Back End Developer

Back End Developer Company: Blessing Softtech Job Location: Pimpri-Chinchwad, Maharashtra, India Employment Type: Full-time Experience Required: 5+ years Blessing Softtech is hiring a Senior Backend Engineer to design, build, and scale the backend systems powering its AI products, including Fonazo, an AI voice agent platform. The role involves end-to-end ownership of backend engineering, including architecture, APIs, databases, performance optimisation, third-party integrations, and production reliability. Key Responsibilities: Design, develop, and maintain scalable, secure, high performance backend services using Python and FastAPI. Build and maintain RESTful APIs with authentication, validation, error handling, and API documentation using Swagger/OpenAPI. Design and optimise PostgreSQL databases, including schemas, relationships, SQL queries, indexing, transactions, and migrations. Implement asynchronous processing, background tasks, caching, and concurrency to improve application performance. Identify performance bottlenecks and ensure backend reliability and scalability. Containerise applications using Docker and support deployment across development, staging, and production environments on AWS. Develop CI/CD workflows, deployment processes, and rollback strategies. Integrate AI APIs and third-party services into backend workflows. Work with telephony platforms such as Plivo or Twilio for voice and call automation. Write clean, modular, maintainable Python code and implement unit and integration testing. Apply secure authentication, authorisation, input validation, and database security practices. Take end-to-end ownership of backend modules, participate in code reviews, mentor developers, and collaborate with frontend, QA, DevOps, and product teams. Required Skills: Strong Python programming skills. Hands-on experience with FastAPI. REST API development and third party integrations. SQL and PostgreSQL database management and optimisation. Docker, AWS, and CI/CD fundamentals. Git, GitHub, and collaborative development workflows. Unit testing, integration testing, debugging, and Postman. Python asynchronous programming and concurrency. Backend security, performance optimisation, and scalable architecture. Experience integrating AI APIs and telephony platforms such as Plivo or Twilio is an advantage. Eligibility: 5+ years of professional backend development experience. Ability to independently own backend development end to end. Strong analytical thinking and technical decision making. Proven experience delivering production ready, secure, and maintainable software. How to Apply Interested candidates should send their application to <em class="true-italic">hidden_email</em> Location: Viman Nagar, Pune, Maharashtra Employment Type: Full-time, On-site Joining: Immediate joiners preferred .