What are the responsibilities and job description for the Founding Full Stack Engineer position at Jack?
A fast-growing stealth startup is building an AI-native platform transforming how consumer brands manage complex operational workflows. Focused on modernizing outdated systems within a massive and underserved industry, the company is creating intelligent infrastructure that automates critical business operations from end to end. Backed by top-tier investors and led by experienced founders with deep operational and technical expertise, the team is tackling real-world challenges at scale with AI-powered workflows, seamless integrations, and mission-critical reliability. The company operates with a high-ownership, high-impact culture where engineers work closely with customers and directly influence the product from day one.
Responsibilities
- Build and ship full-stack product features from concept through production
- Design scalable backend systems, APIs, and event-driven workflows
- Develop customer-facing applications and internal operational tools
- Create and maintain integrations with third-party platforms and external systems
- Improve platform reliability, observability, and system performance
- Collaborate directly with customers to understand workflows and solve operational challenges
- Work across frontend, backend, and infrastructure depending on business priorities
- Help shape engineering culture, architecture decisions, and product direction in an early-stage environment
Qualifications
- 2–5 years of software engineering experience, preferably in startup environments
- Strong experience with TypeScript and Node.js
- Full-stack development experience, including modern frontend frameworks such as React
- Experience working with APIs, asynchronous systems, webhooks, and integrations
- Strong understanding of database design and query optimization
- Ability to take ownership of projects and execute independently
- Comfortable operating in fast-paced, ambiguous startup environments
- Excellent communication and collaboration skills
- Passion for building reliable, customer-centric software products
Benefits
- Competitive salary ($160,000 - $220,000) and equity package
- Health insurance coverage
- Opportunity to work directly with experienced founders and industry leaders
- High ownership and direct impact on company growth
- Collaborative, fast-moving startup environment
- Hybrid work environment with strong in-person collaboration opportunities in New York City
Salary : $160,000 - $220,000