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Custom Software Development

We design, build, and support custom software for established businesses that have outgrown spreadsheets, manual coordination, and off-the-shelf tools.

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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.

Ticked items link to a screen from a system we built with them.

Backend

Frontend

Mobile and desktop

Cloud and delivery

Data and reporting

Business systems we integrate

Payments and messaging

AI and automation

From the case studies

One screen from each system, recreated with sample data and stand-in branding.

  • Retail / Competitive Intelligence

    Retail Price Monitoring & Competitive Intelligence Platform

    Competitor listings are linked to the right SKU, and your team approves or corrects each match.

    • .NET
    • Akka.NET
    • Kubernetes
    • Docker
    Read the case study

  • E-commerce

    Retail Sourcing & Reseller Marketplace Platform

    Warehouse staff scan each package and it's matched to the deal it was sold from.

    Read the case study

  • FinTech / Non-profit

    Donor-Advised Fund & Charitable Giving Platform

    Recurring grants run on their own, and a donor can pause a month.

    • Plaid
    • Card and check issuance
    Read the case study

  • Logistics / Port Operations

    Transport Management System for Port Logistics & Cartage

    The scheduler shows which drivers are actually free and allocates the job against them.

    • Xero
    • OCR document capture
    • EDI and XML feeds
    • iOS
    • Android
    Read the case study

  • Healthcare / Veterinary

    Cloud Veterinary Practice Management Platform

    The estimate the owner approved becomes the invoice, with declined items left off.

    • Twilio
    • Speech-to-text
    • Large language models
    Read the case study

  • Real Estate / Property Management

    Property & Building Management Platform

    Work orders carry their purchase order, so a repair's cost lives with the repair.

    • Angular
    • Large language models
    Read the case study
All case studies

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. 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. 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. 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. 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. 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 services

  • Product DesignInterface design for systems people use all day, where clarity matters more than decoration.
  • Cloud DevelopmentCloud infrastructure that scales with the business and costs less to run than the servers it replaces.
  • AI/ML SolutionsAI grounded in your data and workflows: automation, prediction, and governed access to the models your team already uses.

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