Frontend Engineer - Java & Open Source at version1 | London

Join our dynamic team at version1 as a Frontend Engineer, where your expertise in Java and open-source technologies will help shape the future of our digital solutions. You will collaborate with cross-functional teams to design and implement innovative front-end solutions that enhance user experience and drive engagement.

Role overview airapps seeks a React Native Engineer based in the London Metropolitan Area. The main focus is building mobile apps that offer reliable and smooth user experiences. Collaboration is central to this role, working closely with designers and backend developers to ensure each application meets client expectations and quality standards. What you will do Develop mobile applications using React Native Translate UI and UX designs from designers into working products Work with backend developers to connect APIs and services Contribute to delivering applications that match client needs and requirements

Join CoreWeave as a Principal Engineer!At CoreWeave, we are redefining the cloud landscape for AI innovation. Our platform is tailored for trailblazers, offering cutting-edge technology and a collaborative environment designed to empower innovators to construct and expand AI solutions with assuredness. Serving leading AI labs, startups, and global corporations, we blend exceptional infrastructure performance with extensive technical know-how to expedite breakthroughs and transform compute power into actionable capabilities. Since our founding in 2017, we have proudly transitioned to a publicly traded entity (Nasdaq: CRWV) as of March 2025. Discover more at www.coreweave.com.As a Living Wage accredited Employer, we prioritize fair compensation for all our employees.

Anduril Industries is a pioneering defense technology firm dedicated to enhancing U.S. and allied military capabilities through innovative technology. By integrating the expertise, cutting-edge technology, and business models of the most forward-thinking companies of the 21st century into the defense sector, Anduril is revolutionizing the design, development, and deployment of military systems. Our family of systems operates on Lattice OS, an AI-driven platform that transforms vast data streams into a real-time, 3D command and control center. As we navigate an era of strategic competition, Anduril is resolutely focused on delivering advanced autonomy, AI technologies, computer vision, sensor fusion, and networking solutions to the military in a fraction of the time traditionally expected.ABOUT THE JOBThe Maneuver Dominance team at Anduril is at the forefront of developing operationally relevant, multi-asset autonomy. We are committed to building the next generation of autonomous capabilities by leveraging existing Anduril platforms such as Ghost and Altius, integrating third-party platforms into our Lattice ecosystem, and innovating groundbreaking systems that will redefine the battlefield. Our team creates software services and autonomy algorithms that address some of the most challenging problems faced by our clients.As a Frontend Engineer on the Maneuver Dominance team, you will take charge of several web applications that empower operators to design, plan, execute, and review missions for diverse fleets of autonomous systems. You will craft immersive, high-performance interfaces that convert complex operational data into clear, actionable workflows, facilitating the entire mission lifecycle. Above all, our engineers embody a “Whatever It Takes” ethos—executing tasks efficiently and pragmatically while maintaining a sharp focus on mission objectives and sound engineering principles to achieve successful outcomes with precision, punctuality, and quality.

Ebury empowers ambitious businesses to unlock global growth, and we adopt the same ethos for our team members. We promote innovation, collaboration, and problem-solving, creating an environment where everyone feels valued, supported, and empowered to thrive.If you are a collaborative individual eager to revolutionize how businesses operate on a global scale, we invite you to connect with us. Join Ebury and accelerate your career while helping to shape the future of financial services.Position: Senior React Native EngineerLocation: London Office - Hybrid (4 days in-office, 1 day remote)Ebury is looking for a talented Senior React Native Engineer to join our Mobile Platform team. Your primary focus will be on enhancing our mobile application by developing innovative features, services, and frameworks that empower Ebury's product teams to deliver outstanding functionalities efficiently and independently, while ensuring a cohesive and user-friendly experience for our customers.We value a proactive attitude, a strong work ethic, and the entrepreneurial spirit to tackle challenging questions. You should be data-informed and driven by the desire to solve our customers' challenges. A natural curiosity and commitment to continuous learning are essential.

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.

