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Ahmed Semih Özmekik
From Turkey 04:41 PM (GMT+03:00)
$45/hr or $75,000/yr

Active 1 hour ago


Member since Nov 2026

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Software Engineer

Back-end Engineer
Available for hire
Years of experience
6+ years
Experience level
Senior
Available for
Full-time, Part-time, Contract, Freelance
Download Resume / CV

I’m a software engineer from Istanbul with six years of experience, and I’ve worked at nearly every layer of the stack. I started in modern C++ on a packet inspection engine running at multi-gigabit line rate, then spent four years on a six-person remote team at a US company, building and running a platform for clinicians with over a million registered users. Alongside that, I built NextLangua on my own, an AI language-learning app with 20,000+ downloads, covering everything from the FastAPI backend and React Native app to the Kubernetes cluster, payments, and fine-tuned models I serve myself.

What makes me different is the mix. I’m an engineer who also writes: I’ve published three books in philosophy and a Linux and C course with 5,000+ students, so I care about explaining things clearly as much as building them. I speak Turkish, English and Arabic, and I chair a charity running education programs for migrant children.

I’m looking for a remote role as an AI/LLM engineer, or a senior full-stack or backend role with real ownership. I’m open to full-time, long-term contract, or founding-engineer roles at early startups.

Languages

No languages.

Employment History

Founder & Engineer at NextLangua (Fergani Yazılım ve Teknoloji Ltd. Şti.) Current 2025 - Now
Built an AI language-learning platform alone, from first commit to the App Store and Google Play, with 20,000+ downloads. Wrote the backend as an async FastAPI service routing across OpenAI, Anthropic, Gemini and self-hosted models, with tool calling, MCP servers, RAG, structured outputs and token streaming over WebSockets and SSE. Built an LLM-as-judge evaluation harness that gated every model change. Fine-tuned Qwen, Gemma and Llama with LoRA/QLoRA, quantized them from 16 GB to under 5 GB and served them on vLLM and llama.cpp, cutting inference cost to near zero. Built a live voice pipeline on self-hosted Whisper with sub-second turn-taking and a credit-metered subscription system across Apple In-App Purchase, Stripe and iyzico. Designed the GKE cluster and CI, shipped the React Native app, React PWA, Next.js admin panel and Chrome extension, and handled on-call, observability, store listings and growth experiments.
Full Stack Developer at Disque Foundation 2022 - 2026
Worked on a six-person team on a certification and continuing-education platform for clinicians (CPR, ACLS, PALS, BLS) with 1M+ registered users and regulated healthcare data. Replaced a failing third-party LMS with one built in-house and split the WordPress monolith into a decoupled Nuxt and Java Spring application with single sign-on. Migrated the data layer from SQL to Firestore on Google Cloud with no downtime. Handled Linux administration, containers, CI/CD, monitoring, rate limiting, zero-downtime releases and on-call. Built and shipped two iOS/Android apps, MediCode and CertAlert+, and migrated the CRM from Infusionsoft to Mailchimp
Software Development Engineer at Nettsi 2021 - 2022
Built and reviewed features in modern C++ (17/20) for a Deep Packet Inspection engine processing traffic at multi-gigabit line rate. Reverse-engineered application traffic and implemented statistical and signature-based protocol classifiers. Wrote a Python pattern-extraction tool that shortened signature development. Worked test-first with unit and integration tests, mandatory peer review and GitLab CI/CD.
Full Stack Developer at Elmak 2021 - 2021
Delivered a SCADA system used during construction of Istanbul metro lines, covering architecture and application, live WebSocket telemetry dashboards, time-series storage in InfluxDB, alarm handling and reporting.

Education

Bachelor of Computer Science at Gebze Technical University 2017 - 2021