SaaS Development for Products Built to Scale, Sell and Pass Review
D2i Technology designs, builds, tests and runs SaaS products, from a first MVP to a multi-tenant platform with billing, integrations and enterprise-ready security and accessibility. Development, QA, penetration testing and WCAG compliance come from one team, so your product is ready for the customers who ask the hard questions.
What we build
- SaaS MVPs A focused first release you can put in front of paying users
- Multi-tenant platforms Tenant isolation, roles and per-customer configuration
- Subscription billing Plans, trials, usage metering, invoices and tax
- Integrations and APIs CRMs, ERPs, payment gateways and your public API
- Security and accessibility Pen testing, WCAG audits and VPATs for enterprise deals
- Modernization and support Legacy rebuilds, DevOps and SLA-backed maintenance
- 17+ Years of engineering experience
- 10× Faster releases for ZiffyCar
- ISO 27001 Certified information security
- ISO 9001 Certified quality management
- India + USA Global delivery
Who We Build SaaS For
Different stages need different help. Find the one that sounds like you.
Founders With an Idea
You need a product people can sign up for and pay for, without building features nobody uses yet.
How we help: Discovery, clickable prototype, MVP and launch.
SaaS Companies Scaling Up
Customers are signing up faster than your releases, your infrastructure or your team can keep up.
How we help: Dedicated engineers, DevOps, performance and multi-tenancy work.
Businesses Productizing Software
You built an internal tool or a service business and want to sell it to other companies.
How we help: Tenancy, billing, onboarding and a self-serve experience.
Teams Selling to Enterprises
Procurement wants security reports, a VPAT and answers on data isolation before they sign.
How we help: Penetration testing, WCAG audits, VPATs and SSO.
SaaS Product Development Services
Everything a SaaS product needs to go from idea to recurring revenue, built and tested by one team.
SaaS MVP Development
A focused first release that proves people will sign up, use it and pay for it.
How it works: SaaS MVP DevelopmentMulti-Tenant Architecture
One codebase serving many customers, with each customer's data kept separate.
How it works: Multi-Tenant ArchitectureSubscription and Payment Integration
Plans, trials, upgrades, usage billing, invoices and failed-payment recovery.
How it works: Subscription and Payment IntegrationThird-Party API Integrations
Connect to the tools your customers already use, and offer an API of your own.
How it works: Third-Party API IntegrationsSaaS Testing, Security and Accessibility
QA, penetration testing and WCAG compliance so you can answer security and accessibility reviews.
How it works: SaaS Testing, Security and AccessibilitySaaS Modernization and Maintenance
Rebuild legacy systems, fix release pipelines and keep the product healthy after launch.
How it works: SaaS Modernization and MaintenanceAn MVP Is the Smallest Product Someone Will Pay For
Most failed MVPs did not fail on code. They tried to do too much, or they skipped the parts a paying customer needs on day one: sign-up, roles, billing and a way to get help. We cut scope hard and keep those basics in.
A simple MVP typically takes 4 to 8 weeks. We start with a short discovery workshop and a clickable prototype, so you can test the flow with real prospects before development starts.
Real example: for MyTaxProf, we built one marketplace that connects clients with Chartered Accountant firms. It has four role-based experiences, email OTP and document-verified firm onboarding, and service requests tracked in one place instead of scattered across channels.
What goes into a D2i SaaS MVP
Day one essentials
- Sign-up, login and password reset
- Roles and permissions
- The one core workflow
- Subscription or payment
- Admin dashboard
- Email notifications
- Product analytics
- Error monitoring and backups
Usually later
- Native mobile apps
- Custom reporting builder
- Public API and webhooks
- SSO and SCIM
- White-labelling
- Marketplace of add-ons
"Later" does not mean "never". We design the data model and architecture so these can be added without a rewrite.
