Founding Engineer - Fullstack, Proficiency in TypeScript and Node.js

Take customer-facing features from concept to production. Talk to users, design the solution, build it, and watch them use it Design secure, auditable data models and event-driven pipelines that power AI agent workflows Develop internal and external APIs and a real-time operator console that gives customers full visibility into their operations Build first-party integrations with ERPs, 3PLs, retailers, and freight partners, and a resilient sync layer that keeps everything in lockstep Establish observability, SLOs, and on-call practices for mission-critical workflows where downtime means missed shipments and chargebacks Work across the full stack, backend, data engineering, and frontend, wherever the highest-leverage problem lives, As a Fullstack Engineer, you will play a crucial role in shaping the future of AI systems by developing high-quality, real-world input that enhances how models learn, reason, and p…

• 1 month ago

Technical 2 to 5 years of software engineering experience, ideally including time at a high-agency startup where you owned product work end-to-end Strong proficiency in TypeScript and Node.js, the core stack at Jampack Postgres for data modeling and query performance Full-stack capability, including React for customer-facing product surfaces Comfortable with event-driven pattern, webhooks, async workflows, integrations that keep external systems in sync Execution and Ownership Takes a customer problem or vague feature idea and runs it to production without waiting for specs Researches the right approach before building, and chooses the simplest thing that will actually work Cares about reliability - this is mission-critical infrastructure where downtime means missed shipments for real brands Hungry, committed, and “all-in” on an early-stage startup pace. Not 9-to-5, not 996 - reachable when things break, and honest about what that requires Communication Clear, direct communicator who can talk to non-technical customers when needed and translate their workflows into software Low ego, collaborative, works directly with the two co-founders every day Location Hybrid in Brooklyn, NY (WeWork). Strong preference for in-person most of the week Nice-to-Have Prior experience as a founding engineer or early hire at a seed/Series A startup Background in logistics, supply chain, freight, CPG, or B2B SaaS - anything that touches the messy real-world systems Jampack integrates with EDI experience (SPS Commerce, TrueCommerce, or similar) - Jampack is expanding into EDI and this is a real edge Experience at Flexport or a comparable logistics-adjacent company Familiarity with Supabase, Next.js, or other modern BaaS stacks Hands-on work with AI agents, LLM tooling, or agentic workflows in production