ERPs and Taxes
Totvs/Protheus, Bling, Omie, NFe/SEFAZ and automated reconciliations.
Examples: Totvs Protheus · Bling · Omie · SEFAZ/NFe
ERP, CRM and API integration for your business
Does your team enter the same data in your ERP, CRM and spreadsheets? We build custom integrations to reduce this duplicate work, with operation logs and error handling.
ERPManagement and inventory
CRMCustomers and sales
GatewayPagamentos
appDigital experience
BIData and decisions
NotificationsMessages and alerts
API HubRules and routes
- Menos retrabalho
- Connected systems to reduce duplicate data entry
- Continuidade
- Automatic retries for temporary failures
- Falhas visíveis
- Pending items set aside for review and correction
- Mais controle
- History to track what has been processed
Which systems does your business need to connect?
Tell us which tools you use, where work gets duplicated and what needs to work together.
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.
Integrations we do
We connect your critical systems and create reliable flows with end-to-end observability.
CRMs and Sales
Sync leads, deals and activities in real time across platforms.
Examples: HubSpot · Pipedrive · Salesforce · RD Station
Payments
Pix, card, gateways and financial reconciliation with reliable webhooks.
Examples: Stripe · Pagar.me · Mercado Pago · Asaas
Messaging
WhatsApp Business API, transactional email, SMS and push notifications.
Examples: WhatsApp/Meta · SendGrid · Twilio · Firebase
E-commerce
Catalogs, orders, inventory and fulfillment on marketplaces and platforms.
Examples: VTEX · Shopify · WooCommerce · Free Market
Data & BI
ETL, real-time pipelines and exports to analytical platforms.
Examples: BigQuery · Snowflake · Metabase · Looker
What to define before commissioning an API integration
Choose a complete workflow for the first delivery: for example, turning an approved sale in the CRM into an ERP order. Define which system is the source of each piece of data, who can authorize the operation and how the team should respond to failures. This makes it possible to assess the budget and test the outcome.
- Specify vendors, versions, API documentation and test environment availability.
- List fields, frequency, volume and any need to import historical data or synchronize in both directions.
- Agree on tests for duplicate records, downtime, incomplete data and reprocessing.
- Separate implementation, licenses, infrastructure and maintenance when the vendor changes its API.
How we deliver
Discovery
Complete mapping: systems, journeys, latencies, volumes and expected SLAs.
We document each point of contact and design the ideal flow.
Contracts
OpenAPI specification, authentication schemes and versioning strategy.
Versioned contracts guarantee compatibility between teams.
Implementation
Typed connectors, queues (SQS/RabbitMQ), retries with backoff and idempotence.
Automated CI/CD with contract and integration testing.
Observability
Structured logs, business metrics, intelligent alarms and DLQ.
Real-time dashboards for operations and business.
From business need to a published project
LGV Engenharia
Institutional and operational portal for engineering services, with technical content, quote request and customer area in an integrated digital journey.
Quantum9's role: Digital product, UX and engineering.
- Corporate website with technical content.
- Quote request journey.
- Client area integrated into the portal.
Explore the published scope to assess its relevance to your situation. Timelines, investment and results depend on each operation.
Explore the project
Why Quantum9
Reliability
Resilient flows with idempotence, retries and failure queues when the scenario requires it.
SLAscoped
Performance
Latency and throughput are measures to guide batching, parallelism and limits of APIs.
p95measured in operation
Security
Protected secrets, minimal access required, and encryption in transit as per architecture.
Acessoleast privilege
Living documentation
Documentation proportional to the risk, with examples and history of relevant changes.
OpenAPIversioned contract
Stack we use
- Protocols & Standards
- REST
- GraphQL
- gRPC
- WebSocket
- OpenAPI
- OAuth2/OIDC
- Messaging & Queues
- RabbitMQ
- AWS SQS
- Redis Streams
- Kafka
- BullMQ
- Infraestrutura
- Node.js
- Next.js
- PostgreSQL
- Redis
- Docker
- Terraform
- Observabilidade
- Datadog
- Grafana
- Sentry
- OpenTelemetry
- PagerDuty
Yes. We implement specific integrations for legacy systems and also reuse ready-made connectors when possible — always with contract testing and documentation.
We define the strategy according to the risk: retries, idempotence, failure queues and alerts make errors visible and recoverable.
A simple flow can fit in a few weeks. The deadline depends on documentation, authentication, volume, business rules and approval environment.
Yes. We deliver observability dashboards with flow metrics, latency, errors and configurable alerts per channel (Slack, email, PagerDuty).
Yes. We map current flows and plan transition, parallel operation and rollback according to the risk and limitations of the systems involved.
The investment depends on systems, documentation, workflows, data volume, authentication and failure-handling rules. To receive a comparable proposal, specify the tools, the first workflow to automate and access conditions for a test environment. Licenses and vendor costs should be evaluated separately.
An off-the-shelf connector may work when it covers the required fields, rules, volume and support. A custom integration makes sense when you need rules or controls it does not provide. The assessment considers total cost, maintenance and vendor dependencies.
Integrations that unlock your growth
Tell us which systems need to communicate, where work is duplicated and what matters most. In the initial conversation, we assess the situation and next steps. The technical plan and estimate depend on access, business rules and scope assessment.
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