01SaaS · Operations · Mobile
Gym Manager
A mobile-first, multi-tenant gym management product concept for turning membership, attendance, expiry and billing workflows into one operational system.
View repository ↗Product Builder · AI & SaaS · Zero → One
I turn real-world problems into digital products.
I work from problem discovery through requirements, workflows, product design and hands-on implementation — combining customer understanding, AI, SaaS thinking and technical execution.
Product loop01—08
01Observe→
02Identify→
03Understand→
04Define→
05Design→
06Build→
07Test→
08Iterate→
About
Problem-first. Hands-on. Curious.
I’m Rahul Kumar, an early-career product builder based in Jamshedpur, India. I’m pursuing a BCA while working as a Retail Gemologist at Titan Company Limited (Tanishq).
My product work grows from real operational problems: how a gym can replace paper workflows, how a restaurant can run a digital menu and QR experience, or how an AI interface can help a business explain what it needs instead of searching a product catalogue.
I’m interested in AI products, SaaS, automation, customer-facing digital experiences and zero-to-one product development.
Selected work
Products I’ve conceived and built.
Self-initiated projects and product concepts. No fabricated adoption, revenue or user metrics.
02SaaS · Systems · Business
Atelier OG / Business OS
A broader product ecosystem for practical business tools, built around reusable modules, multi-tenancy and operational workflows.
View repository ↗03Restaurant · QR · Workflow
Digital Menu & QR System
A reusable digital menu foundation connecting QR entry, product discovery, ordering workflows and restaurant operations.
View repository ↗04AI · Conversational UX · Discovery
AI Requirement-to-Product Advisor
An AI-native concept where a business describes its problem and the system identifies the need, recommends relevant products, explains the fit and offers alternatives.
Product thinking
I build from problems, not features.
The same loop shows up across my work: understand what is happening, define the real problem, then build the smallest useful system.
01
Observe
What is happening?
02
Identify
What is actually broken?
03
Understand
Who experiences it?
04
Define
What should the product solve?
05
Design
What should the workflow be?
06
Build
Can we make it real?
07
Test
Does the solution make sense?
08
Iterate
What should change?
Case study lens
Every serious project follows the evidence.
01
Problem
02
User & Context
03
Product Hypothesis
04
Workflow & Architecture
05
Build & Learn
Detailed case studies will expand each project into context, pain points, goals, non-goals, user journey, information architecture, feature decisions, technical/data architecture, trade-offs, MVP scope, implementation and learnings.
Experience
Real users. Real operations.
Retail Gemologist — Tanishq / Titan Company Limited
Apr 2026 — Present · Jamshedpur
Customer-facing retail work with exposure to diamond expertise, DXC demonstrations, customer education and operational workflows. Tools and processes include Carat Meter, Clarity Viewer, Marking Viewer, LightScope and H&A loupe.
Retail Sales Officer — Tanishq
Apr 2025 — Mar 2026
Built practical experience in customer handling, retail operations, product communication and translating customer needs into relevant solutions.
Toolkit
Product + technology + business.
Product
Problem framingProduct discoveryRequirementsUser flowsMVP definitionSaaS thinking
AI
AI-assisted developmentConversational product conceptsAI workflowsAutomationRequirement discovery
Software
JavaScriptReactViteNode.jsExpressREST APIs
Data
PostgreSQLSupabaseRLSExcelOperational data
Infrastructure
CloudflareCloudflare WorkersCloudflare PagesGitHub
Design
UX thinkingWorkflow designCanvaFigmaPrototyping
Cybersecurity
SQL InjectionBurp SuiteKali LinuxWeb security
Build log
What I’m building around now.
SEP 2026AI Product AdvisorConversational requirement discovery concept
SEP 2026Gym ManagerMulti-tenant SaaS architecture and operational workflows
SEP 2026Atelier OG / Business OSReusable business-product ecosystem
AUG 2026Digital MenuSupabase + Cloudflare implementation
JUL 2026Tanishq / DXCCustomer education and QR/review workflow
Education & learning
Building the technical foundation behind the products.
BCA — Arka Jain University
2025 — Expected 2028
Current learning across programming, databases, software development, AI and cybersecurity.
Code Red
Cybersecurity learning
A structured hands-on learning journey across web security and pentesting.
92/100
Phase 1 · SQL Injection
Proof stack
See the thinking. Then inspect the build.
The portfolio is designed to connect product claims to case studies, repositories and professional profiles rather than relying on buzzwords.