Senior Platform Engineer (Onsite - SF)

Seam • San Francisco, CA

92d • $170,000 - $220,000

About The Position

We're looking for a Senior Platform Engineer to join our 3-person platform squad. You'll own the systems that make our engineering team productive and our APIs reliable. Your focus: build efficient TypeScript tooling that lets engineers ship device integrations in days instead of weeks, create fast testing infrastructure, scale our background workers, and improve observability across our platform. We're growing rapidly into enterprise and need rock-solid infrastructure without sacrificing developer velocity. We value pragmatism over perfection. Ship fast, learn quickly, iterate. You should be comfortable diving deep into TypeScript, optimizing PostgreSQL queries, and teaching the team what you learn.

Requirements

• 5+ years backend engineering with platform/infrastructure focus
• Expert TypeScript and PostgreSQL (query optimization, scaling)
• Strong distributed systems and background job processing experience
• Experience building fast, reliable CI/CD pipelines
• Infrastructure as code experience

Nice To Haves

• Experience building developer tooling and frameworks
• API-first or developer tools company background
• Observability tools (DataDog, Grafana)

Responsibilities

• Design systems handling millions of API requests and complex background jobs for device communications
• Build TypeScript tooling and frameworks that accelerate integration development, improve code sharing, create abstractions that let engineers ship faster
• Optimize PostgreSQL queries, design caching strategies, ensure our platform handles 10x growth
• Transform testing from bottleneck to competitive advantage

Benefits

• 100% employer-paid health insurance + 75% dependent coverage
• 401K, family-building support, mental health services
• Generous PTO
• Daily lunch in SF office
• $170k - $220k base + meaningful equity

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 11-50 employees