Full-Stack Developer (Frontend focus) at unlimit

About Unlimit   Unlimit is the global fintech powerhouse behind the world’s largest proprietary payments infrastructure. Founded in 2009, Unlimit operates across 17 global offices with 700+ experts, seamlessly integrating 1,000+ payment methods into a single platform. From London to São Paulo, we empower businesses to scale across borders with a unified suite of financial tools — including payment processing, alternative payment methods, multicurrency business accounts, card issuing, banking-as-a-service, and crypto on- and off-ramps. Our mission is to break down financial barriers and enable seamless money movement across borders. We give forward-thinking businesses the tools to accept, send, and manage payments effortlessly, wherever they operate. About The Job We are looking for a proactive Full-Stack Developer to join our team. You will be responsible for the technical foundation of our ecosystem. We need an engineer who can design frontend architectures from scratch, conduct R&D for new tools, and deliver pixel-perfect, high-performance layouts supported by solid PHP backend logic. Responsibilities • Architecture & Design: Design frontend application architectures from the ground up. Perform technical complexity assessments and create detailed technical designs for frontend solutions. • Development & Engineering: Deliver high-quality, professional web layouts and functional features within sprint cycles. Ensure robust backend support using PHP where required. • Quality Assurance: Maintain a clean and scalable codebase through regular code reviews and efficient bug fixing. • R&D & Innovation: Continuously research (R&D) new libraries and tools, evaluating their potential to improve our development process and product quality. • Planning & Estimation: Actively participate in sprint and quarterly planning. Decompose complex high-level features into manageable technical tasks and provide accurate resource/time estimates. • Process Management: Work closely with the team to ensure architectural consistency across all web products. AI-Native Skills • AI-Augmented Development: Expert use of AI-driven IDEs to delegate unit testing, documentation, and boilerplate code generation. • Context Management: Skill in managing "context" for AI agents to ensure accurate, hallucination-free code generation. • AI-Powered Debugging: Utilizing AI for deep log analysis and automatic generation of performance hotfixes. Requirements • 3+ years of experience in modern Frontend development (React, Next.js or similar). • Strong experience in designing application architecture and making strategic technical choices. • Solid proficiency in backend development with PHP (integration with APIs, business logic). • Professional expertise in HTML5, CSS3 (Sass/Less, Tailwind) and pixel-perfect responsive layout. Practical experience with GitLab CI/CD, Docker, and Git. • Proven ability to decompose business requirements into technical sub-tasks. • Knowledge of SOLID, DRY, KISS principles and experience in writing maintainable code. Join Unlimit Team now! Unlimit is an equal opportunity employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. We welcome applications from all members of society irrespective of age, sex, disability, sexual orientation, race, religion or belief.