Senior AI Engineer

We are looking for a Senior AI Engineer with 4+ years of experience to design, build, and scale production-grade AI systems powering the next generation of AiSensy's WhatsApp engagement platform.

You will work hands-on across LLMs, RAG, AI Agents, embeddings, vector search, AI evaluation, and AI-powered microservices. You will own AI solutions end-to-end-from problem definition and architecture to development, deployment, monitoring, and continuous optimization.

This role is ideal for someone who has moved beyond experimentation and has real-world experience taking AI/ML systems into production, with a strong focus on scalability, accuracy, latency, reliability, and business impact.

What You'll Own:

• AI/ML & LLM Engineering
• Design, develop, and deploy production-grade AI/ML solutions for real-world business use cases.
• Build and optimize LLM-powered applications, RAG pipelines, AI Agents, and intelligent automation workflows.
• Evaluate and select appropriate models, architectures, prompting strategies, and retrieval approaches for different use cases.
• Work with OpenAI, Google Generative AI, and other foundation model providers.
• Build reusable AI components and services that can scale across multiple product use cases.
• RAG & Vector Search
• Design production-grade Retrieval-Augmented Generation (RAG) systems.
• Develop effective document ingestion, chunking, embedding, indexing, retrieval, and reranking pipelines.
• Work with vector databases such as Pinecone, Qdrant, or equivalent technologies.
• Optimize retrieval quality, relevance, latency, and cost.
• Implement hybrid search and other advanced retrieval techniques where appropriate.
• AI Agents & Automation
• Design and build AI Agents capable of reasoning, tool usage, workflow execution, and context management.
• Integrate AI systems with internal APIs, databases, and third-party services.
• Build reliable guardrails around agentic workflows to ensure accuracy, safety, and predictable behavior.
• Develop AI-powered automation for customer engagement and business workflows.
• Backend & AI Infrastructure
• Build high-performance AI microservices using Python and FastAPI/Flask.
• Design scalable APIs and services for AI-powered product features.
• Work with MongoDB and other data stores for structured and unstructured AI data.
• Design asynchronous and scalable workflows for AI inference and data processing.
• Implement caching and optimization strategies using technologies such as Redis where required.
• AI Evaluation & Optimization
• Establish evaluation frameworks for LLM and RAG applications.
• Measure metrics such as accuracy, relevance, groundedness, hallucination rate, latency, and cost.
• Develop strategies to reduce hallucinations and improve response quality.
• Optimize prompts, retrieval strategies, model selection, and inference workflows.
• Continuously evaluate new models and AI technologies for potential production use.
• Performance & Reliability
• Optimize AI systems for latency, throughput, scalability, reliability, and cost.
• Identify performance bottlenecks across model inference, retrieval, APIs, databases, and external integrations.
• Design systems capable of handling high-volume production workloads.
• Implement appropriate logging, monitoring, error handling, and observability.
• Engineering & Technical Leadership
• Own AI features from architecture and development through deployment and post-production optimization.
• Participate in system design, architecture, and technical decision-making.
• Conduct code and design reviews and maintain high engineering standards.
• Mentor junior AI/ML engineers and contribute to best practices across the AI engineering team.
• Collaborate closely with Product Managers, Backend Engineers, Data teams, and leadership.

Must-Have Qualifications:

• 4+ years of professional experience in AI/ML Engineering, Machine Learning Engineering, Applied AI, or a closely related role.
• Strong proficiency in Python and backend development.
• Hands-on experience building and deploying production AI/ML systems.
• Strong practical experience with LLMs and Generative AI applications.
• Hands-on experience building RAG pipelines, including chunking, embeddings, retrieval, and evaluation.
• Experience integrating OpenAI SDK, Google Generative AI SDK, or equivalent LLM APIs.
• Strong understanding of embeddings, semantic search, vector databases, and retrieval pipelines.
• Experience with FastAPI, Flask, or similar Python backend frameworks.
• Experience with vector databases such as Pinecone, Qdrant, Weaviate, Milvus, or equivalent.
• Experience working with MongoDB or similar databases.
• Strong understanding of AI evaluation, hallucination mitigation, prompt engineering, and LLM optimization.
• Good understanding of ML fundamentals including Transformers, neural networks, classification, clustering, KNN, and model evaluation.
• Understanding of API security, authentication, data privacy, and secure AI application design.
• Strong debugging, system design, and problem-solving skills.

Good to Have:

• Experience with LangChain, LlamaIndex, LangGraph, or similar frameworks.
• Hands-on experience building AI Agents / agentic workflows.
• Experience with multimodal AI applications.
• Exposure to fine-tuning, LoRA/PEFT, or model adaptation workflows.
• Experience with hybrid search, reranking, BM25, or advanced retrieval optimization.
• Understanding of distributed systems and event-driven architectures.
• Experience with Redis or other caching systems.
• Experience optimizing LLM inference latency and cost.
• Experience with Docker, Kubernetes, AWS, or GCP.
• Familiarity with CI/CD and production ML/AI deployment practices.
• Experience with Node.js for integrations or auxiliary services.
• Experience working on SaaS, MarTech, conversational AI, CRM, CPaaS, or customer engagement products.

What We're Looking For:

• Someone who has built and shipped AI systems to production, not just worked on POCs.
• Strong engineering fundamentals combined with practical AI/ML expertise.
• Ability to translate ambiguous business problems into scalable AI solutions.
• Strong ownership of system quality, accuracy, performance, and reliability.
• Comfortable making technical decisions independently.
• Strong experimentation mindset with a focus on measurable outcomes.
• Ability to mentor engineers and raise the technical bar of the team.
• Comfortable working in a fast-paced, high-growth startup environment.

What Success Looks Like:

• Production AI features are delivered reliably and adopted by users.
• RAG and AI Agent systems achieve strong accuracy and relevance.
• AI applications maintain low latency and high reliability at scale.
• Hallucination and failure rates are continuously reduced.
• AI infrastructure is optimized for performance and cost.
• AI capabilities create measurable impact on customer experience and business outcomes.
• Engineering standards and AI development practices improve across the team.

Skills

LLMs, Large Language Models, Python, RAG, Retrieval-Augmented Generation