[Remote] Software Engineer, Full Stack (Senior, Staff+)

Note: The job is a remote job and is open to candidates in USA. Kustomer is an industry leading conversational CRM platform focused on enhancing customer experience through AI and automation. They are hiring a Senior Full Stack Software Engineer to work within a small team to develop and ship full-stack features, improve performance, and contribute to the platform's architecture.ResponsibilitiesShip 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 AWSDevelop APIs and integrate with external services and databases, ensuring data integrity and securityBuild front-end interfaces with a focus on user experience, responsiveness, and accessibilityDesign and implement AI-powered features where they enhance end-user experience or improve platform efficiencyContribute to scope and tradeoff decisions alongside your Pod Lead; own what's in scope, escalate what isn't, and communicate progress proactivelyOptimize application performance through caching, efficient algorithms, and database indexingWrite thorough unit and integration tests to ensure quality and reliabilityConduct code reviews, provide constructive feedback, and mentor junior engineers to uphold a high quality barShare production support responsibility on a rotating basis, including on-call and bug triage, distributed equitably across the teamStay current with emerging AI tools, full-stack technologies, and industry trends — and actively propose and champion those that improve team velocity, quality, and development practicesRamp quickly on unfamiliar parts of the codebase aided by AI tooling, consistent code hygiene, and a deep engineering foundationSkills7+ years of progressive software development experience and a Bachelor's degree in Computer Science, Software Engineering, or a related fieldYou're comfortable working across frontend and backend. You may have a stronger side, and that's fine. What matters is that you can follow the work wherever it goes and aren't blocked by an unfamiliar layerYou understand how systems work at depth and have experience with cloud platforms like AWS or similar. Data structures, algorithms, concurrency, distributed systems, API design, database internals; these are tools, not triviaYou don't need to be the domain expert before contributing. You read READMEs, trace execution, ask sharp questions, and start adding value fastYou own the outcome, not just the ticket. You raise risks early, communicate progress proactively, and care about what ships, not just what you committedYou're able to diagnose and debug complex issues, optimize application performance, and identify areas for improvementYou have hands-on experience with modern AI developer tools, such as GitHub Copilot, Cursor, or Claude Code, and have built a real working practice around using them as a force multiplier for code comprehension, test scaffolding, documentation, debugging, and rampFamiliarity with integrating AI or ML-powered capabilities into web applications, even at a prototype or feature levelExposure to integrating third-party AI APIs or frameworks (e.g., OpenAI, Anthropic, LangChain, or vector databases like Pinecone)Interest in exploring how AI can enhance developer workflows and improve product functionalityGithub activity showing thoughtful, relevant contributionsBenefitsCompetitive salaries and stock options100% healthcare coverage401KWiFi and Mobile reimbursementGenerous vacation policyPensionSupplemental health insuranceOther perksCompany OverviewKustomer is an omnichannel Software-as-a-Service (SaaS) CRM platform specializing in customer service. It is a sub-organization of Meta. It was founded in 2015, and is headquartered in Short Hills, New Jersey, USA, with a workforce of 201-500 employees. Its website is https://www.kustomer.com.Company H1B SponsorshipKustomer has a track record of offering H1B sponsorships, with 5 in 2025, 5 in 2024, 3 in 2023, 3 in 2022, 5 in 2021, 2 in 2020. Please note that this does not guarantee sponsorship for this specific role.