Full Stack Engineer (Kotlin/React) at hyperexponential | London

We are seeking a talented Full Stack Developer to join our dynamic team at Vitol, where you will collaborate closely with various business lines. This role presents a unique opportunity to engage with both technical and non-technical experts to create innovative solutions and full-stack applications that are utilized globally across numerous commercial and operational desks. Your contributions will significantly influence decision-making through the development of cutting-edge solutions.In this role, you will play an integral part in transforming our existing application landscape. Your ability to swiftly comprehend business needs, communicate effectively, work autonomously, and rapidly prototype and iterate on new and existing requirements will be essential in delivering state-of-the-art solutions that empower our commercial teams.As a Full Stack Developer at Vitol, you will exemplify:Rapid Prototyping: Collaborate closely with operations and commercial teams to construct and support market-driven business development applications and enhance existing tools by swiftly iterating based on user feedback to create actionable, value-adding solutions.Project Management: Analyze ongoing business and user requirements while independently managing project lifecycles from start to finish within the team.Innovation: Propose innovative and reliable technical solutions that enhance existing processes or uncover new opportunities for the business.Platform Expertise and Integration: Develop a comprehensive understanding of Vitol's Management Information Systems (MIS) platforms and tools, including their functionalities and capabilities, to ensure their success.

Skin + Me is a pioneering technology start-up dedicated to transforming personalized skincare solutions. We have successfully delivered millions of treatments through our diverse multi-brand ecosystem, which includes Skin + Me, Hair + Me, and Renew + Me. Our proprietary technology stack supports everything from our e-commerce platform to in-house manufacturing processes.As we enter an exciting new growth phase, we are seeking a Senior Full Stack Software Engineer to join our dynamic and high-impact team. We leverage cutting-edge tools like Claude Code and Cursor to enhance our modern, fast-paced workflows.Our MissionAt Skin + Me, we prioritize tangible results over mere hours logged. Your objective will be to utilize advanced tools to streamline mundane tasks, allowing you to focus on tackling complex challenges related to scalability, experimentation, and architecture.Your ResponsibilitiesAgentic Workflows: Employ agentic tools to plan, refactor, and deploy features throughout our Python/React stack, significantly enhancing your technical capabilities.Full-Stack Ownership: Architect and implement comprehensive features, managing everything from backend logic and database designs to contemporary frontend user experiences.Drive Engineering Advancement: Contribute to shaping our AI-native development standards and guide the team towards high-velocity delivery practices.Who You AreAI Proficiency: You are adept in utilizing agentic AI, capable of managing edits across multiple files and discerning any inaccuracies from language model outputs.Pragmatic Architect: With your senior experience, you know when to rely on automated tools and when to intervene personally. You appreciate clean code, robust type systems, and comprehensive testing.High Agency: You are a proactive problem-solver who flourishes in a fast-paced, self-directed environment.Technical Skills RequiredExpertise in Python and associated web development frameworks, such as Flask and Django.Experience with relational databases (MySQL preferred) and ORM frameworks (e.g., SQLAlchemy, Alembic).Proficient in TypeScript and React.Experience in building and maintaining frontend design systems.Familiarity with containerization (Docker) and cloud platforms (preferably AWS).Understanding of modern web architecture and performance optimization techniques.Why Join Skin + Me?High Leverage: We equip you with the best tools and the freedom to utilize them effectively.Make a Difference: Be part of a revolutionary company dedicated to enhancing millions of lives.Equity: Every team member has a stake in our success.Perks: Enjoy free breakfast and lunch on office days, a dog-friendly workplace, 25 days of holiday, and an annual £500 development budget.

Join Our Team as a Full Stack Java/Python Engineer!We are seeking a talented Full Stack Java/Python Engineer for an exciting 6-month contract starting as soon as possible.Work Schedule: 2 days a week in our London office.Key Responsibilities:Leverage your extensive commercial software development experience, demonstrating a strong command of Java and Spring Boot, while crafting robust end-to-end full stack applications encompassing frontend, backend, and APIs.Utilize your proficiency in Python for agent services, orchestration, and LLM integrations.Implement modern frontend frameworks, such as React or Typescript, to deliver high-quality user experiences.Engage with cloud technologies and containerization (AWS/GCP/Azure, Docker), with a preference for candidates with Kubernetes experience.Handle data and retrieval mechanisms, including Postgres/NoSQL, vector databases, embeddings, and semantic search.Collaborate effectively in an agile development environment.Communicate technical challenges and influence decisions within the team, ensuring stakeholder satisfaction.Exhibit a strong understanding of engineering best practices, such as TDD, SOLID principles, and XP methodologies.Our Commitment to Diversity:We are proud to be an equal opportunity employer and encourage applications from all qualified candidates. We actively promote inclusivity and welcome applications from women, ethnic minorities, and individuals with disabilities. We consider all flexible working arrangements, tailored to the needs of the role, and strive to accommodate reasonable adjustments.

