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Senior Full-stack Developer at Athlon. We're on the hunt for a Senior Full-stack Developer, who is excited by shaping both the front end and back end of our projects - crafting intuitive, engaging user experiences while also engineering the systems, APIs and integrations that make them robust, scalable and secure. . From complex web apps to best-in-class marketing sites, you’ll spend much of your time hands-on: writing clean, efficient code and ensuring best practices are championed across everything we deliver.. Working alongside our Technical Lead, you’ll support and contribute to architectural decisions, help shape technical approaches and liaise directly with clients to understand project objectives - translating requirements into well-structured and effective technical solutions. . Sitting at the intersection of creativity and technology, you’ll take a wide view across infrastructure, engineering and systems - finding smart, innovative ways to build world-class digital products and bring Brave ideas to life.. If you’re methodical and collaborative, communicate with clarity, and have a passion for technology and digital storytelling, this is your chance to make an impact - while having fun doing it.. Hands-on Development. . Lead front-end and back-end development across a range of projects . . Collaborate with designers and project managers to translate requirements into technical implementations . . Write clean, efficient and maintainable code to create responsive, accessible user interfaces . . Build and maintain scalable back-end solutions . . Implement thoughtful, performance-conscious animation and transitions to elevate the user experience . . Troubleshoot complex issues across the stack and propose practical, effective solutions . . Support deployment and light DevOps tasks as required. . Technical Planning. . Help shape the technical approach and deliver solutions that support the client’s goals . . Liaise directly with clients to understand requirements . . Conduct thoughtful research and creative problem-solving of technical challenges . . Support architectural decisions by providing input on frameworks, tools and approaches . . Input into technical briefs and specifications that yourself and other developers can follow . . Provide accurate technical estimates, working closely with project managers to develop a detailed delivery plan that accounts for technical dependencies and mitigates risk. . Technical Standards. . Maintain high technical standards as the lead developer on your projects., . . Clear, confident and articulate presentation of appropriate solutions to clients, serving as their primary technical contact. . Collaborate with designers to ensure creative concepts are executed to spec. With a sharp eye for design fidelity, you care about maintaining visual consistency, polish and motion detail.. . Ensure a high level of technical quality is maintained across projects from discovery to launch.. . Follow best practices consistently across accessibility, security and performance.. . Passion & Culture. . Suggest ideas that improve our output, ways of working and cultural activities . . Excite and engage those around you to bring about the best outcomes . . Regularly share best practices and inspiration across technology and craft . . Stay curious about emerging technologies, such as AI, and explore how they could add value . . Suggest ideas, tools and systems that maximise the effectiveness of our processes and work . . Be open to speaking at industry events and panels, helping raise the profile of Athlon in the public domain. . What we expect from.... Your Craft:. . Front-end languages (e.g. HTML, CSS/SCSS/Tailwind, JavaScript/TypeScript, and frameworks like React, Next.js or Vue) . . Some experience with back-end languages (e.g. Node.js, PHP, Java, etc.) . . Strong understanding of the WordPress ecosystem . . Animation for the web (e.g. CSS animations, GSAP, Framer Motion, Lottie) . . API integration . . GIT workflows and CI/CD automation . . Cloud services (e.g. AWS, GCP or Azure) . . A solid understanding of software design patterns. . Your experience:. . Minimum 5 years agency experience . . Has experience leading technical projects. . Full-stack development skills and a flexible, tech-agnostic mindset . . How we work. Your line manager is the Delivery Director. Company Location: United Kingdom.