Senior Python Backend Developer (FastAPI, AWS, PostgreSQL)

Job description

Position Description Founded in 1976, CGI is among the largest independent IT and business consulting services firms in the world. With 94,000 consultants and professionals across the globe, CGI delivers an end-to-end portfolio of capabilities, from strategic IT and business consulting to systems integration, managed IT and business process services and intellectual property solutions. CGI works with clients through a local relationship model complemented by a global delivery network that helps clients digitally transform their organizations and accelerate results. CGI Fiscal 2024 reported revenue is CA$14.68 billion and CGI shares are listed on the TSX (GIB.A) and the NYSE (GIB). Learn more at cgi.com. Job Title: Python Pyspark and AWS Developer Position: Senior Software Engineer Experience: 5- 8 Years Category: Software Development/ Engineering Shift: General Main location: Hyderabad, Bangalore, Chennai Position ID: J0626-2028 #LI-SP40 Employment Type: Full Time Education Qualification: Bachelor's degree in Computer Science or related field or higher with minimum 5 years of relevant experience. We are looking for an experienced Python Backend Developer with strong expertise in FastAPI, PostgreSQL, and AWS cloud services. The ideal candidate should have experience designing and developing scalable, secure, and high-performance RESTful APIs for enterprise applications. The role requires hands-on experience with asynchronous programming, database optimization, cloud-native architectures, and production support. **Your future duties and responsibilities** Design, develop, and maintain scalable backend applications using Python and FastAPI. Build production-grade REST APIs following clean architecture and best coding practices. Develop reusable and maintainable code using Pydantic models, dependency injection, and asynchronous programming. Design and implement authentication and authorization mechanisms using JWT/OAuth2. Develop middleware for logging, monitoring, request validation, exception handling, and security. Optimize application performance through asynchronous processing, background tasks, caching, and rate limiting. Design, develop, and optimize PostgreSQL database schemas for high-performance applications. Write efficient SQL queries using joins, CTEs, window functions, and query optimization techniques. Create and maintain database migrations using Alembic. Work with SQLAlchemy (preferably Async SQLAlchemy) for ORM implementation. Manage transactions, connection pooling, and database performance tuning. Build event-driven solutions using AWS services such as SQS, SNS, Lambda, and Step Functions. Develop ETL/data processing solutions using AWS Glue where applicable. Configure application monitoring, logging, and alerting using Amazon CloudWatch. Participate in architecture discussions, code reviews, production deployments, and troubleshooting. Collaborate with cross-functional teams following Agile methodologies. **Required qualifications to be successful in this role** Must-Have Skills: Python 3.x FastAPI AsyncIO / Async Programming Pydantic SQLAlchemy (Async preferred) Alembic REST API Development Authentication & Security JWT Authentication OAuth2 API Security Best Practices Role-Based Access Control (RBAC) Database PostgreSQL Database Schema Design Indexing Strategies Query Optimization EXPLAIN ANALYZE Common Table Expressions (CTEs) Window Functions Transaction Management Connection Pooling AWS Cloud AWS Lambda Amazon SQS Amazon SNS AWS Step Functions AWS Glue Amazon CloudWatch IAM (preferred) Additional Skills Git Docker CI/CD Pipelines Unit Testing (PyTest) API Documentation (OpenAPI/Swagger) Agile/Scrum Preferred Qualifications Experience designing scalable microservices. Knowledge of distributed systems and event-driven architectures. Experience with caching technologies such as Redis. Understanding of API rate limiting and performance optimization. Experience deploying applications on AWS using Infrastructure as Code (Terraform/CloudFormation is a plus). Exposure to Kubernetes/EKS is an added advantage. Required Competencies Strong problem-solving and analytical skills. Excellent debugging and performance tuning capabilities. Ability to design scalable and maintainable enterprise solutions. Good communication and stakeholder management skills. Experience working in Agile development environments. **Together, as owners, let’s turn meaningful insights into action.** Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because… You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction. Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise. You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons. That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals. Come join our team—one of the largest IT and business consulting services firms in the world.