Custom internal systems
Turn business rules, approvals and recurring tasks into a system connected to your team's daily work.
Custom Software Development
Hire a team to build business software, portals and APIs tailored to your operations. We bring processes scattered across spreadsheets together and modernize existing systems, with a defined scope and delivery stages.
- Mapped business rules
- Modernization in stages
- Documented integrations
Tell us what your software needs to solve
Describe the process you need to improve, the system you want to build or what needs modernizing.
A clear first step
We reply by email to understand your priority and arrange the next conversation. You do not need a finished brief.
- Understand the situation. The process, systems involved and impact of the problem.
- Define the scope. Access, dependencies and what needs validation.
- Agree on the next step. Technical assessment, discovery or a proposal, depending on scope.
Timing and investment are defined after assessing the context and each team’s responsibilities.
What we built
Software for businesses that need to connect processes, modernize operations and serve customers with greater control.
Systems modernization
Modernize existing applications in stages, assessing dependencies, data migration and acceptance criteria.
APIs and Integrations
Integrations with reliable ERPs, CRMs, payment gateways, messaging and webhooks.
B2B business portals
Organize requests, documents and support for customers or partners, with role-based access.
How to hire a software development company
Start with the process that needs to work: who uses it, which decisions the system makes and which tools it exchanges data with. Quantum9 turns that context into scope to assess investment, stages and acceptance criteria. A clearly defined first version lets you validate usage before expanding the product.
Investment and timeline
The number of journeys, access roles, integrations and data migration affect the budget. Separate development, infrastructure, third-party services and maintenance when comparing proposals.
Code and continuity
Define code ownership, repository access, documentation and transition terms in the contract. Component licenses and external services must also be identified.
Acceptance and maintenance
Describe real scenarios to validate each delivery and agree on who handles acceptance testing. Distinguish bug fixes, operational support and new features.
How we deliver
Discovery
Understanding objectives, constraints and expected success.
Architecture
Pragmatic technical design for speed + scalable foundation.
Construction
Weekly sprints, demos and product metrics.
Launch
Secure go-live, observability and growth plan.
From business need to a published project
Loja Maçônica Alvorecer do Campeche
Alvorecer 33 pilot store, with integrated management of Secretariat, Treasury, Chancery, events, Library and communication in an environment with its own identity and domain.
Quantum9's role: Product engineering and deployment.
- Integrated administration, treasury and chancellery management.
- Events, library and communication.
- Pilot lodge deployment with its own visual identity and domain.
Explore the published scope to assess its relevance to your situation. Timelines, investment and results depend on each operation.
Explore the project
Why Quantum9
Verifiable scope
Requirements, deliverables and acceptance criteria aligned with your business process.
Team suitable for the scope
Roles and capabilities defined according to complexity, risk and product phase.
Full transparency
Roadmap, hours and costs visible from day 1.
Security and LGPD
Good data practices, consent and minimization.
Technologies we use
- Next.js
- React
- TypeScript
- Node.js
- PostgreSQL
- Prisma
- Vercel
- Tailwind
In the initial conversation, we learn about your process, systems and priorities. Estimates depend on scope, access and integration assessment; complex projects may require a separately contracted discovery phase.
Yes, we carry out takeovers with technical diagnosis and stabilization plan.
We work according to a closed scope or sprint (time & material) with predictability.
We serve companies of any size, focusing on B2B services, retail/ecommerce, education, health, industry and logistics.
When essential rules, integrations or permissions are not supported by available tools. If an off-the-shelf system handles the process at a lower total cost, it should be part of the comparison. The assessment helps define what actually needs to be developed.
Compare scope, verifiable deliverables, testing, documentation and responsibilities after release. Ask the proposal to specify repository access, code ownership, third-party licenses, infrastructure and maintenance terms; these points must be in the contract.
Ready to move forward?
Tell us about the process you need to improve, the systems involved and your business priority. In the initial conversation, we assess the situation and agree on the next step to define scope, timeline and investment.
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