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Haitem El AaouaniHE

Haitem El Aaouani

Integration Engineer / Interoperability

€400/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Haitem

Health system integration engineer, certified HL7 Interface Specialist, with over 4 years of experience within the NHS ecosystem in the UK. I work on complex integration projects involving HL7 v2 and FHIR standards (UK-Core, GP Connect), Mirth Connect and InterSystems IRIS engines, as well as Python, JavaScript, and SQL development.
I have led the migration of over 1,000 interfaces in production for several NHS hospitals in England, with minimal impact on service continuity.
My profile combines solid technical expertise with the ability to manage projects from planning to validation, in close collaboration with business and technical teams.
  • French

    Native or bilingual

  • English

    Native or bilingual

  • Arabic

    Native or bilingual

Can work on-site
Paris (up to 50km), Lyon (up to 50km), Marseille (up to 50km), Toulouse (up to 50km), Bordeaux (up to 50km)

Experience

  • The Access Group Loughborough
    Health Integration Engineer
    MEDICAL
    August 2024 - April 2026 (1 year and 8 months)
    Loughborough, United Kingdom
    • Migrated over 1,000 integration channels (versions 3.5.1/3.9.1 to 4.5.2) with minimal downtime.
    • Upgraded Mirth Connect across six environments, including planning, testing, execution, and validation.
    • Investigated and refactored JavaScript code to resolve version compatibility issues.
    • Collaborated with stakeholders to assess and ensure data integrity post-migration.
    • Monitored application performance using New Relic.
    • Stack: Healthcare IT, HL7/FHIR, Mirth Connect, SSL, SQL Server, JavaScript, T-SQL, Python 3, PowerShell, New Relic.
    Mirth Connect FHIR HL7 Healthcare SQL
  • Answer Digital Leeds
    Health Integration Engineer
    MEDICAL
    January 2022 - January 2024 (2 years)
    Leeds, United Kingdom
    • Implemented the NEMS (National Event Management Service) interface via InterSystems for NHS MFT.
    • Developed an HL7-FHIR transformation interface for NHS NCA; participated in the deployment of an HAPI FHIR-based FHIR server.
    • Created an eRS (Electronic Referral System) implementation for NHS Rotherham, integrating NHS FHIR APIs.
    • Stack: HL7/FHIR, InterSystems IRIS, Caché ObjectScript, SQL, Python 3, HAPI FHIR, NHS GP Connect, NEMS, UK Core.
    FHIR HL7 IRIS Interoperability SQL Server
  • Imtech Solutions
    Odoo Consultant
    January 2020 - January 2021 (1 year)
    Toulouse, France
    • Analyzed workflows and designed a functional process implemented in Odoo V13.
    • Developed custom modules: coding, testing, and production deployment.
    • Trained and supported end-users.
    • Stack: Odoo, Python 3, QWEB (XML), PostgreSQL.
    Python qweb SQL odoo

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Education

  • HL7 Interface Specialist Certification HL7 v2
    FHIR
    Certification HL7 Interface Specialist HL7 v2
  • Mirth
    Mirth

Certifications

Skill set

Categories