Leelija provides software product development services for startups, growing businesses and enterprises in the USA, UK, Europe, Australia, the UAE and India. We help you validate the idea, build an MVP your users can try, launch it and keep improving it until it grows into a product people pay for.
As a digital product development company, we build our own products too, including FastBill, a SaaS billing and stock management platform, and nidhisoft.com, microfinance software. One team covers discovery, design, engineering, testing, launch and scaling, from our development center in Kolkata, India.
You may have a promising idea but not know what to build first. You may have an MVP that customers like but that buckles as usage grows. Or you may have an established product that has fallen behind what customers expect. Each stage needs a different plan.
As a software product development company, we start with the problem, the users and what success looks like, then decide what to build, in what order, and how to measure whether it works. We question features that will not move the product forward, because building less of the right thing is faster and cheaper. If you are still shaping the experience, our product design and UI/UX design teams handle research, flows and prototypes alongside the engineers.
Software product development services cover everything needed to turn an idea into a software product people use and pay for: discovery and validation, roadmap planning, UX/UI design, engineering, testing, launch and continuous improvement. Unlike a one-off software project, a product is built for a market of users and keeps evolving after launch.
Digital product development services apply the same process to any software people use on a screen: web apps, mobile apps and SaaS platforms.
Here is how a software product differs from a custom software project:
Need a tool for your own team rather than a product for customers? See our custom web development services.
Most products fail for business reasons, not technical ones. In CB Insights’ analysis of failed startups, 35% cited no market need and 38% ran out of cash. Building too much is also common: Pendo’s Feature Adoption Report found that 80% of features in the average software product are rarely or never used. A structured product development process tackles both risks:
Test the riskiest assumptions before spending on a full build
Launch a focused MVP in weeks, not months
Spend your budget on the features users actually need
Learn from real user behavior, not opinions
Avoid costly rewrites with an architecture built to grow
Connect the product to payments, CRMs and other systems
Make onboarding and core journeys simple from day one
Show investors a working product and real usage data
Prioritize every release with analytics and feedback
Own a product and codebase you can scale for years
Whether you need new product development services for an idea or help with a product that is already live, each stage calls for a different plan:
Confidence that the problem is real and the product is feasible
Discovery sprint, proof of concept, product roadmap
Something users and investors can see and try
Clickable prototype, then MVP development
Stability, better onboarding, the features paying users ask for
Product engineering, analytics, SaaS features, performance work
More capacity and a team that knows the code
Dedicated product development team
Modern technology, better UX, lower maintenance cost
Product modernization in stages
Our digital product development services cover every stage, from the first workshop to scaling a live product. You can start with any one of them.
Our product discovery services turn an idea into a testable plan. In one to two weeks we define target users, the problem, competitors, the riskiest assumptions, must-have features and technical feasibility, and finish with a scope, estimate and recommended next step. Product development consulting is also available on its own for teams that need an outside view.
We turn priorities into a release roadmap: what goes into the MVP, what follows in versions 1.1 and 2.0, which metrics decide what comes next, and what the dependencies are. The roadmap changes as you learn from users.
When the biggest risk is technical, such as an unusual integration, AI feature or performance requirement, we build a small proof of concept first, so you do not fund a full build on an untested assumption.
Clickable Figma prototypes of the key journeys, which you can test with users and show to investors before development starts.
Our MVP development services deliver the smallest version of your product that real users can use and pay for, typically in 8 to 14 weeks. Minimum viable product development is about learning fast without cutting corners: the MVP is built on clean architecture so it can grow into the full product without a rewrite. Founders choose us as their MVP development company because the same team can carry the product beyond launch.
We build SaaS products with multi-tenant architecture, sign-up and onboarding, team accounts and roles, subscription billing, admin dashboards, usage analytics and integrations. As a SaaS product development company, we have also built and run our own SaaS product, FastBill, so we plan for the realities of billing, support and uptime from the start.
Marketplaces, B2B platforms, booking products, fintech tools and industry-specific software designed around what makes your product different, not a template.
Fast, responsive web products with React or Next.js frontends, secure backends, databases and APIs. For internal business tools rather than market products, see custom web development.
iOS and Android apps built with React Native or Flutter, sharing one backend with your web product, including notifications, offline use and app store submission.
