AI Engineer – Full Stack (Python + Node.js)

Zerozilla Infotech Private limited; Bengaluru; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Zerozilla Bengaluru is seeking an experienced AI Engineer with a strong Full Stack Development background to design, build, and deploy production‑ready AI applications using Python, Node.js and TypeScript. You will own end‑to‑end solutions, integrate frontend apps with backend APIs, and implement AI orchestration and deployment workflows.

The role requires hands‑on experience with LLMs, RAG pipelines, LangChain and LangGraph, along with modern backend services in Python and Node.js.

Qualifications

• 4–6 years of software development experience.
• Strong hands-on in Python and Node.js (TypeScript).
• Experience building/ deploying production AI apps with LLMs and RAG pipelines.

Responsibilities

• Design and deploy end‑to‑end AI apps for business use cases.
• Build LLM-powered apps using LangChain, LangGraph, and multi-agent frameworks.
• Develop RAG pipelines with embeddings, semantic search and vector DBs.
• Implement prompts, context handling, tool calling and streaming LLM outputs.
• Create scalable backend APIs with Python and Node.js.
• Integrate Firebase services and frontend with React/TypeScript.
• Ensure secure auth using OAuth2/OIDC, JWT & RBAC.
• Collaborate with product and engineering teams; ship reliably.

Skills

Python

Node.js/TypeScript

LLMs & RAG

LangChain/LangGraph

React frontend

API design

Distributed systems

OAuth2/JWT

Async programming

Education

Bachelor's or Master's in CS/IT/AI

Tools

FastAPI/Flask/Django

NestJS/Express

Firebase services

Docker/Kubernetes

OpenTelemetry/Prometheus

Job description

About the Role

We are looking for an experienced AI Engineer with a strong Full Stack Development background and hands‑on expertise in Python, Node.js and TypeScript. The ideal candidate should have experience building, integrating and deploying production‑ready AI applications using LLMs, Agentic AI, RAG pipelines and scalable backend services.

The candidate should be capable of developing end‑to‑end AI‑powered solutions, integrating frontend applications with backend APIs, and implementing AI orchestration and deployment workflows. Strong hands‑on experience in both Python and Node.js (TypeScript) is essential.

Key Responsibilities

• Design, develop and deploy end-to-end AI-powered applications for business use cases.
• Build LLM-powered applications using LangChain, LangGraph, Agentic AI and multi-agent frameworks.
• Develop RAG pipelines using chunking, embeddings, semantic search, retrieval techniques and vector databases.
• Implement prompt engineering, context engineering, tool/function calling, structured outputs and streaming LLM responses.
• Develop scalable backend APIs using Python (FastAPI/Flask/Django) and Node.js (NestJS/Express).
• Build Node.js/TypeScript services, API gateways, real‑time features and AI integration layers.
• Integrate Firebase services, including Authentication, Cloud Firestore, Realtime Database, Cloud Messaging and Storage.
• Integrate AI capabilities into web applications, enterprise platforms and customer‑facing products.
• Collaborate with frontend teams and contribute to UI development using React, JavaScript and TypeScript.
• Implement secure authentication and authorization using OAuth2/OIDC, JWT and RBAC.
• Deploy, monitor, test and optimize AI applications in production environments.
• Work with databases, messaging systems and cloud platforms to build reliable, scalable applications.
• Troubleshoot performance issues and improve application scalability, security and user experience.
• Collaborate with product, engineering and business teams to deliver robust AI-driven solutions.

Key Performance Indicators

• Successful delivery of production-ready AI-powered applications.
• Quality and performance of LLM, RAG and Agentic AI implementations.
• Scalability and reliability of Python and Node.js backend services.
• Accuracy and response quality of AI-powered features.
• Effective integration of frontend, backend and AI orchestration components.
• Application security, performance optimization and production stability.
• Timely delivery of assigned features and technical milestones.
• Quality of testing, monitoring, documentation and collaboration.

Mandatory Skills

• 4–6 years of overall software development experience.
• Python and Node.js (TypeScript): 4+ years of hands‑on experience in both.
• Python backend development using FastAPI, Flask or Django.
• Node.js development using JavaScript/TypeScript and NestJS or Express.js.
• Hands‑on experience with LLMs, RAG, LangChain and LangGraph.
• Prompt engineering, embeddings, chunking, semantic search and vector databases.
• LLM API integration, tool/function calling and streaming responses.
• Full Stack Development and React exposure.
• REST APIs, microservices and system integration.
• Databases such as PostgreSQL, MySQL, MongoDB or Redis.
• Experience deploying AI applications in production.
• Strong understanding of asynchronous programming and scalable system design.
• Good problem‑solving, communication and teamwork skills.

Good to Have

• Firebase Authentication, Firestore, Realtime Database, FCM and Firebase Storage.
• Vector databases such as Pinecone, FAISS, Weaviate, Chroma or pgvector.
• Cloud platforms: AWS, Azure or GCP.
• Docker, Kubernetes, Git and CI/CD pipelines.
• Messaging systems such as Kafka, RabbitMQ, SQS, Celery or BullMQ.
• MCP (Model Context Protocol) servers and agent tool integrations.
• Unit and integration testing using Jest or Vitest.
• Observability tools such as OpenTelemetry, Prometheus, Grafana or Datadog.
• Experience building conversational AI, copilots, internal AI tools or enterprise GenAI platforms.
• Knowledge of OAuth2/OIDC, JWT, RBAC and OWASP Top 10.

QualificationBachelor’s or Master’s degree in Computer Science, Information Technology, Artificial Intelligence or a related field.

About Zerozilla

Zerozilla is a global software development and digital marketing partner delivering technology and performance‑driven digital marketing solutions to businesses seeking scalable growth. Its broader capabilities span software development, cloud applications, UI/UX, software modernization, technology integrations, digital marketing, website development, SEO, content, graphic design, and video editing.