01 / MOBILE APPiOS
TrainSense.
TrainSense: fitness coaching for iOS
A fitness coaching app I built for iOS, from its SwiftUI interface to subscriptions and supporting services. Built with StoreKit 2, Firebase, SwiftData, and Sentry.
SOFTWARE ENGINEER & INDEPENDENT BUILDER
Can Önal.
Software engineer
in Amsterdam.
A curious mind. A builder’s instinct.
I’m Can, a software engineer based in Amsterdam.
I build payment systems at Picnic and turn ideas
into apps in my own time.
BACKEND ENGINEERING / PRODUCT BUILDING / APPLIED AISCROLL TO EXPLORE
Selected work / 01
A few things I’ve built.02 / COLLABORATIVE MUSICWeb
vybe.
Vybe: collaborative music
Scan a QR code, search for songs, and vote to shape a live queue. I contributed full-stack development with my Bilkent senior project team. The project received the Best Marketability Award.
Full-stack development
LLM-generated Rego policies
My MSc research explores generating Rego policies for Open Policy Agent with large language models, connecting natural-language requirements to executable authorization policies.
IEEE SANER-C 2026 · Read the paperTHE PERSON BEHIND THE CODE / 02
Curiosity is
the common thread.
I enjoy understanding how things work, then building something useful with that knowledge.
My background connects computer science with data science and entrepreneurship. Today, I’m focused on reliable backend systems, while independent projects keep me close to the whole product.
Away from the keyboard: guitar, a good book, and finding somewhere new to explore.
JavaSpringKafkaPostgreSQLAWSSwiftUI
The path so far / 03
Work & educationNOWAmsterdam, NL
Picnic Technologies
Java Developer · Payments
PREVIOUSLYTürkiye
Yapı Kredi
Part-time Java Developer
EDUCATIONNetherlands
JADS · TU/e & Tilburg University
MSc Data Science in Business & Entrepreneurship
EDUCATIONAnkara, Türkiye
Bilkent University
BSc Computer Science
GET IN TOUCH / 04