us closer to realizing this unprecedented opportunity.

Join a Transformative CompanyAt Palantir, we are pioneers in crafting the world's foremost software for data-driven decision-making and operational efficiency. Our innovative platforms connect vital data with those who require it, empowering our partners to develop life-saving pharmaceuticals, anticipate supply chain disruptions, locate missing children, and much more.Your RoleAs a Full Stack Engineer specializing in application development within Palantir Foundry, you will play a crucial role in shaping tools utilized by thousands to create advanced applications that drive their enterprises. You will design and implement user interfaces, manage state, and establish access patterns to facilitate data-intensive workflows that are both powerful and user-friendly. Your responsibilities may include interviewing users to comprehend their needs and identifying areas for product enhancement, as well as collaborating with colleagues to devise solutions for complex user experience challenges across various sectors.Daily, you will tackle intricate technical challenges, defining solution designs and incrementally delivering new features. You will take ownership of APIs and schemas that empower your front-end functionality, or collaborate with back-end engineers to develop them collectively.We seek engineers who are passionate about addressing real-world challenges and enabling both application builders and end-users to work at their best. Here are some examples of the impactful product work you will engage in:Frontline ProgramAs a Foundry Software Engineer, you may have the unique opportunity to participate in the Frontline program. This exclusive, short-term assignment places you directly with customers, allowing you to collaborate with users and gain invaluable insights into product applications and the challenges faced by our clients. Unlike conventional engineering roles, Frontline immerses you in complex, ambiguous problems, empowering you to deliver significant solutions across some of the world’s most critical industries and institutions.

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.

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.

About YASOYASO serves as the ultimate operating system tailored for international brands entering the Chinese market, crafted by a dedicated team of experts in China, technology, and startup operations. Our innovative plug-and-play solution seamlessly manages the entire spectrum of cross-border ecommerce and social commerce, encompassing store operations, pricing strategies, influencer collaborations, and logistics—all driven by our proprietary technology.We empower brands with complete visibility across all performance metrics, including traffic, conversion rates, revenue, influencer ROI, content management, and inventory levels. For the first time, brands can monitor and manage their business operations in China in real time, utilizing data that is transparent, measurable, and actionable.By transforming outdated legacy systems into a cohesive, data-driven infrastructure, YASO enables international brands to reclaim control over their growth trajectory in China.In light of our recent Series A funding round, we are excited to expand our global team across London, Shanghai, and beyond, as we redefine the future of cross-border retail.The RoleJoin our dynamic team to collaborate with our Product Manager and engineering professionals to develop customer-facing platform features and internal tools that facilitate a self-service experience for our enterprise customers. You will be responsible for deploying data integrations, operational tools, and independent product capabilities that are essential to scaling our customer base tenfold.Reporting directly to our Founder (James, located in London), you will engage daily with your team members, the Product Manager, and YASO's operations team in Shanghai. You will also have regular opportunities for in-person collaboration with our international teams across Europe and Shanghai.Within your first 60 days, you will have successfully deployed at least one feature that our operations team or customers utilize weekly, taking ownership of the entire process from inception to delivery.You WillDevelop end-to-end features from database schema to user interface that address genuine operational challenges and yield significant impact for our team and customers.Design and implement APIs that support both internal tools and customer-facing platform functionalities, ensuring security, scalability, and maintainability.Translate product requirements into technical solutions. Collaborate with our Product Manager to refine specifications, evaluate feasibility, and identify architectural concerns before they escalate.Take ownership of your code in production. Manage deployment, monitoring, troubleshooting performance issues, and maintaining the systems you create.Work asynchronously across time zones. Engage daily with our engineering team in Shanghai, contributing to a shared data infrastructure and our unified codebase.Participate in the EU-based on-call rotation to uphold system reliability.Influence our engineering culture through comprehensive code reviews, documentation, and sharing best practices with the team.Shape our roadmap by providing valuable technical insights on our strategic direction.