Senior Fullstack Engineer — AI-First, Remote

Postscript; United States; Remote; USD 175,000 - 205,000; Full time

Benefits offered by this job

Equity

Remote work

Health, dental, vision insurance

Flexible PTO

Growth opportunities

Job summary

Postscript is an AI messaging platform powering 20,000+ Shopify brands and expanding its AI-first product suite. We seek a Senior Fullstack Engineer to join the Customer Context team to design and scale foundational services, APIs, and data pipelines that drive revenue and targeting accuracy.

This fully remote role, based in the US or Canada, emphasizes ownership, leadership, and hands-on engineering across backend and data-heavy systems with a strong AI focus.

Qualifications

• 6+ years of experience building large-scale data-intensive backend systems and APIs.
• Active daily user of AI coding tools (Claude Code, Codex, Cursor, Copilot) and able to discuss impact on output.
• Experience with distributed systems, REST APIs, and backend services.

Responsibilities

• Take ownership of systems and product areas, becoming the go-to technical expert.
• Investigate, design, and implement solutions across distributed systems with ambiguity.
• Architect, build, and maintain scalable REST APIs and backend services for internal and external use.
• Drive modularization and reduce technical debt for long-term maintainability.
• Build auto-driven agent workflows and manage output and workflow alignment.

Skills

Python

Go

Rust

React

TypeScript

AI tooling (Claude Code, Codex, Copil​

Tools

Kafka

Flink

Spark

AWS

Kubernetes

Datadog

Signoz

Job description

Postscript is an AI messaging platform powering 20,000+ Shopify brands and expanding its AI-first product suite. We seek a Senior Fullstack Engineer to join the Customer Context team to design and scale foundational services, APIs, and data pipelines that drive revenue and targeting accuracy.

This fully remote role, based in the US or Canada, emphasizes ownership, leadership, and hands-on engineering across backend and data-heavy systems with a strong AI focus.