11/11/2026 updated

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MuleSoft Integration Specialist & Founder of Key Connection

Hoorn, Netherlands
Netherlands
MSc Political Science (International Relations), Vrije Universiteit Amsterdam
Hoorn, Netherlands
Netherlands
MSc Political Science (International Relations), Vrije Universiteit Amsterdam

Profile attachments

CV Roemer Mooijman - Key Connection (EN) - 2026-11.docx

About me

I connect systems that do not talk to each other by themselves, and the people behind them. 14+ years in integration: 10 with MuleSoft, before that the Oracle stack. Through my company Key Connection I also take over complete integration landscapes under an SLA.

Application Integration ArchitectureAtlassian ConfluenceIntegration Platform As A Service (IPaaS)Messaging Application Programming InterfaceMuleAnypoint StudioOracle Fusion MiddlewareSystems IntegrationEnterprise Application IntegrationOracle Integration SolutionsOracle SoaSAP Integration SolutionsCloudhubDataweaveCloud IntegrationOracle IntegrationSalesforce MuleSoft
MuleSoft Integration
Over ten years of hands-on experience with MuleSoft Anypoint Platform, including Mule 3 and 4, CloudHub 1.0 and 2.0, Runtime Fabric, on-premise deployments, API Manager and policies, Anypoint Exchange, and MUnit. Design and implementation of integrations following an API-led approach, from greenfield projects to taking over undocumented landscapes.

Oracle Middleware (Service Bus, SOA Suite, Fusion Middleware)
Extensive background in Oracle integration technologies, including Oracle Service Bus, Oracle SOA Suite, and Oracle Fusion Middleware. Technical design, development and maintenance of interfaces, orchestration, routing and transformation of messages across enterprise systems.

API-Led Architecture & Integration Tech Lead
Proven track record as integration tech lead in self-organising teams, contributing at architecture level and guiding team members. Translates between business, application management and technology, and bridges both sides of an integration to deliver robust, maintainable solutions.

DataWeave & Integration Languages
Proficiency in DataWeave 2.0, RAML, Java 8 and 17, Groovy, Python, SQL, PL/SQL, XSLT, XPath, XQuery, JSON, XML, and YAML for data transformation and integration development.

Protocols & Security
Knowledge of REST, SOAP, JMS, SFTP, OAuth 2.0, TLS and certificates for secure and reliable integration communication.

SAP & Enterprise Systems
Experience integrating SAP (ERP, Business One, SuccessFactors), Exact, AFAS, Personio, HubSpot, DocuSign, Shopify, and ServiceNow into integration landscapes.

Elasticsearch & Data Platforms
Setup and management of Elasticsearch indices and queries, Kibana dashboards, and integration with Oracle DB, MSSQL, MySQL, and MongoDB.

Delivery Pipeline & DevOps
Hands-on experience with Git, GitHub, Bitbucket, Azure DevOps, Jenkins, Bamboo, Maven, Nexus, JFrog Artifactory, and XL Deploy for CI/CD and lifecycle management.

Cloud & Platform
Working knowledge of CloudHub, AWS, Docker, Linux, Windows Server, Oracle WebLogic, and Tomcat as runtime and hosting environments.

Ways of Working
Familiar with Scrum, Kanban, ITIL, BiSL, and ASL frameworks for structured and agile project delivery.

Tooling
Regular use of Anypoint Studio, IntelliJ, Postman, SoapUI, Jira, and Confluence for development, testing, and project management.

Experience

Professional experience10+ years
Freelancer since2024

Languages

GermanBasic knowledgeEnglishFluentDutchNative speaker

Project history

Managed Services Partner (SLA)

SAF-HOLLAND
Manages the complete integration landscape of SAF-HOLLAND under a service level agreement. Took over approximately 30 integrations of three kinds: scheduled synchronisations from SAP to logistics partner DLX, APIs from DLX back to SAP, and enrichments within SAP. Also handles changes and lifecycle management.

MuleSoft Integration Specialist

Pon (Pon Datalab, Pon.bike)
Builds and maintains integrations for bicycle brands of Pon.bike and for the Pon Employee Database. Includes Lease a Bike country expansions, BBB Cycling multi-brand and multi-channel integrations with SAP and Elasticsearch, Cannondale landscape stabilisation, and HR integrations between AFAS, ADP, Dayforce, Personio and others.

Owner & Managing Director

Key Connection (RM IT Professionals B.V.)
Own company helping organisations with integration challenges through specialists on assignment, fixed-scope projects, and managed services for complete integration landscapes.

MuleSoft Integration Specialist

APG
Responsible for the MuleSoft landscape behind APG pension apps. Covers three funds (ABP, PWRI and BRD) with nearly 100 integrations. Tasks include design and implementation of middleware for new pension apps, reverse-engineering undocumented backends, and support and lifecycle management of the existing landscape.

MuleSoft Integration Specialist

SSC-ICT (Dutch Ministry of Foreign Affairs)
MuleSoft serves as the service bus between systems and domains at the Ministry of Foreign Affairs. Contributed to the move from point-to-point integrations to an API-led approach. Security, certificates, networking and connectivity were key. MuleSoft ran on-premise on Linux.

Employee

HybrIT
Software company founded by developers for developers, with professional growth at its core.

MuleSoft Integration Specialist & Tech Lead

Pon Datalab (then Pon Digital Solutions)
Built integrations between websites, file servers, databases and back-end systems such as SAP and Exact for brands including Lease a Bike, Gazelle, Derby Cycle, fietsNED, BBB Cycling and SAF-HOLLAND. As tech lead contributed at architecture level and guided team members. Also set up dashboards and provided second- and third-line support.

OSB Developer

DAS
Technical design, development and maintenance of interfaces on the Oracle Service Bus. Main project: implementing a new financial package, rewriting existing interfaces with minimal impact on source systems. Also improved the availability of the middleware platform.

Fusion Developer

Sociale Verzekeringsbank (Dutch social insurance bank)
Contributed to the transition to a new IT landscape on Oracle products with Fusion Middleware at its core for orchestration, routing and transformation of messages. Started in operations and deployments, grew into a full developer handling defects, unit tests, changes and new services in SOA Suite and OSB. Employed directly by SVB from 2014.

IT Trainee

Calco
IT traineeship followed by assignments at clients.

SAS Programmer

Nationale-Nederlanden
Standard and ad-hoc data deliveries via mainframe and Windows, maintenance of related programs, documentation and incident handling.

Certificates

MuleSoft Certified Developer L1 (expired)

MuleSoft (Salesforce)

2022

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