Backend Developer - Python

We are seeking an experienced Python Backend Developer with strong expertise in SDK development, API design, and application security. The ideal candidate will build robust backend systems, integrate third-party services, and ensure secure, scalable backend operations.

Responsibilities:

• Design, develop, and maintain backend services using Python and modern frameworks (e. g., FastAPI, Django, Flask).
• Build and maintain SDKs to support internal and external integrations.
• Develop clean, scalable, and reusable RESTful and/or GraphQL APIs.
• Implement and enforce security best practices, including authentication, authorization, encryption, secrets management, and OWASP guidelines.
• Collaborate with frontend, DevOps, and product teams to deliver end-to-end features.
• Integrate external APIs and third-party services efficiently and securely.
• Optimize backend performance, scalability, logging, and monitoring.
• Write automated tests and maintain high code quality through CI/CD pipelines.
• Work with client SMEs to understand existing workflows, formulas, and rules and translate them into maintainable backend services.
• Consume and work with existing data models and database schemas (SQL/NoSQL) to support analytical workflows, operational planning applications, and integration of machine learning outputs into backend services.
• Leverage Redis (or similar in-memory stores) for caching and performance optimization, ensuring fast response times for data-driven APIs and applications.
• QX | Public Utilize middleware, message queues, and streaming technologies (e. g., Kafka, Event Hubs, RabbitMQ) to build reliable, scalable data flows and event-driven backend services.

Requirements:

• Bachelor's or master's degree in computer science, artificial intelligence, software engineering, data science, or a related field.
• 5+ years of proven experience as a Python developer specializing in backend systems.
• Hands-on experience with SDK design, development, and documentation.
• Strong knowledge of API development (REST, GraphQL), API versioning, and standards.
• Strong understanding of data modeling, multi-source data integration (SQL/NoSQL/warehouse), and analytical data flows.
• Solid understanding of application security, including OAuth2 JWT, API keys, secure coding practices, data privacy and encryption, security testing & vulnerability mitigation.
• Experience with Python frameworks such as FastAPI, Django, and Flask.
• Knowledge of databases (PostgreSQL, MySQL, MongoDB, Redis).
• Familiarity with CI/CD, Git, Docker, Kubernetes, and cloud platforms (AWS, GCP, Azure).
• Experience with caching (Redis), asynchronous processing, and performance tuning for low-latency user interactions.