Principal Full Stack Engineer

Fidelity • Boston, MA

3d

About The Position

Are you interested in joining a dynamic, innovation focused, high impact team? Do you enjoy building new products and services in a collaborative, fast paced environment? Join Fidelity Labs, our in-house new business incubator, as one of the founding Principal Full Stack Engineers for an early-stage GenAI startup for investment research. In this role, you will be responsible for working across the development and product teams to build and scale a modern. As a Principal Full Stack Engineer, you will play a pivotal role in building new application experiences and business capabilities to support a new business initiative. You will work closely with the Director of Engineering and cross-functional teams, driving technical decisions and ensuring the delivery of scalable, maintainable solutions.

Requirements

• A Bachelor's or Master’s degree in computer science, Engineering, or a related field
• 6 - 10 years of professional software engineering experience, with a proven track record of delivering complex applications.
• 3 - 5 years of technical leadership experience
• Deep full-stack expertise in Python, EKS, HTML, CSS, javascript, Angular, AWS, and databases systems.
• Strong understanding of modular architecture, component sharing, and scalable design principles.
• Experience building and integrating RESTful APIs and working with cloud-native technologies.
• High degree of autonomy and ownership; able to drive projects forward with minimal oversight.
• Excellent communication and collaboration skills, with the ability to influence and align stakeholders.

Nice To Haves

• Prior experience developing Gen AI applications
• Prior work in a startup or incubator environment, building products from the ground up.

Responsibilities

• Lead the design and development of modular, reusable front-end components in Angular, enabling sharing across multiple product teams.
• Architect and implement robust back-end services using Python, EKS, and AWS, with a focus on scalable, secure, and maintainable solutions.
• Champion best practices in modular application design, including micro-frontends, shared libraries, and integration patterns.
• Collaborate with product, UX, and engineering teams to translate business requirements into technical solutions.
• Drive the adoption of modern CI/CD pipelines and DevOps practices for rapid, reliable delivery.
• Mentor and guide other engineers, fostering a culture of technical excellence and continuous improvement.

Benefits

• comprehensive health care coverage
• emotional well-being support
• market-leading retirement
• generous paid time off
• parental leave
• charitable giving employee match program
• educational assistance including student loan repayment
• tuition reimbursement
• learning resources to develop your career

What This Job Offers

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