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Node.js Architect

Company
Company Happiest Minds Technologies
Type
Opportunity Type Full-Time Job
Salary
Stipend / Salary Competitive Package (Best in Industry)
Location
Location Bengaluru, India
Posted Date
Posted Date Today
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Technical architecture Architectural design Technical Node.js Design Architecture
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Aptitude Practice Questions & Mock Tests Open Resource ↗
Curated logical, quantitative, and verbal reasoning problems for the initial online screening round.
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Company-Specific Interview Preparation Corner Open Resource ↗
Detailed interview experiences, exam formats, and previous test questions for Happiest Minds Technologies and tech roles.
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Technical Placement Cheat Sheets & Question Bank Open Resource ↗
High-yield coding cheat sheets, core CS fundamentals (OOP, DBMS, OS, Networks), and rapid revision guides.
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Algorithm, DSA & Live Code Debugger Practice Open Resource ↗
Hands-on problem sets to improve coding speed and step-by-step memory debugging.

Experience: 14-18 Yrs. Open to matching qualifications.

1
Online Assessment / Technical Interview Rounds / HR Review
Node.js Architect (GenAI / Agentic AI Focus) Location: Bengaluru Job Summary We are looking for an experienced Node.js Architect to lead the design and development of scalable, high-performance, secure, and cloud-native applications. The ideal candidate should have strong expertise in Node.js, TypeScript, microservices architecture, distributed systems, API development, cloud technologies, and Agentic AI frameworks such as LangChain and LangGraph . Python is not mandatory , however candidates must have hands-on experience building AI-powered applications using LangChain, LangGraph, LLM integrations, AI agents, RAG architectures, and orchestration frameworks . The architect will be responsible for defining architectural standards, driving technology decisions, and leading engineering teams in delivering enterprise-grade solutions. Key Responsibilities Define and drive end-to-end application architecture using Node.js, TypeScript, and modern backend technologies . Design and develop scalable, resilient, and high-performance applications using microservices and event-driven architectures . Architect and govern RESTful APIs, GraphQL APIs, and enterprise integration solutions . Design and implement Agentic AI solutions using LangChain, LangGraph, LLMs, AI Agents, and RAG frameworks . Lead architecture decisions for AI-enabled applications, including orchestration, memory management, tool integrations, and workflow automation. Drive technology selection, code reviews, architecture governance, and engineering best practices. Design asynchronous processing, messaging, caching, and distributed systems solutions. Lead cloud-native application modernization, deployment, scalability, and reliability initiatives. Ensure application security, performance optimization, maintainability, and high availability. Collaborate with product managers, business stakeholders, DevOps, and engineering teams to translate business requirements into technical solutions. Mentor senior engineers and technical leads while establishing coding standards and architecture frameworks. Required Technical Skills Core Backend & Architecture Strong expertise in Node.js, JavaScript (ES6+), and TypeScript . Hands-on experience with Express.js, NestJS, Fastify , or similar Node.js frameworks. Extensive experience in Microservices Architecture, Distributed Systems, Design Patterns, Domain-Driven Design (DDD), and Event-Driven Architecture . Strong expertise in REST APIs, GraphQL, API Security, Authentication & Authorization . Experience with API Gateways and enterprise integration patterns. Strong understanding of Scalable System Design and Performance Engineering . Agentic AI & GenAI (Mandatory) Hands-on experience with LangChain and LangGraph . Experience building AI Agents, Multi-Agent Systems, Agent Orchestration, and Autonomous Workflows . Experience integrating LLMs such as OpenAI, Azure OpenAI, Claude, Gemini, or open-source models. Strong understanding of RAG (Retrieval-Augmented Generation) architectures. Experience with Prompt Engineering, Context Management, Memory Frameworks, Tool Calling, and Function Calling . Experience integrating AI applications with vector databases such as Pinecone, Weaviate, Chroma, FAISS, or Azure AI Search . Cloud & DevOps Experience with cloud platforms such as Azure, AWS, or GCP . Strong understanding of Docker, Kubernetes, CI/CD Pipelines, Infrastructure as Code, and Cloud-Native Architectures . Experience with observability tools, logging, monitoring, distributed tracing, and production support. Data & Messaging Experience with PostgreSQL, MySQL, MongoDB, Redis , or other relational/NoSQL databases. Knowledge of messaging technologies such as Kafka, RabbitMQ, Azure Service Bus, AWS SQS/SNS , or equivalent. Security Strong understanding of OAuth 2.0, JWT, OWASP Top 10, Secure Coding Practices, and Enterprise Security Standards . Preferred Skills Exposure to Python-based AI ecosystems (preferred but not mandatory). Experience with Azure AI Services, Azure OpenAI, AWS Bedrock, or Google Vertex AI . Experience building enterprise-grade Agentic AI platforms . Knowledge of MCP (Model Context Protocol) , Tool Integration Frameworks, and AI Governance. Experience with enterprise application modernization and digital transformation programs. Understanding of CQRS, Event Sourcing, and Serverless Architectures . Strong stakeholder management and technical leadership capabilities. Candidate Profile 12+ years of software engineering experience with significant expertise in Node.js architecture and enterprise application design . Proven experience designing and delivering large-scale, cloud-native applications. Hands-on experience with LangChain and LangGraph is mandatory . Strong experience in GenAI, AI Agents, Multi-Agent Systems, and LLM-based application development . Ability to balance hands-on technical leadership with architecture strategy and governance. Strong problem-solving, communication, and stakeholder management skills. Proven ability to lead engineering teams and drive technical decisions aligned with business objectives.