One Product, Many Customers, No Data Leaks
Multi-tenancy is the decision that is hardest to change later. It affects cost, security, performance and what you can promise enterprise buyers. We help you choose the right model up front.
| Tenancy model | How it works | Best for |
|---|---|---|
| Shared database, shared schema | Every table carries a tenant ID, enforced in code and with row-level security. | Self-serve products with many small customers and low cost per tenant. |
| Shared database, schema per tenant | Each customer gets their own schema inside one database. | B2B products that need stronger separation and per-customer customization. |
| Database per tenant | Each customer has a dedicated database, often in their chosen region. | Enterprise, healthcare or fintech buyers with strict isolation or data residency needs. |
| Hybrid | Shared by default, with dedicated infrastructure for premium or regulated customers. | Products that sell both a self-serve plan and an enterprise plan. |
Tenant isolation
Isolation enforced at the data layer and tested, not just checked in the UI.
Roles per tenant
Owners, admins and members per customer, like the four roles we built for MyTaxProf.
Per-tenant configuration
Feature flags, branding, limits and settings without forking the code.
Noisy-neighbour protection
Rate limits, queues and auto-scaling so one busy customer cannot slow down the rest.
Billing That Matches How You Want to Charge
Pricing changes more often than almost anything else in a SaaS product. We build billing so your team can add a plan, run a promotion or move to usage-based pricing without a new release.
We connect your product to a proven billing provider instead of writing payment logic from scratch. That keeps card data out of your systems and reduces your PCI DSS scope.
- Stripe Billing
- Razorpay Subscriptions
- Chargebee
- PayPal
- Paddle
- Apple and Google in-app purchases
Plans and trials
Free, tiered and per-seat plans, free trials and coupons.
Usage-based billing
Metering for API calls, seats, storage or any unit you charge for.
Upgrades and proration
Plan changes mid-cycle, charged or credited correctly.
Invoices and tax
Branded invoices with GST, VAT or US sales tax handled.
Failed-payment recovery
Retries, reminder emails and grace periods to reduce churn.
Entitlements
Features switched on and off by plan, enforced in the product.
Fit Into the Tools Your Customers Already Use
Integrations are often the reason a customer picks one SaaS product over another. We build them to handle retries, rate limits and expired tokens, so a slow partner API does not become your outage.
Payments and billing
- Stripe
- Razorpay
- PayPal
- Chargebee
CRM and sales
- Salesforce
- HubSpot
- Zoho CRM
Identity and SSO
- Microsoft Entra ID
- Okta
- SAML and OIDC
Communication
- Twilio
- SendGrid
- Slack
- WhatsApp Business
ERP, accounting and logistics
- QuickBooks
- Xero
- Tally
- Legacy ERPs
Your own platform
- Public REST APIs
- Webhooks
- API keys and OAuth
- Developer docs
Real example: Okara Enterprises, a global logistics company, had shipment and inventory data split across legacy systems with no unified reporting. We built a cloud web application integrated with those systems to centralize the data. Order processing went from 5 days to 3, on-time delivery rose from about 73% to 88%, and the company saves around $500K a year.
Be Ready When the Buyer Sends a Security Questionnaire
Larger customers will ask for a penetration test report, proof that tenants are isolated, and often a VPAT showing WCAG conformance. Most development firms send you to another vendor for these. D2i does them in-house, alongside the build.
Functional and automated QA
Manual and automated regression testing in CI, so releases do not break billing or sign-up.
Learn more about Functional and automated QAPenetration testing
Web app, API and cloud pen testing, including tests that try to read another tenant's data.
Learn more about Penetration testingAccessibility and VPATs
WCAG 2.2 AA audits, remediation and VPATs for buyers covered by Section 508, ADA or the EAA.
Learn more about Accessibility and VPATsPerformance testing
Load tests that model your real tenant mix and peak hours before customers find the limits.
