PRINCIPAL ARCHITECT - Java

Happiest Minds Technologies; Bengaluru; On-site; INR 2,400,000 - 3,400,000; Full time

Job summary

Happiest Minds Technologies in Bengaluru invites an experienced Java Full Stack Architect to own end-to-end architecture for enterprise-scale solutions. You will drive technology decisions across Java backend, frontend, cloud, microservices and AI components, mentoring teams and delivering scalable platforms.

You will design and guide implementations of Java/Spring Boot microservices, React/Angular frontends, AI/GenAI-enabled features and robust security, performance, and observability across

Qualifications

• Proven experience building Java/Spring Boot microservices and REST APIs.
• Strong frontend architectural skills with React or Angular.
• Experience with Generative AI, LLMs, and AI integrations.
• Experience with AWS/Azure/GCP and container technologies.

Responsibilities

• Define and own end-to-end application architecture across frontend, backend, APIs, databases, cloud and AI components.
• Design scalable Java/Spring Boot microservices and RESTful APIs.
• Lead frontend architecture using React/Angular, JavaScript and TypeScript.
• Design and implement AI/GenAI-enabled enterprise applications and features.
• Identify opportunities to leverage LLMs, RAG, AI agents within business apps.
• Integrate enterprise apps with LLM/GenAI APIs and AI platforms.
• Drive security, performance, scalability, observability and reliability.
• Provide hands-on technical leadership, architecture reviews and code/design reviews.
• Mentor senior developers and architects and establish engineering best practices.

Skills

Java 11/17/21+

Spring Boot / Spring Framework

Spring Security

Microservices Architecture

REST APIs / API Design

Hibernate / JPA

Kafka / messaging

React / Angular

JavaScript / TypeScript

AI / GenAI integrations

AWS / Azure / GCP

Docker / Kubernetes

Git

Tools

Docker

Kubernetes

Git

Cloud platforms

Job description

Role Summary

We are looking for an experienced Java Full Stack Architect with strong expertise in Java backend, modern frontend technologies, cloud, microservices and AI/GenAI. The candidate will own end-to-end architecture, drive technology decisions, build scalable enterprise solutions and provide technical leadership to engineering teams.

Key Responsibilities

• Define and own end-to-end application architecture across frontend, backend, APIs, databases, cloud and AI components.
• Design scalable Java/Spring Boot microservices and RESTful APIs.
• Lead frontend architecture using React/Angular, JavaScript and TypeScript.
• Design and implement AI/GenAI-enabled enterprise applications and features.
• Identify opportunities to leverage LLMs, RAG, AI agents and intelligent automation within business applications.
• Integrate enterprise applications with LLM/GenAI APIs and AI platforms.
• Drive security, performance, scalability, observability and reliability.
• Provide hands-on technical leadership, architecture reviews and code/design reviews.
• Mentor senior developers and architects and establish engineering best practices.
• Collaborate with product, business, engineering, DevOps and data teams to translate requirements into technical solutions.

Mandatory Skills

Java / Backend

• Java 11/17/21+
• Spring Boot / Spring Framework
• Spring Security
• Microservices Architecture
• REST APIs / API Design
• Hibernate / JPA
• Kafka or equivalent messaging technology

Frontend

• React or Angular ? strong hands-on expertise
• JavaScript / TypeScript
• HTML5 / CSS3
• Frontend architecture and design patterns
• Responsive UI development

AI / GenAI ? Mandatory

• Strong understanding of Generative AI and LLMs
• Experience integrating OpenAI, Azure OpenAI, Gemini, Claude or equivalent LLM APIs
• RAG architecture and vector databases
• Prompt engineering and LLM application development
• AI agents / Agentic AI concepts
• AI-powered automation and enterprise use cases
• Understanding of AI security, governance, responsible AI and data privacy
• Experience integrating AI capabilities into Java/full-stack applications

Architecture & Cloud

• Enterprise Application Architecture
• System Design / Distributed Systems
• Design Patterns / SOLID
• AWS / Azure / GCP
• Docker / Kubernetes
• CI/CD and DevSecOps
• Git

Database

• Strong SQL expertise
• Oracle / PostgreSQL / MySQL
• MongoDB or other NoSQL technologies

Leadership

• Technical leadership of engineering teams
• Architecture and design governance
• Mentoring and technical coaching
• Strong communication and stakeholder management