Principal Full-Stack Developer – Financial Markets New York City (Midtown Manhattan) – Hybrid (3 days onsite) $180,000 – $220,000 + Bonus + Benefits Our client is a specialist technology consultancy partnering with some of the world’s leading financial institutions to build bespoke enterprise platforms, trading systems, and next-generation digital products. They are currently looking for a Principal Full-Stack Developer to join a high-performing engineering team delivering modern trading and financial platforms within a front-office environment. This is a highly hands-on IC senior engineering role combining architecture, technical leadership, and full-stack development. The position would suit someone who enjoys operating within fast-moving, technically complex enterprise environments and is comfortable working directly with senior stakeholders inside large financial services organisations. What You’ll Be Doing • Leading the design and development of modern full-stack trading and financial applications • Building scalable front-end platforms using React / TypeScript • Developing robust backend systems using Python or C# • Architecting cloud-native solutions on AWS using modern infrastructure tooling • Working closely with business stakeholders, product teams, and engineering leadership • Driving technical direction, delivery quality, and engineering best practices • Contributing hands-on across architecture, coding, and production delivery What They’re Looking For • 10+ years of software engineering experience • Strong experience with Python or C# • Strong React / TypeScript front-end development experience • Deep AWS, Docker, Terraform, and distributed systems experience • Experience designing scalable enterprise-grade applications • Strong SQL and data architecture knowledge • Previous experience operating within large-scale financial services, banking, capital markets, hedge fund, asset management, or similarly complex enterprise environments is essential • Strong communication skills and ability to work directly with business stakeholders Additional Information • Hybrid working model with 3 days onsite in Manhattan • Highly collaborative engineering culture • Modern cloud-native tech stack • Greenfield and highly scalable platform work • Existing US work authorisation required Compensation • $180,000 – $220,000 base salary • Bonus + full benefits package