[Remote] Staff Product Engineer

Note: The job is a remote job and is open to candidates in USA. Kastel Group is a venture-backed AI infrastructure company focused on revolutionizing accounting operations at scale. They are seeking a Staff Product Engineer with deep NetSuite expertise to lead and expand a critical ERP integration layer, where the engineer will own the NetSuite ecosystem end-to-end, including architecture and customer-specific customizations.ResponsibilitiesArchitect and build deep NetSuite integrations across enterprise customer environmentsDevelop and maintain reliable sync logic, reconciliation workflows, and data mappingsWork directly with SuiteTalk APIs (REST/SOAP), SuiteQL, and SuiteScriptHandle customer onboarding workflows including authentication, permissions, and troubleshootingDesign systems capable of supporting highly customized NetSuite tenantsCollaborate cross-functionally with engineering, product, and customer stakeholdersEstablish best practices around observability, reliability, and integration architectureContribute across the stack where needed, including backend systems, infrastructure, and product functionalitySkills5–10+ years of software engineering experienceStrong hands-on NetSuite integration expertiseDeep understanding of NetSuite data structures and OneWorld environmentsExperience with SuiteTalk REST/SOAP APIs, SuiteQL, and SuiteScript 2.xComfortable working with customized ERP environments including workflows, saved searches, custom records, and custom fieldsStrong backend engineering fundamentals, particularly with PythonExperience building scalable systems and production-grade infrastructureFamiliarity with Kubernetes and modern cloud-native environmentsPrior startup or founding engineer experienceFinancial systems or accounting domain experienceBenefitsMeaningful equity packageHybrid preference in London, though remote candidates in the US, UK, or EU will be consideredVisa sponsorship currently unavailableCompany OverviewWe partner with motivated and engaged clients to bring them sustainable talent to their teams. It was founded in 2021, and is headquartered in Mesa, Arizona, USA, with a workforce of 11-50 employees. Its website is https://kastelstaffing.com.