The Software Your Business Needs Doesn't Exist?
We Build It.
Stop adapting your business to generic tools that don't fit your processes.
We develop custom software — client portals, internal tools, APIs and integrations — that works exactly the way your business needs. No compromises. No artificial limitations.
If Any of These Situations Sound Familiar...
Your business is losing time and money every day with solutions that were not built for you.
❌ Excel and Spreadsheets for Critical Processes
The management of orders, quotes or inventory still lives in a shared Excel sheet where nobody knows which version is correct. Manual errors, duplicate data and zero automation — every day that passes, the problem grows and the team spends more time fixing errors than producing results.
❌ Paying for SaaS Features You Don't Use
You subscribe to 5, 10 or more SaaS platforms. You use 20% of the features in each one. You pay 100% of the price for all of them. By the end of the year, you have spent thousands of euros on licences for tools that don't fit your real workflow. And when you need a specific feature, the answer is always "it's on our roadmap" — with no concrete date.
❌ Systems That Don't Talk to Each Other
The CRM doesn't talk to the ERP. The ERP doesn't export to invoicing. Invoicing doesn't update inventory. Your team spends hours manually copying data from one platform to another — and when they make a mistake, nobody notices until it is too late. Data is scattered across 7 different systems and none shows the complete truth.
❌ Vendor Lock-In and Total Dependency
You are held hostage by a platform that controls your data, sets the prices and changes the rules whenever it wants. If you want to leave, you discover that your data is not portable and that years of work are trapped in a system that doesn't belong to you. With every renewal, the price goes up. With every update, something stops working as before.
"The custom-built system replaced 4 SaaS tools. We save €2,400/month and gained full control."
View full case study →What We Build for You
Software designed around your business — not the other way around. Each system is designed to solve a concrete problem and scale with you as you grow.
Client Portals (Self-Service)
Your clients access invoices, track orders, raise support requests and review history — all in a private area branded with your identity. Your team stops answering repetitive emails and the client gains 24/7 autonomy.
- Client area with secure login and profile management
- Invoice, payment and statement consultation
- Real-time order tracking
- Integrated support ticket system
- Document and certificate downloads
Internal Tools (Operational Dashboards)
Control panels that centralise KPIs, pipelines, team management and reporting on a single screen. No more opening 6 different tabs to know the state of the business. Faster decisions with real-time data.
- Executive dashboards with custom KPIs
- Commercial and operational pipeline management
- Automated reports with PDF/Excel export
- Email and push alerts and notifications
- Role and department-based access control
APIs & Integrations (Connect Everything)
We connect your existing systems — ERP, CRM, invoicing, logistics, payment gateway — via robust APIs. Data flows automatically between platforms, eliminating manual entry and human errors.
- Documented REST and GraphQL APIs
- ERP integration (SAP, PHC, Primavera, Sage)
- Connectors for payment gateways (Stripe, MBWAY)
- Bidirectional real-time data synchronisation
- Webhooks and message queues for high availability
Process Automation (Workflow Engines)
Workflow engines that automate approvals, notifications, escalations and repetitive processes. From the entry of an order to final delivery — every step is automated, traceable and auditable.
- Configurable multi-level approval workflows
- Automated notifications via email, SMS and Slack
- Automatic SLA and priority-based escalation
- Complete audit trail of every action and decision
- Custom business rules without code
Team Apps (Field Service)
Mobile apps for field teams: technicians, sales reps, drivers. Visit logging, digital checklists, signature capture, geo-located photos and offline synchronisation. Information reaches the office in real time.
- Offline operation with automatic sync
- Configurable digital checklists and forms
- Photo capture with geolocation and timestamp
- On-screen digital signature capture
- Integrated GPS tracking and route optimisation
Legacy System Modernisation
That critical app built in Access, VB6 or a monster Excel that nobody wants to touch but the business depends on? We rewrite it for the modern web while keeping the logic that works, with data migration that does not disrupt operations. You keep the accumulated knowledge while gaining scale, security and mobile access.
- VB6 / Access / .NET Framework migrated to modern web
- Data migration with no loss of history
- Old and new systems running side by side during transition
- Phased rewrite — module by module, no big bang
- Complete technical documentation of the new system
Why Custom Software Instead of Yet Another SaaS?
A generic solution solves 70% of the problem. The other 30% is exactly what differentiates your business from the competition.
🎯 Fits Your Process, Not the Other Way Around
The software adapts to the way your team works. You don't need to change processes that work to fit the limitations of a generic platform.
💶 Predictable Cost, No Monthly Licences
An upfront investment with a clear ROI. No per-user licences that scale uncontrollably. The code is yours and the monthly operating cost is a fraction of the equivalent SaaS.
🔒 Full Security and Control
Your data stays on your infrastructure. No third parties accessing your client information. GDPR-compliant from the ground up and implements the security policies your sector requires.
📈 Scales With Your Growth
We start with an MVP and add modules as the business grows. No artificial "Enterprise" plans. No features locked behind upgrades. The system evolves at your pace.
