Services / Custom Software
Custom Software Development
We design, build, and support custom software for established businesses that have outgrown spreadsheets, manual coordination, and off-the-shelf tools.
Industries we've built systems for
Every system below is a shipped project, not a capability claim. The case studies carry the details.
- Logistics & port operations
- Real estate & property management
- Healthcare & veterinary
- FinTech & payments
- Non-profit & charitable giving
- Retail & e-commerce
Technology
What we build with, and what we build into
Every technology below is one we work in, and every integration is one we have delivered against in a client system.
Backend
- .NET
- ASP.NET MVC
- C#
- Python
- Node.js
- Express.js
- SignalR
- Akka.NET
- REST and GraphQL APIs
Frontend
- React
- Angular
- Vue.js
- TypeScript
- Next.js
- Tailwind CSS
- PostCSS
Mobile and desktop
- React Native
- Flutter
- Xamarin
- Ionic
- Electron
- iOS
- Android
Cloud and delivery
- AWS
- Microsoft Azure
- Docker
- Kubernetes
- Serverless
- CI/CD
Data and reporting
- SQL Server
- PostgreSQL
- Power BI
- ETL pipelines
- OCR document capture
Business systems we integrate
- NetSuite
- SAP Business One
- Microsoft Dynamics 365
- Epicor
- SYSPRO
- Deacom
- QuickBooks
- Xero
- SoftPro
- Brightree
- FedEx
- UPS
- Microsoft Exchange
Payments and messaging
- Plaid
- Twilio
- Amazon SES
- Card and check issuance
- EDI and XML feeds
AI and automation
- Large language models
- NLP extraction
- Speech-to-text
- Classical machine learning
- Workflow automation
Custom software development is our core business, and it is more specific than the phrase suggests. Over 20 years and 125 projects we have built transport management systems for port operators, practice management platforms for veterinary networks, property and building management systems for real estate firms, pricing intelligence platforms for retailers, donor and fund administration platforms for non-profits, and payment applications certified to industry standards. Different industries, one pattern: an established business whose operation had outgrown spreadsheets, manual coordination, or software built for somebody else.
We build new systems, and we build the bridges between the ones you already run, so data moves without retyping and routine work runs itself, with AI applied throughout our own delivery process to keep projects fast and predictable.
The measure we hold ourselves to is what the system costs you after launch. Clients tell us that number is zero. No maintenance retainer, no upkeep budget, years after their systems went live. That is what we mean by software made to last.
Why businesses commission custom software development
Built around your operation
Off-the-shelf software makes your team work its way. A custom system encodes how your business actually runs, including your workflows, your pricing rules, and your compliance obligations.
Built to last
We engineer for the decade, not the demo. Architecture and testing discipline keep systems running long after launch.
Scales with growth
Systems designed for your volume at launch and your volume five years out, with no per-seat licensing that punishes growth and no rewrite when you expand.
Connects what you already use
We build bridges between your enterprise software, so information flows between systems automatically and routine tasks run themselves.
An asset you own
The system, the code, and the data are yours. No vendor lock-in, no subscription that outlives its usefulness, no feature roadmap you don't control.
How we build custom software
- 1
Discovery and Planning
Understanding the operation before proposing the system.
Initial Consultation
Understanding your business, goals, and challenges to define the right scope.
Requirement Analysis
Detailed gathering of functional and non-functional software requirements.
Project Roadmap
A timeline with milestones, measurable deliverables, and the full cost, all before you commit.
- 2
Design and Prototyping
You see the system before a line of code is written.
System Architecture
Architecture, data flows, and integration points designed for your scale and security requirements.
Interface Design
Screens designed around the daily work of the people who will use them.
Working Prototypes
Functional, clickable prototypes that confirm scope and flow before development begins.
- 3
Development
Senior engineers, transparent progress.
Agile Delivery
Short cycles with regular sprint reviews, so you see working software early and often.
Quality Assurance
Rigorous testing at every stage, the discipline behind systems that don't need a maintenance budget.
Regular Updates
Transparent reporting on progress, blockers, and build quality throughout.
- 4
Deployment
Moving your team onto the new system.
Launching the Software
Deployment into your environment with zero-downtime strategies.
Transition Support
Documentation and training that move your team onto the new system without disruption.
- 5
Support and Iteration
Support and extensions from the team that built it.
Ongoing Support
Monitoring and on-call support for as long as you want us involved.
Enhancements
When your business changes, the system changes with it, extended by the team that built it.
Why RothTech
Businesses weighing custom software usually compare us against building it in-house. That path means months of recruiting, then a permanent payroll for a finite build. We bring a full senior team on day one, at a price clients consistently describe as better than expected, and we hand over systems that keep running without us.
Frequently Asked Questions
It depends on scope, and we put a full number on it before you commit, never during. The main cost drivers are the number of systems we integrate with, the complexity of your workflows, mobile requirements, and compliance obligations. We scope first, quote fixed milestones, and hold to them. Most clients tell us the total came in below what they expected, especially measured against the running cost of hiring in-house.
For a finite build, in-house is usually the expensive path, with months of recruiting, salaries and benefits that continue after launch, and key-person risk if a developer leaves. We bring a full senior team on day one and hand you a documented system your business owns. Some clients do build internal teams later; the systems we deliver are documented for exactly that handover.
A permanent senior engineering team in Osijek, Croatia. The same people who design your system build it, and that team stays in place years later when you want it extended, so long-term support never depends on rehiring anyone.
The system is built to run without us. That is the standard we engineer to, and the reason long-time clients report no maintenance spend. When you want changes, the team that built the system extends it. There is no mandatory support contract and no dependency by design.
Scoped projects run from a few months for a focused system to longer for multi-facility platforms. You get the timeline with the quote, with milestones you can hold us to, and working software to review well before the end date.
Related Case Studies
Cloud Veterinary Practice Management Platform
A cloud practice management platform for veterinary clinics covering patient records, scheduling and online booking, prescriptions, multi-location inventory, and invoicing, with the imaging and distributor integrations clinics run on.
Property & Building Management Platform
A property management platform running more than 24,000 residential and commercial units, rebuilt from the legacy system it outgrew, with an AI tenant assistant handling the enquiries that used to fill a manager's day.
Transport Management System for Port Logistics & Cartage
A custom transport management system for port cartage and warehousing, deployed across four major sea ports: container tracking, vessel schedule integration, and automated billing on one platform.