Gutti Narendra

Software Engineering · Backend · Quality Engineering

View My Work → Contact Me ↗

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02

My Projects

Scalable, distributed systems built with high reliability and performance

01 / FINTECH INFRASTRUCTURE

Payment & Wallet System

Designed a backend payment and digital wallet system using Node.js, REST APIs, and PostgreSQL for transaction processing, wallet balances, and transaction history.

                                ⚡
                                Built an event-driven architecture using Apache Kafka and the Saga pattern
                            

                                🔒
                                Implemented idempotency to eliminate duplicate transactions during retries
                            

                                ☁️
                                Deployed with Redis caching, Docker containerization, and AWS infrastructure
                            

Node.js Express.js Kafka Redis PostgreSQL Docker AWS

1

Client Gateway Validates idempotency key in Redis cache

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2

Kafka Event Broker Emits to wallet.transactions topic

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3

Saga Orchestrator Executes debit & credit with compensating rollbacks

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4

PostgreSQL Ledger ACID compliant double-entry ledger update

02 / DISTRIBUTED COMPUTING

Scalable Job Scheduler

Built a scalable job scheduling platform using Node.js and BullMQ to manage asynchronous jobs through distributed queues and background worker pools.

                                📋
                                Supports concurrent, delayed, and recurring cron-style jobs
                            

                                🔁
                                Automated retry and failure handling with Redis and PostgreSQL
                            

                                📦
                                Docker and Kubernetes deployment for horizontal scaling and fault tolerance
                            

Node.js BullMQ Redis PostgreSQL Docker Kubernetes

1

Job Producer Enqueues delayed, recurring, or instant payload

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BullMQ + Redis Priority sorting & distributed queue lock management

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3

Worker Pods (K8s) Auto-scaled consumer cluster processing tasks in parallel

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4

DLQ & Telemetry Dead-letter queue logging on exponential backoff failure

03

Contact Me

Let's connect — open for software engineering, QA, and backend roles

Whether you have an opportunity to discuss, a project in mind, or just want to connect, feel free to reach out directly or send a message.