Web and mobile app development, from first release to scale
We design and build web platforms and mobile apps end to end: multi-vendor marketplaces, multi-tenant business platforms, data-heavy dashboards and native apps with on-device AI. You get one senior team from architecture to production, or engineers who join yours.
Send the role or the problem. Get 2-3 matching profiles or a short plan within one business day, or message us on WhatsApp.
MappOptimist is a web and mobile app development company based in New Delhi, India, delivering to clients worldwide. We build web platforms in React, Next.js and Angular with Node.js, Python or .NET backends, and mobile apps in Swift, Kotlin, React Native and Flutter. Our shipped work includes a UK multi-vendor marketplace, a US and Luxembourg property management platform and a native mobile keyboard with on-device AI.
Choosing a web and mobile app development company
A web and mobile app development company turns a product idea or a manual process into software that real users depend on: it designs the architecture, builds the web platform and the iOS or Android apps, tests and releases them, and keeps improving them after launch. When you compare companies, check the six points below. This is how we answer each of them.
Shipped products you can read
Ask for case studies close to what you are building. Ours include a multi-vendor B2B and B2C marketplace for a UK operator, a multi-tenant property management platform for a portfolio operator in the US and Luxembourg, and a native mobile keyboard with on-device AI.
Built for real users from release one
Payments, data, access and hosting are designed before the first screen. On the UK marketplace, payments, logistics and live inventory were part of the platform from the start rather than bolted on afterwards.
Native or cross-platform for a reason
A good partner explains the trade-off instead of defaulting to one stack. We use React Native or Flutter when one codebase is enough, and native Swift and Kotlin when speed, device features or on-device AI matter, as on the mobile keyboard.
Phased delivery you can review
Ask how often you see working software. We build in short iterations with code review and testing on every change; the property management platform was delivered module by module so value landed early.
A plan for after launch
Agree up front who runs the product once it is live. We deploy, monitor and keep improving it as a dedicated team, or hand over to your engineers with documentation.
Who you deal with, rates and hours
Your first conversation is with our founder, who runs delivery and client relationships directly. Our rates for eight web and mobile roles are published, and our engineers work in your time zone for US and UK clients.
Example: we built a multi-tenant property management platform on .NET Core, Angular and Power BI for a portfolio operator in the US and Luxembourg, replacing disconnected tools with one operational platform. Read the property platform case study.
Problems we solve
An idea that needs a production product, not a prototype
You need a platform that handles real users, payments and data from the first release, with an architecture that will not need rewriting when usage grows.
Operations running on disconnected tools
Spreadsheets, email and separate systems for bookings, inventory, tenants or orders. Every process needs manual reconciliation and nobody has one view of the business.
A mobile app that has to be fast and private
Users expect instant response on low-end devices and do not want their data leaving the phone. That rules out a thin wrapper around a server API.
An in-house team that cannot ship fast enough
The roadmap is full, hiring is slow and every new feature waits for the same few engineers.
What we build
Marketplaces and commerce platforms
Multi-vendor B2B and B2C marketplaces with vendor onboarding, integrated payments, live inventory, logistics tracking and catalogue search. Our UK marketplace runs on React, Node.js, MongoDB and Elasticsearch on AWS, with Stripe payments.
Enterprise and multi-tenant web platforms
Business platforms with role-based access, audit logging and reporting built in. Our property management platform for a portfolio operator in the US and Luxembourg is built on .NET Core, Angular, Azure, SQL Server and Power BI.
Native and cross-platform mobile apps
iOS apps in Swift, Android apps in Kotlin, and cross-platform apps in React Native and Flutter. We shipped a native mobile keyboard with on-device TensorFlow Lite models, so typing stays fast and private.
Dashboards and data-driven web apps
React and TypeScript front ends over Node.js or Python APIs for operational platforms: live shipment tracking and exception alerts for a logistics operator, and early-warning dashboards for an education institution.
AI features inside your product
Recommendations, prediction, document reading or agent workflows added to web and mobile products where they solve a real problem, backed by our AI engineering practice.
UI/UX, QA and ongoing development
UI/UX designers and design systems, QA and test engineers for web and mobile, and continued development after launch as a dedicated team or individual engineers.
How an engagement runs
- Step 01
Discover
We map the users, workflows, data and constraints, agree the first release and what can wait, and flag technical risks early.
- Step 02
Architect
Stack, data model, integrations, hosting and security are designed as one plan, sized for the growth you expect rather than for the demo.
- Step 03
Engineer
Senior engineers build in short iterations with working software you can review regularly, with testing and code review on every change.
