Python Backend Developer

CS Solutions, Inc.
Miami, United States of America
9 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English

Job location

Miami, United States of America

Tech stack

API
Artificial Intelligence
User Authentication
Databases
Relational Databases
Database Design
Database Queries
Dependency Injection
Django
Middleware
Python
PostgreSQL
Microsoft SQL Server
MySQL
OAuth
OpenID
Performance Tuning
Query Optimization
Role-Based Access Control
Openid Connect
Session Management
Single Sign-On
Software Deployment
SQLAlchemy
Data Streaming
Systems Integration
Management of Software Versions
Web Application Frameworks
React
Flask
Large Language Models
Database Optimization
Software Security
Indexer
Backend
FastAPI
Front End Software Development
React
Virtual Agents
REST
Api Management
Microservices

Job description

  • Design and develop scalable, production-grade backend services using Python frameworks (FastAPI / Flask / Django)
  • Architect, build, and integrate RESTful APIs and backend microservices with strong attention to performance, reliability, and security
  • Design and optimize relational database structures using PostgreSQL / MySQL / SQL Server including schema design, indexing strategies, query optimization, and data modeling
  • Implement robust authentication and authorization frameworks beyond basic JWT including OAuth 2.0 / OpenID Connect, SSO integrations, session management, token lifecycle (refresh/rotation/revocation), and role-based / attribute-based access control (RBAC/ABAC)
  • Develop responsive frontend applications using ReactJS (Hooks, state management) to support backend-driven features
  • Integrate AI and LLM-powered capabilities into backend services, including agentic workflows and tool-calling patterns
  • Apply MCP (Model Context Protocol) concepts to connect AI agents with backend services, APIs, and data sources
  • Collaborate with cross-functional teams on API contracts, data flows, and end-to-end feature delivery

Requirements

  • Python Backend (Primary): Strong, hands-on experience building backend services with FastAPI / Flask / Django async patterns, dependency injection, middleware, API versioning, testing, and production deployment
  • Databases: Deep practical experience with PostgreSQL / MySQL / SQL Server complex queries, joins, indexing, transactions, ORM usage (SQLAlchemy / Django ORM), and performance tuning
  • Authentication & Security: Demonstrated depth in auth frameworks beyond JWT basics OAuth 2.0, OIDC, SSO, RBAC, secure session handling, and API security best practices
  • RESTful APIs: Proven experience designing, building, and integrating REST APIs and backend services at scale
  • AI / Agentic AI / MCP: Solid understanding of LLM fundamentals, agentic AI architectures (planning, tool use, multi-step workflows), and the Model Context Protocol (MCP) for agent system integration; familiarity with frameworks such as LangChain / LangGraph is a strong plus
  • ReactJS (Secondary): Hands-on expertise with ReactJS Hooks, component lifecycle, and state management (Redux / Context API)

Candidate Profile Expectations

  • Backend-dominant full-stack engineer: roughly 80 90% Python/backend and 10 20% React in day-to-day work, must have AI experience.
  • Must be able to demonstrate, in technical conversation, real depth in Python, database design, and authentication frameworks not just frontend fluency
  • Frontend-heavy profiles (e.g., 80/20 frontend/backend) will not be a fit for this role

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