Custom web apps.
Fast, reliable, and production ready.
We build custom web apps that run your business. Launch SaaS products in four weeks with clean code, fast databases, and zero monthly builder fees.
110+ Web Apps Shipped
Agencies take six months and burn budgets on slow codebases. Generic no-code tools lock your data and break under real visitor loads.
We build clean web apps using Astro 5, React, Bun, and PostgreSQL. We ship working software every week on fixed-scope milestone agreements.
Production SaaS MVPs in four weeks, sub-50ms API responses, 100% code ownership, and zero recurring platform fees.
Performance numbers.
Clean TypeScript code and indexed database queries built for speed.
From concept to production SaaS
Fast PostgreSQL database queries
Zero platform lock-in fees
Fast loading for all screens
What we build.
SaaS MVP Platforms
Production web apps delivered in four weeks with user signups, Stripe billing, and database tables.
- Clean signup and password reset flows
- Stripe portal and subscription sync
- Transactional emails with instant delivery
Client Portals
Private portals where your enterprise customers access files, track tasks, and review invoices.
- Isolated accounts and team permissions
- Direct file uploads to secure cloud storage
- Activity feeds and complete audit logs
Collaboration Apps
Interactive web tools where teams collaborate with live document edits, notifications, and chat.
- Websocket sync for live team editing
- User indicators showing live active presence
- Instant alerts and custom email notifications
Database Architecture
Relational database models in PostgreSQL engineered for high concurrency and fast search queries.
- Normalized tables with strict data constraints
- Redis cache for instant query responses
- Schema migrations with safe rollback scripts
Subscription Engines
Recurring payment systems with automated tier upgrades, prorated billing, and invoice receipts.
- Stripe Checkout with automated webhooks
- Tier management for seat and plan upgrades
- Tax calculations and automated receipt delivery
CI CD Pipelines
Deployment pipelines that run tests, build assets, and update cloud servers on every code push.
- Automated testing before production updates
- Container builds with zero downtime reloads
- Branch previews for team testing and review
How we compare.
FixrWeb custom engineering versus no-code tools and slow agencies.
Feature Architecture spec | FixrWeb Custom Apps Full-stack TypeScript | No-Code or Bloated Agency Generic templates and lock-in |
|---|---|---|
Development Speed Time to first release | First version in two weeks, full launch in four weeks | Three to six months of meetings before writing code |
Page and API Speed Response latency | Sub-50ms API queries and fast mobile loads | Multi-second wait times from heavy script bloat |
Monthly Costs Ongoing software fees | 100% owned code with cloud bills under $20 monthly | Hundreds or thousands of dollars in monthly seat fees |
Code Ownership Asset control | Full source code delivered in private Git repository | Closed systems where you cannot export the codebase |
Database Scalability Data capacity | Dedicated PostgreSQL database scaling to millions of rows | Strict row limits that crash or force expensive upgrades |
Custom Logic Freedom Business rules | Any custom calculation, external API, or workflow rule | Rigid visual blocks that prevent custom business logic |
Before and after.
Real performance comparison from rebuilding a legacy business app.
Application Performance Audit
Legacy stack replaced · Tested under 500 concurrent users
Site upgrades.
How we modernize slow legacy applications and replace fragile no-code setups.
Monolith Refactoring
Break slow monolithic codebases into modular services with clean TypeScript APIs and clear data contracts.
Database Tuning
Restructure unindexed tables, add Redis caching, and eliminate slow joins to speed up database queries.
No-Code Migration
Convert fragile no-code setups into full-code web applications that you own completely.
Automated Testing
Add end-to-end integration tests that run before every release to stop bugs from reaching production.
How we work.
From user requirements to production cloud launch and warranty support.
Specification
We define user flows, database models, and API endpoints before writing any application code.
Architecture
We set up database schemas, authentication services, and component design tokens in TypeScript.
Engineering
We build application screens, business logic, and third-party integrations with clean tested code.
Testing
We test API response times, verify edge security rules, and confirm mobile responsiveness.
Launch
We deploy to production cloud servers, set up automated daily backups, and hand over source code.
