Python Backend Developer – Flask / FastAPI

Winzons; India; On-site; INR 900,000 - 1,300,000; Full time

Job summary

Cognition Techsystems in Pune, India is seeking a skilled Python Backend Developer to design, build, and maintain robust backend systems and APIs powering data-driven enterprise applications.

The role emphasizes clean architecture, API design, Azure hosting, and collaboration with frontend teams, across deployment pipelines and data platform integration.

Qualifications

• 5+ years of backend Python experience.
• Experience with FastAPI or Flask and REST APIs.
• Experience with Azure cloud services and data platforms.
• Familiarity with CI/CD and DevOps practices.

Responsibilities

• Design, develop, and maintain RESTful and asynchronous APIs.
• Integrate backend APIs with frontend apps.
• Deploy and manage backend services on Microsoft Azure.
• Design and maintain CI/CD pipelines.
• Follow clean architecture and coding best practices.

Skills

Python backend

FastAPI or Flask

REST APIs

Async programming

API versioning

Azure cloud services

SQL databases

CI/CD

Tools

Azure Databricks

Microsoft Fabric

SQLAlchemy

pyodbc

Job description

Company Name: Cognition Techsystems Job Role: Python Backend Developer Work Type: Full-Time Job Category: Software Development / Backend Engineering Experience: 5-12 Years (or as per requirement) Location: Pune, India

About the Role:

We are looking for a skilled Python Backend Developer to design, build, and maintain robust backend systems and APIs that power data-driven enterprise applications. This role sits at the intersection of backend engineering and data platform integration. You will be responsible for creating clean, scalable, and production-ready Python services that integrate seamlessly with modern data platforms, cloud infrastructure, and AI-enabled applications.

The ideal candidate writes code that others enjoy maintaining, thinks in systems, and brings strong engineering discipline across the stack-from API design to deployment pipelines.

Key Responsibilities:

• API Design & Development :
  • Design, develop, and maintain RESTful and asynchronous APIs using frameworks such as FastAPI or Flask, adhering to OpenAPI/Swagger standards.
• Data Source Integration :
  • Azure Databricks (Databricks Connect, REST APIs)
  • Microsoft Fabric (OneLake, SQL Analytics Endpoints, REST APIs)
  • SQL Server & Azure SQL Database (SQLAlchemy, pyodbc, ODBC drivers)
  • Other relational and NoSQL databases as required
• Application Integration :
  • Collaborate with frontend teams to integrate backend APIs into applications built using React or other modern frameworks, ensuring :
  • Stable data contracts
  • Proper error handling and propagation
  • API versioning and backward compatibility
• Modular Code Architecture : Build well-structured, modular, and reusable backend components following clean architecture principles, Azure Hosting & Cloud Deployment
  • Deploy and manage backend services on Microsoft Azure, leveraging services such as App Services, Containers, or related cloud infrastructure.
• CI/CD Pipelines : Design and maintain CI/CD pipelines to enable automated testing, builds, and deployments.
• Coding Standards & Best Practices : Follow best practices for coding, testing, documentation, security, and performance optimization.

Required Skills:

• Strong proficiency in Python for backend development
• Experience with FastAPI or Flask
• Solid understanding of REST APIs, async programming, and API versioning
• Hands-on experience with Azure cloud services
• Experience integrating with SQL-based databases and data platforms
• Familiarity with CI/CD tools and DevOps practices
• Good understanding of software design patterns and clean architecture