Open to new opportunities

Sanjeet Biswas

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Senior Software Developer and Portal Development Lead with 8+ years of experience architecting scalable, secure enterprise web platforms for global telecom and finance clients. I turn complex requirements into reliable, high-performance solutions — from architecture and proofs of concept to delivery and optimization.

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8+Years of Experience
GlobalEnterprise Clients
10+Projects & PoCs Delivered
01

About & Skills

Work Experience

Senior Software Developer @ Netcracker Technology

June 2022 – Present

Lead portal development for a global telecom product organization, delivering scalable, secure web platforms with Java 8+, Angular 2, the Liferay framework, PostgreSQL and WildFly. I own solutions end to end — from requirement analysis and architecture through implementation, performance optimization and deployment — while mentoring the development team and ensuring consistent, high-quality delivery.

Client
  • Rakuten Group, Inc. — a Japanese technology conglomerate based in Tokyo.
Projects
  • 'Self-Service Portal' for e-commerce purchases.
  • 'Ecare' for dashboard management.
  • 'POS' portal for shop representatives.
Key Responsibilities
  • Analyze new requirements, assess feasibility, and lead proofs of concept and effort estimation.
  • Align technical solutions with cross-component teams and Solution Architects.
  • Review change request designs with Business Analysts and implement major changes with thorough developer testing.
  • Track, triage and resolve defects across the portal, and manage Managed Services (MS) issues.
  • Lead and mentor the portal development team, assigning requirements and defects.
  • Analyze load-testing results to drive performance optimization and delivery planning.
Security Engineering
  • Implemented cookie signing to secure session management.
  • Introduced API request signing to prevent tampering and replay attacks.
  • Implemented HTTP Strict Transport Security (HSTS) to enforce HTTPS and prevent protocol-downgrade attacks.
Java 8+Angular 2Liferay 7.4.3Wildfly 23PostgreSQL

Software Developer @ IBM India Pvt. Ltd.

Mar 2017 – May 2022

Spent five years as a Java Developer building and maintaining enterprise applications for a European government client. Gained deep, hands-on experience across the full Java stack — web services, ORM frameworks, XML processing and relational databases — while delivering production features and resolving defects in a large-scale system.

Client
  • Federal Public Service Finance, Belgium.
Project
  • EMCS — Excise Movement Control System.
Core JavaDDL · DML · TCLOracle WebLogicOracleIBM DB2MongoDBMySQLJPA · HibernateJSPJAX-B · SAX · STAX · DOMJAX-WS · SOAPRESTful APISOAP UIWinSCP · PuttyLog4j
02

R&D · Innovations · PoCs

Netcracker Technology — Rakuten Project

Single Sign-On between Netcracker & Rakuten E-commerce Portal

Designed and implemented Single Sign-On to give users seamless access across platforms with a single login, using secure token-based authentication and session management. The integration strengthened security, improved the user experience and removed the need for multiple credentials.

Added Multi-Factor Authentication to protect sensitive flows.

SSO Token/CookieOTP via Phone/Email

Universal Links for Android & iOS

Implemented Universal Links so web URLs open directly in the native app instead of a browser — launching the Rakuten mobile app when installed and gracefully falling back to the browser otherwise, for a consistent cross-device experience.

Java FiltersAASA File (AppID × Portal URL)

Content Management System (Portal & Mobile App)

Built a proof of concept for a unified Content Management System to manage email and SMS templates, localizations and carousels for both web and mobile from a single source of truth.

Kafka TopicsLiferay Web ContentPostgreSQLRESTful API
03

Hackathons & Competitions

AI Hackathon @ Netcracker Technology

WhatsApp E-commerce Onboarding Chatbot

Built a conversational onboarding system on WhatsApp that uses Meta Webhooks to automate customer registration, order processing and support. It enables businesses to onboard users with minimal friction, deliver real-time updates and drive higher engagement.

PythonDjangoMeta WebhookML Customer Profiling

AI/ML Parking Allotment System

Developed an intelligent parking allotment system that predicts real-time space availability with machine learning and sends instant notifications via Meta Webhooks. The solution optimizes allocation, reduces wait times and improves the user experience through automated updates.

PythonMachine LearningAngular 2Ultrasonic Sensors
04

Personal / Independent Projects

Inventory Management System

Electronic Goods Stock Management with Barcode Scanning

Built a desktop Inventory Management System in JavaFX with integrated barcode scanning to streamline stock tracking, order placement and billing for a retail electronics business.

JavaJavaFXSQLite/MySQLBarcode Scanner

JavaFX to Flutter Migration

Re-engineering the JavaFX Inventory Management System into a Flutter cross-platform application, extending it to mobile and cloud with Firebase-backed synchronization.

FlutterDartFirebaseSQLite/MySQL
05

Professional Certifications

DeepLearning.AI

Retrieval Augmented Generation (RAG)

Completed a professional course in Retrieval Augmented Generation, focused on combining information retrieval with generative AI to produce accurate, context-grounded responses.

Issued August 12, 2026 26-hour Course Credential ID: 735a0542
View Verified Certificate
06

Education

Pondicherry University

2012 – 2016

Bachelor of Engineering (B.E.) in Electronics & Communication Engineering

GMSSS, Aberdeen, Port Blair

2010 – 2012

Higher Secondary Education (CBSE)

GSSS Subhashgram, North Andaman

2001 – 2010

Secondary Education (CBSE)