Hi, I'm Sumit Kumar Mallick

Senior Development Engineer - III
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What I Do

🏗️ Backend Systems Architect building distributed microservices with Java Spring Boot, Python FastAPI, and AWS cloud infrastructure that power enterprise applications serving millions of users daily.

🎯 99.9% Uptime ⚡ 10M+ API Calls/Day � Microservices Architect ☁️ Multi-Cloud Expert
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More about me

5+

Years Experience

1M+

Users Onboarded

127

Cups of Coffee ☕

🎯 Senior Development Engineer - III with expertise in distributed systems, developer platforms, and AI-integrated backends. Currently at Hypersonix.ai, building ProfitGPT - an LLM-based intelligence agent serving enterprise clients like Amazon and Coupang.

⚡ I specialize in designing fault-tolerant microservices, data-driven automation, and observability frameworks that serve billions of events daily. Notable projects include WhisperVault, Sayvero.com, and Loch.one.

📍 Bengaluru, KA, India | 📞 7063760250

📧 mallicksumit546@gmail.com

TOP EXPERTISE

Expert in Distributed Systems (REST API, gRPC) with Java (Spring) and Python (FastAPI, Flask): Download Resume

  • Java (Spring Boot)
  • Python (FastAPI, Flask)
  • JavaScript/TypeScript
  • Go (working knowledge)
  • Node.js/NestJS
  • AWS (EKS, Lambda, S3)
  • Kubernetes
  • Terraform
  • Docker
  • Kafka
  • PostgreSQL/MongoDB
  • DynamoDB
  • Airflow
  • Prometheus/Grafana
  • Datadog/ELK

Professional Experience

Hypersonix.ai — Software Development Engineer III

May 2024 – Present, Bengaluru

  • Spearheaded backend design for ProfitGPT, an LLM-based intelligence agent integrating multi-cloud data pipelines across AWS, Snowflake, and Databricks, serving enterprise clients like Amazon and Coupang
  • Built distributed data orchestration framework using Airflow, async Python jobs, DynamoDB, AWS Lambda - reducing job execution latency by 40%
  • Designed self-healing observability dashboards with React, MLflow, and TypeScript APIs, improving RCA resolution speed by 30%
  • Defined and deployed IaC automation using Terraform and Serverless - cutting provisioning overhead by 60%

ShopSe — Software Development Engineer II

Sep 2022 – May 2024, Bengaluru

  • Architected distributed, event-driven microservices with Java Spring Boot and Python Flask, driving a 30% boost in concurrent transactions
  • Built Kafka-based event streaming for payments and risk engines, enabling asynchronous workflows for transaction validation
  • Integrated major BaaS connectors (Apple Pay, Vivo, MSI, Oppo) to onboard over 1 million active users
  • Enhanced DevOps pipeline migrating from Jenkins to GitHub Actions, achieving 40% faster deployment velocity

Avataar.ai — Software Development Engineer II

Jun 2020 – Sep 2022, Bengaluru

  • Delivered large-scale backend APIs supporting AR/VR experiences using Node.js, Python Flask, and AWS Lambda + EC2
  • Refactored legacy sync workflows into async event queues with Kafka + Celery, boosting throughput by 50%
  • Optimized MySQL and MongoDB query indexes, delivering a 22% reduction in response times
  • Implemented multi-region failover architecture, improving SLA from 79.7% to 97.9%

Embibe — Software Development Engineer I

Jul 2019 – Jun 2020, Mumbai

  • Built REST and batch processing APIs in Spring Boot and Flask supporting 10M+ learning events
  • Designed automated ECS/Jenkins CI/CD pipelines, cutting deployment time by 30%
  • Implemented request queuing and database optimization, improving query throughput by 18%

🏆 Featured Projects

Building the future, one line of code at a time

🤐
🔥 Live

WhisperVault

Anonymous confession sharing platform with JWT authentication, moderation system, and real-time updates built with modern cloud architecture

Next.js FastAPI PostgreSQL Docker AWS ECS Terraform
📋 Code 🔗 Live Demo
💬
✨ Enterprise

Sayvero.com

Enterprise-grade communication and collaboration platform with advanced analytics and real-time messaging capabilities

React Node.js Python AWS Microservices
🔗 Live Demo
📊
🚀 AI-Powered

Loch.one

Innovative data analytics and visualization platform with AI-powered insights and multi-cloud integration

Python FastAPI React AWS ML
🔗 Live Demo
🤖
🏢 Enterprise

ProfitGPT (Hypersonix.ai)

LLM-based intelligence agent with multi-cloud data pipelines serving enterprise clients like Amazon and Coupang

Python AWS Snowflake Databricks Airflow MLflow
40% Latency Reduction
60% Cost Savings

Let's Connect 🚀

Have a project in mind? Want to collaborate? Or just want to say hello?

📧 Get In Touch

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☕ Support My Work

If you found my projects helpful or just want to support my open-source work, consider buying me a coffee! It helps keep me caffeinated while coding. 😊

☕ Buy Me a Coffee 💝 GitHub Sponsor
127
Cups of Coffee
42
Projects Completed
∞
Lines of Code

🌐 Connect With Me

Let's build something amazing together!

🎉 Thanks for visiting! Feel free to explore my projects and don't hesitate to reach out for collaborations or just a friendly chat about technology!