Sezgin Saygili

Founding engineer at Patientdesk.ai

I'm a founding engineer at Patientdesk.ai, a YC W26 company building an AI phone system for dental clinics. I work on the control plane, the voice runtime and the integrations into clinic software, and on the research side at Patientdesk Labs.

Alongside that I built ImpliedOptions, an options analytics platform for web and mobile. I studied economics at Aalto and worked there as a research assistant.

based San Francisco / Helsinki
email [email protected]
cv PDF, two pages

Detail

Patientdesk

The control plane is TypeScript and Next.js; the voice runtime is Python and FastAPI. Both run in two regions, US and Australia, against separate Supabase projects. The agents answer calls, book and reschedule appointments, check insurance and take payments, writing into OpenDental, CareStack, CorePractice, Dental4Windows and NexHealth. I built the call observability, the tenant isolation and encryption, and the deployment flow that moved clinic onboarding to self-serve.

TypeScript · Next.js · Python · FastAPI · Supabase · PostgreSQL · GCP · LiveKit · ElevenLabs · Stripe

ImpliedOptions

Options analytics on web, iOS and Android. Python services read the options tape, classify trades as blocks, sweeps or multi-leg strategies, add Greeks and open interest, and write history into partitioned Postgres so long lookbacks stay fast. On top of that: IV rank and percentile, gamma exposure, expected moves, max pain, Black–Scholes P&L and backtesting, served over streaming APIs with push alerts.

Python · FastAPI · PostgreSQL · Docker · Next.js · React

VoiceData

A marketplace where people are paid to record voice data. Contributors apply, record in the browser, on mobile or over a LiveKit call; submissions go through automated QA and human review; approved work is paid out weekly. It supplies the training and evaluation data for the model work at Patientdesk Labs.

Next.js · Supabase · LiveKit · PyTorch · Transformers · TRL · PEFT

Stack

Languages
TypeScript, Python, SQL
Product
Next.js, React, Flutter
Backend
FastAPI, PostgreSQL, Supabase, Docker, GCP, Vercel
AI & voice
PyTorch, Transformers, TRL, PEFT, RAG, LiveKit, ElevenLabs, Vapi, Retell
Data
Pandas, NumPy, econometrics, options analytics
Spoken
Turkish, English, some Finnish

Education

2023 — 2026 Aalto University BSc Economics, Data Science minor