Software Integration & API


Client Challenges

Integration Challenges Affecting Daily Operations And Data Reliability

Companies may start looking for system integration services when existing systems create operational gaps, or when a new product, platform, or business process needs to connect with other systems. In both cases, integration becomes part of how data, workflows, and responsibilities are coordinated across the business.



Service Overview

API And System Integration Across Design, Data Flows, And Production Operations

Solbeg combines API engineering, third-party connectivity, data synchronization, and operational support within the same integration scope. The work can focus on publishing a new API, consuming external interfaces, connecting internal systems, or coordinating several of these responsibilities within one engineering engagement.

API design and development

Design and implementation of REST, GraphQL, and event-driven interfaces for internal applications, partner systems, and external developers. This can include schema design, authentication, versioning rules, and documentation for API consumers.

Third-party and SaaS connections

Connecting your product to external platforms through APIs, webhooks, and file-based exchanges, including sandbox validation where available, rate-limit handling, failure processing, and credential management. These API integration services are often required when a product feature depends on an external platform.

System-to-system data synchronization

One-way and bidirectional data flows between systems that hold overlapping records, with a defined authoritative source, conflict-resolution rules, and reconciliation procedures. The scope can include both scheduled batch exchanges and event-driven updates.

Integration architecture and middleware

Design of a shared integration layer where multiple systems exchange data through an API gateway, message broker, or orchestration service instead of maintaining independent point-to-point connections. This becomes relevant as the number of connected systems grows and shared rules need consistent ownership.

Connectivity for legacy and internal systems

Providing modern interfaces to older systems when replacing or extensively modifying the source application is not practical. Depending on the system, legacy system modernization can involve database-level access, file exchange, SOAP interfaces, or wrappers around proprietary protocols while the existing application continues to operate.

Documentation, monitoring, and versioning

Machine-readable specifications, changelogs, consumer environment setup, logging, alerting, and version-management practices for the integration itself. These capabilities within software integration solutions help teams operate and update integrations after the initial implementation is complete.


Problem & Solution



The problem

A significant part of an integration depends on systems your team does not control

Your team understands its own domain model, data, and release process. What may be less clear is how an external system behaves under load, which fields are actually optional, how partial failures are reported, how rate limits are enforced, or what happens when the same request is received more than once. Some of this behavior can only be confirmed during implementation and testing, which makes integration work harder to estimate than functionality contained within one application.

Integration work also competes with the existing product roadmap. A connection may initially be built around the expected path, while retries, idempotency, duplicate handling, reconciliation, and operational monitoring are postponed. Those gaps become significantly more expensive to address once the integration is already carrying production data.

Data ownership creates another layer of complexity. When two systems contain the same customer, order, product, or price, the project needs a clear decision about which system is authoritative and how conflicts should be resolved. These decisions often involve product, operations, finance, and other business stakeholders alongside engineering.

Ownership after release also has to be explicit. An integration can operate for months without intervention and then require immediate action when a provider changes an endpoint, authentication method, or data format. Without a defined operational owner, responsibility becomes unclear precisely when a fast response is required.

Solbeg's approach

Integration contracts, failure handling, and ownership are defined before production rollout

Solbeg starts by understanding both sides of the connection. External documentation, sandboxes, test accounts, and other available validation methods are used to confirm actual interface behavior and identify constraints that affect implementation. The resulting contract becomes the basis for planning and estimating API development and integration services.

Each integration is treated as a defined engineering workstream with explicit failure behavior. Retry policy, timeouts, idempotency, duplicate protection, failure handling, and message replay are addressed where they are relevant to the selected integration model.

Data ownership is documented together with client stakeholders. For shared entities, the project defines which system is authoritative, which fields are synchronized, how conflicts are resolved, and how inconsistencies are detected. Custom software integration is easier to operate when those rules are explicit and understood by both technical and business teams.

Operational readiness is included in the delivery scope. Logging and alerting, interface versioning where applicable, documentation, and runbooks give the responsible team a defined way to detect and respond to integration failures after release.


When this service fits

Business And Technical Scenarios Requiring Dedicated Integration Engineering

Dedicated integration work becomes necessary when connections have to support multiple consumers, transitional system states, auditable data exchange, or business processes that cross application boundaries. Solbeg scopes custom API integration services around the architecture, data ownership, testing, and operational controls required by each case.

