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Web application tech stack — React, Next.js, Node.js, PostgreSQL, AWS

Custom Web App
Development

Need more than a website? We build the software behind the business: customer portals, SaaS products, internal platforms, dashboards, marketplaces, and custom web applications.
Web application development services — scalable React, Next.js and Node.js apps
Web app development process — discovery, architecture, development, deployment
Clutch top react developers
Clutch top software developers
Responsive
SubWise logo
Upwork logo
Nexi logo
Audi logo
Finverse logo
Nordisk Regnskab logo
Chainweb client logo
Avon logo
Ecoverde logo
Condominio 24 logo
Upwork logo
Nexi logo
Finverse logo
Nordisk Regnskab logo
Chainweb client logo
Audi logo
Avon logo
SubWise logo
Ecoverde logo
Condominio 24 logo
What We Build
Web app development process — discovery, architecture, development, deployment

Fintech

Digital finance that feels effortless and secure

We build payment flows, transfers, wallets, and investment tools, with the parts users never see but always feel: transaction integrity, bank and PSP integrations, KYC and AML checks, and audit trails. Balances reconcile, payments do not disappear, and the system stays compliant when a regulator asks.
  • Starting from

    3 months

  • Starting from

    $ 7000

CRMs

Systems that bring order, not extra complexity

We build CRMs around how your team actually sells, not around a template. Lead pipelines, deal stages, customer history, role-based permissions, and automated tasks that remove manual data entry. It connects to the tools you already use, so nobody has to copy information between systems.

  • Starting from

    1 month

  • Starting from

    $ 5000

MVP web application development — launch-ready in 8-12 weeks
Scalable web application architecture — microservices and cloud infrastructure

Messenger

Communication that feels instant and seamless

We build real-time messaging with private chats, groups, push notifications, media sharing, and read states. The hard part is delivery under load, so we handle message ordering, offline queues, and reconnection. Users just type and send.

  • Starting from

    1 month

  • Starting from

    $ 3000

Marketplace

Connecting buyers and sellers through clean, intuitive flows

We build two-sided platforms: listings, search and filtering, seller dashboards, order flow, reviews, and payment handling with escrow or split payouts. Buyers find what they need quickly, sellers manage inventory and orders without support tickets.
  • Starting from

    1 month

  • Starting from

    $ 2000

Custom web application example — enterprise-grade frontend by Chainweb Group
Web application tech stack — React, Next.js, Node.js, PostgreSQL, AWS

SaaS

Tools that simplify workflows and support real productivity

We build subscription products end to end: onboarding, multi-tenant architecture, role and permission levels, usage dashboards, billing integration, and an admin panel you can run without a developer. Built so that adding your next hundred customers does not mean rebuilding the foundation.

  • Starting from

    3-5 months

  • Starting from

    $ 7000

Healthtech

Digital healthcare built on trust and precision

We build appointment scheduling, patient records, telemedicine, and health tracking, with GDPR compliance and data protection handled from the first line of code rather than added later. Sensitive data stays encrypted, access is logged, and we sign a Data Processing Agreement.
  • Starting from

    3 months

  • Starting from

    $ 7000

Web application development services — scalable React, Next.js and Node.js apps

What you get

Architecture that survives growth, not a prototype that breaks at 100 users
Front-end and back-end built to your business logic, including the edge cases AI tools skip
UI/UX design that drives conversion and retention
API development and integrations with payment providers, CRMs, and any external service
QA and testing across browsers and devices, before your users find the bugs
Ongoing support and scaling as your product grows

Our tech stack

From First Call to Live Product

Four steps, each ending in something you can actually see. Already started and stuck somewhere in the middle? We join at that step instead of the first one.

Discovery & Strategy

We map your idea, or audit what you already built. We define the scope, the users, and what stays out of version one.

✓ Fixed scope and timeline
01
02

Design & Prototyping

User flows, wireframes, and the interface. You see and click the product before a single line of code is written.

✓ Clickable prototype

Development & Integration

Front end, back end, database, and integrations. Built in sprints, with a working version you can check at the end of each one.

✓ Weekly builds you can use
03
04

Testing, Launch & Support

Tested across browsers and devices, deployed to your infrastructure, with documentation and support after go-live.

✓ Live product, code is yours
AI integration
Web App Development
Need AI in Your Web App Too?
Need an AI feature added to your web app?We build that.
Already have an AI integration that's not working right?We fix that too.
All data handling, including AI features, is GDPR-compliant by default.
See AI Development & Integration →

FAQ

Common Questions

Web App Development

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    Chiara Mastino
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