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Hello, I'm Aritra Sen

Back-endDeveloper

Building scalable backend solutions with modern technologies, focused on performance, reliability, and clean system design that powers real-world applications.

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About Me

A passionate software engineer specializing in building scalable backend systems and high-performance web applications.

Who I Am

I'm a software engineer with a strong foundation in backend development, specializing in Node.js, TypeScript, NestJS, databases, and scalable system design. I focus on building reliable, high-performance APIs and backend services that power real-world applications.

With experience across both startup and enterprise environments, I've developed a solid understanding of scalable architectures, system reliability, and modern development practices. I enjoy collaborating with cross-functional teams to design and deliver impactful, production-ready solutions.

Outside of work, I actively explore new backend technologies, improve system design skills, contribute to open-source projects, and participate in hackathons to continuously push my technical boundaries.

Education

B.Tech in Computer Science and Engineering

Government College of Engineering and Leather Technology

Kolkata, West Bengal
Aug 2019 - July 2023

CGPA: 9.44/10.0

Achievements

Hack4Bengal 2022

Top 3 finalist and team lead

View Certificate →

Work Experience

My professional journey in software engineering, building innovative solutions and growing with each opportunity.

SDE - Backend

Mumbai, India
September 2024 - Present
  • Developed and optimized the backend for the Quick Overdraft Product serving ETB and NTB customers, enabling automated loan disbursement based on credit history and risk assessment.
  • Implemented Redis-based API response mocking to ensure seamless inter-service communication and maintain system resilience during microservice downtime or dependency unavailability.
  • Integrated Omnidocs, an internal AXIS Bank Object Storage Service, into the product for secure storage and retrieval of sensitive documents such as CIBIL reports, bank statements.
  • Developed a Backoffice Module to facilitate manual verification (eyeballing) of loan applications flagged for suspicious activity, fraud detection, and KYC anomalies.

Technologies Used:

Node.jsMongoDBJavaScriptTypeScriptExpress.jsApache KafkaRedisAmazon SQSJenkinsDockerKibana

Associate Software Engineer

Hyderabad, India
February 2023 - September 2024
  • Designed the backend architecture of an enterprise-level Invoice Management System for Reliance with 4-tier verification workflows using NestJS, TypeORM, and MS SQL Server to ensure high scalability and a modular code structure.
  • Implemented secure RBAC, transactional consistency, and database locking, enhancing data integrity and concurrency by 18%, and boosting query performance by 25% through indexing and query optimization.
  • Developed a performance-optimized core backend modules of Yashoda Hospital’s HIS Module using Node.js, Express.js, Sequelize, and OracleDB, streamlining hospital operations and strengthening data integrity across multiple branches.
  • Addressed automated data synchronization and post-transaction processes by incorporating cron jobs, reducing manual interventions by 40% and maintaining real-time system consistency.
  • Developed and deployed a multi-tenant SaaS platform for insurance policy distribution to brokers and marketing agencies using NestJS, MongoDB, AWS S3, and AWS Lambda, achieving 99.9% uptime, modular microservice scalability, and secure cloud data storage.

Technologies Used:

Node.jsJavaScriptExpress.jsNestJSTypeScriptMongoDBPostgreSQLTypeORMReact.js

Software Engineer Intern

Remote
Aug 2021 - Feb 2022
  • Collaborated with Node.js Development Team, delivering valuable contributions to two enterprise applications.
  • Developed a Full-Stack internal pay-slip tool with React-Typescript, reducing manual hovering time by 17 minutes and increasing invoice management efficiency.

Technologies Used:

Node.jsJavaScriptReact.jsMongoDBExpress.jsAnt DesignMERN Stack

Featured Projects

A collection of projects showcasing my expertise in backend development, scalable system design, and problem-solving.

E-School-Hub

E-School-Hub

A complete school management software with comprehensive administrative features and role-based access control.

Key Features:

  • Built and deployed a robust platform with CSV export functionality
  • Implemented user authentication and role-based access control
  • Developed comprehensive administrative features for school management
  • Created responsive UI with modern design patterns

Technologies:

React.jsAnt DesignNest.jsMongoDBVercel

MediEasy

MediEasy

An optimized hospital finder application that helps users discover nearby healthcare facilities with real-time availability data.

Key Features:

  • Developed a location-aware app for discovering nearby hospitals
  • Integrated real-time ICU and blood availability data
  • Implemented location-based search and filtering
  • Created intuitive user interface for emergency situations

Technologies:

React.jsAnt DesignLocationIQNode.jsExpress.jsMongoDB

Technical Skills

A comprehensive toolkit of technologies and tools I use to build modern, scalable applications and deliver exceptional user experiences.

Programming Languages

JavaScript
TypeScript
Java

Frameworks & Technologies

Node.js
Nest.js
Express.js
Rest API
React.js
HTML
CSS
JWT
EJS

Libraries & Tools

TypeORM
Mongoose
Jsonwebtoken
Sequelize
JSON Web Token
Git
GitHub

Databases

MongoDB
Redis
PostgreSQL
MySQL
OracleDB
MSSQL

Distributed Systems

Microservices
Docker
NGINX
Apache Kafka
AWS (S3, EC2, SQS)

Tools/Infra

Git
CI/CD (GitHub Actions, Jenkins)
BitBucket
Kibana
GitHub
GitLab
Postman
Swagger
Vercel
Jira
Slack
Teams
VS Code

What I Bring to the Table

Beyond technical skills, I bring a collaborative mindset, problem-solving approach, and commitment to delivering high-quality solutions that drive business value.

Problem Solving

Analytical approach to complex technical challenges

Team Collaboration

Effective communication and cross-functional teamwork

Continuous Learning

Staying updated with latest technologies and best practices

User-Centric Design

Focus on creating intuitive and accessible user experiences

Get In Touch

I'm always open to discussing new opportunities, interesting projects, or just having a chat about technology and innovation.

Let's Connect

Location

Kolkata, West Bengal, India

Follow Me

My Tech Arsenal

Technologies I work with to build amazing digital solutions

Node.js
JavaScript
TypeScript
MongoDB
Redis
Nest.js
Apache Kafka
Git
GitHub
BitBucket
PostgreSQL
Docker
Vercel
React.js