Full Stack Developer · Kolkata

I build digital
systems that work.

From responsive interfaces to scalable APIs, real-time products and SAP applications—I turn complex requirements into useful software.

6+Production projects3SAP ABAP builds1stHackathon prize2026B.Tech graduate

Product-minded.
Backend-strong.

I'm a computer science graduate with hands-on freelance and independent project experience across full-stack engineering, scalable backend systems and SAP ABAP. I enjoy owning a product from its data model and API to the final interface people use.

Sandipan Das, Full Stack and SAP ABAP Developer
Full Stack Developer ExecutiveAcademy of Vedic Vidya

Ideas, engineered
end to end.

I combine product thinking with hands-on development to take useful software from concept to deployment.

Less manual work.
Better operations.

From n8n automations to custom ERP platforms, I design connected systems around the way your business actually works.

Smart technology for solving industry problems.

Software is most useful when it understands the workflow behind the screen. Each engagement starts with your users, operational constraints and measurable outcome.

Book a free consultation

Built to solve
real problems.

Products I've built across AI, healthcare, community, fintech, enterprise, communication and travel.

AI Text Classifier project preview01 / 19

AI-assisted classification API

AI Text Classifier

A full-stack classification service that uses a local LLM to categorize customer messages as complaints, queries, feedback or other, returning a validated confidence score through a production REST API.

ReactNode.jsExpressMongoDBOllama
Read case study

Apps built for
the small screen.

Production mobile experiences spanning community marketplaces and exam preparation, available through verified public store listings.

PulpitFill mobile application screen
PulpitFill secondary mobile application screen
iOS

Faith-tech marketplace · iOS

PulpitFill

iPhoneiPadRole-based accountsMessaging

A role-based mobile marketplace helping churches find trusted preachers, manage requests, coordinate availability and communicate in one product.

Gyanoda mobile application screen
Gyanoda secondary mobile application screen
Android

EdTech learning app · Android

Gyanoda

AndroidVideo learningMock testsSecure accounts

A mobile learning experience for WBJEE preparation with previous-year questions, step-by-step video solutions, course discovery and doubt support.

Featured open source

LaTeX Content
Renderer.

A universal npm package I built to render mathematics, chemistry, molecular structures and scientific content across web and mobile applications—with safe output for streamed AI responses.

TypeScriptMathJax 3SMILESReact NativeMIT
quick-start.tsxv1.1.3
$ npm install latex-content-renderer

import { SciContent } from
 'latex-content-renderer';

export default function Science() {
 return <SciContent
content={"E = mc² · H₂O · CCO"}
/>;
}
Rendered outputE = mc2H2O

One developer,
across the stack.

Comfortable moving between interface details, server architecture, data and deployment.

01Languages

Java, JavaScript, HTML, CSS, SQL

02Front end

React, React Native, Redux

03Back end

Node.js, Express, Spring Boot, REST APIs

04Data

MongoDB, PostgreSQL, MySQL

05Cloud & tools

AWS, Docker, Git, PM2, Nginx

06Enterprise

SAP ABAP, Open SQL, Data Dictionary

Java ✦JavaScript ✦HTML ✦CSS ✦SQL ✦React ✦React Native ✦Redux ✦Node.js ✦Express ✦Spring Boot ✦REST APIs ✦MongoDB ✦PostgreSQL ✦MySQL ✦AWS ✦Docker ✦Git ✦PM2 ✦Nginx ✦SAP ABAP ✦Open SQL ✦Data Dictionary ✦Java ✦JavaScript ✦HTML ✦CSS ✦SQL ✦React ✦React Native ✦Redux ✦Node.js ✦Express ✦Spring Boot ✦REST APIs ✦MongoDB ✦PostgreSQL ✦MySQL ✦AWS ✦Docker ✦Git ✦PM2 ✦Nginx ✦SAP ABAP ✦Open SQL ✦Data Dictionary ✦

AI engineering

Intelligence,
grounded in data.

I build practical LLM workflows that connect models with trusted knowledge, tools and production applications.

