Software Application Engineer

Saisystems Technology is seeking an experienced API Developer / API Engineer to design, develop, secure, and maintain scalable RESTful APIs and integrations for enterprise applications. The role focuses on Python-based API development, API security, documentation, testing, and collaboration with application, cloud, security, and DevOps teams.

Responsibilities:

• Design and develop scalable REST APIs and backend services
• Develop APIs using Python and frameworks such as FastAPI, Flask, or Django
• Define API standards, architecture, request/response structures, and error handling
• Implement API security using OAuth 2.0, OpenID Connect, JWT, API keys, and RBAC
• Apply authentication, authorization, rate limiting, throttling, and other API security controls
• Develop and maintain API documentation using OpenAPI/Swagger
• Integrate APIs with databases, cloud services, third-party applications, and enterprise systems
• Perform API testing, troubleshooting, performance tuning, and monitoring
• Collaborate with application, cloud, security, and DevOps teams
• Follow API governance, versioning, lifecycle management, and security best practices
• Participate in code reviews and ensure high-quality, maintainable Python code

Requirements:

• API Design – Intermediate
• API Security – Intermediate
• API Development / API Engineering – Mastery
• Python – Intermediate
• Strong experience with RESTful APIs and microservices
• Experience with FastAPI, Flask, or Django
• Knowledge of OAuth 2.0, JWT, OpenID Connect, API authentication and authorization
• Experience with Swagger/OpenAPI
• Understanding of API gateways, rate limiting, throttling, and API versioning
• Experience with Git and CI/CD practices
• Good understanding of HTTP, JSON, REST principles, and web services
• 5+ years of software/API development experience, with strong hands-on API development experience
• Strong problem-solving and communication skills
• Experience with API Gateway platforms such as Apigee, AWS API Gateway, Azure API Management, or Kong
• Experience with cloud platforms such as AWS, Azure, or GCP
• Knowledge of event-driven architecture and messaging systems
• Experience with Docker and Kubernetes
• Familiarity with automated API testing tools such as Postman or pytest
• Bachelor's degree in Computer Science, Engineering, or a related field preferred