Senior Platform Engineer (Onsite - SF) at Unchained

San Francisco, California, United States -

Full Time

Start Date

Immediate

Expiry Date

22 Dec, 25

Salary

220000.0

Posted On

23 Sep, 25

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

TypeScript, PostgreSQL, Distributed Systems, Background Job Processing, CI/CD Pipelines, Infrastructure as Code, Developer Tooling, API Development, Observability Tools, Performance Optimization, Testing Infrastructure, Collaboration, Communication, Problem Solving, Pragmatism, Self-Driven

Industry

IT Services and IT Consulting

Description

Senior Platform Engineer About the role 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. What you'll work on Platform Infrastructure - Design systems handling millions of API requests and complex background jobs for device communications Developer Experience - Build TypeScript tooling and frameworks that accelerate integration development, improve code sharing, create abstractions that let engineers ship faster Performance & Scale - Optimize PostgreSQL queries, design caching strategies, ensure our platform handles 10x growth Testing & Reliability - Transform testing from bottleneck to competitive advantage Qualifications 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 ## Preferred Qualifications Experience building developer tooling and frameworks API-first or developer tools company background Observability tools (DataDog, Grafana) Why Seam? We build IoT infrastructure that powers smart devices globally. If you've used a code to enter an Airbnb, you've probably used Seam. Our customers range from startups to public companies. Platform engineering here is a force multiplier—you'll directly impact every customer and every line of code we ship. Team includes alums from Nest, Apple, Stanford, YC. Backed by Tiger Global, Root VC, and founders from Stripe, Plaid, Airbnb. ## About You Sharp minds with kind souls. You should be: * Self-driven - identify problems before they're assigned * Pragmatic - ship solutions that work today, build for tomorrow * Collaborative - work closely with product engineers * Clear communicator - explain complex systems simply Interview Process Technical screen (45 min) System design (45 min) Paid work trial day with the team 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 In-person role in San Francisco

Responsibilities

You will design systems that handle millions of API requests and complex background jobs while building TypeScript tooling to accelerate integration development. Your role will also involve optimizing performance and ensuring reliability across the platform.