Principal Full Stack Software Engineer - Security

Citizens Financial Group•Iselin, NJ

2d•Onsite

About The Position

As a Principal Software Engineer, you will partner with engineering teams and architecture leaders to deliver high‑quality, forward‑thinking technology solutions. This role provides significant autonomy to lead, design, and implement innovative approaches to complex challenges in the banking industry. You will serve as a peer leader, influencing technical direction and fostering a culture of innovation, accountability, and excellence across teams.

Requirements

7+ years of hands-on software development experience, including building and supporting commercial software products used by non-technical customers
Demonstrated experience leading and mentoring software engineers
5+ years of experience querying, analyzing, and managing large datasets
Proficiency in multiple programming languages and at least one modern front-end framework (Angular, React, or Vue). Languages may include Python3, Java, JavaScript, Ruby, Golang, C, C++.
Hands-on experience with AWS, Azure, or GCP, particularly around managing sensitive assets
Bash and Linux proficiency
CI/CD pipeline experience (CircleCI, Jenkins, or similar tools)
Strong written and verbal communication skills
Cloud certifications such as AWS Solutions Architect
Solid understanding of data structures (arrays, dictionaries, linked lists, custom objects, etc.)

Nice To Haves

3+ years of experience in financial services, ideally in consumer banking, portfolio management, trading, compliance, or wealth management
Knowledge of banking systems and custodial/consumer banking operations
Experience with tools/technologies such as Apache, Lucene, Memcache, RabbitMQ, and NoSQL databases
Strong security expertise: OAuth2/OIDC, JWT, mTLS, OWASP, secrets rotation
Experience with microservices architectures, inter-service communication, and API versioning
Proficiency with OpenAPI/Swagger contract design
Knowledge of Docker and Kubernetes deployment patterns and 12-factor application principles
Deep AWS experience (EKS/ECS, RDS/Aurora, API Gateway/ALB, SSM/Secrets Manager, CloudWatch)

Responsibilities

Operate within an Agile environment, applying best practices and collaborating effectively with team members.
Contribute to solution design discussions, ensuring architectural alignment and successful product outcomes.
Design, modify, develop, and implement robust software solutions using modern engineering practices.
Embed quality attributes—such as scalability, maintainability, and manageability—into distributed, service-oriented architectures.
Apply industry-leading security practices to identify, address, and prevent vulnerabilities throughout the development lifecycle.
Act as a peer leader by promoting innovation, technical rigor, and adherence to Agile methodologies across the organization.