Learn more about Performance testing- ISO 27001
- ISO 9001
- OWASP Top 10
- Tenant isolation tests
- WCAG 2.2 AA
- VPAT
- Section 508
- GDPR and DPDP ready
- NDAs
When Growth Outpaces Your Platform
Monthly releases, outages at peak hours and a codebase nobody wants to touch are common in growing SaaS products. We fix the foundations without stopping feature work.
Legacy to SaaS migration
Move single-customer or on-premises software to a cloud, multi-tenant model in phases.
DevOps and release pipelines
Infrastructure as code, CI/CD and deployment gates so you can release daily with confidence.
Cloud cost and scaling
Auto-scaling, right-sizing and monitoring on AWS, Azure or GCP.
Data platform rebuilds
Pipelines, warehousing and reporting your customers and your team can rely on.
Code and architecture refactoring
Break up risky monoliths where it pays off, and add tests before we change anything.
Maintenance and support
Bug fixes, security patches, dependency updates and SLA-backed support after launch.
Real example: ZiffyCar, a peer-to-peer car rental marketplace in 50+ cities, was releasing monthly. 65% of its downtime came from environment issues, often during weekend booking peaks. We consolidated its DevOps under one team and added infrastructure as code, auto-scaling and monitoring. ZiffyCar now releases daily (10× faster), has 65% less downtime at peak hours and spends 40% less on DevOps.
Platforms We've Built and Scaled
Real engagements, real outcomes. Every result below comes from a published D2i case study.
A CA Services Marketplace for MyTaxProf
- The problem
- Clients had no central place to find Chartered Accountant firms, and firm onboarding needed verification and approval.
- What we built
- A multi-role platform with client and firm dashboards, OTP and document-verified onboarding, tracked service requests, in-platform messaging and Form 16 uploads.
- 4 Role-based experiences
- 1 Connected marketplace
DevOps Transformation at ZiffyCar
- The problem
- Growth across 50+ cities was outpacing monthly releases, and environment issues caused downtime during peak bookings.
- What we built
- One DevOps team, infrastructure as code for new city environments, release standards, auto-scaling and monitoring.
- 10× Faster releases
- 40% Lower DevOps spend
Custom Web Application at Okara Enterprises
- The problem
- Legacy systems gave no real-time shipment tracking, data entry was manual and missed deliveries were driving churn.
- What we built
- A cloud web app with real-time tracking, reporting and analytics, integrated with the existing legacy systems.
- $500K Saved per year
- From 73% to 88% On-time delivery
Streamlining Data Operations
- The problem
- Data was siloed across departments and each manual extraction cycle took more than 72 hours.
- What we built
- A unified data platform on Google Cloud with ETL pipelines, a data warehouse and automated quality checks.
- From 72 hours to under 4 hours Per processing cycle
- 30% Lower operating cost
How We Take a SaaS Product to Market
Six stages, with working software at the end of every sprint
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Step 01
Discover
Users, pricing model, tenancy needs and the one workflow that matters most.
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Step 02
Prototype
A clickable prototype you can test with prospects before code is written.
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Step 03
Architect
Tenancy model, billing, integrations, cloud setup and cost plan.
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Step 04
Build and test
Two-week sprints with QA, security and accessibility checks built in.
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Step 05
Launch
Production deployment, monitoring, backups and onboarding of first customers.
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Step 06
Grow
Feature releases, scaling, performance tuning and SLA-backed support.
What Happens After You Contact D2i?
No big commitment up front. Here is what the first few weeks look like.
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Step 1: 30-minute discovery call
We learn about your product, users and timeline.
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Step 2: Scope review
We separate what you need at launch from what can wait.
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Step 3: Written proposal
Approach, team, timeline and estimate.
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Step 4: Delivery plan
Milestones, demos and who does what.
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Step 5: Start building
Your team is onboarded and sprint one begins.
A Proven Stack for SaaS
Mainstream, well-supported technology your future team can hire for and maintain.
