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Member of Technical Staff - Fullstack AI Engineer

solsticeNew York CityEngineering
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Salary
$200K – $300K
Job type
Full-time
Experience
Senior · 5+ yrs
Posted
23 Sept 2026
Status
Open · checked 7d ago

About this role

This role suits an experienced software engineer based in New York City who wants to build fullstack AI platforms and agent orchestration systems for the life sciences sector. Solstice seeks a Fullstack AI Engineer to develop and maintain agent infrastructure and customer-facing interfaces in New York City.

Role Overview

Solstice is hiring a Fullstack AI Engineer for a full-time position located in New York City. The person in this role will build and maintain agent platforms and integrate their capabilities directly into products, working across backend services, APIs, agent orchestration, and user interfaces. The position involves collaborating with product, design, and Applied AI teams to take projects from initial concept through production deployment.

Key Responsibilities

Build and maintain shared agent systems utilizing Python, FastAPI, Restate, and Redis to handle session management, orchestration, tool access, and context delivery.
Design backend services and PostgreSQL data models for document processing, collaboration, and enterprise integrations.
Solve complex agent execution challenges by managing long-running workflows, failure recovery, retries, sandboxed environments, and secure context delivery.
Develop responsive user interfaces using React, Next.js, and TypeScript to display streaming progress, tool activity, and output review tools.
Implement system observability through Datadog, OpenTelemetry tracing, structured logs, metrics, and alerts.
Measure system quality and performance by partnering with Applied AI engineers on evaluations, regression checks, and testing tools like Braintrust.
Own the complete development lifecycle from initial architecture and implementation to deployment and maintenance.

Requirements

Minimum of 5 years of professional software engineering experience building and shipping production software.
Proficiency in Python and FastAPI, including asynchronous programming, validation, authentication, and error handling.
Strong fundamentals in systems design, service contracts, data models, PostgreSQL, Redis, concurrency, transactions, and failure recovery.
Experience building AI applications or infrastructure, including tool calling, context management, and agent sessions.
Ability to deliver across the stack using React, Next.js, and TypeScript.
Experience using traces, logs, and metrics for debugging, instrumentation, and testing.
Strong ownership, judgment, and collaboration skills for solving ambiguous problems and working with cross-functional teams.

Nice to Have

Experience with Restate or Temporal.
Background in sandboxed agent execution or streaming systems.
Familiarity with AI evaluation tools.
Prior experience in the healthcare or pharmaceutical industries.

Skills and Tools

Python
FastAPI
React
Next.js
TypeScript
PostgreSQL
Redis
Restate
Datadog
OpenTelemetry
Braintrust

Salary and Benefits

Base salary range of $200,000 to $300,000 per year
Company equity
Medical, dental, and vision coverage
Unlimited paid time off
401(k) plan with a 4% employer match
Company-provided office lunches five days a week
Professional development stipend
Relocation assistance
Visa sponsorship for O-1, H-1B, and TN visas

About the Company

Solstice builds AI software that helps life sciences teams transform complex scientific and brand information into marketing content. The company has partnered with leading life sciences manufacturers and over 50 pharma brands. Solstice is backed by Transformation Capital, Twelve Below, Virtue, and the founders of Datavant, Commure, and Paradigm.

How to Apply

To apply for this position, please submit your application on the official company careers page.

Skills and tech stack

PythonFastAPIReactNext.jsTypeScriptPostgreSQLRedisRestateDatadogOpenTelemetryBraintrust

Questions candidates ask

What is the salary range for the Fullstack AI Engineer role?

The base salary ranges from $200,000 to $300,000, and the position also offers equity.

Where is the job located?

The role is located in New York City.

How many years of experience are required?

Candidates must have 5 or more years of software engineering experience.

Is visa sponsorship available for this position?

Yes, Solstice provides visa sponsorship for O-1, H-1B, and TN visas.

What primary programming languages and frameworks are used?

The tech stack relies heavily on Python and FastAPI for backend services, alongside React, Next.js, and TypeScript for frontend interfaces.

Ready to apply?

The application is on the official solstice careers page.

Apply on company site