Happiest Minds Technologies — Software Engineering & Full Stack Interview Guide

Previously asked questions, exam syllabus, coding benchmarks & round strategy.

APTITUDE & LOGIC 📖
Aptitude Practice Questions & Online Mock Tests

Curated logical, quantitative, and verbal reasoning problems to sharpen reasoning skills required for the initial screening test.

Open Resource ↗
COMPANY GUIDE 🎯
Happiest Minds Technologies Interview Preparation Corner

Comprehensive guide covering typical interview formats, common questions, and preparation tips for Happiest Minds Technologies and off-campus tech roles.

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MOCK TESTS & PAPERS 📝
Comprehensive Interview Prep Resources & Syllabus

Collection of previous year questions, company-specific test patterns, and interview experiences for technical and HR rounds.

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CODING PRACTICE 💻
Algorithm and Data Structure Problem Set

Practice problems to improve coding proficiency and algorithm problem-solving speed for technical rounds.

Open Resource ↗
Round 1: Online Assessment (OA)
Aptitude, Quantitative Logic & 2 Coding Problems
Focus on accuracy and speed. Practice arrays, strings, and standard arithmetic puzzles.
Round 2: Technical Interview 1
Core Tech Stack (Technical architecture, Architectural design, Technical, Node.js, Design, Architecture) & Live Code Tracing
Explain your thought process aloud. Analyze time & space complexities before coding.
Round 3: System Design & Problem Solving
Database Schemas, APIs & Architecture Basics
Clarify edge cases, diagram schemas cleanly, and discuss scalability trade-offs.
Round 4: HR & Cultural Fit Discussion
Happiest Minds Technologies Core Values, Learning Agility & Offer Terms
Demonstrate passion, strong communication, and readiness for full-time collaboration.
Explain OOP (Object-Oriented Programming) principles with real-world examples in Technical architecture. Answer ▼
Model Answer: 1. Encapsulation (data hiding via private fields/getters). 2. Abstraction (hiding implementation complexity). 3. Inheritance (code reusability). 4. Polymorphism (method overriding/overloading).
What is the time and space complexity of QuickSort vs MergeSort? Answer ▼
Model Answer: QuickSort: Average O(N log N) time, O(log N) space. Worst O(N^2). MergeSort: Guaranteed O(N log N) time, but requires O(N) auxiliary space.
Explain the difference between SQL Indexing (B-Tree vs Hash) and when not to use an index. Answer ▼
Model Answer: Indexes speed up SELECT queries via B-Trees. However, they slow down INSERT, UPDATE, and DELETE operations because indexes must be updated on disk. Avoid on low-cardinality columns (e.g., boolean flags).
What happens under the hood when you enter a URL in a browser? Answer ▼
Model Answer: 1. DNS lookup (resolves IP). 2. TCP 3-way handshake (SYN, SYN-ACK, ACK). 3. TLS negotiation for HTTPS. 4. HTTP GET request sent. 5. Server responds with HTML/CSS/JS. 6. Browser renders DOM & CSSOM tree.
What is the difference between REST and GraphQL APIs? Answer ▼
Model Answer: REST uses multiple fixed endpoints with possible over/under-fetching. GraphQL uses a single endpoint allowing clients to query exact fields in a single request.
Why do you want to join Happiest Minds Technologies as a Node.js Architect?
Preparation Tip: Highlight Happiest Minds Technologies's market reputation, recent tech innovations, and how your skills in Technical architecture directly solve their team's objectives.
Describe a challenging bug or academic project roadblock and how you resolved it.
Preparation Tip: Use the STAR method: Situation (project context), Task (what needed solving), Action (specific tools/logic applied), Result (quantifiable positive outcome).
How do you handle strict deadlines or sudden scope changes?
Preparation Tip: Explain your prioritization strategy, proactive communication with mentors/peers, and agile mindset.

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