Senior MERN Stack Developer/Fullstack Mern,/ MERN Stack

Position Title:Senior MERN Stack Developer

Required Experience : 7+

Job Location: Hyderabad / Indore

Shift Timing : 11 AM - 8PM

Client round F2F ( Mandatory)

Job Description (Job Summary/Roles & Responsibilities)

We are currently seeking a highly skilled and motivated Senior Fullstack (MERN) Developer to join our BCS Delivery Team. In this role, you will contribute to building foundational enterprise-wide solutions focused on document ingestion, unstructured data storage, knowledge management, and process automation. Your work will solve some of the toughest challenges across Marsh McLennan, delivering scalable and resilient services that support large user bases and critical revenue streams. You will collaborate with talented professionals in a dynamic environment, leveraging cutting-edge technologies including AI and Large Language Models (LLMs) to drive innovation and operational excellence. This position will be based in Delhi NCR, India.

We will count on you to:

• Contribute early to a rapidly evolving field with strong executive backing.
• Experience the excitement of a start-up culture while being backed by a global pioneer in the industry.
• Be part of our strategic tech hub that delivers foundation services and tools to the entire enterprise.
• Embrace a fast-paced, experimental approach with a focus on rapid iteration and a willingness to pivot quicklyadopt a proof-of-concept mindset to drive innovation and efficiency.
• Be able to learn from failures, adapt quickly, and effectively communicate the lessons learned.
• Engage effectively with our counterparts in the Dublin and Cluj AI teams.
• Operationalise and upscale prototype solutions to support large user bases.
• Ensure seamless handover of operationalised services to business technology teams.
• Thrive as a collaborative developer in an Agile environment.
• Embrace a lifelong learning mindset, continuously seeking opportunities for improvement.
• Establish and maintain best practice development frameworks and standards.
• Develop practices and guidelines to improve consistency and reuse of solutions.

Mandatory Skills

What you need to have:

• Minimum 6+ years professional experience building applications.
• Strong proficiency in React (TypeScript preferred). Familiarity with Vue or Angular acceptable.
• Strong server-side experience with Node.js (NestJS or Express). TypeScript experience strongly preferred.
• Practical experience with MongoDB (or other document DBs) and data modeling.
• Familiarity with Python for scripting or ML integration.
• Solid understanding of RESTful APIs and web security best practices.
• Experience with containerization (Docker) and CI/CD pipelines.
• Familiarity with cloud deployments (AWS preferred/Azure) and basic infra-as-code (Terraform/CloudFormation) concepts.
• Familiarity with prompt engineering and integrating LLMs into applications.
• Hands-on problem solver with strong communication skills and ability to own features end-to-end.

Desired Skills

• Production experience with Kubernetes, AWS services (S3, Lambdas, SQS, IAM), or equivalent cloud tooling.
• Experience with document ingestion pipelines and unstructured data storage (PDF/text ingestion, OCR, parsing).
• Experience building Retrieval-Augmented Generation (RAG) solutions and using vector databases (Pinecone, Milvus, Weaviate, FAISS).
• Experience deploying and monitoring LLM-based features: model selection, cost control, rate limiting, caching, observability.
• Familiarity with LLM frameworks/APIs (OpenAI, Anthropic, Llama-family) and embeddings workflows.
• Strong understanding of cloud-native architectures, observability (logs/metrics/tracing), reliability, and cost optimization.

Education & Certifications:

BE/ BTech / BSC /MCA