Custom Applications Built to Perform at Scale
Off-the-shelf software fits the average business, not yours. Jspace builds custom web applications and native mobile apps from the ground up, shaped around how your team and your customers actually work. Using React, Next.js, and React Native, we deliver performant, maintainable codebases that start right for where you are now and are built to handle where you are going next.
What we focus on
Product discovery and architecture
Before writing a line of code, we map your user flows, data model, and integration requirements so the architecture supports the product you actually need, not a generic template.
Performance-first frontend engineering
We build with Core Web Vitals, server-side rendering, and progressive enhancement as defaults - not afterthoughts - so your application is fast from day one.
Native mobile with shared logic
React Native lets us share business logic between iOS and Android while keeping native performance and platform-specific UI patterns that users expect on each device.
Scalable backend and API design
We build RESTful and GraphQL APIs with authentication, rate limiting, and data validation baked in, designed to serve both your web app and mobile clients from a single layer.
Key capabilities
- React and Next.js web applications with SSR/SSG
- React Native iOS and Android mobile apps
- TypeScript throughout for type-safe, maintainable code
- Authentication, roles, and permissions systems
- CI/CD pipelines and cloud deployment (AWS, Vercel, GCP)
- Accessible, WCAG-compliant UI across all platforms
Applications we build
Internal workflow application
SMBs relying on spreadsheets and email chains to manage approvals, task tracking, or reporting gain a purpose-built internal tool that enforces consistent processes, reduces manual errors, and gives managers visibility in real time.
Booking and reservation app
Service businesses managing appointments, equipment rentals, or venue bookings through phone or email lose revenue to scheduling conflicts and manual overhead. A custom booking app automates availability, confirmations, and reminders while fitting the specific rules of the business.
B2B customer portal
Manufacturers and distributors whose B2B clients still call or email to check order status, invoices, or product availability can deflect that support load by giving clients a self-service portal built around their specific account and product data.
Field service mobile app
Companies with mobile technicians or field agents using paper forms or fragmented phone communication can replace that with a React Native app that works offline, captures structured job data, and syncs back to the central system when connectivity returns.
Frequently asked questions
How much does it cost to build a custom web or mobile app?
Cost depends on the scope - number of screens, integrations, and how novel the business logic is. Simple internal tools can be delivered in weeks; full consumer-facing products take months. We provide a detailed estimate after a free scoping call, and we give you a fixed scope rather than an open-ended engagement.
Can you build both iOS and Android from a single codebase?
Yes - we use React Native for cross-platform mobile development, which shares the core business logic between iOS and Android while keeping native UI components on each platform. For applications with very demanding graphics or device-specific requirements, we evaluate whether native development makes more sense and advise accordingly.
How long does it take to develop a custom application?
A focused internal tool or MVP with a clear scope typically takes 8 to 16 weeks. Consumer applications with more complex features take longer. The single biggest factor is how clearly the requirements are defined at the start - our discovery process is designed to resolve ambiguity before development begins.
Do you take over maintenance after the project launches?
Yes - we offer ongoing maintenance and support engagements after delivery, covering bug fixes, dependency updates, and incremental feature development. We document our code to a level where your internal team can take over if you prefer that path.
Can you integrate the app with our existing systems?
Integrating with existing ERPs, CRMs, payment gateways, or third-party APIs is standard for most projects we build. We design the backend API layer to serve both the new application and any other systems that need access to the same data.
Ready to build the right application?
Share your requirements and we'll put together a scope, timeline, and architecture recommendation at no charge.
Start your project