Corgi builds insurance products for tech startups using AI and a modern stack. The company operates as a licensed carrier, has raised $108 million, and recently expanded into the UK and EU. The platform uses Django, integrates Stripe for payments, and features AI-powered underwriting. Corgi is growing its engineering team in London. Role overview This Frontend Software Engineer role in London focuses on building and shipping products with autonomy. The team values engineers who can take an idea from concept to live deployment without waiting for detailed roadmaps. Experience launching side projects, weekend builds, or products used by real customers is highly regarded. What makes a strong fit Motivation to work in a startup environment Proven ability to independently build and launch projects Delivers results quickly, sometimes within hours or days Comfort working across the stack and adapting to new challenges Shares clear opinions but remains open to better ideas Prioritizes outcomes and team goals over titles How the team works Decisions happen quickly; perfection is not required Products and improvements launch regularly, not just quarterly Emphasis on shipping and iterating instead of long review cycles High intensity is standard, both during launches and quieter times Decisions are made openly and transparently Internal competition encourages everyone to improve This position is for builders who want to create and deliver real products. Behaviors that will end the role quickly Engaging in office politics or gossip Taking direct feedback as personal criticism Adding unnecessary process or overhead Missing deadlines after committing to them How to apply Send links to GitHub, personal websites, live projects, or shipped products CVs are not required Email applications to: sergio@corgi.com Proof of shipped work is required Location and compensation Based in London, with on-site or hybrid options Base salary ranges from £75,000 to £140,000, plus equity options Salary depends on ability to ship, not seniority or job titles

Your Impact The Principal Software Engineer plays a pivotal role in shaping and advancing our architectural framework by employing Distributed Domain Driven Design methodologies. This position is crucial for ensuring the resilience and scalability of our systems. You will influence architectural strategies and provide embedded consultation within projects, guiding teams to adopt best practices and effective design patterns. What You'll Do ● Architecture Leadership: Spearhead the definition and evolution of our architecture through Distributed Domain Driven Design principles. Serve as the strategic leader for core Architecture Quality Attributes (e.g., Availability, Performance, Scalability, Security) to guide architectural evaluations. Provide project-specific architectural consultation to advocate best practices, design patterns, and informed buy vs. build decisions.● Platform Capability Enhancement: Aid in prioritizing improvements across feature and data platforms. Enhance the documentation and communication of architectural descriptions through automation and innovative tools. Oversee platform-wide strategies, including naming conventions, protocol standards, and design patterns to ensure continuous value creation.● Effective Communication: Clearly articulate complex technical concepts in both written and verbal formats, tailored to both technical and non-technical stakeholders. Collaborate with various stakeholders to foster consensus when needed, ensuring alignment on architectural choices.

Join Superis Labs, a pioneering force in the crypto space, as we craft a state-of-the-art perpetual futures decentralized exchange (DEX) on the Solana blockchain. With our first production MVP in progress, your contributions will shape the architecture and protocol design at the core of our platform.Backed by Ergonia, a leading crypto-native market-making firm, we leverage extensive experience in trading and development on Solana to ensure our success.As a key member of our team, you will start with a minimal core and rapidly iterate towards a fully-featured mainnet exchange. This role offers significant ownership as you build production systems with tight deadlines.Your ResponsibilitiesDevelop the primary web trading interface, including markets, order entry, positions, balances, and charts.Seamlessly integrate Solana wallet functionalities and backend services into real-time user interface systems.Implement low-latency data streaming and effective state management.Enhance frontend performance for high-frequency user interactions.Work collaboratively with designers, backend engineers, and protocol engineers on system architecture.Create tests and maintain comprehensive documentation.Take complete ownership of features from design through to production.

About Checkout.com Checkout.com builds digital payment solutions for businesses worldwide. From our London headquarters, we support clients such as eBay, ASOS, Klarna, Uber Eats, and Sony, helping them process billions of transactions each year. Our platform aims to remove friction from payments and help partners grow. With 19 offices across six continents, our team brings together a wide range of perspectives and expertise. We focus on driving change in fintech and shaping the future of payments. Lead Mobile Developer Role The Lead Mobile Developer will guide the development of Checkout.com's flagship mobile app. This role covers hands-on coding, setting technical direction, and shaping the app’s architecture. The goal: deliver a high-performance, user-focused experience that scales. This position calls for a mobile specialist who can influence technology choices and component strategies. Strong experience building mobile-first consumer applications is essential. Key Responsibilities Design and implement the first version of our mobile app using React Native, with room to adapt the tech stack as needed. Make key architectural decisions on navigation, state management, animations, and performance to support scalability and maintainability. Champion mobile user experience and performance, deciding when to use React Native or native development approaches. Work closely with backend and product teams to deliver seamless, end-to-end experiences. Define core engineering practices for mobile, covering coding standards, CI/CD, testing, and monitoring. Learn more about us at Checkout.com.

