AI-Powered Billing Software Dev for Software Company
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AI Development Custom Software Development
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Machine Learning
- $10,000 to $49,999
- Jan. 2026 - Ongoing
- Quality
- 5.0
- Schedule
- 5.0
- Cost
- 5.0
- Willing to Refer
- 5.0
"Their proactive approach to security, system architecture, and automation stands out."
- Business services
- Madrid, Spain
- 11-50 Employees
- Online Review
- Verified
App Design Agency has developed an AI-powered billing software for a software firm. They've designed the UI/UX, built the front- and backend, created a secure billing engine, and integrated automation features.
App Design Agency has delivered a fully functional MVP, enabling the client to onboard 120 beta users, reduce manual billing tasks by 60%-70%, decrease validation errors by around 40%, and boost operational efficiency by around 50%. Over 65% of early users has lauded the simplified billing workflow.
BACKGROUND
Introduce your business and what you do there.
I’m the CEO of Verifactu Software, a company that develops AI-powered billing software.
OPPORTUNITY / CHALLENGE
What challenge were you trying to address with App Design Agency?
We needed help designing and developing a secure, scalable AI-powered billing platform aligned with our requirements. The main objectives were to build a compliant invoicing system, implement intelligent automation for billing processes, ensure high data security standards, and create an intuitive UX for businesses managing electronic invoicing. Additionally, we wanted a solid technical architecture that would allow future integrations and growth without major restructuring.
SOLUTION
What was the scope of their involvement?
App Design Agency has handled the full-cycle development of our AI-powered billing software. The scope of work includes product strategy support, UX/UI design, backend architecture, frontend development, and compliance alignment with our requirements.Key deliverables include the design of the complete UI, development of a secure billing engine, implementation of AI-driven automation features for invoice processing, integration with tax-compliant electronic invoicing standards, and the creation of an admin panel for system management and reporting.App Design Agency has also worked on API integrations to allow future scalability, implemented security best practices for data protection, and supported testing and deployment preparation to ensure the platform is stable and ready for production.
What is the team composition?
We’ve worked with four members of App Design Agency’s team, including a project manager, a designer, and two developers.
How did you come to work with App Design Agency?
We found App Design Agency through an online search. We chose them over other options because they had high ratings, were close to our geographic location, had pricing that fit our budget, offered good value for the cost, and had company values that aligned with ours.
How much have you invested with them?
We’ve spent around $100,000.
What is the status of this engagement?
We started working together in January 2026, and the engagement is ongoing.
RESULTS & FEEDBACK
What evidence can you share that demonstrates the impact of the engagement?
App Design Agency has delivered several measurable outcomes that demonstrate clear progress. First, we’ve successfully launched a fully functional MVP within the planned timeline, allowing us to begin onboarding early users. The platform has achieved stable performance during initial testing, with successful invoice generation and validation aligned with our requirements.We’ve also reduced manual billing tasks by automating invoice creation and validation workflows, which has improved operational efficiency. Early user feedback has highlighted the platform’s ease of use and clarity of the interface. Additionally, the system architecture has been built to support future integrations, positioning us for scalable growth without needing major redevelopment.After implementing the automated invoice generation and validation workflows, we’ve reduced manual billing-related tasks by approximately 60%–70% compared to our previous semiannual process. Invoice creation time has decreased from an average of 8–10 minutes per invoice to under 2–3 minutes, primarily due to AI-assisted data extraction and automated compliance checks. Validation errors have been reduced by around 40%, which has significantly lowered the time spent on corrections and re-submissions.Overall, these improvements have translated into an estimated 50% increase in operational efficiency during the initial rollout phase, allowing our team to focus more on client onboarding and platform optimization rather than administrative billing tasks.During the MVP phase, we closely monitored early adoption and user feedback. Within the first two months after launch, we onboarded over 120 beta users, with approximately 75% actively using the platform on a weekly basis.In terms of satisfaction, we collected feedback through in-app surveys and direct user interviews. The average satisfaction score was 4.4 out of 5, with users highlighting ease of use and time savings as the main strengths. Additionally, over 65% of early users reported that the platform significantly simplified their billing workflow compared to their previous solution. These early indicators gave us confidence in product-market fit and validated the technical and UX decisions made during development.
How did App Design Agency perform from a project management standpoint?
App Design Agency has demonstrated structured and professional project management throughout the engagement. They work with clearly defined milestones, provide regular progress updates, and have transparent communication regarding timelines and deliverables.Overall, they’ve delivered the core MVP within the agreed timeframe. When minor adjustments or scope refinements arise — as is common in complex software projects — they communicate proactively and align expectations before proceeding. This has helped us avoid major delays and keep the project on track.Their organized workflow and responsiveness have given us confidence that the project is being managed responsibly and with attention to both deadlines and quality.We primarily communicate via virtual meetings, emails, and messaging apps.
What did you find most impressive about them?
What we’ve been most impressed with is App Design Agency’s ability to combine technical expertise with a clear understanding of business and regulatory requirements. Developing a billing platform aligned with our standards requires more than just coding — it demands precision, compliance awareness, and long-term architectural thinking.App Design Agency doesn’t simply execute tasks; they challenge assumptions, suggest optimizations, and propose scalable solutions from the beginning. Their proactive approach to security, system architecture, and automation stands out compared to other agencies we’ve evaluated.Additionally, their ability to translate complex technical concepts into clear business language has made collaboration smooth and efficient. It feels like working with a strategic technology partner rather than just a development vendor.
Are there any areas they could improve?
Overall, the collaboration has been very positive. If there’s one area they could improve, it would be providing even more detailed documentation earlier in the process, particularly around certain technical decisions and system architecture. While everything has been explained clearly during meetings, having more structured written documentation from the start would have helped our internal stakeholders review things more independently.That said, whenever we request clarification or additional documentation, App Design Agency’s team responds quickly and addresses it properly. It’s more about fine-tuning the process rather than correcting any major issues.
RATINGS
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Quality
5.0Service & Deliverables
"The platform is stable, well-structured, and user-friendly. Deliverables met expectations and were aligned with regulatory requirements."
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Schedule
5.0On time / deadlines
"The MVP was delivered on time. Any adjustments were communicated clearly and handled without major delays."
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Cost
5.0Value / within estimates
"Pricing was fair for the complexity involved. The scalability and architecture added strong long-term value."
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Willing to Refer
5.0NPS
"Yes, we would recommend them for complex custom software projects.