Full Stack Engineer

Berkley Hunt is partnering with a well-funded, revenue-generating startup that has scaled from $0 to a multi-eight-figure run rate in months, building a product layer that turns fragmented, failure-prone enterprise work into software people can trust. They're hiring a Full-Stack Engineer (amongst other positions) to own hard customer and internal-team problems end-to-end, from the first product decision through reliable production systems, working across UX, frontend, backend, data, testing, and observability rather than a single layer of the stack. This is an onsite role based in New York. What You'll Do Own ambiguous customer or internal-team problems from discovery through measurable production outcomes Build coherent vertical slices across frontend, backend, workflow state, data, testing, observability, security, and release Make complicated processes clear without hiding exceptions, uncertainty, or recovery paths Diagnose difficult production behavior and remove recurring root causes Establish useful measurements and improve customer, team, quality, or reliability outcomes Create reusable product and engineering capabilities that make later work faster and safer Use AI deeply in development and where it improves the product, with explicit evaluation and verification Work directly with Product, Design, customers, domain experts, and other engineers What We're Looking For At least 3 years of professional software engineering experience A strong full-stack engineer with excellent product and UX judgment Startup experience, comfortable with broad ownership, changing context, and building without fully specified requirements A track record of owning ambiguous problems from discovery through implementation, production operation, and iteration Able to reason carefully about state, data integrity, testing, security, observability, and recovery in complex workflows Uses evidence to debug systems and measure whether work actually improved the outcome Fluent with modern AI engineering tools, with the judgment to verify their output Clear communicator across technical and customer-facing teams Bonus: strong TypeScript, React, or Node.js experience; integration-heavy SaaS/API/OAuth/file-upload work; document workflows, internal tools, evaluation systems, or production diagnosis experience; experience building high-fidelity simulation/evaluation environments; multi-tenant or compliance-sensitive products; shipping trustworthy AI-assisted workflows Salary: $180,000 - $280,000 base, varying by seniority Berkley Hunt