James Holwell
Co-founder at Abstract Leap
Greater Oxford Area United Kingdom
Summary
👤
SeniorJames Holwell is a co-founder and seasoned software developer with 13 years’ experience building cloud-native platforms that drive business transformation and growth. He combines hands-on engineering with management consulting, delivering scalable data- and technology-led solutions across B2B healthcare, public sector clients like HM Treasury and the NHS, and large private firms. At Abstract Leap he leads product and platform work, translating operational insight into practical, auditable systems that accelerate client outcomes. He is an active backend contributor to open-source projects such as the popular Dapper .NET library, where he added advanced multi-mapping and caching support. Based in the Greater Oxford Area, James pairs entrepreneurial grit with a consultant’s breadth, often surfacing non-obvious integrations between operational processes and technical architecture. His background makes him fluent in both strategy and implementation, able to take ideas from advisory recommendations to production-ready services.
13 years of coding experience
Stackoverflow
938reputation
293kreached
20answers
1question
Github Skills (12)
dotnet10
ado-net10
dapper10
csharp10
dotnet-core10
ado10
netframework10
sql9
iis-express6
macports6
php6
bash6
Programming languages (3)
Github contributions (5)
DapperLib/Dapper
Jul 2014 - Sep 2014
Dapper - a simple object mapper for .Net
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 7 comments in 1 month
Contributions summary:James primarily contributed to the Dapper library by adding support for features and fixing bugs. They added support for arbitrarily many types in multi-mapping functionality and implemented a method to include the `AddToCache` parameter for caching queries. The user also made improvements by adding references to system libraries and addressed merging of remote branches into the master.
dotnetobject-mapperdappersqlado-net
jamesholwell/AdventOfCode
Nov 2022 - Dec 2024
Contributions:157 pushes, 14 branches, 2 tags in 2 years 1 month
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