Principal Fullstack Engineer (AI) - Boston

Pragmatike is hiring a Principal Fullstack Engineer (AI) - Boston for a remote role open to applicants in United States. Level rates it ; you can apply on Pragmatike.

Level's read on this job

On Level's scale, this software engineer role is Works on AI ●●●○: the daily work is on AI products, without building the model.
The posting lists this role as remote.
Tools and skills the posting cites include Databricks, Node.js and React.
Level classifies it as a senior role.
Level lists 51 other open roles at Pragmatike.

AI in this role

Build scalable full-stack web applications and user interfaces powering data-intensive AI products for enterprise customers.

databricksnode-jsreacttypescriptpostgresqlmongodbaws

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 (Node.js + 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 end—from backend architecture to polished frontend delivery—someone who can design APIs, build scalable services, craft intuitive user interfaces, and ship production-ready features at scale.

What You’ll Do

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.

What We’re Looking For

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.

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 training.We 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.

How we rate this

Principal Fullstack Engineer (AI) - Boston at Pragmatike rates 65 out of 100 for how much of the daily work is AI. That makes it Works on AI (AI Level 3 of 4). The level is about AI in the job, not seniority.

Classification

Works on AI. The daily work is on AI products, without building the model.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.

Key facts

Principal Fullstack Engineer (AI) - Boston is an open job at Pragmatike.
Level rates this role AI Level 3 of 4: Works on AI.
The role is based in Cambridge and is marked remote.
The job was posted on August 3, 2026.
Seniority: senior.
Applications are handled by Pragmatike. Apply on Pragmatike

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

DatabricksNode.jsReactTypeScriptPostgreSQLMongoDBAWS

Also common in software engineer jobs at this level

Python LLM Java Kubernetes AI agents C++

Pay

Typical software engineer job: $168k

This posting doesn't list pay. Use the typical software engineer figure when pay comes up. See software engineer jobs

Questions you could be asked

What's a project where you used Databricks hands-on?
Walk me through how you've used Node.js in your day-to-day work.
What are the limits of React that you've run into, and how did you work around them?
What's a project where you used TypeScript hands-on?
Walk me through how you've used PostgreSQL in your day-to-day work.

Adapt your resume

List these exact terms on your resume: Databricks, Node.js, React, TypeScript, and PostgreSQL. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
Show where AI is part of your daily process, not a one-off project. This role expects it to be a running habit.

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