Senior Fullstack Engineer
- New York City, NY
- $170,000-220,000 per year
- Permanent
- Full-time
Location: Brooklyn, NY (On-site, 5 days/week)
Type: Full-time
Compensation: $170,000 – $220,000 base + 0.1% – 0.9% equity
Visa: H-1B transfers available (no new sponsorship)About the RoleWe’re building the secure AI infrastructure layer for enterprise and government customers—and we’re looking for a Senior Fullstack Engineer to join our founding team in Brooklyn. You'll help scale a product that’s already driving 7-figure ARR with significant month-over-month growth , backed by a fresh $10M+ raise and clear market validation.As we move beyond MVP, this role is critical in designing and building a scalable, performant architecture while preserving our industry-leading security standards . You’ll work across the stack, contribute to product direction, and help shape the technical foundation of the company.What You’ll DoOwn and evolve core product systems across frontend and backendHelp transition from MVP to a robust, secure production-grade architectureCollaborate closely with product and leadership to define features, performance goals, and user experiencesMentor junior engineers and uphold a high bar for code quality and technical decision-makingWork across our modern AI stack, supporting real-world use cases for enterprise and government clientsRole ResponsibilitiesLLM & AI Platform Development : Improve our Retrieval-Augmented Generation (RAG) system by experimenting with foundational LLMs (OpenAI, Anthropic, Cohere, Gemini) and search techniques.Developer API Enhancements : Expand and refine our APIs for developer usability and enterprise integration—optimize performance, expand features, and simplify developer workflows.Frontend Product Engineering : Work on our React/Next.js frontend to deliver fast, intuitive, and visually consistent UI for our enterprise users.Data Platform Engineering : Scale and optimize our ingestion pipelines, embedding systems, and transformations to support generative AI across massive, customer-specific datasets.Tech StackFrontend: React, TypeScript, Next.js, TailwindBackend: TypeScript, Next.js, Gel/PostgreSQLAI/ML: OpenAI, Anthropic, Cohere, Gemini, Milvus, QDrant, MongoDBCloud & Infra: AWS, Terraform, Helm, KubernetesData Infrastructure: dbt, Airflow, Dagster, Snowflake (bonus)Experience:5–10 years of professional engineering experience, with recent roles in fullstack developmentPrior work at a fast-growing startup or highly regulated SaaS companyDemonstrated impact—e.g. took a product from 0 → 1 , or stayed through Seed → Series BExperience owning major projects end-to-end in high-growth, high-ownership environmentsBonus: Early-stage or founding team experienceEducation:Degree in Computer Science or related field, preferably from a top-tier universitySkills:Proficiency across React, TypeScript, Next.js , and PostgreSQLExperience working with AI/LLM platforms (e.g., OpenAI, Cohere, Anthropic)Familiarity with cloud-native infrastructure , Kubernetes, and IaC tools (Terraform, Helm)Ability to work in a security-conscious, highly regulated environment is a strong plusSalary Range: $170,000-$220,000 base.