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.

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