Mert Türkoğlu

Software Engineer & Author · MSc Computer Engineering — I build backend systems, and AI systems that run on your own hardware and produce output reliable enough to ship.

Backend engineer by background (C# / .NET), now working on Retrieval-Augmented Generation, LLM integration, on-premise inference and vector search. Most of what I build answers the same question: how do you get useful, verifiable output out of a language model without a single byte leaving the network?

Currently doing an MSc in Computer Engineering (2026–).

Book

C# ile Programlama: .NET 10 ve C# 14 ile Temellerden Profesyonel Uygulamaya (2026, Turkish) — from Console.WriteLine to a tested, deployable Web API with a database and authentication. 42 chapters, 232 code listings, 296 exercises. On Google Play Books; the listings are in csharp-ile-programlama.

What I work on

• RAG & vector search — document chunking, embedding stores (Qdrant, PostgreSQL), semantic retrieval pipelines
• On-prem inference — Ollama, LM Studio, Gemma; sensitive data stays inside the network
• Structured-output reliability — strict JSON schemas, validation, a normalization layer that recovers malformed model output, and retries
• LLM serving infrastructure — OpenAI-compatible gateways, model aliasing, multi-key auth, streaming, embeddings endpoints

Open source

Contribution	What it was
cloudflare/workers-sdk	wrangler deploy --strict and versions upload --strict no longer flag an unchanged config as destructive: absent and undefined binding fields now compare equal in the config diff, across every binding type; with tests. Merged Oct 2026.
cloudflare/workers-sdk	Wrangler's workflows instances list and describe now retry transient failures without breaking --page pagination or --json output; with tests. Merged Oct 2026.
dotnet/maui	BlazorWebView URL parsing fix. Path.HasExtension() was run against the whole URL, so a query parameter like ?weight=62.5 looked like a file extension and blocked force-reload; the fix checks only the path component. Shipped in .NET 10.
microsoft/windows-drivers-rs	cargo wdk new now respects default VCS behavior — removed a hardcoded --vcs none. Merged Nov 2025.
UI5/webcomponents	Theming fix for read-only TextArea focus and border. Merged Sep 2024.

I also run BuzzSpire — an open-source organization, not a commercial company (I own the trademark; the org itself is a community project). Its main library is Nexar, an HTTP client for .NET: fluent request builder, typed responses, interceptors, exponential-backoff retries and auth helpers. 76+ tests, 100% pass, 95% coverage, MIT. BuzzSpire also makes Waggle, a hand-drawn whiteboard for teams.

I also founded ilettim, a one-person software studio: Changelog, Feedback, Odak and Özet.

Selected work

Project	What it is	Stack
Internal LLM Platform	Fully on-premise RAG assistant answering questions over company documents. Qdrant + PostgreSQL embedding store, chunking and semantic retrieval, local Gemma inference, API key management, one-command Docker Compose deploy.	.NET 9 · Next.js 15 · Qdrant · Ollama
ollama-middleware	OpenAI-compatible gateway in front of local models — /v1/chat/completions, /v1/completions, /v1/embeddings, /v1/models, Bearer auth, streaming, sampling passthrough. Model aliasing keeps the underlying model identity out of every response.	Node.js · TypeScript
Teams AI reporting pipeline	Meeting transcripts → deterministic, schema-conformant JSON reports (summary, decisions, action items, risks). Multi-tenant isolation, on-prem inference.	Next.js · Ollama · SQLite
On-prem assistant for OpenText SMAX	Manifest V3 Chrome extension embedding a local LLM inside an ITSM interface. Zero-click ticket context capture, prompt-injection hardening across three isolated JS execution contexts.	TypeScript · React · CRXJS
neuralnetwork3d	Watch neural networks train in live 3D in the browser — zero dependencies.	Python · HTML
onmic.io	Self-hosted, always-on WebRTC voice + screen share over a peer-to-peer mesh — no media server. coturn TURN for clients behind NAT, Caddy for automatic TLS, single docker compose up.	TypeScript · React · Fastify
csharp-ile-programlama	The 232 code listings from my book C# ile Programlama (.NET 10, C# 14), published on Google Play Books in 2026. Every listing is syntax-checked with Roslyn in the build pipeline.	C#
OCRmyPDF-Qt-GUI-Client	Multi-threaded Qt GUI for OCRmyPDF, 100+ languages.	Python · PyQt5

Toolbox

• AI/ML — RAG, LLMs, embeddings, vector search, semantic retrieval, structured-output validation, on-prem inference, Ollama, Gemma, Qdrant, PyTorch
• Languages — Python, C#, TypeScript, JavaScript, Rust, C/C++, SQL
• Backend — .NET 8/9, ASP.NET Core, EF Core, Node.js, microservices, REST, YARP API gateway, JWT auth, Clean Architecture, DDD
• Data & infra — PostgreSQL, SQL Server, Qdrant, Redis, Elasticsearch, Docker, Docker Compose, GitHub Actions, Cloudflare Tunnel
• Frontend — Next.js, React, TypeScript, Tailwind CSS
• Enterprise — Siemens Teamcenter PLM (ITK, SOA, Active Workspace), SAP T4S, OpenText SMAX, Active Directory / LDAP, Microsoft Graph

Day job

Backend and enterprise integration, on-site in İstanbul: secure integration services between Siemens Teamcenter PLM, SAP and ITSM systems — Teamcenter server extensions and custom handlers in C/C++ (ITK), SOA and REST services in C# / .NET, a YARP-based API gateway with JWT auth, AD/LDAP and Microsoft Graph user sync, PostgreSQL and SQL Server, Docker and CI/CD. The AI work above is all personal.

Elsewhere

• Website — mertturkoglu.com
• LinkedIn — in/18w