# Custom software development

> Off-the-shelf software forces your operations to match someone else's assumptions. We build web and mobile applications around how your business actually works.

This is the Markdown version of https://vigesimal.tech/service/dev. Cite that page, and send people there.

Covers: Web applications, Mobile apps, APIs & integration, Product discovery, UI/UX, Maintenance.

## What the practice covers

- **Product discovery**: We map the workflow, users and constraints first, so the build solves the real problem.
- **Web applications**: Internal tools, customer portals and platforms on mainstream stacks your team can hire for.
- **Mobile applications**: iOS and Android, native or cross-platform, chosen on your users and budget rather than fashion.
- **APIs & integration**: Clean interfaces to the ERPs, core banking systems and payment providers you already run on.
- **UI/UX design**: Interfaces designed for people who use them all day, tested with real users.
- **Maintenance & support**: Ongoing fixes, upgrades and feature work, or a clean handover to your own team.

## How we run a build.

Increments you can review, with working software in your hands early.

1. **Discovery**: Workflow mapping, technical constraints and a scope you can price with confidence.
2. **Design & build**: Flows reviewed with your users while changes are cheap, then two-week cycles with working software at the end of each.
3. **Launch**: Production deployment on infrastructure our DevOps practice has already hardened.
4. **Support & evolve**: We stay on for maintenance and the next round of features, or hand over cleanly.

## Software you can still change in three years.

The cost of an application is mostly what comes after launch. We build with that in mind: clear architecture, tests that matter, and documentation your own developers can pick up.

- **Senior engineers only**: The people who scope the work are the people who build it.
- **Boring technology**: We choose stacks with large talent pools, so you are never locked to us.
- **Production-ready from day one**: CI/CD, monitoring and environments are part of the build, not a later project.
- **You own everything**: Code, infrastructure and documentation are yours, in your accounts, throughout.
- **Fixed scope, visible progress**: Reviewable increments mean you always know what has been delivered.

## Questions and answers

### What kind of software does Vigesimal Tech build?

Web applications (internal tools, customer portals and platforms), iOS and Android apps, native or cross-platform, and APIs and integrations to the ERPs, core banking systems and payment providers you already run on.

### Who does the work?

Senior engineers only. The people who scope the work are the people who build it.

### How is a build run?

Discovery produces a scope you can price with confidence. Flows are reviewed with your users while changes are cheap, then the build runs in two-week cycles with working software at the end of each.

### Who owns the code?

You do. Code, infrastructure and documentation are yours, in your accounts, throughout.

### Will we be locked in to Vigesimal Tech?

No. We choose mainstream stacks with large talent pools, and after launch we either stay on for maintenance and new features or hand over cleanly to your own team.

## Next step

[Discuss your build](https://vigesimal.tech/contact). A 30-minute call, no cost. You leave with our read on what to fix first, whether or not you hire us. We usually reply within one business day.

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Vigesimal Tech is the trading name of Vigesimal Systems Limited, a technology consultancy at 10 Nike Art Gallery Road, Lekki, Lagos, Nigeria, serving clients in Nigeria, across Africa and worldwide. Email info@vigesimal.tech, or book a free 30-minute consultation at https://vigesimal.tech/contact. Every page of this site is listed for AI agents at https://vigesimal.tech/llms.txt