Christiaan Knaap
Chief Architect at Firely
Randstad, Netherlands
Summary
👤
Senior🎓
Top SchoolChristiaan Knaap is a seasoned software leader and Chief Architect with 12+ years focused on healthcare IT and FHIR-powered platforms. He blends hands-on backend engineering (.NET, Java, MongoDB, SQL) with product and information-architecture experience to deliver pragmatic, secure integrations for clinical systems. At Firely he progressed from lead developer to Head of Product and now Chief Architect, driving the Vonk/Spark FHIR servers and contributing performance and search improvements to the open-source Firely projects. Colleagues rely on him for technical coaching, product guidance, and the rare combination of deep protocol knowledge plus business-facing communication. He holds an MSc in Mathematics and often bridges detailed technical fixes (e.g., MongoDB criteria extensions and $everything support) with higher-level interoperability strategy. Based in the Randstad, he’s equally comfortable deploying cloud-backed FHIR servers as he is shaping long-term health IT roadmaps.
12 years of coding experience
20 years of employment as a software developer
drs / MSc, Mathematics, drs / MSc, Mathematics at Vrije Universiteit Amsterdam (VU Amsterdam)VWO, VWO at Alkwin Kollege Uithoorn
English, Dutch
Github Skills (19)
back-end-development10
apidoc10
net10
dotnet10
mongodb-database10
smart-on-fhir10
asp-net10
api10
dotnet-core10
hl7-fhir10
csharp10
mongodb10
testing9
searching9
netframework9
Programming languages (8)
Github contributions (5)
FirelyTeam/spark
Apr 2014 - Oct 2016
Firely and Incendi's open source FHIR server
Role in this project:
Back-end Developer
Back-end DeveloperContributions:158 commits, 1 PR, 51 pushes in 2 years 7 months
Contributions summary:Christiaan primarily worked on the Spark FHIR server's backend, making adjustments to incorporate Fhir.Net.API for search functionality. They implemented criteria extensions for MongoDB, specifically for number, string, and date parameters. The user also addressed references and token queries, and fixed performance bottlenecks within the MongoDB-backed store. Furthermore, the user also provided support for the $everything operation.
firelyspark-fhir-serverfhirdockerfhir-server
FirelyTeam/firely-net-sdk
Apr 2014 - Aug 2016
The official Firely .NET SDK for HL7 FHIR
Role in this project:Back-end Developer
Back-end DeveloperContributions:7 reviews, 18 commits, 3 PRs in 2 years 4 months
Contributions summary:Christiaan made several contributions related to the Firely .NET SDK, including fixing tests, updating the FHIR client, and modifying code related to URI parameters and search queries. They addressed issues related to endpoint handling and parameter parsing, focusing on the API's REST functionality. The user's work directly impacted the functionality and testing of the FHIR client within the SDK.
structuredefinitionhl7fhirfhir-parserfirely
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