The existing system may have been built only for its current web interface and may not expose a stable contract for other clients. Before mobile development can rely on it, the required business capabilities need to be exposed through an authenticated and versioned interface that can continue evolving after the first app release.

After an acquisition, the business may temporarily have two CRMs, finance platforms, warehouse systems, or other applications performing similar roles. Until consolidation is complete, records need to move between the environments under clear rules about ownership and conflict resolution. The expected lifespan of that transitional integration affects how it should be designed.

A partner or enterprise customer needs programmatic access to your product, but existing internal endpoints were not designed for external consumers. A public or partner API requires a stable contract, authentication and authorization, rate limiting where appropriate, versioning, documentation, and a suitable environment for integration testing.

During a phased migration, the old and new systems may operate at the same time and require synchronized data. The integration needs to account for records created or modified on either side, reconciliation, and the possibility that individual migration steps need to be reversed.

An approval, onboarding, or fulfillment process may move across several platforms while employees manually transfer data and trigger the next step. Automating the process requires orchestration logic and process state that may not belong naturally to any one of the existing applications.

The connection is still running, but its behavior, dependencies, or failure handling may not be documented. Solbeg can begin by reverse-engineering the existing implementation, adding observability and test coverage, and documenting current behavior before deciding what needs to be changed or rebuilt.

A regulator, auditor, enterprise customer, or internal control process may require traceability of what data was transferred, when it moved, which system initiated the action, and who had access. Logging, retention, authorization, and auditability then become functional requirements of the integration itself.


Scope of Work

Engineering Responsibilities Across An Integration Engagement

Solbeg defines the integration scope around the systems involved, the direction of data exchange, and the operational responsibilities attached to each connection. An engagement can cover publishing an interface, consuming one, synchronizing data, or combining these tasks within the same delivery model.

Integration architecture

Definition of the connection model for each integration, including direct, gateway-mediated, and event-driven approaches. The scope can include interface contracts, authentication, data exchange patterns, error semantics, and architectural decision records explaining why a particular approach was selected.


Why Solbeg

How Solbeg Connects API, Application, And Integration Engineering

Solbeg treats integration as production engineering that has to remain understandable, observable, and maintainable after release. API work can draw on backend, frontend, QA, data, and infrastructure capabilities within the same engineering organization.

Engineering capabilities across multiple technology stacks

Solbeg teams work across .NET, Java, Python, Node.js, and PHP on the server side and React, Angular, and Vue on the client side. For teams comparing an API integration company, the ability to work across both sides of the connection can reduce handoffs between separate suppliers and keep implementation decisions within one engineering context.


Comparison

Point-To-Point Integrations Vs. A Shared Integration Layer

Most API integration solutions use direct system-to-system connections, a shared integration layer, or a combination of both. The architecture depends on the number of connected systems, expected growth, shared transformation and failure-handling rules, and who will operate the resulting integration environment.

Option A
  • Suitable for a small and relatively stable set of connections
  • Can provide a shorter path to the first working integration because no shared platform has to be introduced first
  • Often requires less additional infrastructure for a limited number of connections
  • Complexity can grow quickly as more systems and connections are added
  • Mapping and business rules may become distributed across several applications
  • Responsibility for support can become fragmented between the teams that own the connected systems
  • End-to-end monitoring becomes harder when each integration exposes failures differently

A direct model works well when the number of connected systems is limited, significant growth is not expected, and ownership of each connection is clear.

Option B
  • Suitable for environments where several systems exchange data and new connections are added regularly
  • Shared patterns can reduce the amount of work required when another system or partner is added
  • Mapping, retry, transformation, and failure-handling rules can be managed more consistently
  • Centralized logging and monitoring can provide a broader view of integration activity and failures
  • Requires more architecture and platform work before the first connections are complete
  • Introduces an additional component that has to be deployed, secured, monitored, and maintained
  • Requires clear ownership so the integration layer does not become another undocumented dependency

A shared integration layer becomes more useful as the number of connected systems grows, when several teams depend on the same data flows, or when integration activity needs centralized monitoring and governance.


