SENIOR SOFTWARE ENGINEER

Rosie; Seattle (WA); Remote; USD 180,000 - 320,000; Full time

Benefits offered by this job

Competitive equity

Founders-level ownership

Growth opportunities

Job summary

Rosie is reimagining care, offering on-demand childcare and household management powered by AI. We are building web, mobile, and AI-driven tools to connect families and Pros, with a focus on speed, reliability, and delightful experiences.

As a founding full-stack engineer, you will own AI infrastructure, shape architecture, and lead the engineering team as Rosie scales to new cities, balancing rapid experimentation with production-grade reliability.

Qualifications

• 5+ years of professional full-stack and AI engineering experience.
• Proven experience building production systems with modern frameworks.
• Hands-on experience with AI-powered product features—LLMs, agentic workflows, retrieval, and evals.
• Ability to work full-time, on-site/hybrid in Seattle, WA; travel if remote.
• Strong product sense balancing user needs with technical constraints.
• Experience with React/Next.js, Typescript, Postgres, OpenAI/Anthropic, Inngest, Evals, Agentic AI.

Responsibilities

• Build the core product: Own AI infrastructure and feature development end-to-end.
• Shape technical direction: Foundational decisions on architecture, infrastructure, and tooling.
• Move fast: Ship experiments, iterate on feedback, balance speed with maintainability.
• Collaborate closely: Work with the founding team across product, design, and growth.
• Ensure reliability: Build secure, scalable systems families can trust.
• Lay the foundation for scale: Establish engineering best practices, documentation, and culture.

Skills

Full-stack engineering

AI engineering

React/Next.js

Typescript

Postgres

OpenAI/Anthropic

LLM workflows

Agentic AI

Architecture

Tools

Inngest

Evals

APIs

Job description

Seattle or Remote with travel Full-Time Salary + Competitive Equity

About Rosie

Rosie is reimagining care, for families & for caregivers.

We created a new category of care: flexible, on-demand childcare and household management, bookable by the hour or in a weekly cadence, backed by a bench of vetted Pros who learn your family’s rhythms. Families finally have a way to get the help they actually need with minimal effort.

We're building the infrastructure that powers modern family life: a world where parents book care the way they text a friend, where caregivers build real careers doing work they're proud of, and where having support at home just feels normal. We're expanding to new cities, and we're just getting started.

The Role

You have the opportunity to disrupt and shape how families and caregivers operate in the new age. You’ll build the core product interfaces that families interact with every day, make the foundational calls on architecture and tooling, and set the engineering culture for the entire company. You help decide what we build, how we build it, and how fast we ship while maintaining an extremely high technical bar.

Rosie has three primary customers: families, Pros and the internal team. To run a simple two-sided labor marketplace at scale requires immense complexity behind-the-scenes. Rosie creates beautiful & simple interfaces across web, mobile apps and text message for families and Pros to interact, book and manage their care or jobs. Its the backbone of many families lives and many Pros careers, so the stakes are high. Rosie learns each customer’s rhythms from what it observes and what they tell it, and aims to make every interaction with Rosie easier and better. Behind that simplicity is a mix of agents, LLMs, and software that you’ll design, ship, and harden, always in service of a product that feels magical and earns customers’ trust.

This is a rare seat: full-stack builder, product thinker, and AI researcher in one. You’ll take features from prototype to production, balance speed with the reliability, and stay close enough to families and Pros to know exactly what to build next. You will build and lead the engineering team as Rosie scales across new cities and establish the AI infrastructure and tenets to build the most intelligent platform in care.

Our north star is a product so good that managing a home & growing a career are effortless thanks to state-of-the-art AI with a deliberate human touch. You’ll make it real.

Who You Are

A builder at heart: You thrive on taking ideas from 0 → 1, wearing many hats, and turning vision into reality.

Obsessed with growth: You set the bar unreasonably high and push far past “good enough” to deliver exceptional results.

Driven by outcomes: You’re not looking to clock out of work. You’re willing to flex, adapt, and put in the work required to build and grow Rosie.

Courageous: You run at resistance and find energy where others hear “no.” Obstacles motivate you.

Execution-first: You believe trust is earned by shipping beautiful, functional, and reliable products.

Fast-moving: You thrive in speed and ambiguity, creating clarity instead of waiting for it. You learn, adapt, and improve quickly.

Creative & daring: You challenge conventions, reimagine what’s possible, and infuse delight into the everyday.

Ruthlessly focused: You know how to cut through noise and relentlessly prioritize the one thing that truly moves the needle.

What You’ll Do

Build the core product: Own AI infrastructure and feature development end-to-end, from prototypes to production-ready systems that our customers rely on. Pay close attention to the data and the user feedback to know what to build.

Shape technical direction: Make foundational decisions on architecture, infrastructure, and tooling.

Move fast: Ship experiments, iterate on feedback, and balance speed with maintainability.

Collaborate closely: Work hand-in-hand with the founding team across product, design, and growth.

Ensure reliability: Build secure, scalable systems that families can trust with their most important needs.

Lay the foundation for scale: Establish engineering best practices, documentation, and culture. Eventually help build and lead the engineering team.

Basic Qualifications

• 5+ years of professional full-stack & AI engineering experience (backend + frontend).
• Proven experience building production systems with modern frameworks.
• Hands‑on experience building AI‑powered product features—LLM and agentic workflows, prompt engineering, retrieval, and evals—alongside databases, APIs, and third‑party integrations in high‑availability production systems.
• Ability to work full‑time, on‑site/hybrid in Seattle, WA. If remote, you’re able to travel at least once per month.
• Strong product sense where you care deeply about user experience and balance user needs with technical constraints to ship simple, magical products.
• Demonstrated ability to execute quickly in ambiguous environments.
• Experience with React/Next.js, Typescript, Postgres, OpenAI / Anthropic, Inngest, Evals, Agentic AI.

Preferred Qualifications

• iOS or cross‑platform mobile app development experience via React and Expo.
• Knowledge of security best practices in consumer applications.
• Prior startup or 0→1 product experience. Ex or future founders preferred!
• Experience working with LLMs and AI‑driven products in a production environment, including self‑hosting & tuning models and running evals.
• You love building in consumer or family‑related products.
• You’re a parent or have been a nanny / caregiver!

Why Join Now

• Impact: You’ll write the code and make the technical decisions that shape Rosie for years to come.
• Ownership: Salary + competitive equity, with true founder‑level responsibility.
• Growth: Opportunity to build not just product, but a team and culture from the ground up.

Compensation

Salary + competitive equity for the founding team. Your success is our success. As we grow, so does your compensation.