Tolga Kayhan
Senior Software Engineer at Definely
Stony Stratford, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolTolga Kayhan is a Senior Software Engineer and architect with over 10 years' experience building .NET backends and scalable cloud solutions across Azure, AWS and GCP for high-demand products like LIV Golf, Domino’s and UK rail operators. He combines hands-on engineering with solution design, specializing in API-first architectures that bridge mobile and web clients and thrive in both greenfield and legacy environments. As founder of Betalgo and creator of the betalgo.OpenAI .NET SDK—now with over a million NuGet downloads and a notable GitHub presence—he brings practical LLM integration experience to production systems. Tolga is comfortable leading projects end-to-end, from rapid prototyping to robust, observability-driven operations, and has a track record of delivering under tight deadlines and complex third-party integrations. Based in the UK, he blends startup agility with enterprise-grade practices and a knack for turning cutting-edge AI features into reliable developer-facing libraries.
10 years of coding experience
14 years of employment as a software developer
Aydın Atatürk Anadolu LisesiBachelor's degree Computer Engineering, Bachelor's degree Computer Engineering at Kocaeli University
İngilizce
Stackoverflow
356reputation
24kreached
5answers
3questions
Github Skills (21)
apim10
openai-api10
apidoc10
net10
dotnet10
asp-net10
api10
sdk10
dotnet-core10
csharp10
json-serialization10
chatgpt9
azure6
logging6
moq6
Programming languages (3)
Github contributions (5)
betalgo/openai
Nov 2021 - Jan 2023
.NET library for the OpenAI service API by Betalgo Ranul
Role in this project:
Backend Developer
Backend DeveloperContributions:51 releases, 22 reviews, 108 commits in 1 year 2 months
Contributions summary:Tolga primarily contributed to the .NET-based SDK for OpenAI, focusing on creating and updating request models. Their work included defining data structures for API requests like CreateCompletionRequest, CreateClassificationRequest, and CreateAnswerRequest, all involving JSON serialization. The user also updated the SDK interface, implemented several API endpoints, and added features like logit bias, temperature, and other parameters. The code demonstrates a strong focus on building a functional .NET library for interacting with the OpenAI API.
sdk-dotnetdotnetdall-eazure-cognitive-servicesazure-cosmos-db
betalgo/LCE-DotNet-SDK
Jan 2021 - Dec 2022
Contributions:54 commits, 34 PRs, 67 pushes in 1 year 11 months
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