About the role

Role Overview

We’re looking for a Full Stack Software Engineer to design, implement, and QA large customer features, end-to-end. In this role, you’ll work with product and design teams to scope emergent customer needs and design and implement solutions across our entire stack.

What You’ll Do

Take responsibility for projects from initial scoping to production, breaking large, ambiguous problems into clear milestones with measurable outcomes
Own quality and outcomes across the full lifecycle, including testing, launch, and rollout
Partner closely with product and design, scoping and evaluating tradeoffs between technical feasibility and product experience

Qualifications

2+ years of industry experience in full-stack engineering, with strong backend skills
Experience in building platforms end-to-end, with a focus on product requirements
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.