Principal Full Stack Developer / Finance / Hybrid in NYC

$180000 - $240000 Job Description An award-winning technology consultancy specializing in building bespoke software solutions for the world's leading financial institutions is looking for a Principal Full-Stack Developer to lead the architecture and delivery of mission-critical trading applications for a strategic client. For more than two decades, this company has partnered with Tier-1 investment banks and global asset managers to deliver innovative solutions across cloud computing, enterprise UX, data science, DevOps, and digital transformation. As they continue to expand their footprint within the financial services industry, they are seeking a technical leader who thrives in client-facing environments and enjoys solving complex engineering challenges. In this role, you will serve as both a hands‑on technical leader and trusted advisor, partnering directly with clients to design and build modern trading platforms while leading high-performing engineering teams. You will own technical architecture, mentor developers, and collaborate closely with business stakeholders to deliver scalable, production‑ready applications using modern cloud technologies and front‑end frameworks. This position offers the opportunity to influence technical strategy while remaining deeply involved in software development. This is an outstanding opportunity to join one of the premier technology consultancies serving Wall Street and gain exposure to some of the most sophisticated engineering challenges in financial services. You will work alongside elite engineers and industry experts while building cutting‑edge digital products for the world's largest financial institutions. The role offers tremendous career growth, direct client interaction, and the opportunity to make an immediate impact on high‑profile initiatives. Required Skills & Experience 10+ years of hands‑on software development experience using Python or C# 5+ years of experience building modern applications with React and front‑end state management frameworks Extensive experience designing and architecting cloud solutions within AWS environments Strong experience with Terraform, Docker, and modern infrastructure‑as‑code practices Deep understanding of SQL databases and scalable data persistence strategies Experience designing and delivering enterprise‑grade software into production environments Proven success working within large, complex organizations such as Tier‑1 Investment Banks or Global Asset Managers Bachelor's degree in Computer Science or equivalent professional experience Strong understanding of financial markets, trading systems, and financial products Desired Skills & Experience Experience leading engineering teams on large‑scale enterprise initiatives Strong software architecture and system design experience Experience working directly with enterprise clients and executive stakeholders Excellent communication and leadership skills Experience mentoring and developing engineering talent Strong understanding of modern software development methodologies and DevOps practices Ability to balance technical excellence with commercial and business objectives Self‑starter with exceptional problem‑solving skills and a collaborative mindset What You Will Be Doing Daily Responsibilities Lead the design and development of modern structured products trading applications Partner directly with clients to understand business requirements and deliver technical solutions Architect scalable, cloud‑native applications using modern development practices Serve as a hands‑on engineer while providing technical leadership across project teams Manage engineering deliverables and coordinate with cross‑functional stakeholders Design, document, and oversee technical implementation strategies for production deployments Mentor engineers and establish best practices across development teams Build strong client relationships while serving as a trusted technical advisor Collaborate with business leaders to identify future opportunities and expand strategic partnerships The Offer You will receive the following benefits: Comprehensive Medical Insurance Dental Benefits Vision Benefits 401(k) Plan Paid Time Off Professional Development Opportunities Exposure to Leading Financial Institutions and Enterprise Technologies Career Advancement Through Diverse Client Engagements Collaborative Environment with Industry‑Leading Engineers and Consultants Applicants must be authorized to work in the US on a full‑time basis now and in the future. #J-18808-Ljbffr Kelly Services