• Design, develop, and maintain high-quality, scalable, and reusable front-end components • Collaborate with UX/UI designers to ensure the technical feasibility of designs and create seamless user experiences. • Work closely with back-end developers to integrate APIs and ensure end-to-end functionality. • Optimize applications for maximum speed, scalability, and responsiveness. • Maintain and improve front-end build systems, tooling, and deployment pipelines. • Ensure cross-browser compatibility and address any browser-specific performance issues. • Stay up-to-date with the latest front-end technologies, frameworks, and industry trends to bring innovative solutions to the team. • Contribute to code reviews, testing, and quality assurance processes to ensure robust and secure code.

• Own and deliver public-facing and internal features that improve user experience, performance, and SEO. • Work cross-functionally with PMs, designers, backend engineers, and QA on an agile team. • Design and implement customer-facing features using Angular, React and TypeScript that meet performance, accessibility (a11y), and SEO goals. • Collaborate with product and design to translate requirements into technical designs and estimates. • Write clean, testable code and maintain a component-driven design system. • Contribute to architecture and non-functional requirements (scalability, security, observability). • Improve site speed and Core Web Vitals by optimizing bundles, rendering strategy, and caching. • Implement and maintain automated tests (unit, integration, and E2E). • Participate in sprint planning, code reviews, and delivery processes from story inception through production rollout. • Support production services on a rotation basis and troubleshoot incidents to minimize downtime. • Mentor teammates and help raise the team’s engineering standards.

• This role owns the frontend of Superluminal, a new perpetuals exchange built at Douro Labs • This is not a role built around a fixed spec • It carries real ownership over how perps trading feels and works for the people • Superluminal is built to be fast and to give traders better pricing than most exchanges currently offer

Role Description We are searching for a Frontend Developer with strong JavaScript expertise to become part of our team. In this position, you will help build sophisticated web applications while working hand in hand with architecture, integration, and product teams. You will play an important role in shaping technical solutions and supporting cross-team initiatives across the wider engineering community. - Write source code for cross-functional components of high complexity using appropriate frameworks - Apply rules and standards during code reviews to sustain quality throughout the codebase - Conduct reviews and analyses in coordination with the Architecture team - Produce estimates and validate them together with the Technical Lead - Take part in technical discovery meetings to help define upcoming initiatives - Join internal team and portfolio meetings to stay aligned with delivery objectives - Participate in meetings with Integration Teams to coordinate cross-team dependencies - Engage in the Architecture Roundtable and assist with Cell Planning activities - Get involved in BCI LABS and Developers Portal initiatives to advance shared engineering practices Qualifications - No less than 2 years of hands-on professional experience in frontend development - Solid front-end proficiency in Angular, HTML5, and JavaScript - Integration background with Java, addressing concepts such as encapsulation, coupling, pooling, asynchronicity, transactionality, persistence, data structures, memory management, and threads - Strong grasp of relational data platforms including engines, SQL, constraints, stored procedures, indexes, and different types of joins - Awareness of NoSQL databases, along with the relevant engines and tools - Applied command of HTML5, CSS3, SASS (ooCSS, BEM), Bootstrap 3, and Material Design for Angular - Confident use of JavaScript (ES5 or higher) and Angular 5 or higher, together with libraries such as Linters and Prettier - Working experience with Node 8 or higher and Express 4 for backend-related tasks - Practical understanding of session and local storage management within the browser - Background in defining, developing, executing, and controlling microservices - Grasp of architecture definition, orchestration, and transactional capabilities for cloud and front-end solutions - Familiarity with the reference model for microservice architecture and the implementation of its components - Applied knowledge of APIs, including development, execution, and security considerations - Understanding of various service interfaces, API exchangers, managers, and portals - Working command of WADL, Markdown, YAML, or JSON for API definition and documentation - Confident English communication at B2 level or higher, in both written and spoken forms Requirements - Prior experience or knowledge of enterprise-oriented products such as 360 Connect