Principal Fullstack Engineer, AI

Pragmatike

Full Stack Engineer developing scalable web applications for a top AI startup. Collaborating across teams to build features and improve system architecture.

Posted 6/4/2026full-timeCambridge • Massachusetts • 🇺🇸 United StatesLeadWebsite

Tech Stack

Tools & technologies

AWSAzureCloudDistributed SystemsGoogle Cloud PlatformJavaScriptMongoDBNode.jsPostgresReactTypeScript

About the role

Key responsibilities & impact

Design, build, and maintain scalable full stack applications using Node.js, 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.

Requirements

What you’ll need

5+ years of experience as a Full Stack Engineer.
Strong proficiency in Node.js (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.

Benefits

Comp & perks

Competitive salary & equity options
Sign-on bonus
Health, Dental, and Vision
401(k)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Node.jsReactTypeScriptRESTful APIsPostgreSQLMongoDBCI/CDscalable applicationsbackend servicesdata models

Soft Skills

collaborationownershipproblem-solvingcommunicationtechnical designimplementationproduction supportdebuggingperformance optimizationbest practices