Custom Web Application Development

From internal tools to customer portals—DEVLEGION builds modern web apps that are fast, secure, and designed to scale with your business.

Overview

We build web applications that solve real operational problems: customer portals, admin dashboards, booking systems, logistics tools, fintech platforms, and more.

Our focus is not just “building pages” — it’s building reliable systems: clean data models, secure access, maintainable code, and performance that stays strong as users and features grow.

If you need a partner that communicates clearly, ships consistently, and treats your product like a business asset (not a coding experiment) — you’ll feel at home with us.


Key Features

Everything you need to succeed

Frontend that feels premium

Responsive UI, fast interactions, accessible UX, and consistent components that speed up future development.

Backend that doesn’t panic under load

Well-structured APIs, caching, queue-based processing, and database design that scales.

Security by default

Proper authentication, authorization, audit trails, and best practices baked in from day one.

Clean delivery cadence

Weekly progress, transparent scope, predictable releases, and no "mystery delays".

Technology Stack

Cutting-edge technologies and tools we use to deliver exceptional results

React
Next.js
TypeScript
Node.js
NestJS
PostgreSQL
MongoDB
Redis
AWS
gcp
Hetzner

Our Process

A proven methodology that delivers results

1

Requirements & scope

Define roles, key workflows, integrations, and MVP milestones.

2

UI & architecture

Component plan + data model + API structure.

3

Build & iterate

Agile delivery with demos, feedback loops, and continuous improvement.

4

Launch & stabilize

Hardening, monitoring, performance checks, and rollout plan.

Transform Your Business

Let's discuss how we can help transform your business with our custom web application development services.

Contact Us