Senior Full Stack Engineer (NYC)
1 month ago
New York
Job Description Who weâre looking for⌠Role: Senior Full Stack Engineer Team: Engineering Reports To: Head of Engineering Location: Knitâs NYC office (Hybrid) Operating hours: Monday - Friday 9am - 5pm EST. Travel: This role will occasionally be expected to travel for in-person internal working sessions, and our once per year US All Team Summit. [To be less than 15%] A little about us⌠Knit is building the agentic AI platform that helps enterprise brands run endâtoâend consumer research. We orchestrate specialized AI agents for surveys, data collection, analysis, and reporting, delivering decision-grade insights to Fortune 1000 brands in hours, not weeks. In under two years, weâve partnered with 50+ leading enterprise brands, including Amazon, Mars, NASCAR, JBL, ESPN, and Paramount. Knit has grown 500% in the last 12 months and raised $30.6M to date, including a $16.1M Series A in July 2025. Here are example case studies that demonstrate the value of our platform. A product demo can be found here. Overview Weâre building our foundational NYC engineering team from scratch and looking for exceptional builders who are resourceful, deeply technical, and thrive in high-ownership environments. As one of the first in-house engineers, youâll shape the core of our platform and the culture of a team that will scale to 20+ over the next 18 months. Youâll build and orchestrate AI agents, pioneer new UX paradigms, and tackle some of the hardest problems in applied AI with autonomy and end-to-end ownership. Business Impact | What you will own⌠⢠Own 0â1 and 1âN features across the stack, from design docs to building high-throughput data pipelines and scalable FastAPI services., ⢠Architect and own the core agent orchestration engine, designing complex, multiâagent LLM workflows (routing, toolâuse, memory, evaluation) with deterministic fallbacks, guardrails, and auditable actions required by enterprise users., ⢠Build AIânative, humanâinâtheâloop UIs. Craft React/Next.js interfaces that let users collaborate safely with agents, with transparency and explainability by design., ⢠Develop the "factory for the factory". Build our experimentation platform: CI/CD for prompts and agents, offline/online evals, drift detection, safety layers, and rollout controls., ⢠Ship fast, safely. Youâll instrument everything for reliability, write concise design docs, add robust tests, and build dashboards and alerts for features you launch., ⢠Partner crossâfunctionally with Product, AI, Design, CS; talk to customers and SMEs, and turn ambiguous problems into shipped product., ⢠Obsess over performance, optimizing for latency across the system: caching, model selection, distillation, batching, vector search, and infrastructure efficiency (GPU/CPU)., ⢠Operate what you build. This includes onâcall ownership, leading incident response, and driving learning through blameless postmortems.Our Stack, ⢠Frontend: React, Next.js, ⢠Backend: Python, FastAPI, ⢠Data/ML: MongoDB, S3, Redis; Pinecone, ⢠Infra: AWS, Docker, Kubernetes; CI/CD with GitHub Actions., ⢠Messaging: SQS; eventâdriven pipelines.This role is for you if..., ⢠Youâre a 0 â 1 builder who thrives in ambiguity and has shipped products from scratch at a startup or in a hyper-growth phase. You've seen both - early-stage hustle and later-stage scale and know how to build for it., ⢠Youâre a systems thinker with deep technical chops: you design clear architectures and write clean, tested Python and TypeScript., ⢠You think like an owner: you spot problems, propose solutions, and build them without waiting for perfect specs. Your impact is measured in business outcomes., ⢠You use AI as leverage. Tools like Cursor, Copilot, or Claude Code are integral to your workflow, helping you ship faster while maintaining a high standard for correctness., ⢠You believe speed and quality arenât opposites and can articulate the tradeoffs you make., ⢠You communicate crisply. You share your ideas effectively and thrive in tight feedback loops with product, design, and customers., ⢠Youâve got grit: hard problems energize you, context switching doesnât scare you, and youâre comfortable deleting code.This role is NOT for you if..., ⢠You see a hard line between "frontend," "backend," and "product.", ⢠You are uncomfortable with ambiguity, rapid context-switching, and dynamic priorities., ⢠Experience with LLM/agent systems, evals, and prompt tooling; RAG, embeddings, vector dbs., ⢠Deep knowledge of eventâdriven systems, streaming, and workflow engines., ⢠Expertise in observability (OpenTelemetry/Prometheus/Datadog), feature flagging, or A/B platforms., ⢠Background in enterprise security and compliance (SOC 2, GDPR), ⢠Bias to action: short specs, small PRs, daily deploys., ⢠In-person collaboration: weâre building the NYC hub together; whiteboards > long threads. Upon joining the Knit team in this foundational role, you will receive a competitive salary, Equity Options, Healthcare (medical, dental, and vision), and Additional Coverage, a company laptop and one-time, onboarding Technology Stipend, a 401(k) with company match, flexible time-off, hybrid working, and more! Salary In accordance with New York pay transparency requirements, the expected base salary range for this role is $200,000â$275,000 annually; final compensation will be determined based on the candidateâs level, experience, and qualifications upon joining Knit. Powered by JazzHR aYoi81irtu