Available for Freelancing & Architectural Advisory

Let's Build Something High-Performance Together

Providing senior engineering execution across the entire development stack: Backend Microservices (Spring Boot), Frontend Webapps (React.js), Cross-Platform Mobile Apps (React Native), High-Throughput Databases (SQL/NoSQL), Cloud AWS & DevOps, and Real-Time GenAI Voice Agents. Submit your project query below or connect directly via LinkedIn or Gmail.

Connect on LinkedIn
rishabh-sharma-1613b0109
Open Profile
Direct Gmail / Email
rishabh0297@gmail.com
Open Gmail
Interactive Project Dispatcher

Project Scope & Query Generator

Configure your requirements below. You can send the structured brief directly to Gmail or copy it with 1-click to paste into a LinkedIn message.

* No spam, no intermediaries. Your brief opens directly in your chosen channel with Rishabh.

Service Repertoire

What I Bring to Your Team

Senior end-to-end full-stack, mobile, cloud, and backend engineering execution without the full-time overhead.

Backend & Microservices

Architect and build resilient, high-concurrency Spring Boot microservices from scratch. Decouple synchronous bottlenecks with Kafka and RabbitMQ, integrate multi-level Redis caching, and guarantee sub-50ms P99 latency.

  • Spring Boot 3 & Java 21 domain microservices
  • Non-blocking Kafka & RabbitMQ event messaging
  • Multi-level Redis caching & HikariCP pool tuning
  • Idempotent API endpoints & distributed tracing
Spring Boot 3 Java 21 Kafka RabbitMQ Redis

Frontend & Web Applications

Build fluid, responsive, and lightweight React.js web applications with modular component architecture, complex state management, real-time WebSockets, dynamic query builders, and Core Web Vitals optimization.

  • Modular React.js & TypeScript component systems
  • Real-time live dashboards & WebSocket subscriptions
  • Dynamic interactive forms, query builders & validations
  • Performance-tuned DOM rendering & CWV scores
React.js TypeScript Modern CSS WebSockets Next.js

Mobile Apps (iOS & Android)

Engineer 60fps native-feel mobile applications using React Native for iOS and Android from a single unified codebase. Delivering offline-first state persistence, push notifications, native biometrics, and resilient backend sync.

  • Unified iOS & Android cross-platform delivery
  • Offline-first state persistence & background sync
  • Biometric authentication & mobile payment SDKs
  • Smooth 60fps gestures and navigation workflows
React Native iOS / Android State Sync Push Alerts Mobile UX

Database Engineering & Migrations

Enterprise relational and NoSQL database architecture, schema normalization, execution plan analysis (EXPLAIN ANALYZE), composite indexing, and zero-downtime shadow write migrations of 10M+ records with zero data loss.

  • Zero-downtime shadow write migrations (10M+ records)
  • Query execution plan tuning & composite indexing
  • N+1 query elimination & HikariCP pool optimization
  • Multi-model storage: PostgreSQL, MySQL, MongoDB
PostgreSQL MySQL MongoDB Zero Downtime HikariCP

Cloud AWS & DevOps Automation

Multi-cloud infrastructure provisioning across AWS and GCP. Automated multi-stage Docker containerization, Jenkins CI/CD pipelines with quality gates, VPC networking, and cloud FinOps audits cutting $1,000s/mo in waste.

  • Multi-stage hardened Docker container images
  • Automated Jenkins CI/CD pipelines with testing gates
  • AWS EC2, ALB, EKS, RDS, S3 & VPC networking
  • Cloud FinOps right-sizing & monthly cost reduction
AWS Docker Jenkins CI/CD VPC Security FinOps

GenAI & Real-Time Voice Agents

Integrate real-time conversational AI voice agents, low-latency WebRTC bidirectional audio streaming with LiveKit, semantic vector search with pgvector, and background queue coordination with BullMQ directly into your applications.

  • LiveKit low-latency bidirectional voice sessions
  • pgvector high-dimensional embeddings & RAG search
  • Turn-by-turn conversational audio pipelines
  • BullMQ asynchronous task queues & Redis workers
LiveKit Voice pgvector BullMQ OpenAI APIs LangChain

Flexible Engagement Models

Whether you need a dedicated 2-week sprint to resolve a critical scalability blocker, a fixed-scope deliverable for a new microservice or webapp, or fractional architectural advisory, engagements are tailored to your engineering roadmap.

Message on LinkedIn Email Direct