We’re small, but we see the big picture.

Our speciality is data-driven and data-dense web applications, where the clear display and visualization of information is essential to success. The majority of our work is in FinTech, where we design and deliver web-based tools for the financial sector. We’ve worked directly with traders and fund managers to create innovative new applications for portfolio management, risk analysis, trade capture, and oversight.

We have worked in multiple other industries, including education, medicine, advertising, and construction. Regardless of the sector or project, we care deeply about every step of the development process – from idea to back-end development to visual design and experience.

Our mission is to provide you with a development shop that listens, understands, delivers, and delights. You, your ideas, and our team – working together to build something great.


We embrace a wide range of tools, languages, and frameworks, and we are always tracking the latest trends and technologies in the world of HTML5, web, and Javascript development. That said, we have a few favorite tools that we use again and again to deliver polished and high-performance applications to our clients.

Hoist: our toolkit for rapid application development

Built on a tight integration of server and client technologies, Hoist provides an opinionated yet flexible foundation for building and operating enterprise web applications.

Support for soft-configuration, user preferences, activity tracking, and more come ready to use with client and server-side APIs and utilities. Developers and DevOps admins can adjust configuration parameters across multiple environments, view and search server logs, and access application-specific admin modules from within a dedicated and extensible management application.

Simple but effective activity, error, and performance tracking is integrated with core operations such as application loading and Ajax requests. The admin application allows for browsing, searching, and quick charting of activity data and daily visits. Monitoring APIs are provided by the server-side libraries to collect and check business-specific metrics. Runtime checks and alert thresholds can be configured and run via the admin client or monitored via JSON endpoints.

Custom components and plugins provide some large and small additions to the standard toolkits we deploy toolkit. Examples include a grid-based editor for streamlined CRUD interfaces, bundled and customized D3 visualizations, tools for dashboard layout and management, and specialized components for data-dense mobile views.

React: A framework for modern JavaScript UIs

The fundamental technology for the Hoist front-end is React, the innovative (and industry standard) framework for creating modern JavaScript UIs. React provides a declarative, flexible, and predictable glue layer for building components and applications. We provide a suite of highly customized React components for data manipulation, layout, and visualization. Using React, we are able to integrate best-of-breed libraries such as BlueprintJS, HighCharts, AG Grid and D3 seamlessly into Hoist.

Along with React, we make extensive use of MobX, an observable-based state management system. MobX is ideal for building highly Reactive applications with minimal boilerplate, allowing developers to focus on business logic, and user experience, rather than state management.

Grails: enterprise Java for an agile world

We make extensive use of Grails, a framework for rapid web application development underpinned by enterprise-grade Java technologies such as Spring and Hibernate. Grails provides a flexible yet robust MVC architecture, strong support for data validation and transactions, and a wide ecosystem of plugins (including our own custom plugin, Hoist).

Grails is based on Groovy, a dynamic language built on Java that brings the expressiveness and power of modern scripting languages (such as Python or Ruby) to the JVM. Groovy is fully interoperable with Java, allowing us to integrate our clients’ existing Java services and APIs with a modern web toolkit.

With much of our development work in the financial sector, we’ve found the combination of a modern web framework and enterprise-grade Java support to be an especially winning combination. We’ve integrated our applications with industry-standard APIs from Bloomberg, FIX messaging feeds, Documentum, realtime pricing providers, and more.

Modern web tech: Javascript data visualization, HTML5 canvas, and CSS3

Hand-in-hand with Grails and React, we employ a range of other web technologies to bring our clients’ ideas to life. These include web-based data visualization libraries such as the D3 Toolkit and advanced charting libraries such as Highcharts. We’ve leveraged tools like these to build high performance custom components: canvas-based heatmaps that can visualize the performance and risk of huge portfolios at a glance, or charting tools to review multi-year performance histories or data-dense price charts.

We have embraced CSS tools such as Less and Sass, and can’t imagine working without them. We consider the visual presentation, iconography, and typography of all our projects to be essential components to their effectiveness and success.


East Coast HQ – Westchester County, NY

Our New York office is in the village of Larchmont, easily accessible via train from New York City.

178 Myrtle Boulevard
Suite 101
Larchmont, NY 10538

West Coast HQ – Sonoma County, CA

Our California office is located in the Russian River Valley in Sonoma County, a bit north of San Francisco.

14012 Armstrong Woods Road
Suite F 
Guerneville, CA 95446 

Client Support

If you are a current client, please contact us on support@xh.io or +1.844.394.4767 for immediate assistance.