Brian Postlethwaite
Principal Software Engineer at Microsoft
Melbourne, Victoria, Australia
Summary
👤
Senior🎓
Top SchoolBrian Postlethwaite is a Principal Software Engineer based in Melbourne with over two decades of experience designing resilient, user-focused systems across healthcare, publishing and fast transactional domains. He combines hands-on backend engineering with solution architecture expertise—particularly around databases, integrations and software migrations—and has driven HL7 FHIR standards work both in industry roles and via contributions to prominent FHIR and Firely .NET SDK repositories. Comfortable in legacy and modern stacks, he excels at reconciling user and business needs in complex, concurrent multi-user environments such as real-time publishing and clinical eReferral systems. At Microsoft and prior roles at Telstra Health and specialist consultancies he has led cross-product frameworks and interoperability efforts that reduce operational friction in critical systems. His background shows a mix of meticulous QA/code-cleanup work on standards projects and pragmatic system design, reflecting a preference for durable, well-tested solutions over band-aid fixes.
11 years of coding experience
28 years of employment as a software developer
The University of MelbourneBallarat Grammar
Stackoverflow
199reputation
5kreached
18answers
0questions
Github Skills (21)
net10
dotnet10
asp-net10
smart-on-fhir10
dotnet-core10
code-cleanup10
hl7-fhir10
csharp10
unit-testing9
serialization9
data-serialization9
documentation9
xml7
timezone6
iso6
Programming languages (13)
Github contributions (5)
FirelyTeam/firely-net-sdk
Nov 2016 - Sep 2022
The official Firely .NET SDK for HL7 FHIR
Role in this project:
Back-end Developer
Back-end DeveloperContributions:39 reviews, 260 commits, 43 PRs in 5 years 11 months
Contributions summary:Brian primarily focused on implementing and refining FHIR (Fast Healthcare Interoperability Resources) SDK functionality. Their contributions involved adding support for features such as setting a different default symbol table, and unit testing positive integer type conversion. They also implemented and tested the fluentpath hasValue() implementation, adding support for custom fluentpath functions. Additional work included modifications to search parameter fluentpath expressions, the code system in enumeration and unit tests, fixing serialization bugs, and code cleanups.
structuredefinitionhl7fhirfhir-parserfirely
HL7/fhir
Oct 2018 - Dec 2022
Official source for the HL7 FHIR Specification
Role in this project:Backend Developer
Backend DeveloperContributions:20 reviews, 352 commits, 199 PRs in 4 years 2 months
Contributions summary:Brian primarily contributed to the HL7 FHIR specification repository, focusing on QA updates and code cleanup within the administration module. The commits demonstrate involvement in refining existing code, fixing typos, and merging changes from the master branch. These updates were likely for quality assurance and ensuring the specification's accuracy.
hl7-fhirhl7fhirspecificationtla
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.