Architecture, frontend and backend engineering, API design, automated testing, CI/CD and monitoring that keep the product reliable and easy to change as requirements grow.
Products designed for AWS or other cloud platforms, with containers, managed databases, automated deployment, monitoring and auto-scaling, sized for your real traffic so cloud bills stay sensible.
AI features that add real value to your product, such as assistants trained on your content, smart search, document data extraction, recommendations and automated summaries, built with privacy and cost controls.
Public APIs for your customers, and integrations with payment providers such as Stripe, PayPal and Razorpay, CRMs such as HubSpot and Salesforce, accounting tools such as QuickBooks, Xero and Tally, messaging, maps and analytics services.
Functional, regression, cross-browser, device, performance and security testing, with automated tests for critical journeys so every release is safe to ship.
Production setup, monitoring and alerts, app store submission, phased rollouts, launch-day support and handover documentation.
Framework upgrades, architecture refactoring, cloud migration, performance fixes and UX redesign for existing products, delivered in stages without disrupting customers.
Bug fixes, security patches, dependency upgrades, uptime monitoring and a steady flow of new features under a monthly plan.
Not every SaaS feature belongs in version one. We prioritize the essentials for launch, then add advanced capabilities as your product and customer base grow.
Start with the core features
Add them as you grow
Build the foundation your first users need.
Help new users register, explore your product and reach value quickly.
Let companies invite colleagues and assign the right permissions.
Keep each customer’s data isolated with secure tenant access controls.
Collect recurring revenue with providers such as Stripe, Razorpay and PayPal.
Manage customers, subscription plans, accounts and support operations.
Understand user behavior and identify the features that drive retention.
Confirm important actions and bring users back with timely updates.
Expand capabilities as customer needs evolve.
Charge customers based on usage, seats, transactions or other pricing metrics.
Connect your product with customer systems and third-party applications.
Support enterprise identity management, access policies and activity tracking.
Customize the experience for different brands, markets and languages.
Let's prioritize the features your users need now and plan the right capabilities for future growth.
Most agencies only build software for others. We also build, sell and support our own products, so we know what happens after launch day.
SaaS Billing and Stock Management
Our GST billing and stock management software for small businesses and enterprises. It creates GST invoices with taxes calculated automatically and keeps billing, stock and payments in one place.
Microfinance Software
Software for microfinance and Nidhi companies that manages loans, savings, branches, agents and collections, with the right access for every level of the organisation.
What you receive
What you receive
What you receive
What you receive
What you receive
What you receive
What you receive
What you receive
We choose the stack based on your features, existing systems, expected traffic and who will maintain the code later, not on what is fashionable.
When we use them: Interactive dashboards, portals and SEO-friendly public pages
When we use them: Business logic, APIs, background jobs and integrations
When we use them: Business logic, APIs, background jobs and integrations
When we use them: Structured business data, reporting and caching
When we use them: Hosting, deployments, automation and uptime monitoring
When we use them: Online payments, subscriptions and invoicing
When we use them: Tracking user behaviour, conversions and product usage
When we use them: Chat assistants, content automation and smart search
We build against the OWASP Top 10 (2025), starting with broken access control and security misconfiguration:
Main law
DPDP Act 2023 and DPDP Rules 2025
Built into your product
Consent notices and withdrawal, breach procedures
Main law
CCPA/CPRA (California) and other state privacy laws
Built into your product
Privacy controls, data access and deletion requests
Main law
UK GDPR and EU GDPR
Built into your product
Consent, data minimization, regional data hosting
Main law
Privacy Act 1988
Built into your product
Collection notices, access and correction requests
Main law
Federal PDPL (Decree-Law 45 of 2021); DIFC and ADGM rules
Built into your product
Consent capture, cross-border transfer controls
We also build to WCAG 2.2 Level AA accessibility, which supports the ADA in the USA and the European Accessibility Act in the EU. Your legal adviser confirms the specific obligations for your product.
Modular code, a well-designed database, caching and cloud infrastructure that can add capacity as users grow.
We plan for the growth you expect over the next two to three years, so you are not paying for a million-user system on day one.
