Senior Frontend Software Engineer

About Firstup Firstup builds a communication platform used by over 17 million employees worldwide, including teams at 40 Fortune 100 companies. The company focuses on improving the employee experience at every stage, from onboarding through retirement. The team brings together expertise in workforce communications, employee experience, and technology to help…

Role overview Deliveroo is looking for a Senior Frontend Software Engineer to help shape the future of its platform. This role focuses on building high-quality user experiences and working closely with teams across the company. What you will do Develop and maintain frontend features for Deliveroo’s applications Collaborate with engineers, designers, and product managers to deliver seamless user experiences Apply expertise in modern web technologies to create engaging, reliable interfaces Location This position is based at Deliveroo’s London headquarters in The River Building.

TransPerfect is seeking a Senior Frontend Engineer to join its London-based team. This position plays a key role in developing and maintaining software products that support global operations. The focus is on delivering high-quality, reliable solutions that drive the company’s technology forward. Role overview The Senior Frontend Engineer will work on the design, development, and execution of software products. This includes taking responsibility for the quality of the user interface and ensuring that products meet both technical and user needs. The role involves collaborating with other teams to deliver solutions that support TransPerfect’s worldwide business. About the TechOps team TechOps has supported TransPerfect’s growth for more than ten years. The team builds and maintains technology that streamlines processes for both clients and internal teams. Projects range from workflow improvements to developing scalable interfaces for the GlobalLink platform, all aimed at making complex systems easier to use. What you will do Lead frontend development for software products used across global operations Ensure the quality and reliability of user interfaces Work closely with cross-functional teams to deliver scalable solutions

About UsPhysicsX is an innovative deep-tech company at the forefront of numerical physics and Formula One, dedicated to revolutionizing hardware innovation through software acceleration.We are crafting a cutting-edge AI-driven simulation software stack tailored for engineering and manufacturing in advanced industries. Our platform enables high-fidelity, multi-physics simulations via AI inference throughout the entire engineering lifecycle, unlocking unparalleled levels of optimization and automation in design, manufacturing, and operations. We empower engineers to push the boundaries of possibility, serving leading innovators in Aerospace & Defense, Materials, Energy, Semiconductors, and Automotive sectors.The RoleAs part of our product team, PhysicsX is creating a platform utilized by Data Scientists and Simulation Engineers to construct, train, and deploy Deep Physics Models. The backbone of this platform is the management of vast volumes of intricate simulation data, facilitating high-fidelity multi-physics simulations through AI inference.We are seeking a Senior Frontend Software Engineer to join our dedicated team of Frontend Engineers. You will work collaboratively in a cross-functional environment, where you will have the autonomy to influence implementation decisions. You will be responsible for developing and enhancing the frontend that animates our platform — from dynamic 3D visualizations of simulation data to seamless API integrations that enable complex machine learning workflows. You will architect composable frontend structures, optimize performance for data-intensive interfaces, and ensure intuitive interactions for our engineers and scientists handling large datasets and simulation outputs.In this senior role, you will significantly shape the technical direction — authoring Technical Decision Records, mentoring junior engineers, and establishing standards that ensure our platform remains reliable, secure, and efficient. This position is perfect for a creator passionate about delivering exceptional user experiences and building robust frontend architectures.What You Will DoDevelop and improve a frontend platform that supports intricate simulation and machine learning workflows — from 3D visualizations to seamless API integrations and data-heavy interfaces.Design and implement scalable frontend architectures and component systems, including micro-frontend patterns, to facilitate maintainable development.Enhance user experience through advanced caching strategies, performance monitoring, layout optimization, and accessibility best practices.Develop and implement sophisticated state management and data flow patterns to accommodate real-time simulation data and complex user interactions.Take ownership of your work from inception to completion, ensuring high-quality results.

Join our dynamic team as a Senior Frontend Engineer at AECOM, where you will be at the forefront of developing innovative web applications and user interfaces. We are looking for an enthusiastic engineer with a passion for crafting seamless and engaging digital experiences. You will collaborate with cross-functional teams to design and implement robust solutions that enhance user interaction and satisfaction.

