Custom SaaS & business applications
Gateflow develops applications around your business processes. Choose a defined project or ongoing development and maintenance for a monthly fee.
Gateflow is based in Frankfurt and works on projects in the Frankfurt-Rhine-Main region and across Germany. Remote and on-site work are agreed for the project.
Request a video callSoftware developed for your workflows
You need an application that supports how your business works and can change as requirements develop. Gateflow builds the agreed functions and connects the application to your existing systems. Development can continue with maintenance and extensions under an agreed monthly arrangement.
Custom SaaS development for your business
Custom Software as a Service gives your team an application built around your own processes, with ongoing technical care. Gateflow develops customer portals, booking systems and internal tools around the work people need to complete. User roles, business rules and the data model follow your requirements. A focused application can fill a gap in your existing setup without replacing the software your team already uses.
Software development for a monthly fee
You can commission a defined application project or choose a monthly arrangement for development and maintenance. In the monthly model, Gateflow agrees the available development capacity and works through priorities with you as requirements change. The proposal sets out the fee, included work and support arrangements. Hosting, external services, usage rights and any initial setup are specified before work starts.
AI-assisted development with ChatGPT and Claude
Gateflow uses ChatGPT, Claude and other AI agents in development workflows to work through requirements, implement functions and prepare tests. Technical review and release decisions remain with Gateflow. Changes are checked against the agreed user tasks and acceptance criteria before delivery. The project also defines which code, documents and data may be used with AI tools.
UX/UI design, usability and clear user flows
The application should use your visual identity and make clear what users need to do next. Gateflow designs the main user journeys before expanding the interface, from the first sign-in to completing a booking, approval or case. Navigation and labels stay consistent when a page is loading, a search returns no results or an error occurs. Reviews use realistic tasks to find where people hesitate, lose context or need help.
Conversion optimization and product adoption
For a customer-facing application, the useful outcome may be a completed inquiry, registration or booking. Gateflow reviews the steps leading to that outcome and identifies unnecessary fields, unclear choices and failed submissions. For internal tools, the focus is successful task completion, fewer input errors and less manual follow-up. Gateflow agrees what to measure, then uses those observations to plan further changes.
Accessibility and web application performance
Keyboard use, readable contrast, form labels and clear focus states belong in the design from the start. Gateflow agrees accessibility criteria using WCAG 2.2 as a reference and checks the selected user journeys on relevant devices. Performance checks cover loading, response to input and visual stability, along with the application functions that handle larger data sets. Test conditions and acceptance targets are defined for the project.
Application security and reliable operation
Gateflow defines roles and access limits around the information each user may see or change. The technical scope covers validation, handling of credentials and checks for failed or unauthorized actions. Data handling, backup recovery and the release procedure are agreed with the customer. Security requirements can be specified against OWASP ASVS; monitoring and operating responsibilities are documented for the chosen service scope.
Ongoing maintenance, new features and system integration
After launch, Gateflow can continue maintaining your application and develop the changes you request within the agreed monthly scope. This can include bug fixes, dependency updates, new workflows and connections to your CRM, ERP or other existing systems. Integration work defines how records move, how failed transfers are handled and who checks exceptions. Regression tests help verify that new releases preserve the functions your team already uses.
What Gateflow delivers
- A buy, configure or build assessment for the specified function.
- An application for the agreed task, with user roles, a data model and integrations.
- Acceptance tests, deployment documentation and a maintenance handover.
- An agreed option for ongoing maintenance, requested features and system integrations.
Delivery and acceptance
Gateflow first defines the smallest useful function, such as a booking, approval or case view. Gateflow recommends an existing system when that system meets the requirement.
Where this fits
For small and midsize teams with a precise process gap and a person who can make product decisions.
What Gateflow needs to begin
Gateflow needs to understand the task users must complete and the current workaround, along with data sources and permission roles. You name someone who can decide what the first release must include. Existing products are assessed before custom development begins.
How Gateflow checks the result
Acceptance uses the user tasks named in the brief, including permission boundaries, incorrect inputs, system failures and the operational steps needed after launch. The checks also identify any undocumented manual steps needed to complete those tasks.
Your application and ongoing support
You will receive a working application with documentation for the code and deployment, a data model and instructions for administration. You can take over the application after the project or ask Gateflow to maintain the software, develop the features you request and connect existing systems through an agreed monthly arrangement.