Web development · Three Index
Web applications that hold up in production.
We design and build custom web applications, portals and platforms — from the interface to the API — for teams that need software that stays reliable after launch.
- Team
- 50+ IT professionals
- Delivery
- Design, build, release, support
- Engagement
- Project or dedicated team
What this covers
Concrete work we take on under web development — not a catalogue of buzzwords.
Multi-page product sites with authenticated areas
Progressive web apps where offline or installability matters
Rebuilds of legacy PHP or jQuery systems into modern stacks
Problems we take on
If one of these sounds familiar, we have likely shipped something close — and we will say so if we have not.
Off-the-shelf tools force awkward workarounds for your real process.
An old codebase is too fragile to extend safely.
You need a web product, not a marketing site with a form.
Who this is for
This is for product and operations leaders who need a web application their team will use every day: portals, admin tools, authenticated product areas, and internal workflows that off-the-shelf software keeps bending out of shape.
The buyer is usually a founder, CTO, or operations lead who has already outgrown spreadsheets or a fragile internal tool. They want a named team that can scope the product, build it, and leave it in a repository their own engineers can run.
How an engagement starts
Written scope
We start from the jobs the software has to finish, not from a stack preference. The written scope names the users, the first workflows, the integrations, what is deferred, and how the first increment will be judged on staging.
First increment
The first release is a vertical slice someone can click through: sign-in, one real workflow, and the data it depends on. Later increments widen that slice. Change that was not in the written scope is quoted before it is coded.
Decisions we make with you
A server-rendered application fits content-heavy products and teams that want fewer moving parts at the edge.
A client-heavy application fits dense, interactive tools where the browser holds a lot of state.
We pick one primary shape and stay with it unless the product forces a split.
A rebuild of a PHP, jQuery, or monolith system is staged so the current product stays in use. A full replacement in one release is the right call only when the old system can be frozen. Most teams keep shipping on the old path while the new path takes over one workflow at a time.
What you own
You own the repository, the cloud account, the domains, and the credentials. Environments, CI, and a short operator note travel with the code so a release is a pipeline run, not a developer sitting at a terminal.
- You own
- Repository
- You own
- Cloud account
- You own
- Domains
- You own
- Credentials
Where this shows up
The same delivery shows up in products that look different on the surface and share a web application underneath. Clinical review, property catalogues, and financial operations all need roles, auditability, and a backend the interface can trust.
Further reading
Building production web apps that outlast the launch
Stack choice and what has to be true after launch.
ReadMigrating legacy systems without a big bang
If the current system is the problem. This is the longer note on staging a replacement while the product stays up.
ReadTechnologies
Stacks we use when they fit the product and your team — not a mandatory toolkit for every engagement.
- Stack
- React
- Stack
- Next.js
- Stack
- Vue
- Stack
- Angular
- Stack
- Node.js
- Stack
- Python
- Stack
- Laravel
- Stack
- PostgreSQL
How we work
Scope first, named engineers, biweekly demos, and you keep the repo.
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Scope before code
We write what is being built, what is excluded, integrations, dates and cost basis before the build starts. Changes get quoted before they get coded.
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Talk to the people doing the work
You meet named engineers and designers. There is no account manager translating technical questions in both directions.
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Working software every two weeks
Increments land on staging you can open and use. Progress you can click on beats progress in a status report.
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You own everything
Repository, cloud account, domains and credentials stay yours. We work in your accounts wherever possible.
FAQ
Answers specific to web development — stacks, engagement and what we actually ship.
Do you build marketing websites?
We build product and platform web apps. Simple brochure sites are usually better handled by a specialist web studio — we will say so if that is the better fit.
Which stack do you use?
We pick the stack that fits the product and your team. React/Next.js and Node or Python are common; Vue, Angular and Laravel are available when they are the right choice.
Can you rebuild a legacy web app?
Yes. We often migrate fragile PHP, jQuery or monolith systems into modern stacks in stages so you keep shipping while the foundation improves.
Do you handle authentication and roles?
Yes — SSO, role-based access and admin tools are common parts of the portals and platforms we ship.
How do you approach hosting and deployment?
We set up CI/CD and environments in your cloud account. You own the infrastructure; we make releases routine and observable.
Related
Services that often sit beside web development on the same roadmap.
Why Three Index
AI-first software development company in Ahmedabad. Founded 2020. Fifty-plus IT professionals. Five hundred-plus projects shipped.
We are a software engineering company: large enough to staff serious products and small enough that the people who wrote a module can still explain it. See how we operate, our AI development work, browse case studies, read the FAQ, or join the team.
Tell us what you are trying to build.
Send a short description of the project. You will get a reply from someone technical — with questions worth answering, not a brochure.