About UsPerk, previously known as TravelPerk, is an innovative platform dedicated to transforming travel and expense management. Our solutions automate the tedious manual processes that hinder productivity, streamlining everything from travel arrangements to expense reporting and invoice management. By addressing this hidden workload that drains hours and stifles innovation, we are committed to enhancing real work with significant impact.With the trust of over 10,000 companies globally, including renowned names like Wise, On Running, Breitling, and Fabletics, we are tackling the staggering issue of 7 hours of lost productivity per employee each week, a challenge valued at $1.7 trillion.Established in 2015, Perk has rapidly expanded into a global enterprise with a team of more than 1,800 professionals across 12 locations, with our main offices situated in London and Boston. We blend innovation, control, and simplicity to revolutionize workplace dynamics and enhance employee satisfaction.Our culture is anchored in values such as ownership, delivering exceptional experiences, and teamwork. We cherish curiosity, purpose, and mindset, not merely knowledge, to unlock your full potential. Our talent pool consists of top experts from the travel and SaaS sectors, representing over 70 nations. If you are eager to make a tangible impact and help shape the work experiences of millions, we would be thrilled to welcome you to our team.Explore more at www.perk.com.

At Feeld, we envision a world where individuals are deeply connected to themselves and to one another. Our mission is to create an inclusive, human-centered platform that enhances the human experience of sexuality and relationships. We are currently seeking a Senior Frontend Engineer specializing in monetization to join our fully remote team and contribute to this transformative vision.As a key member of our team, you will take charge of developing, refining, and optimizing Feeld's monetization experiences across mobile platforms. Your efforts will ensure that users navigate clear, efficient, and trustworthy purchase flows that facilitate sustainable revenue growth.Your Responsibilities:Develop high-converting monetization features such as subscriptions, in-app purchases, paywalls, and promotions with minimal post-release bugs.Implement robust state management and data-fetching strategies to enable real-time pricing, entitlements, experiments, and user segmentation.Enhance the stability and performance of monetization-critical processes, reducing crashes and friction during purchases, restorations, and upgrades.Integrate seamlessly with backend monetization services, analytics platforms, A/B testing frameworks, and third-party SDKs (e.g., App Store/Play billing).Ensure that monetization-related frontend SDKs are updated in accordance with changes in mobile platforms, particularly those affecting payments and store compliance.Your Professional Growth:Expand your expertise in mobile payment systems and best practices within the subscription economy for both iOS and Android platforms.Gain practical experience with experimentation frameworks and data-driven product development, learning to design, instrument, and analyze tests that drive revenue growth.Enhance your ability to collaborate with non-technical partners by translating complex technical concepts into actionable business insights.Learn how to scale monetization systems across international markets, navigating complexities around multiple currencies, regional pricing strategies, and feature flag architectures.Strengthen your skills in constructing resilient, high-performance systems by optimizing critical paths, mitigating technical debt, and accelerating iterations on high-impact revenue features.

About NevisNevis is revolutionizing the financial sector with the launch of the world's pioneering AI wealth management platform. In just nine months, we have successfully amassed over $50 billion in assets under management and we project to surpass $100 billion by year-end.Supported by leading investors, we have raised a total of $40 million from prominent firms including Sequoia Capital, ICONIQ, and Ribbit. This positions Nevis as one of the most highly funded and rapidly growing Series A startups in Europe.The RoleWe are seeking a passionate Frontend Software Engineer who appreciates the artistry of interfaces and sees code as a craft. In this pivotal role, you will design and develop Nevis’ core product, an innovative AI-native wealth management platform, and bring intelligent workflows to life for financial advisors around the world.You will collaborate closely with designers and backend engineers to swiftly transform ideas into reality. If you are enthusiastic about modern web technologies, value design excellence, and are eager to deliver impactful products, you will excel in our dynamic environment.What You’ll DoWork together with designers to create visually stunning and intuitive features.Translate intricate AI and financial data into user-friendly interfaces.Write clean, well-tested, and reusable code while mentoring others in best practices.Contribute to the evolution of our design system and enhance frontend craftsmanship.Rapidly prototype, solicit feedback, and iterate on solutions.Partner with backend engineers to seamlessly integrate APIs and visualize data.Pay meticulous attention to performance, accessibility, and the finer details that users appreciate.Who You AreYou possess extensive experience with TypeScript and a deep understanding of JavaScript.You are well-versed in React and eager to leverage the latest features.You have a thoughtful approach to component design, focusing on composable APIs and clear abstractions.You have an understanding of modern web dynamics including browser performance and the elements that contribute to a responsive interface.You are adept with contemporary tooling such as Vite, SCSS, and component libraries.You are proficient in delivering features from inception to production.

