Full Stack Engineer (New York)

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