Senior Python Developer
First seen by Alion on Aug 11, 2026.
Job Summary :
We are looking for a skilled Backend Developer with strong expertise in Python and FastAPI to design, develop, and maintain scalable, high-performance backend applications and RESTful APIs. The ideal candidate should have hands-on experience with asynchronous programming, API development, database integration, and cloud/containerized environments. Experience with Generative AI and frameworks such as Django or Flask will be an added advantage.
Key Responsibilities :
- Design, develop, test, and maintain scalable backend applications using Python.
- Build and maintain high-performance RESTful APIs using FastAPI.
- Develop asynchronous applications using async/await and Python async I/O.
- Design robust API contracts, request/response models, and validation using Pydantic.
- Implement authentication, authorization, error handling, logging, and API security best practices.
- Integrate backend services with relational databases such as MySQL and write optimized SQL queries.
- Work with data processing and analytical libraries such as Pandas and NumPy where required.
- Develop modular, maintainable, and reusable code following clean coding and software engineering practices.
- Containerize applications using Docker and support deployment across cloud environments.
- Work with AWS and/or Microsoft Azure services for application deployment and infrastructure integration.
- Collaborate with frontend developers, QA engineers, DevOps teams, and product stakeholders to deliver high-quality solutions.
- Troubleshoot production issues, perform root-cause analysis, and implement effective fixes.
- Participate in code reviews, technical discussions, and continuous improvement initiatives.
- Stay updated with emerging technologies, particularly Generative AI and modern Python backend frameworks.
Required Skills & Experience:
- 4-8 years of professional experience in backend development using Python.
- 2+ years of hands-on production experience with FastAPI.
- Strong understanding of REST API design principles and API development.
- Strong knowledge of asynchronous programming and async I/O in Python.
- Hands-on experience with Pydantic for data validation and schema management.
- Strong programming and problem-solving skills in Python.
- Experience with SQL and MySQL or other relational databases.
- Good understanding of Docker and containerized application development.
- Experience with AWS and/or Microsoft Azure.
- Familiarity with Django and/or Flask is preferred.
- Experience with Pandas and NumPy is an advantage.
- Exposure to Generative AI applications or integrations is a plus.
Preferred Skills:
- Generative AI
- FastAPI
- Python
- REST APIs
- Async I/O / Async Programming
- Pydantic
- Django / Flask
- Docker
- MySQL / SQL
- Pandas / NumPy
- AWS / Microsoft Azure
Ideal Candidate:
The ideal candidate is a hands-on Python Backend Developer who has strong production experience with FastAPI, REST APIs, asynchronous programming, and Pydantic, along with exposure to cloud platforms and containerization. Candidates with experience in Generative AI-based backend applications will be preferred.
Skills
Python, Django, Flask, RESTful API, MySQL, Pandas, Numpy