Custom software development

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Custom software development

Your business has its own way of working. Your software should too.

We build custom business software: management systems, web and mobile apps, portals and integrations. When your tools fall short, we create a solution that connects your operations and supports your growth.

Let’s discuss your challenge ↗
Our approach / Spec-Driven Development

Software engineering, enhanced by AI.

We develop custom software using traditional methods and AI tools, according to your project’s needs. We use Spec-Driven Development to define what the solution must do and guide development, testing and validation. Our team leads the architecture and takes responsibility for the quality of each delivery.

  • Clear specifications. Goals, business rules and acceptance criteria that connect what you need with what we build.
  • AI as a development tool. Support for generating code, preparing tests and documentation, with professional review.
  • Software with or without built-in AI. We can build traditional systems or solutions with intelligent features. Using AI during development does not mean your application needs AI to run.
What we do for your business

Custom software to operate, integrate and grow.

01 / SERVICE

Applications for your operations

Management systems, portals and internal tools designed around your processes, users and priorities.

02 / SERVICE

Digital products

Web and mobile apps that bring your services to customers, teams or suppliers, from an initial release through new stages of growth.

03 / SERVICE

Integration and evolution

We connect tools, add capabilities and modernize existing systems to build on what already works.

A proposal tailored to you

What your team receives

We define the features for each stage and how you will validate them. Our proposal covers the agreed development work, testing, documentation and support for launch. We establish access, code handover and maintenance terms so you can plan your solution’s evolution.

We start by discussing your users, the process you want to improve and the systems you already use. From there, we propose an initial release, priorities and a scope you can evaluate.

Choosing your next step

What kind of software does your business need?

Not every project needs to start from scratch. We assess what to build, integrate or modernize based on your users, available systems and investment priorities.

  • Organize your operations. An internal system can bring together orders, appointments, tasks or requests currently scattered across spreadsheets and messages. We define user permissions, statuses and reports so everyone has the information they need.
  • Create a digital product or SaaS. If you want to offer a service online, we can develop an initial version with essential features, user access and integrations. For a subscription product, we agree on how to manage plans, accounts and billing around your business model.
  • Connect and modernize systems. We integrate commercial, administrative and operational tools to reduce duplicate data entry. For existing software, we assess what to retain and what to renew in stages to support business continuity.
Before we start

Questions worth discussing.

Do I need to have everything defined?

No. We can help clarify your needs, identify users and decide what to address first.

Can you work on an existing system?

Yes. We review how it works, its documentation, code access and integration options. Based on that, we recommend extending it, connecting a new application or modernizing it in stages. We also define how to validate data when a migration is needed.

Custom software or an existing tool?

We first review what you need to solve. If an available tool meets your needs, we can integrate or adapt it. Custom development makes sense when your processes, integrations or product require a solution of your own.

Do you also develop software without AI?

Yes. We create traditional software and AI solutions. The choice depends on the need: a management application can run on clear rules and add AI for tasks such as interpreting documents or assisting users.

What’s the difference between development and end-to-end delivery?

Development focuses on building and evolving software. With our end-to-end delivery service we can also coordinate discovery, architecture, QA, deployment and ongoing improvement, with a team accountable for the whole process.

How are budget and timelines defined?

The budget depends on features, user roles, integrations, data migration and testing requirements. We first define an initial release and its deliverables. Our proposal sets out stages, dependencies and change conditions so you can compare scope and investment before moving forward.

Who receives the code, access and documentation?

Our proposal establishes the terms for handing over source code, documentation and access. We also identify any external services and licenses the solution requires. You’ll know what your company receives and which operating costs to plan for.

What maintenance might the software need?

We can support incident resolution, updates and new features. Before launch, we agree on coverage, support channels and responsibility for hosting and backups. Maintenance depends on the solution and the contracted service level.

See how we work, step by step ↗

Let’s talk about the software your business needs.

Tell us where you are today and what you want to improve. We can help define a first stage that makes sense for your company or venture.

Let’s talk with Sizno ↗

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