Senior Frontend Developer (New York City Metropolitan Area)

Who Is InRhythm?

InRhythm is a leading modern product consultancy and digital innovation firm with a mission to make a dent in the digital economy. Founded in 2002, InRhythm is currently engaged by Fortune 50 enterprises to bring their next generation of digital products and platforms to market. InRhythm has helped hundreds of teams launch mission-critical products that have created a positive impact worth billions of dollars.

InRhythm's unique capabilities of Product Innovation and Platform Modernization services are the most sought-after. The InRhythm team of A+ thought leaders don't just get an assignment, they join the company to do what they love. It's that passion that has helped us grow rapidly and consistently deliver on our commitment to helping clients develop better, faster, and in rhythm.

What We Do At InRhythm

We bring enterprises' most urgent, important products to market with high-velocity, high-quality and 10x impact. We enable innovative cultures by coaching teams with the right mix and maturity of modern tools, methods, and thought leadership.

This is a unique opportunity to get in on the ground floor of an evolving team. InRhythm clients include a broad range of highly visible and recognizable customers, including, but not limited to:

• Goldman Sachs
• Fidelity
• Morgan Stanley
• Mastercard

From greenfield to tier-one builds, our clients look to us to deliver their mission-critical projects related to product strategy, design, cloud native applications, as well as mobile and web development. The projects we work on literally change the world.

We are looking for a Senior UI/Frontend Engineer:

As a Senior UI/Frontend Engineer with 100% focus on frontend development, you will work with lead-level and fellow senior-level engineers to architect and implement scalable, data-driven user interfaces. You will develop performant and robust web applications using modern JavaScript frameworks while supplying the continued evaluation and advancement of web technologies in the organization.

At InRhythm, you will:

• Build and maintain complex, data-heavy UI features using React and TypeScript in a 100% frontend-focused capacity
• Work extensively with AG Grid to build, optimize, and maintain sophisticated grid-based data views and complex data displays
• Create and maintain calculator functionality that enables users to run their own simulations with intuitive, responsive interfaces
• Maintain and extend a comprehensive UI component library used across dashboard and calculator functionality, ensuring consistency and reusability
• Manage CI/CD pipelines for frontend codebases with DevOps knowledge and best practices for deployment automation
• Work with clients to architect solutions that solve real-world frontend challenges
• Provide technical estimates and milestones for frontend features and stories
• Mentor junior engineers and contribute to the growth of InRhythm via technical interviews

What you bring to the table (Core Requirements):

• 5+ years of professional JavaScript/TypeScript development in enterprise-level domains
• Extensive, production-level expertise with React and modern JavaScript frameworks
• Deep, hands-on experience with AG Grid in production applications—including complex configurations, performance optimization, and custom integrations
• Proficiency with TypeScript and modern ES6+ JavaScript features
• Working knowledge of DevOps practices for managing CI/CD pipelines and deployment automation
• Experience building and maintaining reusable UI component libraries at scale
• Strong understanding of responsive design, accessibility (a11y), and web performance optimization
• Solid verbal and written communication and consultant/client-facing skills; a true consultant who takes initiative and is a self-starter

Nice to have:

• Experience with Angular or other frontend frameworks
• Knowledge of Java or backend technologies (helpful for working with full-stack teams)
• Experience with build tools (Webpack, Vite, etc.) and their optimization
• Familiarity with financial or asset/wealth management domain applications
• Prior experience with data visualization libraries and complex financial applications

What makes you stand out from the pack:

• You have pushed UI code into production and have shipped multiple complex web applications to market
• You are a true craftsperson in frontend development—someone who is an avid practitioner and stays current with modern web technologies
• You have worked on long-term tenures at enterprise-level organizations, building sophisticated user interfaces at scale
• You enjoy coaching junior engineers on frontend best practices, but want to remain hands-on with code
• Experience in payments or asset/wealth management domain applications is a plus
• Open to work on-site - 5 days per week

Why Be an InRhythmer?

People at InRhythm are entrepreneurs and innovators at heart and problem solvers who find new ways to overcome challenges. InRhythm continues to evolve and grow – and is now prepared to accelerate scale with the addition of this role to our community.

We've been named an Inc. 5000 Hall of Fame Fastest Growing Company for 9 years, Deloitte Fast 500 company for 5 years, and Consulting Magazine Fastest Growing Company winner several years in a row. If you're looking forward to working with awesome colleagues in a high-growth environment and tight-knit community, we're looking forward to hearing from you!