Join us at elasticstage as a Senior Frontend Engineer and play a crucial role in revolutionizing the music industry. Our innovative technology enables the production of on-demand vinyl records, providing a platform for music creators to effortlessly create and sell their music worldwide at no cost. We collaborate with top record labels, streaming services, digital providers, distributors, and renowned global artists to deliver a comprehensive solution for physical media. Our mission is to empower small and emerging artists, offering them seamless access to market their vinyl and CDs to fans through our state-of-the-art production and fulfillment centers across Europe, the USA, and Asia.The vinyl market has experienced consistent growth of over 20% annually for the past 16 years, and CDs are witnessing a resurgence for the first time in two decades. By 2030, we anticipate nearly 200 million music creators globally, with AI further accelerating this growth. Many artists aspire to have their music available on vinyl or CD for their friends, family, and fans, and our scalable on-demand technology makes this accessible without the burden of high costs or minimum orders. At elasticstage, we provide easy and affordable access to this burgeoning market.As a Senior Frontend Engineer, you will take ownership of our front-end platform, engaging in hands-on development while providing technical leadership and direction. You will collaborate closely with product, design, and backend engineering teams to deliver exceptional user experiences across our e-commerce platform, creator tools, and operational systems.Join us and contribute to scaling a dynamic, high-profile disruptor in the music industry!

Role overview Paddle is looking for a Senior Frontend Engineer based in the UK. The position centers on improving user experiences and developing modern web applications that power our payment solutions. What you will do Enhance and maintain web applications used by Paddle’s customers Work closely with engineers and product teams to deliver new features and improvements Share ideas that shape both product direction and user experience Apply current frontend technologies to address product challenges Requirements Background in building and maintaining web applications Comfort working collaboratively within a team Interest in solving complex problems and developing technical skills Located in the UK

About UsPerk, formerly known as TravelPerk, is an innovative platform specializing in travel and spend management. Our mission is to eliminate the tedious manual tasks that hinder productivity, automating everything from travel bookings to expense management and invoice processing. By addressing the inefficiencies that cost organizations significant time and resources, we empower businesses to focus on what truly matters.Trusted by over 10,000 companies globally, including industry leaders like Wise, On Running, Breitling, and Fabletics, we tackle the staggering 7 hours of lost productivity each week per employee, a $1.7 trillion issue.Founded in 2015, Perk has rapidly expanded to a team of more than 1,800 talented individuals across 12 offices worldwide, with headquarters located in both London and Boston. Our blend of innovation, control, and simplicity is transforming workplace dynamics and enhancing employee satisfaction.At Perk, our culture is driven by core values such as ownership, delivering exceptional experiences, and fostering teamwork. We emphasize curiosity, purpose, and a growth mindset to unlock your full potential. Our diverse talent team hails from the travel and SaaS sectors, representing over 70 countries. If you’re passionate about making a meaningful impact and reshaping the work experience for millions, we invite you to join us.Discover more at www.perk.com.

Role Overview Utility Warehouse is looking for a Frontend Software Engineer to join the Lifecycle Customer team in London. This group focuses on building web applications that improve how customers interact with our services and help keep them engaged. What You Will Do Work with designers and backend developers to create clear, responsive user interfaces Build features that make our digital products easier and more enjoyable to use Contribute ideas and code that influence our web platforms and customer experience About the Team The Lifecycle Customer team supports Utility Warehouse’s goal of delivering strong value to customers. Collaboration and a focus on usability are central to how we work.

