Lead Software Developer · Technical Lead · Product Owner

Building scalable software from architecture to production.

I design, build and lead high-impact software products across backend engineering, cloud infrastructure, EV charging systems, IoT platforms, AI-powered applications and modern web platforms. My work also includes AI integration, model training and fine-tuning, efficient data labeling pipelines, inference invocation and optimization, LLM-based automation, RAG systems, AI agents, and cloud-based AI deployments. I focus on integrating AI into real-world products in a scalable, reliable and cost-efficient way—from preparing and labeling data to training models, serving inference APIs and deploying production-ready AI workflows.

Based in Bangalore, India
Focus Backend · Cloud · Product
Experience since 2015
Portrait of Sandip Debnath
Core strength System Architecture
Cloud AWS · Azure
About me

Can-do mindset. Product thinking. Strong execution.

“Happy client means better growth & get quality things done in time.”

I am a team player and lead software engineer with a can-do & shall-find-a-way attitude, strong time-management skills and a clear focus on the end goal. My work spans product architecture, backend engineering, cloud systems, team leadership and delivery.

10+ Years building software
5 Organizations across my journey
Cloud AWS, Azure & DigitalOcean
Full Stack Backend, frontend, DevOps & QA
Career timeline

My work experience, one milestone at a time.

A visual timeline inspired by the reference you shared, adapted into a clean, responsive portfolio experience.

Technical leadership
Jan 2023 — Present

Terra Group

Technical Lead & Product Owner · Kolkata / Gurgaon

Leading product architecture, system design, cloud infrastructure planning and engineering delivery across EV charging, IoT and web/mobile platforms.

PythonDjangoFastAPINode.js React.jsAWSIoTOCPP
5
Senior engineering
Nov 2019 — Jun 2022

Rakuten India Enterprise Pvt. Ltd.

Senior Software Engineer II · Bengaluru

Rebuilt legacy functionality, designed new products end-to-end, worked on system architecture, cloud services and high-quality team delivery.

PythonPHPDjangoFlask LaravelReact.jsAWSAzure
4
Platform engineering
Aug 2018 — Nov 2019

Loktra Technologies Pvt. Ltd.

Software Engineer · Bengaluru

Managed interns and owned backend systems for lead management, field-agent geo tracking, attendance, reporting and admin applications.

PythonFlaskJavaScriptDigitalOcean
3
Team & client delivery
Jun 2017 — Aug 2018

Zestech Global Pvt. Ltd.

Software Engineer · Bengaluru

Managed a small engineering team, handled client requirements and onsite support, and built an e-learning platform with streaming, attendance and online evaluation capabilities.

Team LeadershipE-learningVideoEvaluation
2
Foundation
Aug 2015 — May 2017

Hill Innovations Pvt. Ltd.

Software Engineer · Bengaluru

Started my professional journey by translating business requirements into software, building an end-to-end shopping platform and creating internal tools for warehouse management.

OpenCartE-commerceInternal ToolsBusiness Systems
1
Technical expertise

A broad engineering toolkit with backend depth.

Backend Engineering

PythonDjangoFlaskFastAPI PHPLaravelCodeIgniterNode.js

Frontend

React.jsJavaScriptHTMLCSS BootstrapMaterial Frameworks

Databases

PostgreSQLMySQLMongoDBCassandra DynamoDBRedis

Cloud & DevOps

AWSAzureDigitalOceanDocker EC2ELBS3RDSLambda FargateRoute 53CI/CDBedrock

QA & Performance

JMeterSelenium with PythonSystem Testing

Leadership & Product

System ArchitectureProduct PlanningStakeholder Management Team LeadershipDelivery Management
Selected engineering projects

Projects I have architected, built and delivered.

A selection of platforms spanning EV charging, interoperability, IoT telemetry, AI automation and algorithmic market systems.

PROJECT 01 · SCREENSHOT PLACEHOLDER OCPP Server / CSMS
01
EV Charging · CSMS

OCPP Server / CSMS

Asynchronous charger-control platform for operating EV charging infrastructure, managing charger communication, sessions, commands and real-time device events.

Python · aiohttp · OCPP · AsyncIO
PROJECT 02 · SCREENSHOT PLACEHOLDER OCPI Interoperability Platform
02
Interoperability · APIs

OCPI Interoperability Platform

OCPI backend enabling charging-network interoperability, partner integrations, location and EVSE synchronization, sessions, commands and charging transaction flows.

Python · Django · OCPI 2.2 · REST APIs
PROJECT 04 · SCREENSHOT PLACEHOLDER MQTT IoT Backend
04
IoT · Messaging

MQTT IoT Backend

Event-driven backend for smart sockets, telematics devices and other connected hardware, handling device messages, commands and state updates through MQTT.

Python · Flask · MQTT · IoT
PROJECT 05 · SCREENSHOT PLACEHOLDER AI Engineering Agents
05
AI · Automation

AI Engineering Agents

AI-assisted engineering and operations workflows designed to analyze application context, automate repetitive technical tasks and improve developer productivity.

Python · AWS Bedrock · LLMs · Automation
PROJECT 06 · SCREENSHOT PLACEHOLDER Algorithmic Trading Bots
06
Trading · Automation

Algorithmic Trading Bots

Automated trading systems consuming live WebSocket feeds, generating strategy signals, placing orders and managing positions with dynamic stop-loss and trailing-profit logic.

Python · WebSockets · Kite Connect · Trading Automation
PROJECT 07 · SCREENSHOT PLACEHOLDER Market Analysis & Backtesting P...
07
Markets · Backtesting

Market Analysis & Backtesting Platform

Historical and live market-analysis tooling for candle replay, strategy backtesting, momentum evaluation and analysis of price, volume and open-interest behaviour.

Python · Pandas · Backtesting · OHLC · Volume · OI
PROJECT 08 · SCREENSHOT PLACEHOLDER EV Charging Backend APIs
08
EV Charging · Backend

EV Charging Backend APIs

Backend APIs powering web, Android and iOS charging experiences, including charger operations, users, sessions, payments and application-facing business workflows.

Django · REST API · Python · Redis
PROJECT 09 · SCREENSHOT PLACEHOLDER Operations & Analytics Dashboard
09
Analytics · Operations

Operations & Analytics Dashboard

Web dashboards for customers and operations teams to monitor infrastructure, inspect operational data, analyze system activity and manage platform workflows.

React.js · Django · PostgreSQL · AWS
PROJECT 10 · SCREENSHOT PLACEHOLDER Charging, Fleet & Partner Appli...
10
Mobile · Fleet

Charging, Fleet & Partner Applications

Web and mobile experiences for EV charging, driver duty workflows, delivery tracking, partner operations and vehicle fleet management across multiple application surfaces.

React.js · KMM · Swift · Kotlin · Mobile Web
Let’s connect

Have a product, platform or engineering challenge?

I enjoy solving complex software problems, designing scalable systems and helping teams ship quality products.