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.