Job Title: Senior Cloud-Native Backend Engineer

Overview

We are looking for a strong Senior Backend Engineer with deep expertise in Python, modern web frameworks, and cloud-native development on AWS The ideal candidate will have strong hands-on experience developing scalable backend services, RESTful APIs, distributed systems, and microservices using Python and frameworks such as Django and FastAPI, along with solid experience in AWS, containerization, CI/CD, and modern software engineering practices.

This role provides an opportunity to work on high-scale, business-critical systems and contribute to the modernization of the platform toward RESTful APIs, microservices, and cloud-native solutions.

Key Responsibilities

- Design, develop, and maintain scalable, reliable, and high-performance backend services using Python.
- Build production-grade web services and RESTful APIs using Django, FastAPI, or similar Python web frameworks.
- Design and develop modular, maintainable, testable, and secure backend architectures.
- Develop and deploy cloud-native applications and services on AWS.
- Design solutions with a strong focus on scalability, availability, fault tolerance, performance, and reliability.
- Contribute to modernization of existing SOAP-based integrations toward RESTful APIs and microservices-based architectures.
- Implement asynchronous processing, concurrency, and distributed system patterns where appropriate.
- Develop and maintain CI/CD pipelines and automate build, testing, deployment, and operational workflows.
- Work with Docker, Kubernetes, Terraform, and Infrastructure-as-Code practices to deploy and manage cloud-native services.
- Implement effective monitoring, logging, metrics, and distributed tracing to ensure strong observability.
- Troubleshoot complex production, performance, and reliability issues and drive root-cause analysis and resolution.




- Work with SQL and NoSQL databases and design appropriate data-access and persistence strategies.
- Participate in technical design discussions, code reviews, and architecture reviews.
- Write high-quality, well-tested, secure, and maintainable code following engineering best practices.
- Collaborate with product, QA, DevOps, and other engineering teams to deliver reliable solutions.
- Contribute to technical debt reduction, platform optimization, and continuous engineering improvements.

Skills & Qualifications

- Strong hands-on experience in Python backend development, with a track record of building production-grade services and APIs.
- Strong hands-on experience with Python web frameworks such as Django and FastAPI.
- Strong understanding of Python fundamentals, including async programming, concurrency, error handling, testing, and performance optimization.
- Strong experience designing and developing RESTful APIs, microservices, and distributed systems.
- Strong understanding of API design principles, authentication, authorization, validation, versioning, error handling, and API security.
- Strong experience developing and operating applications in AWS cloud environments.
- Experience building cloud-native applications and working with modern cloud architectures.
- Hands-on experience with Docker and Kubernetes.
- Experience with Terraform or other Infrastructure-as-Code tools.
- Strong understanding of CI/CD and DevOps practices.
- Experience with SQL and NoSQL databases, including database design and performance optimization.




- Good understanding of distributed-system concepts including scalability, availability, resilience, retries, timeouts, circuit breakers, and fault tolerance.
- Experience with observability, including metrics, logging, monitoring, and distributed tracing.
- Experience with automated testing, including unit, integration, and API testing.
- Strong debugging, problem-solving, and analytical skills.
- Good understanding of secure software development and cloud security best practices.
- Ability to independently own technical problems from design through implementation, testing, deployment, and production support.

Positive to Have

- Experience with Kafka or other distributed messaging/event-streaming platforms.
- Experience with caching technologies such as Redis.
- Experience building serverless or event-driven architectures.
- Experience with Python performance engineering and optimization.
- Experience with airline, travel, reservation, or other transaction-intensive systems.
- AWS certification such as Solutions Architect, Developer, or DevOps Engineer.
- Experience working with legacy SOAP/XML-based integrations and modernization to REST/microservices.
- Basic understanding of C++ for legacy integrations is a plus.

What Were Looking For

- A hands-on senior backend engineer with strong Python expertise.
- Strong practical experience with Django/FastAPI and REST API development.
- Solid experience building and operating cloud-native applications on AWS.
- Strong understanding of distributed systems and backend architecture.
- Someone who can own backend services end-to-end, from design and development through deployment and production support.
- An engineer who is comfortable solving complex technical problems and continuously improving scalability, reliability, performance, and maintainability.

📌 Senior Cloud-Native Backend Engineer (Pune)
🏢 Calsoft
📍 Pune