Web Developer (Client Portal)

Location
St Louis
Workplace
Hybrid

About this role

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. You’ll also contribute to Exegy’s broader evolution toward delivering more products and capabilities through modern web experiences. Working alongside senior engineers, Product, and Client Services, you’ll help translate complex platform capabilities into intuitive, production-ready web solutions while identifying practical opportunities to incorporate AI into both customer workflows and the software development process.

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

  • Help translate complex platform capabilities, APIs, and technical workflows into intuitive, customer-facing web product experiences

  • Contribute to scalable web patterns and development practices that support future web-based products and capabilities

  • Partner with senior engineers and Product to implement AI-enabled features and workflows where they can improve the customer or developer experience

  • 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

Our Ideal Candidate Has:

  • 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, including FastAPI or Flask, or Node.js for server-side development

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

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

  • Familiarity with AI-assisted software development tools and an interest in using AI to improve development, testing, documentation, troubleshooting, and technical analysis

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

  • Ability to independently own features or well-defined technical workstreams within 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 including OAuth, JWT, and CORS, and performance optimization

  • Background or interest in fintech, capital markets, or market-data technology

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

  • Experience working within globally distributed engineering teams

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