Principal Full Stack Software Engineer

Fidelity Investments • Merrimack, NH

85d

About The Position

Join Fidelity Labs, our in-house new business incubator, as one of the founding Principal Full Stack Engineers for an early-stage SaaS platform targeted at the Charitable sector. In this role, you will be responsible for working across the development and product teams to build and scale a modern SaaS solution. The Software Engineering team delivers next-generation software application enhancements and new products for a changing world. Working at the modern, we build and develop software for platforms, applications and diagnostics - all with the most advanced technologies, tools, software engineering methodologies and the collaboration of internal and external partners. 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

• 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 HTML, CSS, javascript, Angular, Java Spring Boot, JPA, 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

• Experience with micro-frontends, Storybook JS, and API management tools.
• 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 Java Spring Boot, JPA, 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

• Hybrid working model that blends onsite and offsite work experiences.
• Opportunity to work in a dynamic workplace that combines startup life with the stability of an industry leader.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Industry: Securities, Commodity Contracts, and Other Financial Investments and Related Activities