Senior Full Stack Developer (Python / React)

Description

Summary: Source Meridian is seeking a Senior Full Stack Developer (Python-React) to build critical healthcare technology modules and infrastructure, working directly with domain experts. Highlights: 1. Co-write critical and risk-sensitive modules alongside domain experts 2. Handle complex backend work requiring deep engineering skill 3. Contribute to high-impact tech-health products making a difference **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. * Test\-driven development * Azure — Container Apps, Blob Storage (pre\-signed URLs, lifecycle policies), Key Vault, Application Insights structured logging. * React — solid working knowledge. * AI\-assisted code review. * CI/CD pipeline engineering — Azure DevOps Pipelines. * English B2\+ \- C1 **Nice to Have** ---------------- * Healthcare domain experience or HIPAA\-regulated environment experience. * Anthropic Claude API integration (structured JSON extraction, prompt engineering for schema\-conformant output). * Azure Form Recognizer / Document Intelligence experience. * Experience with financial calculation engines (fee schedules, pricing models, audit trail requirements). **Soft Skills.** ---------------- * Proven **client\-facing experience**. * Excellent **communication skills**. * Strong **expectation management** abilities. * 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** At **Source Meridian**, you’ll be part of a high\-impact **tech\-health** company, building products that truly make a difference. If you meet the profile — or know someone who might be interested — **apply now!** We’d love to meet you