Join Version1 as a Senior Frontend Engineer and play a pivotal role in transforming digital solutions. We are seeking an innovative and skilled developer who is passionate about creating exceptional user experiences. You will work closely with cross-functional teams to design and implement high-quality, responsive web applications.

Location: London Start date: Immediate The Role: We are seeking exceptionally skilled and motivated software engineers who take pride in their craft to enhance our Engineering team based in London. As a successful candidate, you will collaborate within a cross-functional team that includes product managers and designers, working closely with the wider business to deliver effective code that addresses real-world challenges for both internal and external clients. You will take charge of the services overseen by your team, ensuring their development aligns with the overarching AlphaSights Engineering strategy, while also mentoring junior engineers. If you are passionate about problem-solving through coding and aspire to work alongside outstanding colleagues in a high-achievement environment, this position is ideal for you. What You’ll Do: Design Solutions: Define optimal technical solutions to business problems, contributing to a scalable architectural vision that aims to become the world's leading research platform. Ship Working Code: Our primary tech stack consists of React for the frontend and Kotlin microservices with Postgres for the backend, alongside some legacy services built in Ruby on Rails. We continually assess new technologies that could enhance our stack. Deploy and Iterate: We release updates frequently to our customers, utilizing CircleCI and Spinnaker for CI/CD, gathering feedback promptly to inform subsequent iterations. Build Your Competency: You will rapidly advance your skills by developing market-leading technology alongside experienced colleagues in a high-performance environment. Engineers can also utilize our L&D budget to accelerate their development of specific technical competencies. Maintenance and Troubleshooting: Diligently monitor our services to catch errors proactively, diagnose root causes, and deploy fixes before users are affected. Who You Are: You likely hold a degree in a STEM subject, but we are also open to candidates who have honed their skills through alternative pathways. Experience: Proven experience at a similar level within a mature Engineering team, with aspirations to elevate your career. We seek individuals with outstanding potential. Technical Expertise: Extensive knowledge in frontend engineering, including designing, building, and maintaining robust web applications.

Senior Frontend Engineer - Elevate User Experiences Are you a seasoned Frontend Engineer looking to make a significant impact? Join our dynamic and agile delivery team at ClearScore, where we are dedicated to crafting innovative experiences for our users through the latest technologies. If you thrive in a high-performance, entrepreneurial environment that celebrates the art of developing cutting-edge products and tackling complex challenges, we want to hear from you! As a valued member of our established cross-functional squad, you will focus on advancing our design system, enhancing our logged-out website, and exploring other groundbreaking technologies. We foster a culture of continuous improvement and creativity, inviting new team members to share their ideas and methodologies. Bring your expertise, and we'll share our knowledge in a collaborative and enjoyable atmosphere. At ClearScore, our world-class engineers are pivotal in fulfilling our mission to enrich the financial lives of millions. To learn more about our technology stack, visit our 2026 Tech Radar. Discover our work culture through our Behavioural Principles and Engineering Principles. Explore additional insights on our Tech Blogs on Medium. Your Responsibilities: Design, develop, and maintain full-stack solutions using Node.js and TypeScript, delivering data-driven user interfaces and backend services. Create intuitive client UX utilizing design systems and server-driven UI frameworks. Optimize and scale databases for large-scale applications, employing SQL, PostgreSQL, and indexing strategies to ensure performance and maintainability. Collaborate closely with skilled colleagues to implement, monitor, and optimize real-time data pipelines with Kafka, ensuring robust message handling and distributed system performance to enhance your features. Take ownership of end-to-end performance optimization, both client-side and server-side. Lead the deployment and maintenance of production-grade code and databases across multiple global markets. Monitor post-release performance, utilizing tools for reliability and system health. Engage in an Agile environment, mentoring team members across various specializations and fostering a culture of learning and continuous improvement.

