Principal Full Stack Engineer

Grand Circle Corporation•Boston, MA

1d•$165,000 - $175,000•Hybrid

About The Position

The Principal Full Stack Engineer plays a critical role in shaping and delivering the digital experience that drives customer growth across Grand Circle Corporation’s portfolio of travel brands. This role is responsible for leading the strategy and execution of modern front-end development, E-commerce performance, and full-stack solutions, ensuring our web platforms are fast, scalable, and optimized for conversion. This individual will bring deep expertise in React, Next.js, Vercel, and headless CMS architectures, along with a proven ability to lead technical initiatives that improve site performance, strengthen SEO/SEM outcomes, and elevate engineering standards. As a hands-on technical leader, you will guide the team toward modern architectural practices, reduce technical debt, and build high-performing, customer-facing digital experiences. Success in this role requires strong technical leadership, a bias toward action, and the ability to translate business growth goals into scalable, high-quality engineering solutions.

Requirements

Significant experience in software development with a strong focus on front-end engineering and E-commerce platforms
Deep expertise in React and Next.js, including server-side rendering, static site generation, and performance optimization
Experience with headless CMS platforms, including content modeling and API-driven architectures
Proven track record of building high-performing, customer-facing web applications
Strong understanding of web performance optimization and technical SEO best practices
Proficiency in modern JavaScript/TypeScript, HTML5, CSS3, and responsive design
Experience with front-end tooling (Webpack, Vite), testing frameworks (Jest, React Testing Library, Cypress, Playwright), and state management
Full-stack experience with back-end technologies such as C#/.NET or Node.js and API design
Experience mentoring engineers and elevating technical standards within a team
Strong collaboration and communication skills across technical and non-technical stakeholders
Experience with cloud platforms, particularly Azure and Vercel
Solid understanding of software design principles, including Domain Driven Design and SOLID principles
Bachelor’s degree in Computer Science or related field, or equivalent experience

Nice To Haves

Experience with GraphQL and modern API architectures
Experience building and maintaining design systems or component libraries
Familiarity with content preview and editing workflows in headless CMS platforms (ideally Optimizely)
Experience optimizing Core Web Vitals at scale
Contributions to open-source projects or technical thought leadership

Responsibilities

Lead front-end and full-stack engineering initiatives with hands-on ownership of architecture, development, and delivery
Architect and build modern web applications using Next.js, React, and Vercel, leveraging server-side rendering, static site generation, and emerging web patterns
Drive technical strategy for SEO, SEM, and E-commerce performance in partnership with marketing teams
Own and optimize web performance metrics, including Core Web Vitals and Lighthouse scores
Design and implement integrations with headless CMS platforms (e.g., Optimizely) to support scalable and flexible content delivery
Establish and enforce engineering standards, including clear definitions of done, code quality, and performance benchmarks
Mentor and coach engineers, elevating team capabilities through hands-on leadership and best practices
Lead technical decision-making across front-end architecture, tooling, and deployment strategies
Build and deploy applications using modern cloud platforms (Vercel, Azure), including CI/CD pipelines
Partner with back-end teams to deliver cohesive full-stack solutions across C#, .NET, SQL, Docker, and related technologies
Continuously evaluate and introduce new technologies and approaches to improve E-commerce performance and user experience
Balance speed, quality, and scalability in delivering business impact
Collaborate cross-functionally to align engineering efforts with broader company goals