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Lead UI Engineer; React

Job in New York, New York County, New York, 10261, USA
Listing for: ION Group
Full Time position
Listed on 2026-02-26
Job specializations:
  • Manufacturing / Production
    Systems Engineer
Salary/Wage Range or Industry Benchmark: 190000 - 220000 USD Yearly USD 190000.00 220000.00 YEAR
Job Description & How to Apply Below
Position: Lead UI Engineer (React), New York
Location: New York

Lab
49 is an award-winning specialist consultancy that
creates bespoke technology
in partnership with the most important companies in finance. We were founded in 2002 to bring Silicon Valley solutions to Wall Street’s door. Since then, we have worked on successive waves of technological change, including distributed computing, high-speed automation, enterprise UX and digital distribution (for which Lab
49 was among the first significant practices established on Wall Street), Dev Ops, cloud and data science.

Today, we are an established partner in financial markets, having delivered hundreds of projects for clients including all the world’s tier-one investment banks and many of the largest buy-side firms globally.

Being part of Lab
49 means bringing your drive and creativity into an environment where your contributions will make immediate impact. Engineers will work in cross functional teams, consulting directly with our clients, shaping not only technical solutions to business problems but delivering them into production.

The
Principal
Full-Stack
Engineer
will play a critical role on key projects for Lab
49 clients. Working in a collaborative and innovative project team, with direct client-facing interactions, you will have an opportunity to apply your skills and expertise to design innovative applications that solve complex problems and enhance performance and productivity at our marquis clients.

What you’ll be doing:
  • Partnering with our client to lead the design and build of a marketplace experience using modern web development technology and techniques. You will be responsible for managing a team of UI engineers, and the relationships with other key contributors to deliver great software.
  • Managing the technical solution design for a green field application to help launch a startup financial services business. Design, document, and plan for the technical implementation and delivery of working software into production.
  • Contribute to the Interactive Practice:
    The UI engineering team within Lab
    49. This means bringing your passion and opinionated view of what makes for great UI development to the wider UI engineering community within Lab
    49 and helping build the culture of high-quality software development that enables our ability to deliver on client engagements.
  • Act as a hands-on engineer and architect to support work across the Interactive front-end Interactive Practice, from small initiatives to the design and build of complex systems. Lead and actively participate in projects, serving as a role model for project teams and collaborating with other practices to ensure successful outcomes.
  • Partner with client counterparts and stakeholders to maintain and build relationships, maintaining a commercial approach. Develop strong relationships with clients as a strategic partner and technical advisor, contributing to expanding our footprint and securing follow-on work.
  • Partner with the Lab
    49 business development team to create and deliver compelling pitches, defining problems, captivating clients, presenting solutions, and working out engagement terms. Build and reinforce your professional network through active engagement in industry events, public speaking opportunities, etc.
  • Assist in developing effective management skills and practices among line managers in the Engineering practice, fostering strategic career planning and development for the engineering team as a whole.
What you should have:
  • 10+ years of hands-on experience designing and building complex, commercial-grade software applications, with 5+ years leading Agile teams.
  • Proven track record in effective leadership, problem-solving, and decision-making.
  • Experience designing holistic technical solutions, managing integrations with third party services and APIs, and deploying applications into production.
  • Experience managing project teams and interacting with clients in finance, consulting, or start-up environments.
  • A passion for technology and innovation, staying informed about the latest industry trends through active participation in industry events, meet-ups, and more.
  • Experience with JavaScript and Type Script, with modern frameworks specifically React…
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