- Step 04
Launch and scale
We deploy, monitor and keep improving the product, or hand over to your team with documentation and a clean codebase.
Ways to work with us
End-to-end product build
A managed team takes the product from discovery to production against a scope and outcomes you agree. Every web and mobile case study below was delivered this way.
Dedicated product team
A cross-functional squad with a team lead (frontend, backend, mobile, QA and design as needed) that works on your roadmap long term.
Individual developers
React, Node.js, .NET, iOS, Android, React Native or Flutter developers who join your team on a monthly rolling basis.
Need individual engineers rather than a project? See the roles you can hire and their rates.
Indicative hourly rates
From our 2026 Web & Mobile Development rate card, in USD per hour.
| Role | 2-3 years | 4-6 years | 6+ years |
|---|---|---|---|
| Frontend Developer (React / Angular / Vue) | $30/hr | $36/hr | $42/hr |
| Backend Developer (Node / Python / Java / .NET) | $32/hr | $38/hr | $46/hr |
| Full-Stack Developer | $34/hr | $42/hr | $50/hr |
| Mobile Developer - iOS (Swift) | $34/hr | $42/hr | $50/hr |
| Mobile Developer - Android (Kotlin) | $34/hr | $42/hr | $50/hr |
| Cross-Platform Developer (React Native / Flutter) | $32/hr | $40/hr | $48/hr |
| UI/UX Designer | $30/hr | $36/hr | $42/hr |
| QA / Test Engineer (Web & Mobile) | $28/hr | $34/hr | $40/hr |
Rates are indicative and confirmed per engagement scope, duration and resource availability. Fixed-scope builds are quoted after discovery. Estimate your monthly and yearly cost →
Technology we work with
Case studies
Global Gate Marketplace
A full multi-vendor marketplace connecting B2B and B2C buyers and sellers on one platform, with payments, logistics and live inventory built in.
Read the case study →Enterprise · PropTechProperty Management System
A multi-tenant platform that unifies leasing, operations and finance for property portfolios.
Read the case study →Consumer AIAI-Powered Mobile Keyboard
On-device language intelligence for fast, private, multilingual typing.
Read the case study →AI / ML · LogisticsLogistics Management Bot
Intelligent tracking, routing and exception handling across the logistics chain.
Read the case study →AI / ML · EdTechAI Student Management System
A learning operations platform that flags at-risk students early and personalises support.
Read the case study →AI Agents · HealthcareHospital Management Agentic System
AI agents that coordinate hospital scheduling, records and workflows under staff control.
Read the case study →Frequently asked questions
What kinds of web and mobile products have you built?
Our published work includes a multi-vendor B2B and B2C marketplace in the UK, a multi-tenant property management platform for an operator in the US and Luxembourg, a native mobile keyboard with on-device AI, a logistics tracking platform, an AI student management system and an agentic hospital management system in the US. Each was an end-to-end build.
Which technologies do you use?
On the web, React, Next.js and Angular with TypeScript, over Node.js, Python, .NET or Java backends. On mobile, Swift for iOS, Kotlin for Android, and React Native or Flutter for cross-platform apps. We host on AWS or Azure. We pick the stack for your product, team and hiring plans rather than defaulting to one.
Native or cross-platform: which should we choose?
Cross-platform (React Native or Flutter) is usually the faster and cheaper route when one codebase can meet your needs. Native Swift and Kotlin make sense when performance, device features or on-device AI matter most, as with the mobile keyboard we built in native Swift and Kotlin, where latency and privacy meant models had to run on the device rather than in the cloud.
How much does web or mobile development cost?
Individual developers are billed per hour by role and experience; for example, a Full-Stack Developer is $34/hr at 2-3 years, $42/hr at 4-6 years and $50/hr at 6+ years on our 2026 rate card. Fixed-scope products are quoted after a short discovery, once the first release is defined.
Do you build web and mobile apps for companies in the US and UK?
Yes. Our published work includes a multi-vendor marketplace for a UK operator and a multi-tenant property management platform for a portfolio operator in the US and Luxembourg. Our engineers work from New Delhi in your business hours for US and UK clients, and your first call is with our founder. You can engage an end-to-end product team, a dedicated team or individual developers.
Can you take over or extend an existing app?
Yes. We start by reviewing the codebase, architecture and deployment, flag the risks we find, and agree whether to extend, refactor or rebuild parts of it before adding features.
Tell us what you are building
A new product, a platform to replace spreadsheets or developers for an existing app: share the idea and we will come back within one business day with how we would approach it.