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 frameworks

• Develop backend services, RESTful API integrations, and data connections using Python or Node.js

• Turn wireframes, user stories, and product specifications into accessible, high-performing web pages and interface components

• Write clean, testable code and expand automated unit, integration, and end-to-end (E2E) testing suites

• Participate in active code reviews, sprint planning, and front-end design discussions

• Diagnose and resolve client-side UI bugs, cross-browser issues, API integration failures, and performance bottlenecks

• Support CI/CD deployment workflows and maintain clear technical documentation for web components and workflows

• Partner cross-functionally to refine requirements and continuously optimize user experience

Qualifications

• Professional experience building, shipping, and supporting production web applications

• Proficiency 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 services

• Experience with Python (FastAPI/Flask) or Node.js for server-side logic

• Solid understanding of core web standards (HTML5, CSS3/SASS, DOM manipulation, responsive design)

• Familiarity with relational databases, Git, automated testing frameworks, and modern web deployment pipelines

• Strong troubleshooting skills and an eager, collaborative approach to problem-solving

• Demonstrated ownership of complex technical projects or production applications

• Strong communication skills and the ability to work across technical and nontechnical teams

Preferred Qualifications

• Experience with React, TypeScript, and Vite build tooling

• Experience with Python and FastAPI

• Experience developing B2B SaaS interfaces, enterprise portals, or client dashboards

• Familiarity with web application security (OAuth, JWT, CORS) and performance optimization

• Background or interest in fintech, capital markets, or market data platforms

• Experience integrating AI-enabled services or workflows into business applications

• Experience working within globally distributed engineering teams