Frontend
- React
- Next.js
- Angular
- Vue.js
- TypeScript
Backend
- Node.js
- Python
- Laravel
- .NET
- Java Spring Boot
Databases
- PostgreSQL
- MySQL
- MongoDB
- Redis
Cloud
- AWS
- Microsoft Azure
- Google Cloud
DevOps
- Docker
- Kubernetes
- Terraform
- GitHub Actions
Monitoring and analytics
- Grafana
- Sentry
- CloudWatch
- Product analytics
Why SaaS Teams Choose D2i
Plenty of firms can write the code. Fewer can also test it, secure it and make it accessible.
Build, Test and Secure in One Team
Development, QA, penetration testing and accessibility under one roof, with no hand-offs between vendors.
Enterprise-Ready From the Start
Pen test reports and VPATs are things we produce, so procurement reviews do not stall your deals.
Measured Results
Our case studies cite before-and-after numbers, like ZiffyCar's 10× faster releases and Okara's $500K saved each year.
Certified Processes
ISO 27001 and ISO 9001 certified, with NDAs signed before you share anything.
Global Delivery
India-based engineering with experience serving clients across the USA and beyond, at up to 60% savings versus onshore teams.
You Own Everything
Full ownership of code, infrastructure and documentation, plus support after launch if you want it.
How Can We Work Together?
Whether you need a full product team or engineers to extend your own, we match the engagement to your stage.
Build My SaaS Product
Discovery, design, development, testing, launch and support from one team.
Best for: Founders and businesses launching a new SaaS product.
Extend My Product Team
Dedicated developers, QA and DevOps engineers who work inside your process.
Best for: SaaS companies with a live product and a growing roadmap.
Modernize My Platform
An assessment followed by a phased plan for architecture, DevOps, security and performance.
Best for: Teams struggling with slow releases, outages or legacy code.
Choose How You Pay
Dedicated Team
Monthly retainer for ongoing product development, with predictable billing.
- Full-time dedicated engineers
- Daily standups and sprint planning
- Maximum cost efficiency
Fixed-Price Project
For a well-scoped MVP or module. Agree on price, timeline and milestones up front.
- Clear scope and milestones
- Fixed budget, no surprises
- Defined delivery dates
Flexible Hourly
Pay only for hours worked. Best for audits, short sprints or expert consultation.
- No long-term commitment
- Transparent time tracking
- Scale up or down any time
What Clients Say
In recognition of exceptional performance, dedication, hard work, passion, and commitment to excellence — D2i Technology’s invaluable contribution continues to make a significant impact in support of our All Hazards, One Health, One Nature mission.
Allison A. Sakara
Co-Founder & Executive Director, High Alert Institute
Their DevOps Services in USA helped us significantly reduce deployment time and infrastructure costs. D2i Technology streamlined our CI/CD pipelines and improved system stability. The results were visible within weeks, and their DevOps expertise truly made a difference.
DevOps Services & Solutions (USA)
D2i Technology is a highly dependable Web Development Company in India. From requirement gathering to final delivery, their team demonstrated strong technical expertise and ownership. The final product was robust, user-friendly, and built exactly as envisioned.
Web Development Company (India)
Frequently Asked Questions
The questions we hear most before a SaaS project starts.
Related Services
Explore the services that work alongside SaaS development.
Web App Development
Custom web applications, portals and dashboards. Learn more about Web App DevelopmentMobile App Development
iOS and Android companions for your SaaS product. Learn more about Mobile App DevelopmentDevOps Services
CI/CD, infrastructure as code and cloud cost control. Learn more about DevOps ServicesAPI Penetration Testing
Find authorization and tenant isolation flaws in your APIs. Learn more about API Penetration TestingVPAT Services
Accessibility conformance reports for enterprise buyers. Learn more about VPAT ServicesReady to Build Your SaaS Product?
Tell us what you're launching, scaling or fixing. We'll help you work out the right scope, architecture, team and next steps.
No obligation. Start with a 30-minute discovery conversation.