SaaS engineering core
multi-tenancy, authentication, subscriptions, billing, integrations, and scalability. Productized platforms, not one-off internal tools with a login page.
Custom SaaS Development
Multi-tenant products with billing, roles, and the operations logic your category actually runs on.
Geek Theory turns vertical software — institute and HR systems, retail POS and trading ERP, food and event marketplaces, taxi and service dispatch, classifieds, lease accounting, web conferencing, IoT consoles, and Google data extraction — into platforms with authentication, subscriptions, and integrations. Not another generic CRM skin.
Intro & problem space
Category software dies in two ways. Off-the-shelf SaaS almost fits, so the team lives in spreadsheets around the edges. A custom build is scoped as “screens” instead of tenancy, billing, permissions, and the ugly workflows (layaways, residuals, PCI, parent portals, driver settlement) that are the actual product.
Geek Theory has already productised a large part of this map: Institute Management, HR Management, Event Booking, Food Ordering, Retail POS, Trading and Retail ERP, Lease Management, On-Demand Service Booking, On-Demand Taxi Booking, Classified Ads, Web Conference, IoT, and Google Data Extractor. Those were sold as separate pages. They are one discipline: multi-tenant systems, role-based admin, payments, notifications, and data that operations can trust.
If you are a founder with a vertical, we will not start from a blank CRUD app. We start from the module list we have already had to make work.
Capabilities
What We Build (Consolidated Capabilities)
Institute Management System
admin, parent, and student/staff roles; admissions and academic workflow; SmartEdu-class portals that replace paper administration.
HR Management System
recruitment, attendance, payroll, employee lifecycle, pensions, medical insurance, performance, training, travel, job-portal intake, and HR audit/compliance reporting. One source of truth for people data.
Event Booking Solution
marketplace for venues and events, ticket types and seat availability, virtual cart, multilingual UI, ratings, PayPal-class payments, regular/paid/archived inventory, and an admin that owns front-end and back-end.
Food Ordering Solution
customer ordering, multi-branch operations, admin dashboard, dual-purpose delivery, PayPal and Razorpay, and an end-user flow that does not collapse at payment.
Retail Point of Sale / Retail POS Software
cloud POS that balances on-stock and off-stock; inventory equilibrium; run-the-store-from-anywhere. PCI and EMV, authorised payments, refunds, layaways, special orders, centralized purchase, product transfer, work-order management, ecommerce sync, manufacturing/retail verticals, and a mobile app for the floor.
Trading and Retail ERP
chain, hypermarket, manufacturing, and healthcare-adjacent retail operations. Distribution, always-on operations, CRM, HR, and lease reporting where the retailer is also a lessor.
Lease Management System
equipment lease accounting for lessors without a dedicated IT bench. Lease and payment entry on one screen; schedules, payoffs, residuals, security deposits, non-cash payments; 80+ report class output to screen, print, PDF, and Excel; SQL Server-class data; export to spreadsheets, databases, and credit bureaus; mail merge.
On-Demand Service Booking
customer, provider, admin; CMS; automation; auth/payments; analytics; template and SEO surfaces for the marketplace.
On-Demand Taxi Booking
rider, driver, admin; taxi operations; payments; analytics; cloud security around dispatch.
Classified Ads Solution
customisable classified marketplace, admin for ads and orders, PayPal/ZayPay-class gateways, real-time notifications, personalization, automated insights, SEO, and hosting. Fixed-rate and custom engagement.
Web Conference App
video calling, multi-video, whiteboard, screen sharing, participant control, invite flows, meeting logs, language, lock/security, CRM hooks, HR and part-time staff modes, sound management, and cloud meeting control. Built as a product, not a Zoom wrapper slide.
IoT solutions
device-to-dashboard sync, MEAN-based IoT apps, authentication, and workflows that connect shop-floor or field hardware to the same SaaS tenancy as the rest of the business.
Google Data Extractor
extract, email extract, Google Maps/data pipelines, transfer, and machine-work automation for teams that need structured local/business data inside the product, not in a CSV on someone’s desktop.
CRM and billing products
the CRM Sabitha Kathirvel actually used; the billing software Yuvi Priya and Swetha ran for over a year. Customisable, brand-fit, finance-ops software — not a Salesforce parody.
API and integration layer
payments, communication, enterprise connectors, third-party APIs, and the glue between POS, ecommerce, and finance.
Internal enterprise systems
custom platforms, workflows, and data systems fitted to how the organisation actually works, including cron/job automation (gtcrons-class workers) for scheduled operations.
Engagement models
fixed cost, time and material, dedicated developer, hourly, part-time, full-time, onsite, contract. Hire Laravel, Magento, and web developers into the same product squad.
Delivery
Our Process
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01
Discover
Tenant model, who pays, which roles exist on day one, which workflows are non-negotiable (PCI, payroll, dispatch, lease payoff), and what must not be rebuilt from the module catalogue we already have.
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02
Architect
Tenancy, auth, billing, data stores, admin vs mobile vs web clients, and the integration map (payments, SMS, maps, accounting).
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03
Prototype
The operational happy path in each role (admin, staff, customer, driver/provider) with empty and error states, before visual polish.
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04
Engineer
Multi-tenant backend, role matrix, billing, the vertical modules, APIs, and the web/mobile clients the operators will live in.
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05
Deploy
Staging with real-shaped data, PCI/payment sandbox, monitoring, and a migration plan if you are leaving spreadsheets or a rival SaaS.
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06
Scale
New tenants, usage-based billing, dedicated capacity, and module expansion without forking the core.
Stack
Tech Stack
| Application | Node.js, Express, PHP, Laravel, Python/Django, React, Vue, Angular, TypeScript, MEAN (MongoDB, Express, Angular, Node). |
|---|---|
| Data | MySQL, MongoDB, Microsoft SQL Server (lease/reporting class), SQLite, warehouses and ETL/ELT when analytics is in scope. |
| Commerce & payments | Magento where the SaaS is a store; PayPal, Razorpay, PCI/EMV for POS; subscription billing in the SaaS core. |
| Realtime & jobs | Socket.IO, Firebase, cron/worker pipelines, notification buses. |
| Cloud & DevOps | AWS-class cloud, CI/CD, containers, Kubernetes where required, logging, monitoring, Git, GitHub, Postman. |
| Mobile clients of the SaaS | Flutter, Android, iOS — same backends. |
| IoT | MEAN-sync device apps, authenticated device telemetry. |
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React JS -
TypeScript -
NODE JS -
PHP -
Laravel -
MongoDB -
MySQL -
VUE JS -
Express JS
Why Geek Theory
Most agencies will offer to “build your Uber/Zomato/Shopify.” We already maintain the module DNA: POS with layaways and EMV, IMS with parent portals, LMS with residual and payoff math, classifieds with ad lifecycle, conferencing with participant control. Yuvi Priya’s billing brief and Sabitha’s CRM brief are the brand in one line: user-friendly, customisable, fitted to how the business runs. Founded in Chennai, shipping to Indian SMEs and international clients, with COO Bhupendra Kashyap and CTO Dheeraj Parmar on the engineering side of the house.
Next step
Start a SaaS Build
Send the category, the roles, and the one workflow that off-the-shelf tools keep dropping. We will map it onto tenancy, modules, and a build sequence you can fund in phases.
Start a SaaS Build · info@geektheo.com · +91 90434 86056
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