About Airwallex Airwallex builds payments and financial platforms for global businesses. Over 200,000 companies, including Brex, Rippling, Navan, Qantas, and SHEIN, use Airwallex to manage business accounts and treasury operations worldwide. Founded in Melbourne, Airwallex has grown to a team of more than 2,000 tech professionals across 26 offices. The company is valued at US$8 billion and backed by investors such as T. Rowe Price, Visa, and Mastercard. Role Overview: Frontend Engineer for Scalable Solutions (London, UK) This role focuses on building and refining frontend systems that support Airwallex’s large-scale financial products. Work from the London office as part of a diverse, global team shaping how businesses move and manage money across borders.

Quantum Systems GmbH is seeking an experienced Frontend Engineer to join the UK team in London. This position focuses on building responsive, user-centered web interfaces for real-time control and monitoring of robotic swarms and sensor platforms. The role offers the chance to shape how users interact with advanced robotics technology. What You Will Do Design, develop, and refine frontend applications for controlling and visualizing robotic swarms and sensor data. Work with backend engineers to integrate APIs and ensure smooth data exchange between systems. Build intuitive, high-performance user interfaces using modern frameworks such as React or similar tools. Translate UX/UI designs into functional, production-ready applications in close partnership with designers. Uphold code quality, scalability, and maintainability through clean coding standards and code reviews. Diagnose and improve frontend performance, especially for real-time use cases. Who We're Looking For At least 5 years of professional experience in frontend engineering. Strong background in building user interfaces for complex, data-driven applications. Proficiency with modern frontend frameworks (React or similar). Comfort working closely with backend engineers and UX/UI designers. This role is based in London, Greater London, United Kingdom.

We are seeking a Principal Software Engineer specialized in engineering applications to join our dynamic team at physicsx. In this role, you will lead the design and development of innovative software solutions that empower our engineering teams to achieve exceptional results. Your expertise will drive the implementation of cutting-edge technologies and methodologies, ensuring the highest standards of performance and reliability.As a Principal Software Engineer, you will collaborate closely with cross-functional teams, mentor junior engineers, and contribute to the overall technical strategy of our organization. You will have the opportunity to work on challenging projects that have a significant impact on our business and clients.

Join Version 1 as a Lead Frontend Engineer, where you will drive innovation and lead a team of talented engineers in developing cutting-edge applications. Collaborate with cross-functional teams to enhance user experiences and improve application performance using Java and Open Source technologies.

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.

We encourage you to apply for the position that aligns most closely with your skills and experience. If our team identifies a better fit for you in another role, we will reach out with that opportunity.Position Overview:As a Front-end Developer at Squarepoint, you will play a pivotal role in enhancing the user experience on our advanced research and trading platforms. Utilizing React and TypeScript, you will create fully-functional applications that enable real-time data access and facilitate the exploration of extensive data sets crucial to our trading workflows and operations.Your efforts will significantly contribute to swift decision-making and help maintain our competitive edge in a fast-paced trading landscape.

Corgi develops insurance products for tech startups, using AI to enhance underwriting and simplify coverage. With $108M in funding and a full carrier license, the company is expanding into the UK and EU. The tech stack centers on Django and Stripe, supporting frequent product releases and rapid iteration. Role overview This Frontend Engineer role is based in London. The position suits someone who prefers autonomy, moves quickly from concept to launch, and enjoys working in a startup environment. Corgi values engineers who have shipped real products, whether weekend projects, side builds, or anything with live users or measurable traffic. The company operates without a detailed roadmap, so initiative and independent execution matter most. What we look for Drive and energy to match a startup’s pace Evidence of building and shipping projects independently Ability to deliver results in hours or days, not weeks Comfort working across different tech stacks and tackling new challenges Strong opinions, paired with openness to better ideas Low ego and motivation focused on results, not titles How we work Decisions happen quickly; waiting for perfect answers is rare New products and process changes launch often, not just quarterly Shipping and iterating take priority over lengthy review cycles High intensity during launches, steady focus in between Transparency is the norm, and decisions are made openly Internal competition helps keep standards high This is a build seat, not a coast seat. Behaviors that don’t fit Office politics, avoiding responsibility, or gossip Taking direct feedback personally instead of constructively Adding unnecessary overhead instead of simplifying Missing deadlines after making commitments How to apply Share links to your GitHub, personal website, or live projects you’ve built and launched Do not send a CV Email applications to: sergio@corgi.com If you cannot show shipped work, this role is unlikely to be a match Location and compensation London-based, with on-site or hybrid options Base salary: £75,000 to £140,000 Equity included

