Systems integration & API development

Make the software you already have work together.

Your business probably uses several systems for customers, sales, accounting, scheduling, inventory, documents, and operations, and they don't always share information. We connect the software you already use through APIs, custom integrations, and automation, so information moves between systems without your team entering it multiple times. From Salesforce and QuickBooks to Microsoft 365, Shopify, ERP platforms, and custom applications, we build connections around your workflows, with clear rules for how data is shared, updated, and protected.

The real problem

The information exists. It just doesn't move.

Your customer information lives in one system, invoices in another, appointments somewhere else, and reporting in spreadsheets. The information is already there, but employees still spend time copying it between applications and checking whether everything is up to date.

CRM
Customers and deals, updated by hand.
Accounting
Invoices and payments, re-entered.
Spreadsheets
The glue nobody fully trusts.
Industry software
The system of record, walled off.
Email & forms
Requests that never reach a system.
Reporting
Numbers assembled manually each month.
Develop & Conquer

We connect those systems so the right information reaches the right place, with less manual work and fewer opportunities for errors, and clear rules for which system owns what.

Business software integrations

Connect the tools your business already depends on.

We work with business applications, cloud platforms, databases, and custom systems to create reliable connections between the tools your team uses every day.

CRM & customer systems

Salesforce, HubSpot, Zoho, and custom CRMs. Contacts, accounts, opportunities, activities, and customer records.

Accounting & ERP

QuickBooks, Sage, NetSuite, and other systems. Approved invoices, customers, POs, payment status, and financial data.

E-commerce & POS

Shopify, WooCommerce, Square, and other platforms. Orders, products, inventory, customers, and fulfillment.

Scheduling & operations

Job management, dispatch, and scheduling apps. Appointments, work orders, assignments, and completion status.

Documents & e-signature

DocuSign, SharePoint, Microsoft 365, and Google Workspace. Contracts, approvals, signed documents, and file references.

Communication systems

Email, SMS, phone systems, and support tools. Messages, notifications, call information, and history.

Databases & reporting

SQL databases, Snowflake, reporting platforms, and custom data stores. Authorized sync, datasets, and analytics.

Custom & industry software

Proprietary applications, legacy systems, and specialized platforms. Custom APIs, data exchange, and middleware.

We work with what you already have.

These are examples of systems we can evaluate and integrate with, subject to API access, licensing, permissions, and vendor restrictions, not a claim to be a certified partner of every platform listed.

See an integration in action

A customer and approved invoice move from sales into accounting.

Illustrative workflow, not a live customer system. The same pattern covers CRM-to-accounting, e-commerce-to-inventory, DocuSign-to-CRM, and field-service connections.

Step 1 of 4
A customer and approved invoice are ready in the CRM.
What we connect

The source record is where the flow begins.

How integrations work

One integration layer, not a tangle of point-to-point hacks.

Instead of brittle one-off connections, we design a layer that validates data, respects permissions, and makes clear which system is the source of truth, so it stays trustworthy as it grows.

Your systems
CRMAccounting / ERPE-commerce / POSSchedulingDocumentsIndustry software
Secure integration layer
Approved APIs, data validation, ownership rules, error handling, retries, and logging
What you get
Automatic syncOne source of truthDashboards & reportingFewer manual steps

Conceptual architecture. What's possible depends on each platform's available APIs, permissions, and terms, which we confirm before promising a connection.

Custom API development

When the connection doesn't exist, we can build it.

Some software already provides the connections you need. Other systems require custom engineering. We design and develop APIs, middleware, and data services that let applications exchange information securely and reliably, for web apps, mobile apps, SaaS platforms, and partner integrations.

REST API development

Custom endpoints for applications and approved data access.

Webhooks & events

Trigger supported workflows when records or statuses change.

Data synchronization

One-way and two-way updates with defined ownership rules.

Middleware development

A controlled layer connecting systems with different formats and rules.

Legacy data connections

Modernize access to older applications and databases where feasible.

API security

Authentication, permissions, validation, and operational safeguards.

Choosing the right approach

The right connection for the job.

Some integrations can be handled with existing connectors or automation platforms. Others require custom APIs, complex data mapping, stronger monitoring, or tighter control. We evaluate the systems, data, and requirements before recommending an approach, we're not here to sell custom development when a simpler solution works.

Approach · often appropriate for
ApproachOften appropriate for
Native integrationsCommon connections already supported by the software vendors
Zapier, Make, or similarStraightforward workflows using supported connectors
Integration platformsMultiple applications needing centralized management and governance
Custom APIs & middlewareSpecialized logic, proprietary systems, or requirements existing tools don't meet
Hybrid approachStandard connectors alongside custom services where needed

The distinction isn't "simple tools vs. real engineering", platforms like Zapier and Make handle sophisticated workflows too. It's about requirements, governance, reliability, cost, and maintainability.

Monitoring & reliability

An integration that moves data is good. One that tells you when it can't is better.

Validation, logging, retries, and alerts matter because connections do occasionally fail, a vendor changes an API, a record won't match, a service is briefly down. We build integrations that surface the problem instead of silently dropping data.