Our engineers use AI coding assistants for repetitive work such as boilerplate code, test cases and documentation, which shortens delivery time.
public function store(Request $request)
{
$data = $request->validate(['client_id' => 'required|exists:clients,id',
'amount' => 'required|numeric|min:0', ]);
}Every line is reviewed by a developer.
Your code and data are not shared with public AI tools without your permission.
Our engineers stay accountable for quality and security.
Step 01
We map users, the problem, competitors, risks and must-have features.
Typical time
1–2 weeks
Output
Product brief, estimate
Step 02
We test key assumptions and choose a proof of concept, prototype or MVP.
Typical time
About 1 week
Output
MVP scope, roadmap
Step 03
We design flows and screens and test a clickable prototype.
Typical time
2–3 weeks
Output
Approved prototype
Step 04
We choose the stack and design the data model, APIs and cloud setup.
Typical time
About 1 week
Output
Technical plan
Step 05
We build in two-week sprints and demo working software each sprint.
Typical time
4–8 weeks for an MVP
Output
Working product
Step 06
We test features, devices, performance and security.
Typical time
Throughout, plus 1 week
Output
Test reports
Step 07
We deploy, monitor and support the release.
Typical time
About 1 week
Output
Live product
Step 08
We review analytics and feedback and plan the next release.
Typical time
Ongoing
Output
Updated roadmap
Step 09
We add features, capacity and team members as the product grows.
Typical time
Ongoing
Output
Maintenance plan
How it works
Fixed-price sprint ending with a scope, roadmap and estimate
Best for
How it works
Agreed features, price and timeline, paid by milestone
Best for
How it works
Product manager, designer, developers and QA working only on your product, billed monthly
Best for
How it works
We act as your complete product and engineering team while you own the product decisions
Best for
Our team works from Kolkata, India (IST, UTC+5:30). Here is how our day lines up with yours:
Live overlap with our team
Your full business day
How we work together
Same-day calls and fast replies
Live overlap with our team
Your morning to mid-afternoon
How we work together
Daily stand-ups in your morning
Live overlap with our team
Your afternoon
How we work together
Calls in your afternoon; progress ready each morning
Live overlap with our team
Your early morning or our evening, by appointment
How we work together
Daily written updates and weekly demos; work continues while you sleep
Live overlap with our team
Full business day
How we work together
Calls, visits and workshops in Kolkata
A dedicated English-speaking product manager, sprint demos every two weeks over Zoom, Google Meet or Microsoft Teams
Shared Slack or Teams channel and a Jira board, so you can see progress any time
NDA before we start, and a contract that assigns all intellectual property to you
Code in your own Git repository and hosting in your own cloud account, in your region if needed
Invoices in USD, GBP, EUR, AUD, AED or INR, payable by bank transfer, Wise or PayPal
Milestone-based payments, so you only pay for work you have approved
Thefastbill and Nidhisoft give us first-hand experience of launching, selling, supporting and scaling software, not just building it.
We start with users, the problem and success metrics, and we will tell you when a feature is not worth building yet.
Product designers and engineers plan together, so what is designed can be built on time and on budget.
Discovery, MVP, scaling or modernization: the engagement matches where your product is today.
Source code, IP, designs, cloud and app store accounts are yours. No lock-in.
Working hours that overlap yours, contracts that protect you, and rates well below local agencies in the USA, UK, Europe and Australia.
Documented processes, code reviews and quality checks on every release.
Which products have you launched, and can I speak with one of those clients?
How do you decide what goes into the MVP?
How often will I see working software?
Who will actually work on my product, and will that team stay the same?
How do you handle security, privacy and quality?
Who owns the code, IP and accounts, and what happens if I move to another team?
What does support and growth look like after launch?
Red flags: a fixed price before anyone asks about your users, no discovery phase, no demos until the end, code kept on the agency’s own accounts, and a team that builds everything on your list without questioning any of it.
Have a SaaS idea, a platform concept or a product that needs a stronger next version?
Tell us:
We will recommend the right first step, whether that is a discovery sprint, a prototype, an MVP or a dedicated team, with a clear scope, timeline and price.
