Available for selected builds

Full-stack systems / Applied AI / Cybersecurity

Sumit Kumar Das

I engineer production systems for institutions, government teams and growing brands, from the interface to the infrastructure behind it.

35+ brands Institutional systems Applied AI

Scroll to navigate the system

Engineering across every layer

01 0

years building and shipping

02 0

brands and organisations reached

03 0

major open-source projects with merged code

04 0

npm downloads in week one

Deployment field / selected impact

Evidence before
experiments.

Institutional, government, education and commerce systems delivered independently or through the teams I have worked with.

01

Institutional healthcare

Public web + administration

Patna Medical College & Hospital

High-trust information architecture for a major medical institution.

Contributed to a public and administrative web system where departments, notices, staff information and daily content operations must remain clear under institutional scale.

Contribution

Full-stack web, CMS workflows, dashboards and deployment support

  • PUBLIC WEB
  • CMS
  • ADMIN
  • DEPLOYMENT
Visit PMCH
02

Applied AI in education

RAG support layer

IEM / UEM Kolkata

A retrieval-augmented assistant built into an institutional website.

Implemented a RAG chatbot advancement for the IEM-UEM ecosystem, turning distributed institutional information into a faster support and discovery surface.

Contribution

RAG architecture, retrieval workflow, interface integration and deployment

  • RAG
  • RETRIEVAL
  • LLM
  • WEB INTEGRATION
Visit IEM
03

Education operations

Two live institutions

School ERP SaaS

One operational platform, adapted to two different schools.

Engineering contribution to an ERP-style SaaS used at Patna Girls High School and Doon Public School, covering role-based administration and repeatable school workflows.

Contribution

Product UI, backend modules, role workflows and rollout engineering

  • SAAS
  • RBAC
  • OPERATIONS
  • MULTI-TENANT
Read deployment record
04

Government AI system

Citizen support

Barh Nagar Parishad

An AI support layer designed for a municipal public-service context.

Worked on a B2G AI support system for Barh Nagar Parishad, translating civic information and service needs into a more navigable citizen-facing experience.

Contribution

Applied AI, service flows, public interface and production integration

  • B2G
  • AI SUPPORT
  • CIVIC UX
  • KNOWLEDGE
Visit Barh council
05

International D2C commerce

Commerce engineering

Paws for Greens

Brand, catalogue and conversion systems for a growing pet-wellness business.

Commerce engineering exposure for an international-facing plant-based pet wellness brand, balancing storefront presentation with maintainable product operations.

Contribution

Shopify development, commerce UX, integrations and storefront operations

  • SHOPIFY
  • D2C
  • INTEGRATIONS
  • OPERATIONS
Visit Paws for Greens
06

Agency + venture exposure

National and international

Multi-brand delivery

Systems shipped across commerce, education, healthcare and public services.

Work across Altiedge, UrsDigitally and partner teams expanded the operating range from rapid storefront delivery to CMS migrations, API integrations and long-lived business software.

Contribution

Full-stack delivery across Shopify, WordPress, October CMS, Laravel and APIs

  • ALTIEDGE
  • URSDIGITALLY
  • CMS
  • FULL-STACK
Trace the experience

System architecture / six layers

Not a stack list.
A field of responsibility.

The advantage is not knowing many tools. It is being able to make the right decision where product, infrastructure and risk intersect.

  1. 01

    Full-stack product engineering

    Web apps, dashboards, ERPs and API platforms

    React, Next.js, Astro, Node, Nest, Express, Spring Boot, ASP.NET Core and FastAPI for end-to-end product builds.

  2. 02

    Commerce and CMS engineering

    Shopify, WordPress, October CMS and Laravel

    Storefronts, custom themes, CMS workflows, Shopify app work, B2B flows, WooCommerce and headless commerce migrations.

  3. 03

    Legacy modernization

    Classic systems to headless architectures

    ASP.NET MVC, older CMS builds and monolithic workflows moved into cleaner API-driven systems with practical rollout paths.

  4. 04

    Applied AI and automation

    RAG, NLP, agents and rapid prototyping

    Generative AI, ML pipelines, transcription, summarization, multi-agent automation and product prototypes that move from demo to deployment.

  5. 05

    Cloud, DevOps and scale

    Deployment, observability and queues

    AWS, GCP, Docker, Kubernetes, Nginx, CI/CD, Kafka, RabbitMQ, caching and horizontal or vertical scaling decisions.