Join our dynamic team at Ratio Recruitment Ltd. as a Full Stack Developer, where you will have the opportunity to work on innovative projects that make a real impact. We are looking for a skilled developer who is proficient in both front-end and back-end technologies, and who is passionate about creating high-quality software solutions. You will collaborate closely with cross-functional teams to design, develop, and implement web applications that enhance user experience.

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

Role overview Legal & General seeks a Full-Stack Engineer to build and maintain scalable web applications. This position centers on Python and TypeScript, with a strong emphasis on teamwork and collaboration. Engineers in this group play a key part in projects that drive the company's digital growth. What you will do Develop and maintain web applications using Python and TypeScript Work alongside cross-functional teams to deliver software solutions Support active projects and contribute ideas for new initiatives Location This position is based in London.

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 other talented product engineers and the Evals team to craft tools that enhance AI agent safety at scale for our users. Your contributions will help develop innovative products that monitor AI coding agents for safety and security risks. Joining our small, dynamic team means you'll have substantial influence over both team dynamics and technological direction, with opportunities to quickly take on greater responsibilities.This position is perfect for you if you are passionate about creating products that genuinely enhance AI safety, thrive in fast-paced environments, and enjoy collaborative work with researchers.PRIMARY RESPONSIBILITIESProduct Development- Work alongside the team lead to clarify tool specifications, translating them into robust technical architectures.- Engineer and sustain features across the entire stack, from responsive front-end interfaces (using React) to scalable backend services in Python.- Produce clean, well-documented, and maintainable code that adheres to our rigorous standards for security and performance, while engaging with users to capture their use cases and requirements.Back-End Development- Design and build scalable backend services capable of processing and analyzing extensive AI agent logs.- Develop RESTful APIs and data processing pipelines for AI agent logs.- Create secure API endpoints to facilitate the integration of our tools into customer workflows.- Establish monitoring and logging systems to ensure optimal reliability and performance.Front-End Development- Construct intuitive user interfaces that empower customers to comprehend and act on AI agent safety and security evaluations.- Create interactive data visualizations that effectively convey complex AI behaviors.

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.

About UsAt Perlego, we are a dedicated team of nearly 100 professionals striving to democratize education. We believe that access to high-quality, affordable learning materials is essential for unlocking potential. Knowledge should be readily available, free from exorbitant costs.Over the last seven years, we have focused on empowering students across the UK and Europe to enjoy access to quality books. Following our recent $20 million funding round, we are excited to expand our reach to students globally, particularly in the US, while developing a platform that transcends traditional books, enabling students to study more effectively.Position OverviewWe are seeking a talented Software Engineer with proficiency in JavaScript, React, NextJS, Node.js, TypeScript, AWS, and Test-Driven Development (TDD). You will become a key member of our learner Tribe, collaborating within a squad dedicated to leveraging data-driven insights to enhance our technical SEO initiatives, improving the experience for logged-out users and optimizing payment subscription processes for our direct-to-consumer customers.Working EnvironmentOur teams operate in cross-functional squads, all focused on achieving common data-driven objectives. This role will join a squad made up of 4 Engineers, an Engineering Manager, a Data Engineer, a QA Engineer, a Designer, and a Product Manager.Technology Stack:NextJSReactTypeScriptNode.jsAWSPreferred Qualifications:Experience with Stripe payment systemsFamiliarity with Optimizely A/B testing toolsKey QualificationsYou are a great fit if you possess:A solid background in developing high-performance web applications using JavaScript, React/NextJS, Node.js, and TypeScript.A deep understanding of architectural principles such as Microservices, REST, object-oriented, and functional programming, as well as relational and NoSQL database design.Extensive experience with AWS and other cloud computing platforms.Expertise in modern JavaScript development techniques and tools.Experience in ideation and executing A/B tests to assess the impact of various features and monetization strategies.Experience working in an Agile environment emphasizing Test-Driven Development and CI/CD practices.Commercial experience as a software engineer.The ability to communicate complex technical issues in a simplified manner to non-technical stakeholders.⭐ Bonus Points If You Have:A degree in a computing-related field.Experience in technical SEO or payment-related projects.Experience in a startup setting.

Role overview g-mass is looking for a Full Stack Developer to contribute to building and supporting applications tailored to London Market Insurance. The role centers on developing tools that enhance the client experience and make insurance processes more efficient. What you will do Develop and maintain web applications that support insurance workflows Ensure application reliability to support daily business operations Use modern technologies to deliver solutions for insurance clients Location This position is based in London, England, United Kingdom.

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.

Full Stack Developer with PHP Symfony Expertise - LondonWe are seeking a talented Full Stack Developer with experience in PHP Symfony to join our client, a prominent provider in the arts sector located in central London. This is an exciting opportunity to contribute to projects that are both technically robust and visually captivating.As a Full Stack Developer, you will engage in the entire project lifecycle, bringing innovative ideas to fruition. You will thrive in dynamic digital environments, addressing complex challenges with creative solutions.