Talk to Our Product Development TeamWe recommend the right first step for you
Related services
Leelija Web Solutions Pvt. Ltd. is led by Safikul Islam, CEO. We are based in Barasat, Kolkata, India, and work with clients in the USA, UK, Europe, Australia, the UAE and India.
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Software product development services cover everything needed to turn an idea into a software product people use and pay for: discovery and validation, roadmap planning, UX/UI design, engineering, testing, launch, and ongoing improvement after launch. A software product development company handles these stages with one team, so decisions about users, design and code stay connected.
Custom software development builds a tool for one organization’s own use, and the project usually ends at handover. Software product development builds something for a market of users or customers, so it adds market validation, an MVP, a release roadmap, analytics and continuous improvement. Success is measured by adoption and revenue, not only by delivering the agreed features.
A discovery sprint starts from about US$1,500, a working MVP from about US$8,000 and a first SaaS release from about US$25,000, with separate rupee pricing for clients in India. Complex products with several platforms, heavy integrations or compliance needs cost more. Because our team is based in India, clients in the USA, UK, Europe, Australia and the UAE usually pay well below local agency rates. We give a fixed-scope quote after discovery. [CONFIRM prices]
Most MVPs take 8 to 14 weeks from kickoff to launch: about 2 weeks for discovery and scope, 2 to 3 weeks for design and prototype, and 4 to 8 weeks for development and testing. A simple MVP with one platform and few integrations can be faster; one with payments, multiple user roles or compliance needs takes longer. [CONFIRM]
A proof of concept tests whether something is technically possible, such as an integration or algorithm. A prototype is a clickable design that shows how the product will look and work, without real code behind it. An MVP is real, working software with only the essential features, released to actual users to test whether they need it and will pay for it.
Yes. We have built and run our own SaaS product, FastBill, GST billing and stock management software for small businesses and enterprises. For clients, we handle discovery, design, multi-tenant architecture, subscription billing, onboarding, admin dashboards, integrations, launch and scaling.
Most SaaS products need sign-up and onboarding, user and team accounts with roles, the core feature that solves the customer’s problem, subscription plans and payments, an admin dashboard, basic analytics, email notifications and secure tenant data separation. Usage-based billing, public APIs, SSO, white-labeling and advanced reporting can usually wait until after launch.
Yes. For startups we usually start with a 1 to 2 week discovery sprint, then a clickable prototype you can show to users and investors, then an MVP built so it can grow into the full product without a rewrite. We help prioritize features by what you need to learn first.
Outsourcing is usually faster and cheaper for getting a first version to market, because you get a complete team (product manager, designer, developers, QA) from day one without hiring. An in-house team makes sense once the product has traction and you need long-term, full-time ownership. Many clients start with us, then hire internally and keep us as an extended team.
Yes, with the right safeguards. We sign an NDA before you share details, assign all intellectual property to you in the contract, keep code in your own Git repository and hosting in your own cloud account, follow OWASP security practices and ISO 9001:2015 certified processes, and bill by approved milestone.
You do. The contract assigns all intellectual property to you, and the source code, designs, documentation, cloud accounts and app store accounts are set up in your name. Open-source libraries keep their own licenses, which we list at handover. [CONFIRM ownership terms]
Yes. A dedicated team works only on your product, typically a product manager, a designer, two to four developers and a QA engineer, billed monthly. You set priorities, join sprint reviews and can scale the team up or down with notice. [CONFIRM]
Our team is in India (UTC+5:30), so we share your full business day if you are in the UAE, your morning to mid-afternoon if you are in the UK or Europe, and your afternoon if you are in Australia. For US clients, we schedule calls in your early morning and send written updates daily, so work moves forward while you sleep.
Common choices include React and Next.js for web interfaces, React Native or Flutter for mobile apps, Node.js, Laravel or Django for the backend, PostgreSQL or MySQL databases, and AWS or other cloud platforms with Docker and CI/CD. We choose the stack based on your product’s needs and who will maintain it later. [CONFIRM stack]
Every change goes through code review and automated tests for critical features, with manual testing of key user journeys before each release. We build against the OWASP Top 10, use role-based access, encryption in transit, secure secrets and activity logs, and design data handling for the privacy laws that apply to your users, such as GDPR, CCPA, Australia
