156. Senior Full Stack Developer (Python / React) We’re looking for a Senior Full Stack Developer (Python - React) to join Source Meridian. About Source Meridian Source Meridian is a development software company that works to solve the industry’s most challenging problems in healthcare practices. We are laser focused on specific technologies in the healthcare and life science industries: Healthcare technology, artificial intelligence, and healthcare interoperability. About the Role You are the builder. You work directly alongside the domain experts, co-write the most critical and risk-sensitive modules, build the test infrastructure, and handle the complex backend work that requires deep engineering skill — not just domain knowledge and an AI prompt. You also serve as the second PR reviewer, taking load off the Tech Lead for lower-risk PRs so the review queue doesn't become a bottleneck. What You’ll Do Co-build the platform scaffold: PostgreSQL schema (core entities, tenant-scoped tables, RLS policies), FastAPI project structure, Entra ID auth integration, Azure Service Bus queue setup. Implement the TenantScopedModel base class and write the first RLS test battery. Load and validate the CMS MPFS fee schedule (ETL pipeline from CMS fixed-width files into PostgreSQL). Set up the local development environment (Docker Compose: PostgreSQL, Redis, Service Bus emulator) and document it. Repricing engine. Write the Medicare RVU calculation core (hlh-repricing-core package). This is the single most sensitive component in the platform — pure deterministic function, zero external dependencies, unit tests for each of the five calculation steps independently. This is not AI-generated. You write this by hand. Tenant isolation layer: Implement and test the dual-control pattern (application-layer TenantScopedModel + PostgreSQL RLS with set_config on connection checkout/checkin). Write the cross-tenant test battery that runs in CI on every PR. State machine transitions: Implement the custom state machine (14 states, WorkflowTask table, SLA polling job). Service Bus workers: Build the worker infrastructure (OCR jobs, packet generation, sync adapters). Ensure idempotency, dead‑letter handling, and forward‑compatible message schemas for rolling deployments. PHI automated controls: Implement the CI/CD PHI pattern scanner, the runtime outbound payload filter for LLM API calls, and the continuous log monitoring queries. Review PRs that the Tech Lead delegates: UI components, Service Bus worker handlers, non‑financial data pipeline code, Dynamics sync adapters. You review for: module boundary compliance, idempotency, error handling, and test coverage. The Tech Lead retains final authority on financial logic and tenant isolation PRs. Required Qualifications Python 3.12+ / FastAPI PostgreSQL — advanced. RLS policies, SQLAlchemy 2.0 async, Alembic migrations, JSONB with GIN indexing, connection pool lifecycle management. Azure Service Bus — message handling, dead‑letter queues, retry with exponential backoff, idempotent consumer patterns. Azure — Container Apps, Blob Storage (pre‑signed URLs, lifecycle policies), Key Vault, Application Insights structured logging. React — solid working knowledge. AI‑assisted code review. Nice to Have Healthcare domain experience or HIPAA‑regulated environment experience. Anthropic Claude API integration (structured JSON extraction, prompt engineering for schema‑conformant output). Experience with financial calculation engines (fee schedules, pricing models, audit trail requirements). Soft Skills Proven client‑facing experience . Strategic mindset with a solution‑oriented approach and strong decision‑making skills. What We Offer ✔ Permanent contract ✔ Learning and continuous growth environment ✔ Benefits package focused on health and well‑being ✔ Competitive salary based on experience Apply only if you reside in Colombia or Ecuador #J-18808-Ljbffr