Deon Heyns
Head Of Technology at Nephila Capital
City of Hamilton, Bermuda
Summary
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SeniorDeon Heyns is a transformational technology leader with 14 years of experience building and scaling software and enterprise architecture for financial services, now serving as Head of Technology at Nephila Capital. He has risen internally from senior developer to lead technology strategy across London, Bermuda and the US for a ~$10bn insurance-linked securities manager, reducing operational complexity and costs while enabling new product capabilities. Deon blends hands-on engineering—contributing backend patches and tests to notable open-source projects like ServiceStack—with program-level delivery and startup incubation experience. He is comfortable across .NET ecosystems, API gateway ergonomics, and messaging systems (RabbitMQ), and has a knack for turning operational pain points into automated, auditable solutions. Based in Hamilton, Bermuda, he brings a pragmatic mix of technical depth, documentation attention to detail, and commercial focus that drives measurable business outcomes.
13 years of coding experience
14 years of employment as a software developer
Stackoverflow
123reputation
6kreached
5answers
0questions
Github Skills (24)
dotnet-new10
dotnet10
asp-net-core10
webservice10
rabbitmq10
api-documentation10
dotnet-core10
csharp10
documentation10
application-framework9
json9
app-framework9
api-gateway9
netcore9
web-framework9
Programming languages (3)
Github contributions (5)
ServiceStack/ServiceStack
Sep 2015 - Feb 2021
Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 commits, 12 PRs, 8 comments in 5 years 6 months
Contributions summary:Deon primarily contributed to the back-end functionality of the ServiceStack framework. Their commits introduced a `PATCH` method for JSON service clients, demonstrating API enhancements. They made RabbitMQ-related changes by making prefetch configurable and subsequently reverting a setting related to prefetch size. Additionally, the user added unit tests and implemented flags to relax the treatment of warnings and info as errors within the validation process.
actionscriptcsvxmlnet-frameworkframework
ThreeMammals/Ocelot
Jan 2019 - Jan 2019
.NET API Gateway
Role in this project:Technical Writer
Technical WriterContributions:6 commits, 6 PRs, 1 comment in 1 day
Contributions summary:Deon's contributions primarily focused on correcting typos and grammatical errors within the Ocelot documentation. They corrected several typos in various documentation files, including configuration, routing, request aggregation, service discovery, and features such as raft. The nature of the corrections indicates a focus on improving the clarity and accuracy of the documentation.
api-gatewayapidotnetnetstandard20gateway
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