Join our passionate team at Ledger, where we are dedicated to redefining the landscape of digital ownership. Our mission is to empower users, creators, and enterprises to take control of their value with unparalleled freedom through technology that is accessible to everyone. We thrive on innovation, fostering a culture of curiosity and problem-solving that encourages every team member to challenge norms and develop groundbreaking solutions. At Ledger, we are committed to making self-custody accessible, giving individuals the keys to their financial futures. If you’re eager to make a significant impact, we invite you to become part of our journey.As the leading global platform for digital assets and Web3, Ledger secures over 20% of the world’s crypto assets through our advanced hardware wallets, with more than 7.5 million units sold across 200 countries. With headquarters in Paris and offices in various locations including London, we employ around 600 skilled professionals dedicated to developing secure products and services that allow individuals and businesses to manage their crypto assets with confidence.The TeamYou will be an integral part of the E-commerce Engineering team, which is responsible for the entire customer experience on ledger.com. This team oversees the customer journey from discovery to checkout, utilizing a modern technology stack (Next.js, Shopify, Contentful, Vercel) to deliver high-performance, conversion-optimized experiences.In our dynamic, product-focused environment, we prioritize frequent deliveries and continuous optimization in performance, SEO, and conversion rates.What You’ll Be DoingAs a Senior Frontend Engineer, you will play a pivotal role in shaping the web experiences that millions of customers rely on. This hands-on position involves significant ownership, where you will lead complex projects from conception through to production, influence technical direction, and uplift team standards through mentorship.Your responsibilities will include:End-to-End Project OwnershipLead the development of impactful features from inception to deployment.

Why Join Socure?At Socure, we are at the forefront of establishing the identity trust infrastructure for the digital economy, ensuring the verification of 100% legitimate identities in real-time while preventing fraud before it occurs. Our mission is vast and our challenges are intricate, impacting businesses, governments, and millions of individuals worldwide every day.We seek individuals who are eager to embrace significant responsibilities. If you are someone who thrives in a fast-paced environment, thinks critically, acts with ownership, and is deeply committed to delivering precise solutions for our customers, you’ll find your place here. This is not a setting for those who prefer predictability or limited scope. If you are driven to help shape the future of identity with a team that maintains high standards, continue reading.As a Senior Frontend Engineer on our RiskOS team, you will play a crucial role in developing intuitive, high-performing, and reliable web applications that empower our users to proactively identify and mitigate risks. You will engage in every aspect of the software development lifecycle—from architectural design to implementation, testing, and production support. By leveraging modern frontend technologies and best practices, you will not only advocate for optimal solutions but also mentor fellow engineers. This role is ideal for frontend specialists who are passionate about creating design systems, enhancing user experiences, and making a considerable impact at scale.Your Key Responsibilities:Design and develop robust user interfaces based on high-fidelity designs and functional specifications of varying complexity.Collaborate closely with product managers, designers, and engineers to deliver a customer-focused product that exceeds expectations.Take ownership of features from design reviews to production deployment, ensuring high quality, usability, and performance.Develop comprehensive unit, integration, and end-to-end tests to ensure code robustness and extensive functional coverage.Translate complex technical and product challenges into manageable tasks and drive them to successful completion.

