Pricipal Fullstack Engineer (Java,React,LLMs)

Principal Full-Stack Engineer

We are hiring a Principal Full-Stack Engineer to join one of the largest banking institutions in the U.S. – a highly complex, high‑impact environment where engineering decisions truly matter. What you’ll be doing:

Lead the design and development of scalable backend services in Java (Spring Boot) Build and optimize secure, high-performance APIs Contribute to and guide React-based frontend architecture Work hands‑on with LLM/AI technologies (Claude or similar), integrating them into real-world applications Drive best practices across code quality, architecture, and performance Mentor engineers and support UI developers in delivering high-quality solutions Partner with stakeholders to translate business needs into technical execution Contribute to system design discussions, code reviews, and continuous improvement What we’re looking for:

Strong experience in Java backend development and server‑side architecture Solid React experienc...