Contract - Backend Developer – Python / Fast API

Vivantify Technology Solutions India Private Limited; Pune District; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

Vivantify Technology Solutions India Private Limited in Pune is seeking a Backend Developer with 5–7 years of experience to design and build scalable RESTful APIs using Python and FastAPI, with PostgreSQL for data storage.

The role emphasizes asynchronous programming, authentication, testing with Pytest, and Docker-based deployments, plus CI/CD, monitoring, and collaboration with frontend, product, and DevOps teams. The position is contractor / sub-contractor based in Pune.

Qualifications

• Strong experience designing and developing backend services with Python and FastAPI.

Responsibilities

• Design and develop RESTful APIs using FastAPI.
• Build backend services and implement business logic using Python.
• Develop and optimize PostgreSQL queries and database operations.
• Implement authentication, authorization, validation, and secure API practices.
• Write and maintain unit and integration tests using Pytest.
• Support Docker, CI/CD pipelines, and production deployments.
• Troubleshoot backend issues and improve application performance.
• Collaborate with frontend, product, and DevOps teams.

Skills

Python

FastAPI

Python 3.8

Async programming

Pydantic

REST API development

API documentation

middleware

exception handling

PostgreSQL

SQL

Indexing

JSON/JSONB

Git

Docker

CI/CD

JWT/OAuth authentication

Pytest

Logging

debugging

monitoring

Tools

Docker

Git

CI/CD

Pytest

Job description

Location: Pune

Experience: 5–7 Years
Openings: 1
Employment Type: Contractor / Sub-con

About the Role

We are seeking a Backend Developer with strong experience in Python and FastAPI to build scalable, high-performance backend systems. The role focuses on developing RESTful APIs, working with PostgreSQL, implementing secure backend services, and supporting production-ready applications. The candidate will collaborate with frontend, product, and DevOps teams.

Job Description

The role involves designing and developing backend services and business logic using Python and FastAPI, with an emphasis on asynchronous programming, API validation, authentication, and reliable application performance. The developer will work extensively with PostgreSQL and SQL, including query optimization, indexing, transactions, and JSON/JSONB data.

The position also involves automated testing, Docker-based deployments, CI/CD pipelines, troubleshooting, logging, debugging, and monitoring. The developer will contribute to production deployments and continuous improvements to backend performance and reliability.

Key Responsibilities

• Design and develop RESTful APIs using FastAPI.
• Build backend services and implement business logic using Python.
• Develop and optimize PostgreSQL queries and database operations.
• Implement authentication, authorization, validation, and secure API practices.
• Write and maintain unit and integration tests using tools such as Pytest.
• Support Docker, CI/CD pipelines, and production deployments.
• Troubleshoot backend issues and improve application performance.
• Collaborate with frontend, product, and DevOps teams.

Required Skills

• Python
• FastAPI
• Python 3.8
• Async programming and Pydantic
• REST API development
• API documentation, middleware, and exception handling
• PostgreSQL and SQL
• Indexing, transactions, JSON/JSONB, and query optimization
• Git, Docker, and CI/CD
• JWT/OAuth authentication
• Pytest
• Logging, debugging, and monitoring

Preferred / Good to Have

• Redis or other caching solutions
• Message queues such as Kafka, RabbitMQ, or Celery
• Microservices experience
• Cloud platforms such as AWS, Azure, or GCP
• Kubernetes or container orchestration
• Observability tools such as Grafana, Prometheus, or ELK

Mandatory Skills

• Python

Candidate Profile

The ideal candidate will have backend development experience with strong hands-on expertise in Python, FastAPI, and PostgreSQL. The candidate should be comfortable developing production-ready APIs, troubleshooting performance issues, writing automated tests, and working collaboratively with product, frontend, and DevOps teams.

Benefits Package

• Competitive salary and benefits package
• Opportunities for professional growth and development
• A collaborative and inclusive work environment
• The opportunity to work on exciting and challenging projects with leading clients