Custom Web Application Development
We engineer bespoke web applications with React, Next.js, and Node.js that map precisely to your business workflows. Every build ships with automated testing, CI/CD pipelines, and Core Web Vitals scores above 90.
Web App
Web Development
Modern web applications built for speed, SEO, and scale.
We craft responsive, accessible, and secure web apps using the latest frameworks — optimized for Core Web Vitals, search rankings, and user engagement.
Our Offerings
Web Development Services We Provide
Enterprise Web Portals
Role-based portals for employees, vendors, and customers with SSO, granular permissions, and audit trails. Our portals routinely cut internal ticket volume by 30-40% by putting self-service front and center.
CMS Development
Headless and traditional CMS builds on WordPress, Strapi, Sanity, and Contentful so marketing teams can publish without engineering tickets. We migrate legacy content with zero SEO loss using 301 mapping and structured data.
Website Redesign & Revamp
We modernize dated websites with responsive design, accessibility (WCAG 2.1 AA), and performance budgets enforced in CI. Clients typically see bounce rates drop 20-35% within the first quarter post-launch.
Web Performance Optimization
Lighthouse audits, image and bundle optimization, edge caching, and database query tuning to get pages loading in under 2 seconds. Faster pages convert better — a 1-second improvement lifts conversions by up to 7%.
Web Application Security
OWASP Top 10 hardening, penetration testing, dependency scanning, and GDPR-compliant data handling baked into every release. We implement CSP headers, rate limiting, and encrypted storage as standard, not extras.
What We Deliver
End-to-End Web Development
- Responsive design
- SEO optimization
- Performance tuning
- CMS integration
- Auth & payments
- Analytics setup
Why Choose Devlex
Business Outcomes That Matter
✓Higher search rankings
✓Better conversion rates
✓Mobile-first experience
✓Easy content management
Technologies
Tools & Stack We Use
We pick the right technology for your goals — not the trendiest framework.
- React
- Next.js
- Vue
- Node.js
- WordPress
- Tailwind
Our Approach
- Discover — Understand goals & constraints
- Design — Architecture & UX blueprint
- Build — Agile sprints with weekly demos
- Launch — Deploy, test & support
0Years of Experience
0Projects Delivered
0Global Clients
0In-house Experts
0Countries Served
0Client Retention
“They took over a half-finished React Native app another agency had abandoned, stabilized it in six weeks, and shipped the features our investors were waiting on. The code audit they delivered in week one was worth the engagement on its own.”
“As a Mumbai-based startup we evaluated a dozen agencies before choosing Devlex for our logistics SaaS. They built the MVP in ten weeks, helped us close our seed round with a working product, and now run our entire engineering function.”
“Devlex designed and built our analytics dashboard handling over 2 million events a day, with role-based access our enterprise clients demanded. Their UX work alone lifted our trial-to-paid conversion by 22%.”
FAQ
Web Development — FAQs
Everything you need to know before starting your project. Still have questions? Talk to our team.
Everything from marketing sites and corporate portals to complex SaaS platforms, customer dashboards, and booking systems. Our stack covers React, Next.js, Vue, Angular on the front end and Node.js, Python, .NET, and PHP/Laravel on the back end. We have delivered 25+ projects across healthcare, fintech, logistics, and retail.
A marketing website typically takes 4-8 weeks, while a custom web application runs 3-6 months depending on integrations and feature depth. We work in 2-week sprints with a demo at the end of each, so you see working software from week two onward.
Business websites generally fall between $8,000 and $25,000, while custom web applications range from $25,000 to $80,000+. Hourly engagements start at $18/hour, and a dedicated full-time developer starts at $2,600/month. We provide a fixed quote after a free scoping call.
You do, 100%. Every contract includes full IP transfer on final payment, and we hand over the complete Git repository, documentation, and deployment credentials. We also sign NDAs before any discovery work begins.
Yes — every project includes 60-90 days of free bug-fix support, and most clients move to a monthly maintenance plan covering updates, monitoring, and security patches. Our 24/7 support desk maintains a 4-hour response SLA for critical issues.
We deploy to AWS, Azure, Google Cloud, or Vercel depending on your needs, with infrastructure-as-code so environments are reproducible. CI/CD pipelines push tested code to staging automatically, and production releases are zero-downtime with instant rollback.
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