From Problem to Software in 6 Steps
A structured process that eliminates surprises and ensures every euro invested generates real value for your operation.
Discovery
A diagnostic meeting where we map your current processes, identify inefficiencies and define the functional requirements of the system. We interview the people who will use the software daily to ensure we solve real problems, not imagined ones. We leave with a clear specification document, investment estimate and timeline — all approved by you before we move forward.
Design (UX/UI & Architecture)
We design the user interface with a focus on usability and operational efficiency. We define the technical architecture, the data model and the necessary integrations. You receive interactive Figma prototypes to validate every screen and every flow before we write a line of code. No surprises, no rework, no additional costs for last-minute changes.
MVP (Minimum Viable Product — 4 Weeks)
Within 4 weeks, we deliver the first functional version of the system with the core features that solve the main problem. You can start using it, testing with your team and giving real feedback based on actual use — not theories or mock-ups. This MVP is already a functional system in production, not a demonstration.
Iteration (Improvement Cycles)
Based on feedback from your team and end users, we refine features, add secondary modules and optimise workflows. Each 2-week sprint delivers measurable incremental value. Your team takes part in the end-of-sprint demos and validates each delivery before we move on to the next. Total transparency.
Deploy & Launch
We put the system into production, migrate historical data and configure the final infrastructure with monitoring and automatic backups. We deliver intensive training to the team who will use the software day-to-day, with hands-on sessions and documentation. We accompany the first 30 days of real use to ensure everything runs without incidents.
Continuous Support & Evolution
After launch, we activate ongoing support with a guaranteed SLA: 24/7 proactive monitoring, security updates and fast bug fixes. More importantly — we keep developing: new features, additional integrations and optimisations as your business evolves. We do not disappear after delivery — we are long-term partners.
Complementary Solutions
Custom development is more powerful when integrated into your complete digital ecosystem.
We tie website, CRM, ERP, invoicing and marketing into a single cohesive, scalable, future-proof system.
We integrate your ERP with every system to eliminate silos and make information flow without manual intervention.
Native and hybrid apps for iOS and Android that extend your custom software into the field.
We automate the workflows that run on top of your custom software — approvals, follow-ups, notifications.
💰 Custom Software Savings Calculator
See how much your business can save annually by replacing manual processes and unnecessary SaaS licences with a custom-built system.
Estimated annual savings
€0
Based on €20/hour cost and an average €200/month per SaaS subscription
What Our Clients Say
Concrete results from Portuguese businesses that replaced generic solutions with custom software.
"We had 4 Excel sheets to manage routes, drivers and deliveries. Pro Digital Key built a system that automated everything — from route assignment to delivery confirmation with digital signature. We reduced shipping errors by 82% and save 14 hours a week of admin work."
"We needed a portal where our 23 franchisees could place orders, check stock and access marketing materials. No SaaS did what we wanted. The custom portal was ready in 10 weeks and we eliminated 6 subscriptions we were paying — annual savings exceeded €18,000."
"Our ERP gave no visibility on the shop floor. The team built a real-time production dashboard that integrates with the machines via IoT. Now I detect bottlenecks in minutes, not days. Line productivity rose 19% in the first quarter after implementation."
"We had a validated idea but zero technical capacity to build the MVP. Pro Digital Key delivered in 14 weeks a multi-tenant platform with billing, auth and analytics integrated. We launched with 3 paying customers in the first week and closed the pre-seed round 4 months later — the technical product was decisive."
Frequently Asked Questions
We choose the most suitable technology stack for each project. We work with React, Next.js, Vue.js and Angular on the frontend; Node.js, Python, .NET and PHP on the backend; PostgreSQL, MongoDB and MySQL for databases; and AWS, Azure or dedicated infrastructure for hosting. The choice is always based on project requirements, the scalability needed and the team that will maintain the system long-term. We document everything so that any competent developer can pick up where we left off.
Yes, 100%. All source code, technical documentation, databases and intellectual property are yours from day one. We deliver full access to the Git repository, infrastructure credentials and deployment documentation. We do not practise vendor lock-in — if you ever want to switch providers, you take everything with you without any contractual or technical restriction. The code is yours. Full stop.
Every project includes a post-delivery support period with a defined SLA. We guarantee bug fixes, security updates, uptime monitoring and automatic backups. Beyond that, we offer continuous evolution plans where we add new features, optimise performance and adapt the system as your business grows. We do not disappear after delivery — we are long-term technology partners and treat your system as if it were our own.
A functional MVP is typically ready in 4 to 8 weeks, depending on complexity. Full projects with multiple integrations, a client portal and a mobile application can take up to 12 weeks. We work in 2-week sprints with incremental deliveries — meaning you start seeing results in the first few weeks, not months later. Each delivery is tested, documented and validated by your team before we move on to the next phase.
Every day with manual processes is a day of lost profit.
The software your business needs doesn't exist on the shelf — but it can exist within weeks. Talk to us and transform the way your business operates. No commitment, no upfront diagnostic costs.