About the role

Role Overview

As a Senior Software Engineer, you’ll help us architect and scale our platform from the ground up. In this role, you’ll play a pivotal role in designing and integrating ETLs, and driving effective monitoring and observability as you architect and operate core infrastructure and data systems at scale.

What You’ll Do

Design the system architecture for an AI-first marketing platform
Drive new ETL pipelines to handle customer event data at scale
Define industry standards for leveraging agentic AI to personalize marketing
Power the marketing decisions for large companies, processing billions of data points every day

Qualifications

3+ years of industry experience in backend/infra engineering
You have experience designing data pipelines and processing event streams at scale
Proficiency in SQL and understanding of database design
Experience in building platforms and 0-1 systems
You are a quick learner, and you thrive in a fast-paced, constantly evolving environment

Why Join JustAI

High ownership, high impact - your work defines how AI meets real customer workflows
Founding-stage startup backed by YC & Peak XV (Sequoia), and growing fast
Work with leadership from Twitter, Pinterest, and Goldman Sachs
Competitive salary and meaningful equity

About JustAI

The future of Marketing is 1-1 hyper-personalized messaging. However, marketers spent multiple cycles setting up an "octopus" on CRM journey builders to manually write content for each persona and segment. Further, A/B testing is sequential and takes weeks to show results.

We drift away from the old school A/B testing world to dynamic testing. Companies can test 100+ messaging variants within a month, let AI optimize traffic for winning variants, and walk away with insights without operational setup overhead for every A/B test. We put companies in a state of continuous "always-on" testing.