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Mert Küçükkapdan

@mertkkkapdan

Full Stack Developer at Meselium, where I built a second-opinion platform and shipped two apps to the App Store and Google Play.

Turkey

Message

What I'm looking for

I'm seeking a fully remote role where I can take ownership of features end-to-end.

At Meselium, I founded a self-funded second-medical-opinion platform connecting patients with specialist physicians. I built its Next.js and React frontend and custom REST API, then shipped the patient journey from doctor selection through report delivery.

I added secure DICOM and PDF uploads, payment, realtime updates, and verification codes. The platform also includes encrypted national IDs, two-factor authentication, KVKK consent flows, and e-Nabız integration.

As an independent developer, I shipped Wymco, a 13-language vocabulary app, and Akıllı Asistan, an AI-powered education assistant, to Google Play and the App Store. I also built Hasarlı Bayrak Tespiti, a computer-vision app for detecting damage on large flags.

At Outlier AI, I trained and evaluated large language models by creating and answering computer-science questions, and reviewed and improved AI-generated code. Earlier, as Operations Manager at an international company, I grew daily transaction volume from TRY 50,000 to TRY 4,000,000 over five years and managed a 30+ person team.

Experience

Work history, roles, and key accomplishments

Current

Lead Developer & Founder

Current

Meselium

Jan 2024 - Present (2 years 9 months)

Founded a self-funded second-medical-opinion platform connecting patients with specialist physicians. Built the Next.js 14 frontend with a custom REST API and realtime updates, and shipped the patient journey end-to-end including secure uploads and payment.

Next.js React Tailwind REST APIs Socket.IO S3 DICOM AES GCM TOTP KVKK E Nabız AI assisted Development

Current

Independent Developer (Freelance)

Current

Self-employed

Jan 2024 - Present (2 years 9 months)

Shipped multiple apps to Google Play and the App Store, including a 13-language vocabulary app and an AI-powered education assistant. Delivered freelance web and mobile projects for external clients.

Flutter React Native Next.js Firebase Python REST APIs Mobile Development AI assisted Development

AI Trainer (Freelance)

Outlier AI

Nov 2024 - Jan 2026 (1 year 2 months)

Trained and evaluated large language models by creating and answering computer-science questions. Reviewed, ranked, and improved AI-generated code to raise model quality.

LLM Training Evaluation Code Review Computer Science

Junior Software Developer (Part-time)

Siliconmade Academy

Jan 2025 - Jul 2025 (6 months)

Provided technical support to students learning software development. Contributed to training materials and assisted in software development processes.

Technical Support Training Software Development

Operations Manager

International company (confidential)

Jan 2016 - Jan 2024 (8 years)

Grew daily transaction volume from TRY 50,000 to TRY 4,000,000 over five years through process innovation and performance systems. Managed a 30+ person operations team including hiring, training, and day-to-day leadership.

Operations Management Team Leadership Process Optimization Digital Integration AI Chatbots