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Job Title: Senior AI Engineer (12 PM - 9 PM IST shift)Location: RemoteEmployment Type: Full-timeSalary: Market Range• Minimum 5 years of Python experience• Minimum 3 years of AI experience• At least 2 years of experience building LLM-based applications• 3 years of experience may be considered if the candidate has strong pharmaceutical industry experience• Strong and confident communication skills are essentialJOB SUMMARYWe are seeking an experienced and innovative AI Software Engineer to join our artificial intelligence team. The ideal candidate will possess a deep passion for leveraging the transformative capabilities of artificial intelligence to redefine critical aspects of the pharmaceutical industry, including drug discovery, development, clinical trials, and commercialisation. Your contributions will play a key role in accelerating our mission to bring life-saving treatments to market more efficiently.The AI Software Engineer will undertake the design, implementation, and maintenance of AI solutions, encompassing databases, data processing systems, model development, testing protocols, and user interfaces when necessary. The focus of this role is to deliver autonomous solutions that accelerate business initiatives, while ensuring that solutions are maintainable and built-to-last.The AI Software Engineer ensures adherence to all relevant regulatory requirements and Company Standard Operating Procedures (SOPs) as appropriate.ESSENTIAL FUNCTIONS• Design, develop, and maintain LLM-powered services, including prompt pipelines, embeddings, vector indexing, and retrieval logic.• Build and maintain Python backend services with scalable, reliable architecture.• Integrate internal and external APIs to support end-to-end AI workflows.• Implement and optimize RAG pipelines, chunking, reranking, and text-processing components.• Collaborate with engineers and cross-functional partners to turn requirements into solutions.• Write clean, tested, well-documented code and participate in high-quality code reviews.• Ensure security, privacy, and compliance in all data-handling and code practices.• Troubleshoot and optimize existing AI/ML pipelines for performance and maintainability.KNOWLEDGE/SKILLS/ABILITIES REQUIRED• 5+ years of strong Python engineering (OOP, typing, testing, clean architecture, PEP-8 discipline), with at least 2 years building production LLM applications.• Proven experience deploying LLM-powered applications in production.• Hands-on experience with LLM frameworks: LangChain, LlamaIndex, Sentence Transformers, vector stores, and rerankers.• Understanding of embeddings / vector search techniques (cosine similarity, semantic scoring).• Backend API engineering: FastAPI or similar frameworks (Flask, Starlette), RESTful design, authentication flows.• SQL proficiency: schema design, indexing, query optimization. SQLAlchemy experience preferred.• Cloud experience: Azure preferred (App Services, Storage, Cognitive Search, Key Vault).• Production-grade code practices: error handling, logging, documentation, and maintainability.• Strong Git workflow discipline (PR quality, branching strategies, code review).• Excellent problem-solving and communication skills, comfortable working independently and asynchronously across time zones.• Familiarity with React/TypeScript and frontend API integration is a plus.• Experience with logging/telemetry/observability tools (Application Insights, structured logging) is a plus.