Software Engineer, Full Stack (Senior, Staff+)

About the role

Kustomer is hiring a Full Stack Software Engineer to join our Engineering team. In this role, you'll work as part of a Pod: a 3–5 person team that picks up a high-priority initiative, ramps quickly, ships end-to-end, and moves on to the next one. You'll be a capable, adaptable engineer who can walk into any part of the codebase, understand it, and make it better. You'll ship new capabilities, improve performance, and contribute to the evolution of our architecture using technologies like Node.js, React, Golang, and AWS, collaborating closely with your squad leader and teammates across engineering, product, and design.

AI is a core part of how we build. You'll use AI tools daily to move faster and raise the bar on what you ship. You'll also help build AI-powered product capabilities that meaningfully improve the customer experience. We're looking for engineers with strong technical judgment, a high bar for craft, and real curiosity about how systems, product, and AI intersect. You take initiative, thrive in ambiguous problem spaces, and own your work end to end, from design through production. Not because someone's tracking it, but because you genuinely care about what you're building.

What You’ll Do

• Ship full-stack features end-to-end as a member of a Pod, owning scope from problem definition through production, using technologies like Node.js, React, Golang, MongoDB, ElasticSearch, and AWS
• Develop APIs and integrate with external services and databases, ensuring data integrity and security
• Build front-end interfaces with a focus on user experience, responsiveness, and accessibility
• Design and implement AI-powered features where they enhance end-user experience or improve platform efficiency
• Contribute to scope and tradeoff decisions alongside your Pod Lead; own what's in scope, escalate what isn't, and communicate progress proactively
• Optimize application performance through caching, efficient algorithms, and database indexing
• Write thorough unit and integration tests to ensure quality and reliability
• Conduct code reviews, provide constructive feedback, and mentor junior engineers to uphold a high quality bar
• Share production support responsibility on a rotating basis, including on-call and bug triage, distributed equitably across the team
• Ramp quickly on unfamiliar parts of the codebase aided by AI tooling, consistent code hygiene, and a deep engineering foundation

Your qualifications

• 7+ years of progressive software development experience and a Bachelor's degree in Computer Science, Software Engineering, or a related field
• You're comfortable working across frontend and backend. You may have a stronger side, and that's fine.