---
title: 'Senior Fullstack Engineer, Customer Context at Postscript'
canonical: 'https://feeny.ai/job/senior-fullstack-engineer-customer-context-postscript-remote-3ets67z4mhpx'
type: 'job'
last_seen: '2026-11-04'
---

# Senior Fullstack Engineer, Customer Context at Postscript

- **Company:** Postscript
- **Location:** Remote
- **Work type:** remote
- **Posted:** 2026-10-05
- **Last confirmed live:** 2026-11-04
- **Apply:** https://job-boards.greenhouse.io/postscript/jobs/8868675002

## Job description

Postscript is the AI messaging platform trusted by 20,000+ Shopify brands — including Brooklinen, Ruggable, True Classic, and Dr. Squatch.

With a mission to make SMS your number one revenue driving channel, we built the best-in-class SMS marketing platform and launched revenue-driving AI features not available on any other platform. And we're just getting started.

Backed by Greylock and Y Combinator, fully remote since 2018.

We are looking for a polyglot Senior Fullstack Engineer to join the Customer Context  team. You’ll help build and scale the foundational services, APIs, and pipelines that power the Postscript product. This role blends strong backend engineering skills with a deep appreciation for data intensive systems, performance, and reliability. You’ll collaborate closely with other software engineers, data engineers, and product to help e-commerce marketers maximize their revenue with best-in-class targeting and context-driven AI.

This is a high-autonomy role for engineers who are energized by ambiguity, take genuine ownership of their work, and bring a strong point of view on how to build things well, without sacrificing speed or pragmatism. AI isn't a nice-to-have here — it's central to how we work. We expect our engineers to be active practitioners of AI-first development: fluent with the latest agentic coding tools, curious about what's emerging, and constantly pushing the boundary of what's possible with AI in their day-to-day craft. If you're the kind of engineer who's already experimenting with new models and tooling before anyone asks you to, you'll feel at home here.

As a senior engineer at Postscript, you’ll no longer be only writing code but orchestrating it.

This position is fully remote and can be based in the US or Canada.

## What You'll Do

- Take deep ownership of systems and product areas on your team, and become the go-to technical expert for what you own
- Independently investigate, design, and execute solutions across distributed systems with a high degree of ambiguity
- Architect, build, and maintain highly available, scalable REST APIs and backend services for internal and external use
- Drive system decoupling, modularization, and technical debt reduction.. Improve long-term maintainability without blocking near-term delivery
- Build agentically as your default: leveraging concurrent autonomous agent workflows, owning the output, and keeping a steady queue of aligned work moving
- Stay at the forefront of emerging AI tooling and practices, bringing new techniques back to the team and helping raise the floor for how Postscript engineers work
- Contribute to how we think about integrating AI into our systems and workflows. That means not just using AI tools, but helping shape where and how AI creates leverage across the engineering org
- Collaborate cross-functionally with product, data, and go-to-market teams by communicating clearly and proactively in an async-first environment
- Identify and eliminate single points of failure, improving system resilience and knowledge redundancy across your team
- Improve how engineering gets done: bring better tools, fix workflow friction, build internal utilities when the leverage compounds

## What We're Looking For

- 6+ years of experience building large-scale data-intensive backend systems and APIs
- You are an active, daily user of AI coding tools and are using them to maximize your output — Claude Code, Codex, Cursor, Copilot, or equivalent — and can speak concretely to how they've changed your output and your workflow
- Some or all of these languages: Python, Go, Rust, React, and TypeScript
- You follow the AI tooling landscape closely: new model releases, emerging agentic workflows, and evolving best practices aren't things you catch up on eventually.
- You think critically about AI output and you know where it accelerates you, where it introduces risk, and how to verify what it produces
- You are able to context switch quickly across concurrent workstreams
- Experience working on both 0-to-1 initiatives and complex existing systems, and knowing how to balance building new things with improving what's there
- You have working knowledge of event-driven distributed systems, Kafka, and familiarity with distributed data processing technologies (Flink/Spark/etc)
- Experience growing systems under production customer load, ideally from early days to the multi-terabyte stage
- Experience building and designing high-scale systems AWS with a broad variety of database technologies (RDBMS, OLAP, NoSQL, etc.)
- You know how to intelligently model relational data and design index strategies. You write performant SQL for transactional and analytical workloads
- Experience with infrastructure as code (eg, Terraform). You are comfortable evaluating and applying your infra changes.
- Familiarity building and observing applications on AWS & Kubernetes, ideally with Datadog, Signoz, or comparable observability tooling
- Clear, direct communication. Cross-functional partners and async teams can count on you to surface information proactively
- Strong instincts for technical tradeoffs informed by both engineering best practices and business priorities

## What You'll Love About Us

- Salary range of USD $175,000–$220,000 base plus significant equity (we do not have geo-based salaries)
- High growth startup — plenty of room for you to directly impact the company and grow your career
- Work from home (or wherever in US / Canada)
- Fun — we're passionate and enjoy what we do
- Competitive compensation and opportunity for equity
- Flexible paid time off
- Health, dental, vision insurance

For information about how we use your personal data, please see our U.S. Job Applicant [Privacy Notice](https://postscript.io/job-applicant-privacy-notice)

You are welcome here. Postscript is an ever-evolving place of equal employment for talented individuals.