Integration monitor · needs attention
ConnectionLast runRecordsStatus
CRM → Accounting2 min ago61 todayReview required
Shopify → InventoryJust now128 todayHealthy
DocuSign → CRM9 min ago14 todayHealthy
Scheduling → Accounting1 min ago45 todayHealthy
4Active connections
248Records processed today
1Unresolved error
99.9%Uptime this month

Illustrative data. The CRM-to-accounting flow flagged one invoice it couldn't match to a customer, held for review rather than guessed. We build alerts, duplicate prevention, automatic retries for transient failures, and clear recovery steps for the rest. Some issues resolve on their own; others need review or vendor support.

How we work

First we understand the systems. Then we connect them.

You can start with one high-value integration rather than rebuilding your whole technology environment, which is usually the right move for small and midsize businesses.

  1. 1

    Map your systems

    Identify the applications you use, where information lives, and which manual processes need improvement.

  2. 2

    Check access & requirements

    Review APIs, licensing, permissions, data formats, security needs, and vendor restrictions.

  3. 3

    Design the connection

    Define which system owns each record, how updates move, how conflicts are handled, and what happens when something fails.

  4. 4

    Build & test

    Develop the integration, test real scenarios, validate data, and review exceptions before deployment.

  5. 5

    Launch & maintain

    Deploy, monitor, document, and support the integration, or prepare it for handoff.

Experience that goes beyond connectors

We've worked with the systems businesses depend on.

Develop & Conquer brings more than 18 years of software engineering and enterprise systems experience, including application development, APIs, databases, cloud platforms, and business process integration.

We understand the challenges of connecting systems that weren't designed to work together, especially when data accuracy, permissions, security, and ongoing reliability matter. We approach integration from both an engineering and an operational perspective, so the solution works for the people who depend on it every day.

Many firms advertise "integrations" or "AI automation"; fewer can show real experience working with enterprise systems and building custom software around them. We attribute examples honestly, founder and prior-venture work is noted as such, not presented as D&C client projects, and we're glad to walk through relevant work on a call.

The kinds of systems we've connected

Integration experience across the real stack.

Area · what it involved
AreaWhat it involved
Salesforce & enterprise appsComplex records, workflows, APIs, and enterprise integration requirements
DocuSign & document workflowsSigned documents, approvals, customer records, and supporting systems
Data platforms & reportingSQL databases, Snowflake, reporting, and cross-system information flows
Custom application developmentAPIs connecting mobile apps, web platforms, payments, and backend systems
Connected hardwareDevice data flowing into software platforms and operational dashboards
Sacramento systems integration

Business systems integration in Sacramento and beyond.

Develop & Conquer helps businesses throughout Sacramento and Northern California connect the software and data they depend on, integrations between CRM platforms, accounting systems, ERP software, e-commerce applications, scheduling tools, databases, and custom business applications.

Whether you're connecting Salesforce to another business system, synchronizing online orders with inventory, developing a custom API, or replacing manual data entry between applications, we design and build reliable connections around your existing operations.

Based in Sacramento, we serve businesses in Roseville, Folsom, Elk Grove, Rancho Cordova, Davis, and surrounding communities, as well as remote clients.

Common questions

Systems integration & API development, answered.

Can you integrate Salesforce with QuickBooks or another accounting system?

We can evaluate the available APIs and requirements for connecting Salesforce with accounting platforms such as QuickBooks. It may involve customer records, approved invoices, or payment status. We define how records are matched and which system controls each type of information before building.

Can you connect software that doesn't have a built-in integration?

Often. We review whether the applications provide APIs, webhooks, supported imports/exports, database access, or other approved methods. If a connection is technically and contractually feasible, we recommend an approach.

Can you connect an older application to modern software?

In many cases. We assess legacy applications and databases to determine whether custom APIs, middleware, data exports, or a supporting application can bridge the gap.

Can you build an API for our existing software?

Yes. We develop APIs that let approved applications, mobile apps, websites, customers, or partners access appropriate functionality and data securely.

Will our data update in real time?

It depends on the platforms. Some support event-driven updates or webhooks; others require scheduled synchronization. We design around what each system supports.

How do you prevent duplicate or conflicting records?

We define record ownership, matching rules, validation, and update behavior, and depending on the integration, use unique identifiers, duplicate detection, and reconciliation.

What happens if an integration stops working?

We design logging, error handling, alerts, and recovery based on the importance of the workflow. Some issues retry automatically; others require review or vendor intervention.

Can you integrate Shopify with inventory or accounting software?

We can evaluate integrations between Shopify and supported inventory, fulfillment, ERP, and accounting platforms. The exact data and sync methods depend on the applications and available APIs.

Do we need to replace our existing business software?

Usually not. Our first goal is to understand what you already use and determine whether those systems can be connected or extended.

How much does business systems integration cost?

It depends on the number of applications, available APIs, data complexity, business rules, security, and support needs. We define scope and estimate the work before development.

Do you provide ongoing integration maintenance?

Yes. We monitor, maintain, and update integrations as systems and APIs change, or document them for your internal technical team.

Can you connect our business systems to AI tools?

Where appropriate, we build secure integrations that let AI-enabled applications work with authorized business information and approved actions, evaluating permissions, data handling, and human-approval requirements first.

Book a call

Tell us which systems don't talk to each other.

Tell us which applications your business uses and where information gets entered more than once, gets stuck, or doesn't match. Whether you're connecting two systems, building a custom API, or bringing several applications together, we'll help you understand what's possible and recommend a practical starting point.

Book a free call →