Custom .NET application development for your business
Fixed-scope project with agreed timeline and price. For SMBs replacing spreadsheets or legacy systems.
SMBs and self-employed professionals with processes scattered across disconnected Excel files, off-the-shelf tools that do not fit how they actually work, or legacy software that has reached its limit. If your team loses hours every week on manual tasks a system should handle, this service is for you.
- Upfront process analysis and technical discovery (2-hour session)
- Functional design and documented technical architecture
- Iterative delivery with bi-weekly demos and repo access from day one
- Deployment on your infrastructure or on Azure (included)
- User manual for your team + remote training session
- Complete technical documentation for future maintainers
- 30 days of post-delivery support at no cost for bug fixes
- 100% of the source code yours from delivery (no vendor lock-in to me)
- Recurring hosting or third-party licenses (I recommend, you purchase)
- Evolutionary maintenance beyond the 30-day window (contracted separately)
- Scope changes not foreseen in the proposal (quoted as an extension)
- Massive data migration from legacy systems (assessed separately if needed)
- Advanced graphic design or branding (I use your identity or clean templates)
Discovery
1 weekI understand your process, talk to whoever uses the current system, identify what works and what does not.
Fixed proposal
48 hoursScope, timeline and price in writing. Zero ambiguity. If you say yes, we start. If not, no cost.
Iterative development
2-10 weeksBi-weekly sprints with demo at the end. Repo accessible from day one. Minor changes included.
UAT and training
3-5 daysTesting with your team in an acceptance environment. Recorded remote training session.
Delivery and support
30 daysProduction deployment, documentation delivered and 30 days of support for bug fixing.
We worked with Rubén on the evolution and maintenance of critical applications in the automotive sector. He has an uncommon ability to step into complex legacy code without breaking what already works. He has shipped on active codebases for several premium brands with the same rigor and without a single last-minute escalation. He's the kind of profile you bring in when you cannot afford to fail.
Payment by milestones agreed at the start of the project, no upfront deposit. We define together when each milestone is invoiced (typically at the end of demos or functional block deliveries). Invoice with the applicable taxes. Payment within 10 days max by bank transfer or card (+1%).
30 days from final delivery to report and fix any bug found under normal use, at no extra cost. Does not cover scope changes, new features, or failures caused by third-party modifications to the delivered code.
Ready to start?
Book 30 free minutes in my calendar. Tell me your case and I will honestly say if I can help — or recommend someone who can.
See all services