Senior Software Engineer - Platform Engineering

About the Team

In this role, you will

• Own the sale write path — the transactional core that records every sale in every store — including idempotency guarantees, race-condition elimination, split-payment correctness, and graceful degradation under database stress
• Drive payments reliability end to end: card terminal terminal integrations, processor routing, preauth recovery, retries and reconciliation when the processor or the network misbehaves
• Lead our observability program on Datadog — APM, RUM, and DBM with full log/trace correlation, structured logging with PII redaction, and the monitors and DORA metrics every team runs on
• Hunt performance across a busy Postgres fleet: read-replica strategy, query-plan and index work, N+1 elimination, and caching layers (ElastiCache) that hold up on the year's biggest sales days
• Establish architectural patterns for multi-location retailers, offline-resilient POS, and high-write transactional workloads — and drive their adoption across teams
• Multiply your output with AI agents: direct, review, and productionize agent-written code as a core part of your workflow

Your background looks something like this

• 5+ years building production software, with deep experience in TypeScript/Node full-stack systems
• Real depth in PostgreSQL: you read query plans for fun, know when an index helps and when it hurts, and have operated replicas under load
• Distributed-systems instincts — idempotency keys, transactional boundaries, race conditions, and retry semantics are second nature
• Experience owning observability for a production system (Datadog, or equivalent with OpenTelemetry)
• A bias for root cause over patch, and a track record of turning one-off incidents into eliminated bug classes
• Comfort operating with high ownership in a small team where your decisions become the standard

Even better

• Payments experience: EMV terminals, processors (Datacap or similar), preauth/capture flows, or PCI-adjacent systems
• Retail or POS domain experience, especially inventory, reconciliation, or multi-location operations
• Familiarity with our stack: Next.js, tRPC, Prisma, ElastiCache, Aurora/RDS/RDS Proxy, PostgreSQL / pgvector
• Experience directing AI coding agents (Claude Code, Cursor, Codex, Devin) and building the guardrails that make them safe at scale
• History of establishing technical standards or architectural principles adopted across teams
• Experience building LLM-powered product features (we run OCR/ CV, recommendation, and agent systems in production)

• Fully company-covered medical and dental benefits.
• 401(k)
• Catered Lunches and Dinners: Santé provides dinner each evening for employees who would like to eat and connect with the team. Lunch is provided on a weekly basis