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 SummaryExegy is seeking a Senior Web Developer to take a leading technical role in the architectural evolution, modern front-end development, and full-stack ownership of our client portal.
In this role, you will assess our existing web platform, guide technical decisions, and deliver responsive, secure, and scalable web applications that redefine how global financial clients interact with Exegy services. You’ll combine sharp front-end engineering skills with solid API integration experience, working closely with Product, Engineering, and Client Services to translate business needs into sleek, production-ready web solutions.
LocationSt. Louis, MO | Montreal, Canada | Belfast, UK (Hybrid)
Take technical ownership of Exegy’s client portal, driving front-end architecture, API integrations, and ongoing web platform development
Assess technical debt, web performance, UI/UX responsiveness, and existing front-end/backend integrations
Design and build responsive, client-facing features using modern JavaScript/TypeScript frameworks (React, Vite)
Develop and maintain robust backend API integrations and microservices using Python, FastAPI, or Node.js
Establish scalable web development standards, including automated unit/E2E testing, CI/CD pipelines, and cloud deployments
Partner with Product Management to turn wireframes, user flows, and business requirements into intuitive web applications
Elevate application security, accessibility, cross-browser compatibility, and runtime performance
Troubleshoot complex client-side and server-side production issues, conducting root-cause analysis and implementing lasting fixes
Provide code reviews, front-end minting, and technical mentorship to peer engineers
Strong professional track record as a Web Developer or Full-Stack Web Engineer delivering production-grade web applications
Advanced proficiency in JavaScript, TypeScript, and modern front-end frameworks (React strongly preferred)
Solid experience designing, consuming, and maintaining RESTful APIs and backend web services
Proficiency with Python (FastAPI/Flask) or Node.js for backend development
Experience with relational databases, web application security (OAuth, JWT, CORS), and state management
Mastery of modern web standards, CSS/HTML architecture, responsive design, and web performance optimization
Hands-on experience with version control (Git), automated testing (Jest, Cypress, Playwright), and CI/CD pipelines
Strong communication skills and the ability to work across technical and nontechnical teams
Demonstrated ownership of complex technical projects or production applications
Experience with React, TypeScript, and Vite build tooling
Experience developing B2B SaaS platforms, enterprise portals, or financial dashboards
Background in fintech, capital markets, or market-data technology
Exposure to cloud deployments (AWS/Azure) and application monitoring tools
Experience in financial services, capital markets, fintech, or market-data technology
Experience working within globally distributed engineering teams
Skills Required
- Production-grade web application development experience
- Advanced proficiency in JavaScript
- Advanced proficiency in TypeScript
- Experience with modern front-end frameworks
- Experience with React
- Experience with Vite build tooling
- Designing, consuming, and maintaining RESTful APIs
- Backend development with Python (FastAPI/Flask) or Node.js
- Experience with relational databases
- Web application security knowledge (OAuth, JWT, CORS)
- Mastery of HTML/CSS, responsive design, and web performance optimization
- Version control with Git
- Automated testing experience (Jest, Cypress, Playwright)
- CI/CD pipeline and cloud deployment experience
- Strong communication and cross-team collaboration
- Demonstrated ownership of complex technical projects
- Experience developing B2B SaaS platforms or enterprise portals
- Fintech, capital markets, or market-data technology experience
- Exposure to AWS or Azure and application monitoring tools
- Experience working with globally distributed engineering teams
What We Do
Exegy provides ultra-high performance, hardware-accelerated computing appliances that process market data for financial organizations. Exegy is the established leader in providing real-time market data solutions with an unparalleled combination of speed, capacity, features, and service. Today Exegy serves as a strategic partner to leading principal traders, agency brokers, exchanges, Alternative Trading System (ATS) and dark pool operators, market makers, hedge funds, and asset managers. Guided by these strategic relationships, Exegy has expanded their offerings to include historical market data solutions that deliver essential testing, analysis, and compliance capabilities to data-driven, automated trading strategies. In addition, Exegy’s investments in Artificial Intelligence (AI) and Machine Learning (ML) drive Signum – a game-changing portfolio of predictive trading signals that are delivered in real-time, synchronously with low-latency market data. Learn more about the Signum portfolio of real-time trading signals at exegy-signum.com. At the heart of Exegy solutions are purpose-built, hardware-accelerated appliances derived from an extensive portfolio of patented and patent-pending technology. All solutions are delivered as a fully managed service backed by a global team of experts and state-of-the-art infrastructure. Exegy delivers a premium user experience from its regional offices in New York, London, and Hong Kong, as well as its 24/7 operations center at its St. Louis headquarters. Exegy promotes the design of robust electronic markets through its MarketDataPeaks service that reports real-time market data feed rates.
