Senior Full-Stack Engineer – AI-Driven Experience, Hybrid

Rainier Recruiting; Seattle (WA); Hybrid; USD 200,000 - 250,000; Full time

Job summary

Rainier Recruiting is seeking a senior Full-Stack Engineer in Seattle, hybrid, to build out our core agentic consumer experience. You will own feature implementation end to end and ship full-stack capabilities across web and mobile surfaces, with authentication, data modeling, and AI-powered streaming at the core.

We expect autonomy, strong craftsmanship, and a generalist mindset to thrive in our fast-paced startup environment.

Qualifications

• Bachelor's degree or higher in CS or related field.
• 5+ years building full-stack systems at scale.
• Comfort operating in ambiguity with high ownership.
• Pride in craft and quality.
• Strong ownership and autonomy.
• Move fluidly across the stack as a generalist.

Responsibilities

• Own product feature implementation end to end.
• Ship full-stack features across web and mobile surfaces.
• Build authentication, consent, and secure accounts.
• Design APIs and data models for durable user memory.
• Implement streaming, real-time interfaces powered by AI.
• Make architectural decisions balancing velocity with long-term leverage.
• Establish and drive coding standards and patterns.

Skills

Full-stack development

Autonomy

Ownership

Craftsmanship

Generalist

Education

Bachelor's degree or higher in CS or related field

Tools

Next.js

React

TypeScript

AWS

Vercel

Temporal

Relational databases

Vector databases

AI runtimes

Job description

Rainier Recruiting is seeking a senior Full-Stack Engineer in Seattle, hybrid, to build out our core agentic consumer experience. You will own feature implementation end to end and ship full-stack capabilities across web and mobile surfaces, with authentication, data modeling, and AI-powered streaming at the core.

We expect autonomy, strong craftsmanship, and a generalist mindset to thrive in our fast-paced startup environment.