Java Backend Engineer • 3 Years • Microservices & Event-Driven Architecture

 About Me

My name is Shubham Bhati and I am a Java Backend Engineer specializing in Spring Boot, microservices and event-driven architectures. I build high-throughput, enterprise-grade systems with 3+ years of experience.

• 🔧 Distributed Microservices: Building scalable event-driven architectures utilizing Apache Kafka.
• ⚡ Performance Optimization: Optimizing API latency and caching layers with Redis.
• 🤖 AI Integration: Integrating OpenAI and Gemini APIs for backend automation pipelines.
• 🚀 High-Availability Delivery: Architecting low-latency transactional platforms and secure REST APIs.

 Experience

🔷 MobilePe — Java Spring Boot Developer
_{Fintech & Payment Systems • Jun 2026 - Present • Noida, India}

• ⚡ Kafka Lag & Latency: Cut payment API latency by 35% by offloading synchronous database writes from the Kafka listener thread, tuning consumer concurrency and connection pools to eliminate production backlogs.
• 🏗️ Microservices Architecture: Architected and delivered 3 core production microservices (onboarding-service, payment-service and notification-service) alongside the legacy monolith with backward-compatible endpoints.
• 💳 Multi-Wallet Balance Migration: Led migration of user records and multi-wallet balances (General, Food and NCMC) into the microservices architecture using chunked batch writes and checksum audits with zero balance desync.
• 🚀 UPI PPI & Wallet Ledger: Engineered Mobileware UPI PPI and M2P integrations with custom RSA crypto signing, 5 webhook callbacks, idempotency keys, database locking and a double-entry ledger with hold-then-settle processing.
• 🛡️ KYC Pipelines & Security: Built KYC verification pipelines (Aadhaar, PAN and Syntizen VKYC webhooks) using AES-256-GCM encryption and HMAC-SHA256 blind indexing for fast querying without exposing raw PII.

🔷 AlignBits LLC — Software Engineer
_{Justransform iPaaS Platform • Sep 2024 - May 2026 • Dubai, UAE (Remote)}

• 🏗️ Scale: Designed transformation orchestration engines for logistics iPaaS pipelines handling REST, SFTP and AS2 data protocols across 10+ client pipelines.
• 🤖 AI Automation: Built OpenAI-powered pipeline for automated EDI/JSON validation — **reduced manual debugging by 30%**.
• ⚡ Reliability: Resolved 15+ high-priority production incidents through system debugging and root-cause analysis.
• 📨 Async Processing: Leveraged AWS SQS and RabbitMQ for decoupling event-driven transaction processing at scale.
• 🔐 Security: Migrated microservices from Java 11 to Java 17 and integrated OAuth 2.0 JWT Spring Security.

🔷 IHX Private Limited — Associate Software Engineer
_{Healthcare Claims Processing • Jun 2023 - Aug 2024 • Bengaluru, India}

• 🏥 Healthcare Backend: Built JSON-to-FHIR data transformation engines processing high-frequency healthcare claim records.
• 📈 Query Optimization: Optimized Hibernate ORM mappings and database index keys, improving query latency on core insurer endpoints.
• ✅ Validation Pipelines: Developed multi-layer validation pipelines and custom exception-handling frameworks.

🛠️  Tech Stack

Java	Spring Boot	Spring Security	Hibernate	REST APIs
Apache Kafka	Redis	RabbitMQ	AWS SQS	PostgreSQL
MySQL	MongoDB	OpenAI API	Gemini API	Docker
Git	JUnit 5	Postman	Python	Bash

📊  GitHub Stats

✍️  Recent Blog Posts

🔷  Preventing Cache Penetration in Spring Boot Using Redis and Bloom Filters 📅 Sep 02, 2026	🔷  Scaling Kafka Consumers in Spring Boot: How We Cut Lag and Saved Latency 📅 Sep 01, 2026
🔷  Scaling Event-Driven Microservices: Kafka Lag, Redis Idempotency and Transactional Outbox 📅 Aug 25, 2026	🔷  10 Essential Microservices Design Patterns for Java Engineers in 2026 📅 Aug 24, 2026
🔷  Java Stream API Cheatsheet: 20 Patterns Every Backend Dev Must Know 📅 Aug 23, 2026	🔷  Java Stream API Cheatsheet: 20 Patterns Every Backend Dev Must Know 📅 Aug 22, 2026

📬  Let's Connect