Senior Backend Engineer – TypeScript, Nest.js, AWS

• Design and build a greenfield multi-tenant policy gateway as a Nest.js/TypeScript service on the client's internal framework and AWS
• Propose infrastructure changes as Terraform PRs for the client's DevOps team to apply
• Implement webhook contracts with HMAC authentication, Vault-managed secrets, IP allowlisting, ISO-8601 date handling, and policy-version-at-date-of-loss selection
• Build the tenant router and registry with composite resolution and defined failure behavior
• Build source adapters with per-source authentication, timeouts, retries with backoff, and circuit breaking
• Build tenant-specific SFTP landing zones, file validation and quarantine, and idempotent PostgreSQL policy-store loads with snapshot retention and freshness monitoring
• Define the canonical policy model and shared canonical-to-target mapper
• Lead the first partner's field-mapping review with the client's claims expert
• Deliver per-tenant observability, including structured logs, metrics, Grafana dashboards, freshness alerts, and error-rate alerts
• Create an onboarding runbook for adding additional tenants
• Write isolation negative tests as a release gate
• Run failure-mode drills and end-to-end walkthroughs in the client's sandbox
• Support the client's security review and launch readiness
• Collaborate directly with client engineers and domain experts across time zones, largely asynchronously

• 5+ years of backend engineering experience with strong, recent TypeScript in production
• Experience with Nest.js or a comparable dependency-injection-based Node framework
• Experience building integration services or API gateways, including webhooks, signature-based authentication, retries, idempotency, circuit breakers, and third-party API adapters
• PostgreSQL and relational data modelling experience; comfortable designing schemas and writing migrations
• Experience with multi-tenant systems or another domain where data isolation is a hard requirement
• Hands-on AWS experience with ECS/EKS or Lambda, SQS, S3, IAM, Secrets Manager or Vault
• Ability to read and propose Terraform, even if another person applies it
• AI-native way of working using tools such as Claude Code and Codex while reviewing every shipped line
• Ability to scope ambiguous requests, write concise design notes, ask clients the right questions early, and deliver without heavy oversight
• Fluent English and clear, proactive communication with technical and non-technical stakeholders
• Some availability in PT timezone, not more than once a week
• Insurance domain exposure, batch or file-based integrations, regulated-data experience, Grafana/OpenTelemetry-style observability, and prior consulting or client-facing delivery are nice to have

• Fully paid licenses for Cursor, Claude Pro, etc.
• Remote-first work arrangement
• No filler meetings, no Jira bloat, and no micromanagement
• Total autonomy over the workflow
• Direct work with the CEO, CTO, VPs, and client leadership
• Continuous growth and a strong knowledge-sharing culture