CareerPlan

Senior Software Engineer (Backend)

Seattle, WAFull-time2026-09-20 → 2026-11-09
On-site · United States

Core

Building and scaling backend systems for an AI scheduling assistant that coordinates calendars, emails, and external APIs for founders and executives.

Role type

Senior Backend Software Engineer (AI/LLM integrations)

Builds

Scalable backend services, API integrations, and internal trainer tooling for human-in-the-loop workflows

Domain

Applied AI / Scheduling Automation

Deliverable

production ML models | product features

Required skills

TypeScript (strict mode), distributed systems design, concurrency management, async job processing, database design, API development, LLM integration

Preferred skills

Startup experience, AI/LLM project experience

Technologies

TypeScript, LLMs

Responsibilities

Design and scale backend services for scheduling and API orchestration; Build interfaces between backend systems, LLMs, and clients; Develop internal trainer and operations tooling; Contribute to architecture decisions

Seniority

Senior, hands-on IC