Booking systems
When phone bookings and spreadsheets cost you customers, we build a booking system that knows your capacity, prices and rules — and takes bookings while you work.
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We build booking systems, integrations, internal tools and customer portals for Danish SMEs — with a fixed quote within 48 hours and average delivery in 18 days.
Reply within 24 hours — usually same day
Custom software development is the design, build and operation of software created from scratch for one company’s specific needs — as opposed to off-the-shelf systems, where the company adapts to the software. A custom system mirrors your actual workflows, integrates with the tools you already use, and you own the code. It typically pays off when standard solutions require expensive customisation, manual workarounds or licences for features you never use. TwinCurrent delivers custom software with a fixed quote, weekly demos and post-launch operations.
Concrete deliverables — not timesheets.
Full source code, documentation and deployment setup handed over to you. No vendor lock-in — you can take the code anywhere, anytime.
C#/.NET, React/Next.js, TypeScript and Azure — the same technologies large companies build on, delivered by two engineers with no layers of project managers in between.
Scope, price and plan are locked in the quote before we write the first line of code. Changes are agreed openly along the way — never as surprises on the invoice.
Danish contract, data processing agreement and EU hosting. We build GDPR in from the start instead of patching it on afterwards.
Monitoring, bug fixes and continuous development as managed engineering — so the system keeps working two years from now, not just at launch.
Four typical situations where a custom system pays for itself.
When phone bookings and spreadsheets cost you customers, we build a booking system that knows your capacity, prices and rules — and takes bookings while you work.
When staff type the same data into two systems, we build the integration that moves it automatically between your ERP, CRM and accounting system.
When a core process lives in a spreadsheet only one person understands, we replace it with an internal tool the whole team can use — with permissions, history and backups.
When customers call to ask for order status, we build a self-service portal with orders, documents and invoices — and free up the hours in your support.
Four steps from first meeting to operations — the same process on every project.
A no-obligation meeting where we map needs, workflows and existing systems. Online — or on-site if you are based in the greater Copenhagen area.
You receive a written quote with a fixed price, concrete scope and a delivery date — within 48 hours of the meeting.
You see working software every week and can adjust direction while course corrections are still cheap.
We launch, hand over code and documentation — and gladly keep running the system with monitoring, bug fixes and further development.
No invented testimonials — just numbers and delivered systems.
TwinCurrent delivers custom software projects in 18 days on average.
Our prices are typically 65% below what enterprise agencies charge for comparable work.
98% client satisfaction across delivered projects.
TwinCurrent has received a Mikrolegat grant from the Danish Foundation for Entrepreneurship (Fonden for Entreprenørskab).
A legacy PHP monolith refactored into a clean Laravel MVC application and deployed on Microsoft Azure — without interrupting the webCRM and Planorama synchronisation.
Read the case studyThe central platform for International Business & Politics at CBS — events, note bank, career hub and book marketplace, built on React, Node.js and PostgreSQL.
Read the case studyWe don’t publish list prices, because no two projects are alike. But once quoted, the price is fixed. Three factors matter most:
The number of screens, roles and workflows the system must support. A focused first release is almost always cheaper and better than building everything at once.
How many external systems we need to talk to — ERP, CRM, accounting, payments — and how well documented their APIs are.
Business rules, calculations and requirements for security and performance. The more logic that has to be 100% correct, the more testing and care it takes.
Because we are two engineers with an AI-based toolchain — not an agency with project managers and middle layers — our prices are typically 65% below what enterprise agencies charge. You get an estimate within 24 hours, and a fixed written quote within 48 hours of the scoping meeting.
Get an estimate within 24 hoursThe price depends on scope, integrations and complexity — which is why we give you a fixed written quote within 48 hours of a scoping meeting instead of a list price. A focused internal tool costs considerably less than a customer portal with payments and multiple integrations. Because we are two engineers without agency overhead, our prices are typically 65% below what enterprise agencies charge for comparable work. The quote is fixed: the price does not change along the way unless you change the scope.
Choose the off-the-shelf system when your needs are common and you can live with its workflows — that is the fastest and cheapest option. Custom software pays off when the standard solution requires expensive customisation, when staff build manual workarounds in spreadsheets, or when licences cover features you never use. A good rule of thumb: if the system supports a process that is a competitive advantage for you, you should own it. If the process is standard, rent it.
Our average delivery time is 18 days from approved quote to production-ready software. The quote includes a concrete delivery date, and you see working software at weekly demos along the way, so there are no surprises at the end. Larger systems are split into releases so the most important functionality goes live first.
You own the code and are free to take it to another vendor. Most clients, however, choose to let us keep running the system as managed engineering: we monitor operations, fix bugs, keep dependencies up to date and develop the system further. It is a rolling agreement without long lock-in — and it means the system still works and evolves two years on, not only at launch.
C#/.NET and React/Next.js with TypeScript, hosted on Microsoft Azure — the same stack large Danish companies build their core business on. That means any competent developer can take over the code, and the system can grow with you. The difference is the process: two engineers with an AI-based toolchain instead of an agency with developers behind layers of project managers. The same stack as enterprise — without the enterprise process.
Yes. TwinCurrent is a software studio in Copenhagen, and we are happy to hold scoping meetings and demos on-site in the greater Copenhagen area. We cover the rest of Denmark online — weekly demos happen over video anyway, so you can follow the project closely regardless of postcode. Contract and data processing agreement are available in Danish.
Tell us what steals time in your day-to-day — and we will come back with a concrete take on how custom software can solve it.
Reply within 24 hours — usually same day