  6. 06

    Security-minded engineering

    VAPT, OWASP and secure delivery

    Cybersecurity foundation from IIIT Delhi work, VAPT exposure, secure auth, hardening, risk assessment and production hygiene.

Operating history / selected roles

Range earned
inside real teams.

Delivery across product companies, venture teams, research, security and multi-brand engineering environments.

  1. 01

    Sep 2026 - present

    Quant & Algo Intern

    Futures First

    Building C#/.NET components for automated trading workflows: order lifecycle handling, rule-based strategy logic and event-driven, latency-sensitive services. Also built real-time market-data integrations and alerting tools.

  2. 02

    Jun 2025 - Oct 2026

    Software & AI Systems Engineering Intern

    Agadhanimus Technologies Pvt. Ltd.

    Built SaaS products from scratch: ShikshaCloud, a school ERP running at multiple schools, and Opshiva, an agentic voice-AI system deployed for a municipal body. Also multi-vendor commerce and WebRTC classroom systems.

  3. 03

    Nov 2025 - Oct 2026

    Forward Deployment Engineering Intern

    UrsDigitally

    Contributed across Shopify, WordPress, October CMS and Laravel engagements, including CMS workflows, dashboards, integrations and a role-based NGO ERP for Deep Ranjani.

  4. 04

    2024 - present

    Freelance Full-Stack Developer

    Client projects

    Delivered production web apps, dashboards and ERP-style systems for brands and institutions including GoOffice, WPS Office, Patna Medical College and Nagar Nigam. Work included legacy modernization, Shopify and WordPress integrations, and headless API architecture.

  5. 05

    Sep 2025 - present

    SDE Intern

    Catchaxe.com

    Cloud scaling and AI-oriented full-stack work across backend optimization, deployment automation and distributed processing.

  6. 06

    1 year - completed

    Full-Stack Developer Intern

    AR Village Technologies Pvt. Ltd.

    A one-year full-stack engagement spanning frontend delivery, backend implementation, integrations and production support.

Open the complete operating history

Merged upstream / open source

Code running inside
tools millions use.

Small, well-tested fixes reviewed and merged by the maintainers of Python, Node.js, Spring and Ubuntu.

  1. 01

    CPython

    #156474

    Don't specialize LOAD_ATTR_MODULE for module subclasses

  2. 02

    Node.js

    #61951

    esm: avoid a super-linear regex when parsing data: URL MIME types

  3. 03

    Spring Boot

    #51156

    Structured logging: a failed JSON encode no longer corrupts the next log event

  4. 04

    Spring Boot

    #51372

    Support provided-scope libraries when extracting an executable war

  5. 05

    Spring Security

    #19477

    Differentiate Forwarded and X-Forwarded headers in the proxy docs

  6. 06

    Ubuntu App Center

    #2217

    Allow installing updates from local deb files

  7. 07

    Ubuntu Yaru

    #1100

    Accessibility: avoid duplicate tab stops in toggle list tiles

  8. 08

    Beckn ONIX

    #895

    Reject a Data Integrity proof with no verificationMethod

  9. 09

    MONAI

    #8753

    Clearer error messages in the image writers

See everything on GitHub
Sumit Kumar Das surrounded by logos representing more than 35 brands and projects

Exposure map / 35+

Many industries.
Different constraints.
One accountable engineer.

This exposure combines independent freelance projects with client work delivered through internships, agencies and partner companies.

Enter the work archive
24RxAdani AI LabsAltiedgeAmaraaBandhan Business SchoolBPR NetworksChhapakhanaDeep Ranjani NGODoon Public SchoolEasy KiranaFitGreenGoOfficeHealth SevaIndian Institute of GemsIEM LabsIIIT DelhiLiving Healthy 24Maya6419Mind CrestNagar NigamNoble MissionPatna Girls SchoolPatna Medical CollegePaws for GreensPolice Department of JharkhandPratyashaPromise EducationRove DashcamsShikshaCloudSuccess MenswearSujata AppliancesSvectorThe Hazelnut FactoryUrsDigitally

Build mode / active

Complex systems deserve clarity, ownership and nerve.

I build production-grade web, commerce, AI and security-aware systems. My work spans startup products, institutional platforms, CMS builds, ERP-style dashboards, cloud deployments and automation.

Put a system in motion