Flask Developer

Job Description: Flask Developer

Software Engineering

Full-Time

Job Title

Flask Developer

Experience

3–8 Years

Employment Type

Full-Time

Department

Software Development / Engineering

Location

Hyderabad / Bangalore / Pune / Chennai

Work Mode

Hybrid / On-site / Remote

1. Job Summary

We are looking for an experienced Flask Developer to design, develop, and maintain scalable, secure, and high-performance backend applications using Python and the Flask framework.

The ideal candidate should have strong experience in Python programming, Flask, REST API development, microservices architecture, database management, and cloud technologies.

The candidate will collaborate with frontend developers, QA engineers, DevOps teams, and product managers to build reliable backend services and enterprise applications.

2. Key Responsibilities

• Design, develop, and maintain backend applications using Python and Flask.
• Build scalable RESTful APIs and microservices.
• Develop reusable application components and backend business logic.
• Integrate third-party APIs and external services.
• Implement authentication and authorization using JWT and OAuth 2.0.
• Design and optimize database schemas and SQL queries.
• Work with relational and NoSQL databases.
• Implement ORM solutions using SQLAlchemy.
• Develop asynchronous tasks and background processing.
• Optimize application performance, scalability, and security.
• Write unit tests and integration tests using Pytest and unittest.
• Debug application issues and troubleshoot production defects.
• Collaborate with frontend developers for API integration.
• Participate in code reviews and technical design discussions.
• Deploy applications using Docker and cloud platforms.
• Maintain CI/CD pipelines and automated deployment workflows.

3. Required Technical Skills

Technical Area

Required Skills

Programming Language

Python 3.x

Backend Framework

Flask

API Development

REST APIs, JSON

API Documentation

Swagger, OpenAPI

ORM

SQLAlchemy

Database

PostgreSQL, MySQL

NoSQL

MongoDB, Redis

Authentication

JWT, OAuth 2.0

Testing

Pytest, unittest

Microservices

Flask-based Microservices

Messaging

RabbitMQ, Kafka

Task Processing

Celery

Version Control

Git, GitHub, GitLab

Cloud

AWS, Azure, GCP

Containerization

Docker, Kubernetes

Web Servers

Gunicorn, uWSGI, Nginx

CI/CD

Jenkins, GitHub Actions

4. Required Qualifications

• Bachelor's or Master's degree in Computer Science, Information Technology, or a related field.
• 3–8 years of professional software development experience.
• Strong hands-on experience with Python programming.
• Experience developing applications using Flask.
• Good understanding of Python OOP concepts and data structures.
• Experience designing and developing RESTful APIs.
• Knowledge of microservices architecture.
• Experience with SQL databases and database optimization.
• Understanding of authentication and authorization mechanisms.
• Experience with unit testing and integration testing.
• Familiarity with Git and Agile/Scrum methodologies.
• Strong analytical, debugging, and problem-solving skills.

5. Preferred Qualifications

• Experience developing large-scale enterprise backend applications.
• Knowledge of asynchronous programming using Python.
• Experience with Flask Blueprints and application factories.
• Familiarity with FastAPI and Django.
• Experience with Celery and Redis for background processing.
• Knowledge of event-driven architecture.
• Experience deploying applications on AWS, Azure, or GCP.
• Familiarity with Kubernetes and container orchestration.
• Experience with API security and performance optimization.
• Knowledge of AI/ML model integration and LLM APIs.

6. Key Competencies

• Strong Python programming skills.
• Excellent analytical and problem-solving abilities.
• Understanding of backend architecture and API development.
• Ability to build scalable and maintainable applications.
• Strong database design and optimization knowledge.
• Effective communication and teamwork.
• Ownership of development tasks and deliverables.

7. Key Performance Indicators (KPIs)

• Backend application performance and scalability.
• API response time and reliability.
• Code quality and maintainability.
• Database query optimization.
• Application security and stability.
• Unit test coverage and defect reduction.
• Successful delivery of development milestones.
• Reduction in production issues.

8. Interview Process

• Initial Technical Screening
• Python Programming and Coding Assessment
• Flask Framework Technical Round
• REST API and Microservices Round
• Database and SQL Optimization Round
• System Design and Architecture Round
• Technical Manager / HR Discussion

9. Candidate Search Keywords

Useful for Naukri, LinkedIn, and JobDiva recruitment searches

• Flask Developer
• Python Flask Developer
• Flask Backend Developer
• Senior Flask Developer
• Python Backend Engineer
• Flask Software Engineer
• Flask API Developer
• Python API Developer
• Flask Microservices Developer
• Python Web Developer
• Flask Application Developer
• Python Cloud Developer
• Flask REST API Developer
• Backend Software Engineer

10. Technical Screening Questions

No.

Interview Question

1

What is Flask, and what are its key features?

2

What is the difference between Flask and Django?

3

Explain Flask routing and request handling.

4

What are Flask Blueprints?

5

What is the Flask application factory pattern?

6

How do you develop REST APIs using Flask?

7

How do you implement JWT authentication in Flask?

8

How do you integrate SQLAlchemy with Flask?

9

How do you handle exception handling and logging in Flask?

10

How do you deploy Flask applications using Docker and Gunicorn?

11. Boolean Search String for Recruitment

("Flask Developer" OR "Python Flask Developer" OR "Flask Backend Developer" OR "Flask Software Engineer") AND (Python AND Flask) AND ("REST API" OR Microservices OR Backend) AND (SQLAlchemy OR PostgreSQL OR MySQL) AND (Docker OR AWS OR Kubernetes)

JobDiva Recruitment Details

Field

Suggested Value

Job Title

Flask Developer

Experience

3–8 Years

Job Type

Full-Time

Openings

2

Primary Skills

Python, Flask

Secondary Skills

REST APIs, SQLAlchemy

Database

PostgreSQL / MySQL

Additional Skills

Redis, Celery, Docker

Education

Bachelor's Degree

Must-have skills

Python, Flask, REST API Development, SQLAlchemy, PostgreSQL/MySQL, Git, Pytest.

Recruitment tip

Prioritize candidates who have developed and deployed production-level Flask REST APIs rather than candidates who have only worked on basic Flask web applications.