Senior Full-Stack/AI Engineer (Frontend-Focused)About Us:At AND Digital, we are a forward-thinking technology company committed to enhancing digital delivery and bridging the digital skills gap. Since our inception in 2014, we have empowered organizations to create exceptional digital products and cultivate robust digital teams.Our philosophy centers around creating lasting legacies for our clients. By fostering close partnerships with our regional Clubs, we ensure that our clients receive prioritized support from teams located nearby.This innovative model has fueled our success, reflected in our remarkable organic growth since 2014. Today, we boast a talented workforce of over 1,300 professionals across Clubs in the UK and Europe, with ambitious plans for global expansion in the coming years.Join us in our mission to close the global digital skills gap.Your ContributionsEssential Technical SkillsExtensive hands-on experience in delivering comprehensive JavaScript/TypeScript solutions, showcasing strong expertise in React, Next.js, Node.js, and the wider JavaScript ecosystem.Proficient in developing high-quality, production-ready systems with a solid understanding of performance, accessibility, security, and maintainability.Exhibits technical leadership within teams by influencing implementation strategies, guiding architectural decisions, and exemplifying engineering excellence through active contributions.Strong grasp of cloud infrastructure (preferably AWS) and CI/CD pipelines, including knowledge of application lifecycle management in production environments.Adopts a DevOps mindset to ensure efficient delivery workflows, enhanced observability, and operational readiness.Capable of taking ownership of intricate technical challenges, making pragmatic compromises, and effectively communicating decisions to both technical and non-technical stakeholders.Comfortable operating across the technology stack, with the ability to contribute meaningfully to backend services when necessary, despite a frontend inclination.AI & Emerging TechnologiesHands-on experience implementing AI in practical settings, such as integrating AI APIs/services, crafting AI-enhanced user experiences, or utilizing AI-assisted development tools responsibly.Adept at discerning where AI can add genuine value in comparison to traditional engineering methodologies.Skilled in assessing risk, cost, maintainability, and user impact when proposing AI-driven solutions.Curious about emerging AI trends, frameworks, and tools, with the ability to apply them in practical contexts rather than purely experimental settings.Capable of advising clients on realistic AI possibilities, helping them differentiate between hype and practical benefits.Consulting & Client EngagementExperience in consulting or client-facing roles, demonstrating confidence in navigating ambiguity and fostering client relationships.

Join Our MissionAt Omnea, we’re transforming enterprise operations by focusing on the often cumbersome procurement process. Imagine a world where a single purchase no longer takes months, requiring 50+ emails and approvals from Finance, Legal, Security, and IT. We aim to change that.Backed by $75M from Khosla Ventures, Insight Partners, and Accel, our AI-driven platform seamlessly connects every stakeholder, step, and system to facilitate quick, safe, and efficient purchasing. Experience automated approvals, real-time supplier risk assessments, and complete visibility into spending—all from one centralized location.With a $7B+ untapped market, our growth trajectory speaks volumes. We have achieved a tenfold increase in Annual Recurring Revenue (ARR), reaching double-digit millions in just 18 months, and have earned the trust of global enterprises like Spotify, MongoDB, Monzo, and Albertsons. We are proud to be recognized as the 4th fastest growing startup in Europe.Our experienced team includes former members of Tessian, the cybersecurity tech firm backed by Sequoia, Balderton, and Accel, who have successfully scaled unicorns and launched world-class products. You will collaborate with industry leaders including Ben, Abs, Sabrina, and Rebe.Your RoleWe are on the lookout for an outstanding, product-focused full-stack software engineer to join our engineering team. As we aim to scale from our current double-digit customers to over 200 enterprise clients and significantly increase our revenue over the next 2–3 years, your contributions will be vital in driving our product, team, and company growth as we transition from a 'start-up' to a 'scale-up'.You will be joining us at a crucial moment. We recently secured $50M in Series B funding from Khosla Ventures, Insight Partners, and Accel.

At MOO, we embarked on a mission to revolutionize the print industry in 2006, and our journey has been remarkable. Today, our diverse team of over 400 talented individuals crafts innovative print and digital solutions for businesses of all scales—from global giants like Google and Airbnb to local artisans showcasing their work at craft fairs. With our global headquarters situated in London, UK, we also have locations in Dagenham, Boston, MA, East Providence, RI, and Denver, CO in the United States.We are continuously pushing the boundaries of creativity, and we are looking for a Principal Architect to join our journey.This pivotal role spans across Technology and Product, extending beyond eCommerce. You will collaborate closely with Heads of Engineering, Staff Engineers, Product, and Platform teams to define and drive the comprehensive system architecture that encompasses eCommerce, post-purchase processes, manufacturing, and data management. You will be responsible for architectural outcomes, migration strategies, and empowering product engineering to deliver high-quality results swiftly.