Web Developer (Client Portal)

About Exegy Exegy is a global leader in intelligent market data, advanced trading systems, and future-proof technology. Exegy serves as a trusted partner to the complete ecosystem of buy-side firms, sell-side firms, exchanges, and financial-services technology companies around the globe. Headquartered in St. Louis, with regional offices across North America, the UK and Europe, and Asia Pacific, Exegy has the global footprint to deliver world-class technology, support, and managed services to elite financial-market participants. Job Summary Exegy is seeking a Web Developer to join our engineering team in building, enhancing, and maintaining our client portal and web-based platforms. In this role, you will focus on crafting responsive user interfaces, developing API integrations, and improving front-end performance so global clients can seamlessly interact with Exegy’s services. Working alongside senior engineers, Product, and Client Services, you’ll bring clean code, intuitive UI component design, and solid full-stack web fundamentals to high-visibility production web applications. Location St. Louis, MO | Montreal, Canada | Belfast, UK (Hybrid) Responsibilities Design, build, and maintain responsive, client-facing portal features using modern JavaScript/TypeScript and front-end frameworksDevelop backend services, RESTful API integrations, and data connections using Python or Node.jsTurn wireframes, user stories, and product specifications into accessible, high-performing web pages and interface componentsWrite clean, testable code and expand automated unit, integration, and end-to-end (E2E) testing suitesParticipate in active code reviews, sprint planning, and front-end design discussionsDiagnose and resolve client-side UI bugs, cross-browser issues, API integration failures, and performance bottlenecksSupport CI/CD deployment workflows and maintain clear technical documentation for web components and workflowsPartner cross-functionally to refine requirements and continuously optimize user experience Qualifications Professional experience building, shipping, and supporting production web applicationsProficiency in JavaScript or TypeScript, with hands-on experience using modern front-end frameworks (React strongly preferred)Experience developing and consuming RESTful APIs and connecting backend web servicesExperience with Python (FastAPI/Flask) or Node.js for server-side logicSolid understanding of core web standards (HTML5, CSS3/SASS, DOM manipulation, responsive design)Familiarity with relational databases, Git, automated testing frameworks, and modern web deployment pipelinesStrong troubleshooting skills and an eager, collaborative approach to problem-solvingDemonstrated ownership of complex technical projects or production applicationsStrong communication skills and the ability to work across technical and nontechnical teams Preferred Qualifications Experience with React, TypeScript, and Vite build toolingExperience with Python and FastAPIExperience developing B2B SaaS interfaces, enterprise portals, or client dashboardsFamiliarity with web application security (OAuth, JWT, CORS) and performance optimizationBackground or interest in fintech, capital markets, or market data platformsExperience integrating AI-enabled services or workflows into business applicationsExperience working within globally distributed engineering teams