Senior Integration Architect, API Design, Apigee, Event Streaming, SAP, Google Cloud, Remote

Project overview

For upcoming modernization projects with mid-sized companies in the DACH region, we are looking for experienced Integration Architects (m/f/d) to join our expert pool. The work is 100% remote, and we welcome applications from anywhere in the world.

A typical project looks like this:

Starting point

An established business application is being modernized and migrated to Google Cloud. Over the years it has grown together with surrounding systems: master data and postings are exchanged with an ERP (e.g. SAP S/4HANA or ECC), plus CRM, document management, payment providers and partner portals, partly via file interfaces and nightly batch jobs. The goal is an integration architecture with clear responsibilities, versioned APIs and event-based coupling that supports the step-by-step migration without service interruption.

An SAP architect is responsible for the SAP side of the interfaces; you are responsible for the application and cloud side.

Responsibilities

• Inventory and assess existing interfaces (protocols, data flows, dependencies, failure patterns)
• Design the target integration architecture: integration patterns (synchronous, event-based, batch), data ownership, error and retry strategies
• Set up API design and API management (OpenAPI, versioning, Apigee or API Gateway, security with OAuth2)
• Design event-based coupling with Pub/Sub or Kafka, including schema management and idempotency
• Specify the ERP integration together with the SAP architect (e.g. OData, SAP Integration Suite) and steer the implementation on the application side
• Plan the migration path for interfaces: parallel operation, cut-over, rollback
• Ensure observability and operation of the integrations (monitoring, alerting, traceability)
• Document the integration architecture, present decisions to decision-making bodies and guide the development teams

Requirements

• At least 7 years of experience in software development or architecture, including at least 4 years as an integration or API architect in production enterprise landscapes
• Proven responsibility for API design and API management (OpenAPI, versioning, gateway) and for event-based integrations (Kafka or Pub/Sub)
• Experience with at least one ERP integration from the application side (e.g. SAP via OData, IDoc or Integration Suite)
• Practice in cloud environments (Google Cloud preferred, alternatively AWS or Azure) and in replacing file and batch interfaces
• Fluent English
• At least 4 hours of daily overlap with Central European Time (CET)

Nice to have

Terms

Application

Please answer briefly:

In email communication please always include the project ID of this ad. Please do not call unless an appointment has been arranged.

(Integration Architecture, API Design, API Management, Apigee, REST, OpenAPI, Kafka, Event-Driven Architecture, SAP Integration, OData, Google Cloud Platform, Microservices)

Job facts: Direct client project

• Apigee, Cloud Run, Eventarc and Workflows on Google Cloud
• Integration platforms such as SAP Integration Suite, MuleSoft, Boomi or Apache Camel
• Schema management (Avro, Protobuf, Schema Registry) and contract testing
• Security and data protection concepts for interfaces (GDPR, tenant separation)
• Certifications (e.g. Google Professional Cloud Architect, TOGAF, iSAQB CPSA)
• Experience working in agile, distributed teams
• German language skills
• Location: 100% remote
• Duration: typically 4 to 6 months, extension possible
• Workload: 80 to 100 percent
• Start: depending on the project, from Q1 2027
• Contract: freelance, invoicing in EUR
• Which integration architecture were you most recently responsible for (surrounding systems, number of interfaces, your role, scale)?
• How do you make sure that interfaces do not become a bottleneck or a source of errors during a step-by-step migration?
• What is your hourly rate in EUR, where are you based (country and time zone), and when are you available?

Project details

• Start: 2027-01
• Duration: 6 Monate
• Remote: remote
• Location: BerlinBrandenburg, Deutschland, DE
• Languages: English, German