Full Stack Product Engineer

santehq.com•New York, NY

7d•Onsite

About The Position

Santé is building an AI operating system for local retailers, bringing point of sale, integrated payments, eCommerce, inventory, delivery integrations, marketing, bookkeeping, and AI agents into one platform. The Platform Engineering team owns POS and checkout, architecture, and observability, building foundations used by Money Movement, Merchant Experience, and Applied AI. The role is based in the Flatiron area of New York City and is in office, full time. The core stack is TypeScript, React, Next.js, tRPC, Prisma, and PostgreSQL. The engineer will own features from product decisions through production, shaping both the merchant-facing product and technical foundations used by other engineers. They will identify problems with merchants and teammates, make product and technical tradeoffs, and improve shipped work based on its performance in real stores. The team ships daily, uses AI coding agents throughout development, and works together in person. Compensation is $220,000–$280,000 base salary plus meaningful equity, with compensation within the range depending on experience, skills, and scope of responsibility. Benefits include fully company-covered medical and dental benefits, a 401(k), weekly catered lunch, and dinner provided each evening for employees who would like to eat with the team.

Requirements

A record of owning substantial full-stack products in production and explaining the decisions, tradeoffs, and user improvements.
Strong programming fundamentals and depth in modern frontend development, including interaction details, state management, accessibility, and performance.
Depth in backend design and relational databases, especially PostgreSQL, including API boundaries, data modeling, transactions, query plans, and indexes.
Practical understanding of distributed systems, including concurrency, idempotency, retries, and partial failure.
Experience diagnosing production problems with logs, traces, and metrics and fixing underlying causes.
Product judgment to turn ambiguous merchant problems into focused solutions and recognize when a simpler design is preferable.
Autonomy to take an open-ended problem from first principles to a working product.
Communication skills to bring teammates along.

Nice To Haves

Payments or retail experience, including card terminals, preauthorization and capture, multi-location operations, or offline-resilient POS.
Experience with Santé’s core stack, or operating Aurora/RDS, ElastiCache, and production observability tools such as Datadog and OpenTelemetry.
Experience establishing shared architecture or developer tools adopted across teams.
Experience building LLM-powered products or improving how teams use AI coding agents.

Responsibilities

Design and ship full-stack features, from intuitive React interfaces to reliable APIs and data models.
Own projects from problem definition and technical design through testing, launch, and iteration, working closely with Product and store owners.
Strengthen checkout and payments so sales remain correct and recoverable through concurrent writes, network failures, and retries.
Build shared components, internal tools, and development workflows that improve the effectiveness of the engineering team.
Operate shipped products by tracing slow interactions from the browser to PostgreSQL, improving observability, and eliminating recurring causes of production incidents.
Direct AI coding agents in daily work, reviewing their output and validating behavior before it reaches merchants.
Raise engineering standards through thoughtful design reviews, clear code, and mentoring.