## About Postscript

## Company Overview
- **One-liner**: Postscript is a best-in-class SMS marketing and sales platform purpose-built for Shopify ecommerce brands, helping them turn SMS into their top revenue channel.
- **Entity Type**: Private (Series C)
- **Headquarters**: Scottsdale, Arizona, United States (fully remote company)
- **Founded**: 2018
- **Founders**: Colin Turner (Co-Founder, CSO) and others

## Core Business
- **Primary industry**: SMS Marketing & Sales (Software Development, Ecommerce Technology)
- **Target customers**: B2B; ecommerce brands (SMB to mid-market) operating on Shopify
- **Mission or purpose**: To redefine how ecommerce brands grow by turning SMS into their most powerful revenue channel, while obsessively delivering value to customers.

## Products & Services
- **[Postscript SMS Platform]**: A comprehensive SaaS platform for SMS marketing and sales, including list growth tools (Popup Editor, CashBack, Onsite Opt-In), AI-powered message optimization (Infinity Testing), conversational AI for 1:1 shopping assistance, and best-in-class compliance management. The platform drives an average 34x ROI for merchants.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Annual Revenue of $60.0M (as of latest data); Total Funding of $106.3M
- **Notable Investors/Partners**: Backed by Y Combinator, Accomplice, Greylock, and 01 Advisors (led Series C). Notable angel investors include Mathilde Collin, Kevin Hale, and Paul English.
- **Growth Signals**: Acquired Fondue in 2023; consistently named to Forbes’ America’s Best Startup Employers List; headcount of 223 employees across 10 countries; active job postings up +42.9% year-over-year.

## Competitive Advantages
- **Sole Focus on SMS**: Unlike all-in-one marketing platforms, Postscript is singularly focused on SMS, giving them deep expertise and a product that outperforms generalist competitors.
- **Best-in-Class Compliance**: An in-house legal team and deep compliance expertise protect merchants from costly lawsuits, a critical differentiator in the regulated SMS space.
- **AI-Powered Optimization**: Features like Infinity Testing and conversational AI drive higher conversion rates and ROI (average 34x), making the platform highly effective.
- **Deep Shopify Integration**: Built exclusively for Shopify, ensuring seamless integration and optimized performance for the largest ecommerce ecosystem.

## Strategic Focus
- **AI & Automation**: Continuing to invest in AI to automate and optimize SMS campaigns, list growth, and customer conversations.
- **Compliance Leadership**: Maintaining and extending their position as the gold standard in SMS compliance, including policy advocacy through the Ecommerce Innovation Alliance.
- **Platform Expansion**: Growing the platform’s capabilities, likely through acquisitions (e.g., Fondue) and internal development to deepen their value for merchants.

## Why Work Here
- **Culture & Values**: A highly entrepreneurial, values-driven culture built on the FEACH framework: Fearless, Eighty/Twenty, Animal, Customer First, and Humility. The company emphasizes transparency, trust, and direct feedback.
- **Remote-First**: Fully remote since 2018, with a cameras-on culture and team offsites three times per year. Employees work from anywhere in North America.
- **Benefits**: 100% employee-paid medical, dental, and vision insurance; flexible PTO; generous parental leave; 401k; brand new Mac computer; wellbeing marketplace with points for rewards; a 5-year window to purchase equity after 2 years of employment.
- **Growth & Learning**: A strong learning culture with an 80/20 approach to shipping and iterating. Employees are encouraged to take bold bets and grow.
- **Team & Reputation**: Consistently named to Forbes’ America’s Best Startup Employers List. The team includes a diverse mix of backgrounds, from Stanford PhDs to college dropouts.

## Sources
1. [postscript.io/about-us](https://postscript.io/about-us)
2. [postscript.io/careers](https://postscript.io/careers)
3. [postscript.io](https://postscript.io/)
4. [job-boards.greenhouse.io/postscript](http://job-boards.greenhouse.io/postscript)
5. [linkedin.com/company/postscriptio](https://www.linkedin.com/company/postscriptio)

## Other roles at Postscript

- [Head of Growth](https://feeny.ai/job/head-of-growth-postscript-remote-5jtv1y1d5t96)
- [Senior Software Engineer, Full Stack](https://feeny.ai/job/senior-software-engineer-full-stack-postscript-remote-qq8mwne904s3)