Python API Developer

SAI Group Ltd; Kolkata District; On-site; INR 900,000 - 1,500,000; Full time

Job summary

SAI Group Ltd in India is seeking a Python API Developer with 2+ years of experience to design, build, and maintain scalable RESTful APIs and backend services, using FastAPI or Flask and integrating external services.

You will work with relational databases, implement authentication and API security, write clean code, participate in testing, reviews, and cross‑functional collaboration, and document APIs.

Qualifications

• 2+ years in Python backend/API development.
• Proficient Python coding and API design.
• Experience with FastAPI or Flask REST frameworks.
• Knowledge of relational databases (PostgreSQL/MySQL).
• Familiarity with Git workflows and OpenAPI.
• Understanding of JWT/OAuth2 authentication.

Responsibilities

• Design, develop, test, and maintain RESTful APIs using Python.
• Build backend services with FastAPI or Flask.
• Integrate third-party APIs and external services.
• Work with relational/NoSQL databases and optimize queries.
• Implement authentication, authorization, and API security.
• Write clean, maintainable, well-documented code.
• Perform API testing, debugging, and troubleshooting.
• Collaborate with frontend, QA, DevOps, and product teams.
• Participate in code reviews and best practices.
• Improve API performance, scalability, reliability.
• Maintain API technical documentation.

Skills

Python

FastAPI/Flask

REST API design

PostgreSQL/MySQL

SQL

Git/GitHub

OpenAPI/Swagger

JWT/OAuth2

Unit testing

SDLC practices

API security

Tools

Docker

AWS

Azure

GCP

Redis

RabbitMQ

Kafka

CI/CD

Linux

Job description

We are looking for a skilled Python API Developer with 2+ years of professional experience in developing, integrating, and maintaining scalable RESTful APIs and backend applications.

Key Responsibilities

• Design, develop, test, and maintain robust RESTful APIs using Python.
• Build backend services using FastAPI or Flask.
• Integrate third-party APIs and external services.
• Work with relational/NoSQL databases and optimize queries.
• Implement authentication, authorization, validation, error handling, and API security.
• Write clean, reusable, maintainable, and well-documented code.
• Perform API testing, debugging, and troubleshooting.
• Collaborate with frontend, QA, DevOps, and product teams.
• Participate in code reviews and follow development best practices.
• Improve API performance, scalability, and reliability.
• Maintain technical documentation for APIs and backend services.

Required Skills

• 2+ years of professional experience in Python backend/API development.
• Strong proficiency in Python.
• Hands-on experience with FastAPI or Flask REST Framework.
• Strong understanding of REST APIs, HTTP methods, status codes, JSON, and API design.
• Experience with PostgreSQL, MySQL, or similar relational databases.
• Good knowledge of SQL and database design.
• Experience with Git/GitHub.
• Familiarity with Swagger/OpenAPI.
• Understanding of JWT/OAuth2 authentication.
• Knowledge of unit testing and API testing.
• Good understanding of SDLC and coding best practices.

Good to Have

• Docker and containerized applications.
• AWS, Azure, or GCP experience.
• Redis, RabbitMQ, or Kafka.
• CI/CD pipelines.
• Microservices architecture.
• Linux and basic deployment practices.
• Agile/Scrum experience.