Product Engineer (Full-stack)

You own the surface where clients actually meet Sparengine: the upload and analysis flow, the deliverable views (component status, event trace, work package completeness), and the front-to-back integration with the pipeline. Next.js, clean state handling, real loading and progress states, and an instinct for trust-building UX. You ship fast, you QA on a real case before calling something done, and you confirm in one line what you tested.