Built-in security.
Strict protection for user accounts, data models, and API endpoints.
Access Control
Granular permission checks verify that users only read and edit data belonging to their organization.
Encrypted Sessions
HttpOnly cookies and Argon2 password hashing protect user sessions against session hijacking.
Input Validation
Parameterized SQL queries and input schemas block SQL injection, cross-site scripting, and forged requests.
Vulnerability Scans
Continuous dependency audits check every code library for security advisories before deployment.
Tools we use.
Modern web frameworks, fast runtimes, and dependable databases.
Server-rendered HTML delivery with fast initial page load and zero unnecessary client JavaScript.
Interactive UI components loaded only where dynamic state or customer interaction is needed.
High-speed JavaScript runtime that executes backend code and API requests with low memory usage.
Strict end-to-end type safety connecting database models to frontend forms to eliminate runtime bugs.
Relational database engineered for complex queries and reliable financial data storage.
Lightweight utility styling that produces tiny CSS file sizes and responsive layouts across devices.
What you receive.
Transparent deliverables with complete source code ownership and documentation.
100% code ownership
Private Git repository with full commit history, documentation, and zero recurring license fees.
Automated test suite
End-to-end Playwright tests that verify core business workflows before every deployment.
Cloud infrastructure
Docker containers and deployment scripts ready to host on AWS, Cloudflare, or DigitalOcean.
30-day warranty
Direct engineer support with fast bug resolution after your application goes live.
Related guides.
Technical guides, cloud hosting setups, and specialized engineering services.
Managed Cloud Hosting
Fast cloud hosting with automatic updates, server backups, and twenty-four-seven monitoring.
Core Web Vitals Tuning
Tuning server response times, script payloads, and Core Web Vitals for maximum performance.
Website Security Hardening
Web application firewall protection, bot defense, and vulnerability patching for web systems.
Technical SEO Audits
Schema markup, crawl optimization, and structured metadata for search engine indexing.
Custom WordPress Development
Custom content management websites engineered for speed and editorial flexibility.
Landing Pages & Funnels
High-converting sales funnels with server tracking and fast mobile checkout flows.
Simple pricing.
Predictable milestone pricing for every product stage.
Starter App Sprint
Interactive UI prototype, relational database schema, and API contracts for your product concept.
Clickable prototype & schema
- Interactive UI screen layouts
- PostgreSQL database schema design
- Auth and session architecture
- API specification & data contracts
Complete SaaS MVP
Full-stack SaaS app built in four weeks with Astro 5 SSR, React Islands, auth, and Stripe billing.
Full-stack build · 4 weeks
- Astro 5 and React full-stack build
- Stripe subscription billing engine
- User authentication & access roles
- Automated transactional email setup
Custom Portal & Cloud
High-volume B2B client portal with role permissions, real-time collaboration, and automated testing.
Multi-tenant portal · enterprise
- Multi-tenant customer portal
- Role-based permission controls
- Direct cloud file uploads to S3
- Automated test suite & CI/CD
Custom App Plan
Single module build, database schema optimization, auth bug fix, or custom UI component.
Deliverable: Custom scope · Direct engineer support
Common questions.
Everything you need to know about our custom application engineering process, timelines, and guarantees.
Speak directly with our lead engineer about your application architecture, timeline, or custom requirements.
Talk to us01 How fast can you launch a working SaaS MVP?
02 What technologies do you use for custom web applications?
03 Do you charge fixed milestone fees or hourly rates?
04 Who owns the software and code after the project finishes?
05 Can you migrate our app from a no-code tool like Bubble?
06 How do you keep customer data safe and secure?
07 Can you connect our application to Stripe and other payment tools?
08 How do you make sure the application stays fast under high traffic?
09 Can our in-house developers maintain the codebase after launch?
10 What happens if a bug appears after launch?
11 Can you integrate our web app with external third-party APIs?
Ready to build your web app?
Launch your product in four weeks.
Schedule a technical review with our lead engineer. We review your requirements and provide an architecture plan, fixed quote, and launch timeline within 48 hours.