Senior TypeScript Functional Backend Engineer (Integrations) LATAM

**Description** We are hiring a Senior Functional Backend Engineer to help us connect to insurance portals across the U.S. to ingest, transform, and deliver structured healthcare data — including claims, EOBs, plan documents, and accumulators. This role sits at the intersection of production reliability and system design. You’ll own integration health in production, onboard new portals, expand data coverage, and write clean, strongly typed backend code. The team values functional principles \- composability, explicit error handling, type safety \- and uses Effect extensively, but prior Effect experience is not required. This is hands\-on engineering in a system where correctness and clarity matter. **English** fluency is a MUST for this role! Only candidates with level **C1** or **C2** will be considered: A1 Beginner A2 Elementary B1 Intermediate B2 Upper\-Intermediate **C1 Advanced** **C2 Proficient** **Responsibilities** Production Triage \& Reliability * Own first\-response triage for portal integration failures * Debug login automation issues, crawl failures, and ingestion errors * Trace failures across logs, workflows, and monitoring systems * Implement clean, durable fixes \- not just patches * Escalate systemic platform issues when appropriate Portal Onboarding * Bring new insurance portals into production * Reverse\-engineer APIs and browser workflows * Build ingestion pipelines and validate structured outputs * Ensure integrations remain resilient as portals evolve Data Expansion * Extend existing integrations to capture new data types * Maintain strong typing and predictable transformations * Guard against schema drift and data inconsistencies Collaboration * Contribute to runbooks and documentation * Participate in async standups and structured handoffs * Work closely with a platform\-focused engineering team **Requirements** * **4\+ years of Strongly Typed Backend Experience** * Deep experience in strongly typed languages ( **TypeScript** , Scala, Kotlin, Go, etc.) * Careful **API** modeling and schema validation * Comfort designing systems where types act as contracts * **Functional or Declarative Programming Experience** * You don’t need to come from a pure Functional Programming background, but you should be comfortable with immutability, explicit handling, declarative composition, and writing predictable, testable code. * **TypeScript (Backend)** * Experience building backend services * **NestJS** experience preferred **Nice To Have** * **Experience with Effect (TypeScript Library)** * If not, you should be comfortable learning it and working within a composable, typed effect system * Playwright or browser automation * API reverse\-engineering via browser devtools * Workflow orchestration (Temporal or similar) * Data ingestion or transformation pipelines * Observability tooling (Datadog or similar) * **AWS** experience