LangChainLangGraphRAGVector databasesLLM APIsEmbeddingsAI agentsPrompt engineering
rag_pipeline.graphLive workflow
InputUser query
OrchestrateLangGraph agent
RetrieveVector database
GroundRAG context
ReasonLLM response
OutputGrounded answer
Pipeline active6 connected steps
Three connected SAP enterprise applications for education, employee records and sales analytics
z_student_manager.abapABAP
01REPORT z_student_manager.
02 
03SELECT * FROM zstudents
04  INTO TABLE lt_students.
05IF sy-subrc = 0.
06  WRITE: / 'Records loaded'.
07ENDIF.
✓ Build successful 3 enterprise systems

SAP ABAP practice

Enterprise logic,
built with precision.

Hands-on mini projects in Eclipse ADT covering core ABAP development, data modeling, reporting and debugging.

Student ManagementCRUD operations, internal tables, Open SQL and filtered reports.
Employee RecordsDictionary tables, domains, data elements and record management.
Sales Report GeneratorClassical reports, modularization, debugging and testing in ADT.

Real projects.
Real ownership.

Professional and independent delivery experience built around practical products, clear communication and reliable execution.

Oct 2026 — Present Current role

Academy of Vedic Vidya · Kolkata, India

Full Stack Developer Executive

Full-stack developmentWeb applicationsBackend systemsProduction support

Building and maintaining reliable digital products for the Academy of Vedic Vidya, contributing across frontend, backend, APIs, databases and production delivery.

Develop end-to-end product features Build and integrate backend APIs Maintain application data and workflows Support testing, deployment and reliability
Jan 2026 — Jun 2026 Internship

StudyBloom 24 LLP · Remote

Backend Developer Intern

Node.jsExpress.jsMongoDBAWSNginxPM2

Developed and maintained backend services for Gyanoda, an educational platform for WBJEE and NEET preparation, supporting reliable experiences across its web and mobile applications.

Built REST APIs with Node.js and Express.js Implemented authentication and authorization Managed application data in MongoDB Integrated APIs and resolved technical issues Supported AWS deployment with Nginx and PM2
Jan 2024 — Jul 2026 Freelance experience

Full-stack development

Freelance & Independent Software Developer

FiverrUpworkLocal clientsRemote collaboration

Built and shipped web, mobile and backend solutions from initial requirements through development, testing and deployment. Worked directly with stakeholders, translated business needs into useful features and improved products through feedback.

Full-stack web applications React Native mobile productsREST APIs & database designDeployment & ongoing support
2022 — 2026

B.Tech in Computer Science

Future Institute of Engineering and Management · MAKAUT

CGPA 7.39 / 10
2020 — 2022

Higher Secondary · Science

Naihati Narendra Vidyaniketan · West Bengal

83.6%
2015 — 2020

Secondary Education

Shyamnagar Kanti Chandra High School · WBBSE

89.5%
2025 — 2026

Specialised learning

Cloud Computing with AWS · MERN Full Stack Development · SAP ABAP

Achievement

1st Prize · Directrix Hackathon

Built a C-based college library system with inventory, issue/return tracking and fine calculation.

Also participated in Smart India Hackathon

My résumé

See the complete
résumé right here.

Review my education, technical skills, SAP practice, certifications, achievements and complete project experience below.

Sandipan DasFull Stack Developer

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View résumé

Free consultation

Have a process
worth improving?

Tell me about your workflow, goals and timeline. I'll review your requirements and reply directly by email.

Free project consultationTell me what you need

From problem to production, step by step.

A clear path keeps decisions visible, reduces surprises and turns progress into something you can review.

01

Discover the business problem

Clarify the goal, bottlenecks and result that matters.

In focus
02

Map users, data and workflows

Understand who does what, with which information and tools.

Step 2
03

Design, build and test

Deliver working milestones and validate them with real scenarios.

Step 3
04

Launch, train and improve

Release confidently, support adoption and learn from usage.

Step 4

Before we start.

Is the consultation really free?+

Yes. The first requirement review is free and helps clarify scope, priorities, risks and the right delivery approach.

What happens after I submit my requirement?+

I review the workflow, technical needs and priorities, then contact you with recommended next steps and a clear delivery plan.

Can you automate our existing tools with n8n?+

Yes. I can connect supported APIs, webhooks, email, databases, spreadsheets and business tools, with monitoring and failure handling.

How will you contact me?+

After reviewing your requirement, I&apos;ll reply directly to the email address you provide.

Do you build complete enterprise ERP software?+

I build scoped custom ERP modules and operational platforms. Large programmes begin with discovery and are delivered in milestones.