Corgi builds insurance products for tech startups, using AI to streamline underwriting and improve the customer experience. With $108 million in funding and a carrier license, the company is growing rapidly and expanding into the UK and EU. The core platform is built with Django, integrates Stripe for payments, and relies on AI-driven processes. Role overview This Full-Stack Developer position is based in London. The role is designed for people who enjoy taking ownership of projects from concept to launch, often working independently or in small teams. Corgi values developers who have shipped real products, whether as side projects, weekend builds, or tools with active users. What you will do Own projects from idea through live deployment, frequently working solo or in small groups Work across the stack, adapting quickly to new technical challenges Contribute to a workflow focused on frequent shipping and iteration Participate in open, transparent decision-making Maintain steady progress during both launch sprints and quieter periods What Corgi looks for Proven experience delivering shipped projects independently Comfort with the pace and ambiguity typical of startups A bias toward action and results Strong technical opinions, balanced with openness to better ideas Low-ego, outcome-focused approach How the team works Quick decisions are valued over waiting for perfect answers Products and processes are updated frequently, not just on a set schedule Short review cycles and a focus on shipping improvements High intensity during launches, steady progress at other times Transparent, public-first communication style Internal competition motivates high performers This is a build-focused role where sustained contribution and ownership are important. Behaviors that will lead to quick removal Office politics, blame-shifting, or gossip Taking feedback personally rather than constructively Adding unnecessary overhead or slowing down processes Missing deadlines after making commitments How to apply Send links to your GitHub, personal website, or live projects you have shipped Do not send a CV Email applications to: sergio@corgi.com If you cannot provide evidence of shipped work, this role is unlikely to be a fit Location and compensation Based in London, with on-site and hybrid options Base salary: £75,000 to £140,000, plus equity The salary range reflects Corgi’s focus on proven ability to ship, not job titles

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

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.

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.

Who We AreAt Intropic, we are revolutionizing financial intelligence by merging profound market expertise with cutting-edge AI technology. Established in the heart of London’s Canary Wharf, our mission is to simplify complex data into actionable insights. Our workplace culture thrives on values such as truth-seeking, speed, and accountability, shaping our collaborative and innovative environment. We prioritize integrity and impact, encouraging curiosity and independent thinking. If you are passionate about tackling challenges, driven by innovation, and eager to enhance your intelligence alongside a team of brilliant minds, Intropic is the perfect place for you to bring your ideas to life.Who We Look ForAs a dynamic fintech start-up with a successful product lineup, we are on the brink of launching our next groundbreaking initiative. We seek individuals who excel at solving complex, open-ended problems across various domains; our engineers are expected to engage in more than just routine tasks. A typical week might involve debugging Python code, implementing infrastructure changes, engaging with early adopters, and collaborating on strategic planning with team leads. We value talent over traditional resumes; if you are interested, we would be thrilled to hear from you!

Pharmacy2U, the UK's largest online pharmacy, serves over 1.8 million NHS patients and has been a trusted name in digital healthcare for 25 years. As a certified B Corp and Great Place to Work, the company is committed to high social and environmental standards, transparency, and a supportive workplace. Role overview This Full Stack Engineer position is based in London with a hybrid work model. Expect to work from the central London office twice each month. The role is permanent and full-time. Core hours are 09:30 to 16:00, with flexibility to adjust your schedule around these times. What you will do Share technical responsibility for both current and new services. Collaborate with engineers, clinicians, algorithm developers, and Quality Analysts to deliver solutions that are reliable and well-tested. Take part in an out-of-hours on-call rota when required. On-call duties are scheduled fairly and include additional compensation. Who we’re looking for The team is seeking a skilled, detail-oriented Full Stack Engineer who values collaboration and problem-solving. A strong commitment to quality and a desire to improve healthcare for millions are important in this role. Why join Pharmacy2U? Work alongside a team focused on enhancing patient care through technology. Join an organization recognized for its positive culture and social responsibility. Receive a comprehensive benefits package and a competitive salary based on experience. Benefit from supportive and flexible working arrangements.

Join our dynamic team as a Full Stack Developer, where you'll leverage your exceptional coding abilities in C#, ASP.NET, MVC, Entity Framework, SQL Server, JavaScript, and Angular. Our expanding software company, headquartered in Surrey, is on the lookout for a passionate developer to help elevate our suite of innovative business portals, including a highly anticipated redesign of our globally recognized platform.As a key member of our close-knit development team, you will actively engage in adopting Agile methodologies, contributing across all phases of the product development life cycle. This is a remarkable opportunity to be part of a versatile team that prioritizes high-quality software craftsmanship, collaborative teamwork, and individual growth.