Senior Backend Engineer: APIs, Search & MCP (TS/Node)

Quantum Technologies. LLC; Florida; On-site; USD 140,000 - 190,000; Full time

Job summary

Quantum Technologies. LLC is seeking a hands‑on Senior Software Engineer to build secure backend services for content discovery, search, and MCP integrations. You’ll focus on scalable TypeScript/Node.js implementations, API design, and robust data access controls.

The role emphasizes production‑grade services, test coverage, observability, and containerized deployments. Collaboration with platform, product, and engineering teams will ensure dependable, scalable solutions for content platforms

Qualifications

• 8+ years of software engineering experience, with hands‑on backend development.
• Strong production proficiency in TypeScript and Node.js.
• Experience designing and maintaining REST APIs or similar service interfaces.
• Experience with authentication, scoped authorization, identity propagation, and permission‑aware data access.
• Experience designing search indexes and retrieval workflows, including filters, updates, lifecycle management, and relevance or performance evaluation.
• Strong PostgreSQL and SQL skills.
• Experience with automated testing, production observability, containerized services, and deployment recovery.
• Ability to communicate technical decisions clearly and produce maintainable documentation.

Responsibilities

• Design and implement scalable TypeScript/Node.js services for content discovery, search, and retrieval.
• Develop well‑defined APIs with versioned contracts, pagination, input validation, structured responses, and consistent error handling.
• Build and maintain search indexes with updates, versioning, rebuilds, freshness monitoring, and relevance evaluation.
• Implement MCP server tools with validated input schemas, bounded capabilities, structured outputs, and predictable failure behavior.
• Enforce caller identity and authorization across API, search, retrieval, and MCP execution paths.
• Protect database credentials and prevent direct database access or unrestricted SQL exposure to consumers and AI agents.
• Use PostgreSQL/SQL for data modeling, query analysis, stable identifiers, data quality validation, and provenance.
• Build automated unit, integration, and contract tests.
• Implement logging, metrics, tracing, performance diagnostics, and production monitoring.
• Support containerized deployments, safe rollbacks, operational recovery, documentation, and maintainable integration examples.
• Collaborate with platform, product, and engineering teams to deliver dependable services.

Skills

TypeScript

Node.js

REST APIs

Authentication

PostgreSQL

SQL

Testing

Observability

Containerized services

Documentation

Tools

Azure Container Apps

Job description

Quantum Technologies. LLC is seeking a hands‑on Senior Software Engineer to build secure backend services for content discovery, search, and MCP integrations. You’ll focus on scalable TypeScript/Node.js implementations, API design, and robust data access controls.

The role emphasizes production‑grade services, test coverage, observability, and containerized deployments. Collaboration with platform, product, and engineering teams will ensure dependable, scalable solutions for content platforms