About the RoleWe are excited to announce an opening for a Senior Frontend Engineer who will take charge of the user interface layer of ThreatAware's dynamic platform. Your main responsibilities will include developing the dashboard, enhancing data visualization, and crafting interfaces for our innovative AI-powered features. You will be working with TypeScript using Angular and React, reporting directly to the Head of Engineering, and collaborating closely with our R&D teams to seamlessly integrate AI functionalities into our platform. If you have a passion for creating stunning interfaces, an eye for detail, and a desire to tackle complex UI challenges with significant real-world implications, this position is perfect for you.Why Join ThreatAware?At ThreatAware, we provide security teams with a comprehensive source of truth for every device and tool within their organization. With over 150 integrations, rapid deployment in under 30 minutes, and real-time visibility across entire IT infrastructures, we have earned the trust of sectors such as finance, legal, energy, and healthcare. We're on a mission to build something even more impactful. After six years of curating accurate cyber asset data, we are now integrating AI to offer new methods for security teams to analyze their data, automate workflows, and proactively manage risks before they escalate. In this role, you will design intuitive interfaces that enhance user experience.Your ResponsibilitiesTake ownership of the frontend that transforms intricate security data into clear insights.Design and develop the platform dashboard and AI workspace UI using TypeScript (Angular and React) — ensuring a data-rich, real-time experience used daily by enterprise security teams.Tackle challenging visualization problems: managing thousands of security events, device interconnections, and AI-driven insights without overwhelming users.Establish a robust component architecture, design systems, and frontend standards that evolve as the team and product expand.Collaborate closely with R&D to translate AI capabilities into user-friendly, polished interfaces.Partner with product and design teams to define and enhance the user experience, rather than just executing it.Mentor junior frontend engineers and elevate the quality of frontend development within the team.Qualifications We SeekExtensive experience with TypeScript, Angular, and React, with a deep understanding of component architecture, state management, and performance optimization.A strong aesthetic sensibility, with a commitment to creating beautiful interfaces and a keen awareness of modern design trends, paying close attention to the details that contribute to a polished product.Proven track record in building data-intensive, high-performance web applications, ideally those that involve real-time data or complex visualizations.Ability to work in a collaborative environment and effectively communicate ideas and solutions.Prior experience in mentoring and guiding junior team members is a plus.

Grafana Labs stands at the forefront of open-source innovation, with over 20 million users worldwide leveraging our powerful visualization tool to monitor a diverse range of metrics—from environmental changes to sports analytics. Our dashboards have become iconic, appearing in high-profile settings such as NASA launches, the headquarters of Minecraft, and major sporting events like Wimbledon and the Tour de France. Additionally, we empower more than 3,000 organizations, including renowned names like Bloomberg, JPMorgan Chase, and eBay, to optimize their observability strategies using the Grafana LGTM Stack, available as both a fully managed service via Grafana Cloud and a self-hosted solution via Grafana Enterprise Stack, featuring robust tools for metrics, logs, and traces.As we experience rapid growth, we remain committed to our core values: an open-source foundation, a collaborative global culture, and a dedication to impactful work. Our team excels in an environment driven by innovation, transparency, autonomy, and trust.If the prospect of this role excites you, we encourage you to apply, even if you don’t meet every single qualification—this could be a pivotal moment in your career.Senior Frontend Engineer, AlertingThis is a remote opportunity, and we welcome applications from candidates based in the UK.Your Role:The Grafana Alerting team is integral to the Grafana open-source project (link), with the mission to develop advanced features for users to manage their alerts efficiently. Our backend-focused team collaborates closely with customers and the Grafana Cloud teams to enable alerting capabilities both on-premises and at scale in the cloud.Given the breadth of our domain, here are some recent projects we've tackled:Developing distributed systems to enhance the scale of alert ingestion and delivery for Prometheus-based alerts.Standardizing alert setup and delivery processes for both Grafana and Prometheus-based alerts.Creating distributed systems capable of evaluating Grafana-managed alerts at an astonishing rate of over 500 evaluations per second in production.Join us in shaping the future of monitoring and alerting!

TransPerfect is searching for a Senior Frontend Engineer to join its London team. This role centers on building and refining software products that support both internal operations and client-facing solutions. The Senior Frontend Engineer will help guide development, quality, and delivery across a range of projects. The work involves collaborating with a global team to improve user experiences and streamline complex workflows. TransPerfect’s TechOps group has supported the company’s growth for over ten years, focusing on technology and services that make processes simpler for users and clients alike. Role overview Lead and contribute to the development of frontend features for software products Oversee quality and execution throughout the product lifecycle Work closely with international colleagues to deliver scalable solutions What we look for Experience in frontend engineering at a senior level Ability to collaborate within a global, cross-functional team Interest in improving both internal and client-facing systems This position is based in London and offers the chance to contribute to a company that values innovation and practical problem-solving.