Engagement Process

Integration Delivery From System Assessment To Production Handover

Solbeg structures integration delivery so architecture, data ownership, external-system constraints, and failure behavior are resolved before broad production rollout. Larger programs can overlap individual activities, but the same technical and operational decisions still need explicit ownership.

  1. Discovery and system audit

    We review the systems on both sides of each connection, the relevant data models, available documentation, existing access, and known constraints of external providers. Your engineers and the stakeholders responsible for the business process participate where their knowledge is needed. The result is an agreed view of the connections in scope and the main technical and operational risks.

  2. Contract and architecture definition

    The connection model, interface contracts, authentication approach, data mapping, failure behavior, and authoritative system for relevant shared entities are defined and reviewed with technical and business stakeholders. These decisions provide the basis for implementation and testing.

  3. Implementation against test environments

    Engineers build the integration incrementally using sandbox, test, or mocked endpoints where appropriate and available. Failure handling is implemented together with the corresponding integration behavior instead of being postponed to a later phase. Completed increments can be reviewed in an agreed environment as work progresses.

  4. Testing under failure conditions

    QA validates the expected contract and relevant failure scenarios, including timeouts, partial responses, duplicate deliveries, rate limits, and expired credentials. The exact scenarios depend on the behavior and risks of the connected systems.

  5. Production rollout

    The integration is introduced according to an agreed rollout plan, with rollback procedures defined where required. Depending on the project, rollout can include limited traffic, selected records, a parallel run, or reconciliation against the previous process before responsibility fully moves to the new integration.

  6. Monitoring and handover

    Logging, alerting, documentation, and runbooks included in the agreed scope are delivered together with the integration. Your team is taken through the normal behavior and expected failure modes of the API integration solution. If ongoing support is part of the engagement, work can continue with provider updates, operational changes, and additional connections.


Completed projects

View all projects

Some of our recent work

Real products our team has designed, developed, and launched together with clients, from idea to release.

Oil & Gas

Oil & Gas/QA/Software Development/Web Development

Data Automation Platform for Oil & Gas Operations

Mobile and web platform for vehicle service and ownership management

View project
Driver Performance and Fleet Management Solution

Logistics & Transportation/Software Development

Driver Performance and Fleet Management Solution

Telematics platform for fleet, driver, and vehicle management

View project
Telemedicine Solution for Online Doctor Consultations

Healthcare/Web Development

Telemedicine Solution for Online Doctor Consultations

Telemedicine platform for online consultations and patient care

View project

FAQ

Key Questions Before Starting An Integration Engagement

Yes. An engagement can start with incomplete or outdated documentation. Where safe test environments are available, actual behavior can be validated against a sandbox, test account, or other agreed environment and documented as part of the working contract. Behavior that cannot be confirmed safely is recorded as a risk instead of being assumed.

Not necessarily. Depending on the capabilities of the existing system, integration may be possible through an existing interface, database-level access, file exchange, SOAP, or a wrapper around a proprietary protocol. Replacement becomes a separate consideration if the current system cannot support the required reliability, performance, security, or data consistency.

Code ownership, repository location, credential ownership, access rules, and handover requirements are defined for the engagement. Where work is performed in client-controlled repositories and accounts, provider credentials and production access can remain under the client’s established security and IT processes.

Versioned contracts, automated tests, monitoring, and documented dependencies make provider changes easier to identify and validate. Announced deprecations can be handled as planned engineering work, while monitoring and alerting help detect unexpected failures before they affect a wider business process.

Yes. At Solbeg, a takeover starts with documenting current behavior, dependencies, interfaces, and operational risks before changes are introduced. Test coverage and observability can then be added where necessary. When evaluating API integration companies, this is an important distinction: existing behavior should be understood before a rebuild is proposed.

Authentication, authorization, encryption in transit, secrets management, retention requirements, and logging rules are defined according to the integration scope and applicable security requirements. Access is limited to the systems and identities that require the data for the agreed process.

Both types of work can be included. Solbeg can consume existing external interfaces or design and publish a new API for internal teams, partners, or customers. Working with a software integration company that covers both API development and integration allows the interface contract and consumer requirements to be addressed within the same engineering scope.


Related Services

You may also need

End-to-end services to build, launch, and grow your digital product.

We use cookies to optimise site functionality and enhance your experience.

I agree