Mid-Level Full Stack Engineer - Asset Hub

Mid-Level Full Stack Engineer

Simple Closure is seeking a Mid-Level Full Stack Engineer to help build Asset Hub — our marketplace for the assets left behind when a company shuts down: codebases, work spaces, proprietary data, domains, and talent. Our buyers include some of the top foundation model labs, RL environment providers, and AI agent builders in the world, who rely on Asset Hub as a differentiated source of proprietary data they can't get anywhere else.

You'll work across the stack to build the tools and products that power asset selling and buying, and to replace manual internal processes with technology so the team can scale. You'll work in a small, dedicated Asset Hub pod with product and design support, shipping in short cycles and owning features end to end — balancing frontend craftsmanship with backend problem-solving in a fast-moving startup environment.

* Candidates MUST be located in the New York City Metro area.

• Design, build, and maintain full-stack features across Asset Hub — the buyer portal for browsing and licensing codebases and work spaces, domains, and the internal tools behind them.
• Implement clean, maintainable frontend experiences using Next.js, React, and Type Script.
• Write high quality, well-tested code and use AI tooling to move faster
• Build and integrate backend services, APIs, and data models to support asset selling and buying and to connect third-party and partner systems.
• Replace manual internal processes — asset intake, cataloging, pricing, deal tracking — with tooling that lets the team scale without adding headcount.
• Own features end to end, from technical design through deployment and iteration; debug, troubleshoot, and resolve issues in production.
• Work with sensitive material — codebases, workspace exports, and proprietary datasets — with strong attention to security, privacy, and PII handling.
• Collaborate effectively with Product, Design, and the GM of Asset Hub to translate ambiguous requirements into scalable technical solutions.

• Experience: 3–5 years of professional software engineering experience, ideally in a startup or fast-paced environment.
• Frontend: Strong experience with React and Type Script;
  Next.js or similar frameworks preferred.
• Backend: Experience building server-side logic and APIs and integrating with third-party services; proficiency in Python.
• Databases: Familiarity with relational and/or No
  
  SQL databases.
• Ownership: Comfortable taking projects from concept through deployment and iteration in an ambiguous, 0-to-1 environment.
• Problem-solving: Proactive, thoughtful engineer who can navigate ambiguity and make sound technical decisions.
• Collaboration & communication: Strong team player who enjoys working cross-functionally, with clear written and verbal communication.
• Adaptability: Thrives in an evolving startup environment with shifting priorities.
• AI-assisted development: Experience using AI dev tools (e.g., Copilot, Cursor, Claude Code) as part of your regular workflow.
• Nice to have: marketplace, B2B, or platform products; data-heavy products; experience working with codebases/repositories or large datasets.

• Base Salary: $120,000 - $170,000, depending on experience level
• Competitive equity package
• Comprehensive health benefits, including medical, dental, and vision
• Life insurance
• Unlimited paid time off
• Flexible hybrid work environment in New York City, Midtown (currently 2 days per week in office)
• Two company-wide offsites each year
• 401(k) with Traditional and Roth options, with immediate eligibility

We are committed to providing a work environment free of discrimination and harassment. All employment decisions at Simple Closure — including recruiting, hiring, promotion, compensation, and termination — are based on qualifications, merit, and business need, without regard to race, color, religion, sex (including pregnancy, childbirth, and related medical conditions), sexual orientation, gender identity or expression, national origin, age, disability, genetic information, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.

We're committed to building a diverse and inclusive team, and we welcome applicants from all backgrounds. If you need a reasonable accommodation during the application or interview process, please let us know.

Thanks for applying! If your experience is a strong match for what we're looking for, our hiring team will reach out to schedule an initial screening call and walk you through the rest of our interview process.

We do our best to respond to every applicant, but given the volume of applications we receive, we may not be able to provide individual updates if we decide not to move forward.