Principal Full Stack Software Engineer- Java, Spring Boot, React/Angular, AWS

Fidelity Investments • Merrimack, NH

2d • Hybrid

About The Position

We’re seeking a highly skilled Principal Full Stack Developer with deep expertise in Java and Spring Boot to help build modern, scalable, and cloud‑enabled market data applications. Many of the systems you’ll develop may be internet‑facing or externally accessible, requiring a strong focus on secure design, data protection, and resilient architecture from the outset. In this role, you will design, develop, test, and deploy services that support Fidelity’s mission‑critical market data ecosystem. You’ll work with technologies such as Java, Spring Boot, REST APIs, Angular/React, Apache Camel (nice to have), AWS, and distributed databases. Collaboration across engineering, architecture, and product teams will be essential as you deliver high‑quality solutions that help millions of Fidelity customers make informed financial decisions. This opportunity offers hands‑on experience with core Fidelity financial systems and the chance to build applications that power some of our most high‑value data pipelines.

Requirements

• 8+ years developing enterprise applications with Java
• 8+ years building microservices using Spring Boot
• Strong full‑stack experience with modern front‑end frameworks (React, Angular, or similar)
• Proficiency in REST API design and implementation
• Knowledge of secure coding practices and OWASP considerations
• Experience with API authentication/authorization (OAuth2, OIDC, JWT)
• Ability to protect data in transit and at rest
• Understanding of threat exposure, rate limiting, and input validation
• Hands‑on experience with AWS services (EC2, EKS, S3, Lambda)
• Experience with databases such as Oracle, Cassandra, PostgreSQL, or YugabyteDB
• Familiarity with CI/CD and containerization tools (Jenkins, GitLab, Docker, Kubernetes)
• Strong automated testing skills (unit, integration, performance)
• Delivery‑focused mindset with strong collaboration and commitment to engineering excellence
• Strong troubleshooting abilities across application, system, and network layers
• Bachelor’s or Master’s in Computer Science or related field

Nice To Haves

• Development experience with Apache Camel

Responsibilities

• design, develop, test, and deploy services that support Fidelity’s mission‑critical market data ecosystem
• Collaboration across engineering, architecture, and product teams
• delivering high‑quality solutions that help millions of Fidelity customers make informed financial decisions

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level