ROMHARSHANARCHITECTURE • AI • CLOUD
ROMHARSHAN SINGH

Architecture built from 20+ years of delivery.

Senior Solution Architect and Full Stack Technology Leader working across AI, cloud, distributed systems, Java, Node.js, React, Angular and production engineering.

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Solution ArchitectureAI & CloudFull StackTechnical Mentorship
Romharshan Singh, Senior Solution Architect and technology mentor
Romharshan SinghSenior Solution Architect • AI & Cloud Mentor
20+Years in software engineering & architecture
15+Years working with Java & MySQL
9+Years with Node.js
5+Years with Kafka & event-driven systems
EXPERTISE

Architecture across the full technology stack.

I combine hands-on engineering depth with system design, reliability, cloud, data and AI architecture.

Solution Architecture

HLD/LLD, domain boundaries, API contracts, NFRs, scalability, security, reliability and technology strategy.

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Generative AI & RAG

Enterprise RAG, LLM integration, vector search, AI assistants, voice workflows, evaluation and production controls.

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Cloud & Platform

AWS, Azure, Docker, Kubernetes, K3s, Helm, CI/CD, observability and production deployment architecture.

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Distributed Systems

Microservices, Kafka, API gateways, service discovery, outbox, idempotency, saga, circuit breakers and backpressure.

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Backend Engineering

Java, Spring Boot, Node.js, NestJS, Python, REST/GraphQL APIs, MySQL, PostgreSQL, MongoDB and Redis.

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Frontend Architecture

React, Next.js, Angular, React Native, NX, micro-frontends, performance and maintainable UI platforms.

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SELECTED WORK

Enterprise systems across AI, travel, retail, BFSI and real-time operations.

Public case studies are written to explain architecture and outcomes without exposing proprietary implementation details.

Automotive AI • Yard Management • Smart Mobility

AI-Powered Enterprise Yard Management Platform

Architecture for real-time vehicle identification, movement tracking, yard monitoring, reconciliation and violation detection using AI, Computer Vision, Radar Fusion, IoT and event streaming.

Designed the cloud-native microservices, Kafka event flows, Kubernetes/K3s deployment model, Helm packaging, geospatial persistence and observability approach.NestJS • React • Next.js • Python • PostgreSQL/PostGIS • Kafka • Redis • Kubernetes/K3s • Helm • Prometheus • Grafana • Loki
Travel • Booking • Payments • AI Assistance

Omni-Channel Travel Booking Platform

High-traffic booking architecture spanning flights, hotels, insurance, visa, forex and cars with more than ten third-party integrations, payments, notifications and AI assistance.

Service decomposition, Redis caching and Kafka tuning contributed to approximately 30% lower booking latency.Java • Spring Boot • NestJS • React • Angular • Kafka • MySQL • MongoDB • Redis • AWS • Kubernetes • Kong
Retail • Master Data • Data Engineering

Product & Location Data Integration Platform

Centralized product and location data with Spring Boot services publishing domain events to Kafka, orchestration through Airflow and analytical ingestion into Snowflake.

Improved synchronization from hours to minutes; monitoring and ServiceNow integration reduced MTTR by about 40%.Java • Spring Boot • Kafka • Airflow • Snowflake • AWS • Splunk • ServiceNow
Procurement • Vendor Management • Enterprise Integration

Enterprise Procurement & E-Auction Platform

Modernized procurement, RFX and auction workflows using microservices, API integration and cloud services while connecting with enterprise systems.

Focused on modular service boundaries, SAP integration, API strategy and cloud-ready architecture.Java • Node.js • React • GraphQL • Microservices • SAP Integration • Azure • AWS
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TECHNOLOGY

Polyglot by design, not by buzzword.

Technology choices are selected around workload, reliability, team capability and long-term maintainability.

Backend

JavaSpring BootNode.jsNestJSPythonFastAPIRESTGraphQL

Frontend

ReactNext.jsAngularReact NativeNXPrimeNGPrimeReactMicro-frontends

Data

MySQLMongoDBPostgreSQLPostGISRedisSnowflakeElasticsearch/OpenSearch

AI / ML

OpenAI APIsRAGLangChainFAISSQdrantWhisperYOLOComputer VisionRadar Fusion

Streaming & Integration

Apache KafkaWebSocketWebRTCAirflowSparkAPI GatewayService Discovery

Cloud & DevOps

AWSAzureGCPDockerKubernetesK3sHelmTerraformJenkinsNginx

Observability & ITSM

PrometheusGrafanaLokiSplunkELKServiceNowJMeter
RECOGNITION

Professional recognition built over a long engineering career.

Tech Mahindra – Reliance Account

Employee of the Year

Professional recognition for contribution and performance on an enterprise account.

Euclid Infotech

Best Performer – Website Development

Awarded for website development performance during 2008–09.

Euclid Infotech

Web Developer of the Year

Recognition for web development excellence during 2009–10.

HT Media Ltd. & Tendersinfo.com

Development & Launch Recognition

Recognition connected with development and launch of a tendering solution.

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LEARN

Architecture, AI, cloud and engineering knowledge.

Practical writing for engineers who want to understand production trade-offs, not only framework APIs.

Distributed Systems

Kafka Backpressure in Production NestJS Systems

How to control concurrency, protect dependencies and recover safely when Kafka can deliver faster than your application can process.

2026-08-15Career & Mentoring

Developer to Solution Architect: A Practical Roadmap

A hands-on roadmap for moving from feature delivery to architecture ownership, trade-off analysis and technical leadership.

2026-08-15AI Architecture

How I Approach Production RAG Architecture

The retrieval, security, evaluation, latency and observability decisions that matter after the proof of concept.

2026-08-15Backend Architecture

Spring Boot vs NestJS for Enterprise Services

How I choose between Java/Spring Boot and Node.js/NestJS based on workload, team, ecosystem and operational constraints.

2026-08-15
MENTORSHIP

Move from knowing frameworks to making architecture decisions.

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