Principal Fullstack Engineer (AI) Boston

Location: Cambridge MA (Eastern Time / UTC -4)
Relocation package: Available
Start date: ASAP
Languages: English (required)

About the Role

Pragmatike is hiring on behalf of a fast-growing AI startup recognized as a Top 10 GenAI company by GTM Capital founded by MIT CSAIL researchers.

We are searching for a Senior Full Stack Engineer ( React) with strong hands-on experience building scalable high-performance web applications powering complex data-intensive AI products used by Fortune 500 customers.

This role is ideal for an engineer who enjoys owning features end to endfrom backend architecture to polished frontend deliverysomeone who can design APIs build scalable services craft intuitive user interfaces and ship production-ready features at scale.

What Youll Do

• Design build and maintain scalable full stack applications using React and TypeScript.

• Architect and develop robust backend services APIs and data models.

• Build modern production-grade web interfaces with React.

• Own features end to end from technical design and implementation to deployment and production support.

• Optimize performance across the stack (frontend rendering API latency database queries).

• Collaborate closely with product design and AI/ML teams to ship user-facing features.

• Establish best practices around testing code quality observability and CI/CD.

• Improve overall system architecture scalability and developer experience.

• Debug and resolve production issues across both frontend and backend systems.

What Were Looking For

• 5 years of experience as a Full Stack Engineer.

• Strong proficiency in (Express NestJS or similar frameworks).

• Strong proficiency in React and TypeScript in production environments.

• Experience designing RESTful APIs and working with databases (PostgreSQL MongoDB or similar).

• Solid understanding of modern web architecture and distributed systems fundamentals.

• Experience building scalable secure and high-performance applications.

• Familiarity with cloud environments (AWS GCP or Azure).

• Comfortable owning features and shipping to production independently.

• Strong collaboration skills across product design and backend/ML teams.

Bonus Points

• Experience building data-heavy dashboards or real-time web applications.

• Familiarity with modern state management solutions (Redux Zustand React Query).

• Experience with event-driven architectures or message queues.

• Exposure to AI-driven or ML-powered products.

• Startup experience or comfort working in fast-moving ambiguous environments.

Why This Role Will Pivot Your Career

• Research pedigree: MIT CSAIL founders with deep AI and systems expertise.

• Customer impact: Build products used by Fortune 500 clients.

• Industry momentum: Alumni behind major acquisitions (MosaicML Databricks Run:AI NVIDIA W&B CoreWeave).

• Funding & growth: Oversubscribed seed round next funding planned for 2026.

• Ownership: Lead full stack architecture and mission-critical product features.

• Engineering depth: Work on challenging scalability performance and AI infrastructure problems.

Benefits

• Competitive salary & equity options

• Sign-on bonus

• Health Dental and Vision

• 401(k)

Pragmatike is an Equal Opportunity Employer and is committed to providing equal employment opportunities to all applicants without discrimination. We recruit on behalf of our clients and prohibit discrimination and harassment based on race color religion age sex national origin disability status genetics protected veteran status sexual orientation gender identity or expression or any other characteristic protected by federal state or local laws. This policy applies to all terms and conditions of employment including recruiting hiring placement promotion termination layoff recall transfer leaves of absence compensation and are committed to a fair and inclusive hiring process. We process your personal data solely for recruitment purposes in accordance with applicable privacy laws and maintain reasonable safeguards to protect your information. Your data may be shared with our client(s) for hiring consideration but will not be disclosed to third parties outside of the recruitment process.

Required Experience:

Staff IC