Ersin Ozan Öneyman
@ersinozanneyman
I build mobile and AI-enabled applications, from offline-first finance products to LLM conversation flows.
TurkeyWhat I'm looking for
I built Budget Reflector, an offline-first personal finance app that brings income and expense tracking, budgeting, credit card and account management, and savings into one Flutter product.
For iOS, I integrated receipt OCR with Vision and MethodChannel, RevenueCat subscriptions and paywall functionality, and rule-based reminders through Flutter Local Notifications. I also built Firebase Cloud Functions to sync foreign exchange and gold prices from external APIs while supporting encryption and quality assurance for sensitive financial data.
At Halkbank, I designed Cbot conversation flows, supported LLM use cases, improved prompts and response quality, and created test scenarios. I also gained experience with Swift/iOS development processes, build and testing workflows, code reviews, and small improvements to existing mobile screens.
Experience
Work history, roles, and key accomplishments
Head of AI Applications Department, Summer Internship
Halkbank
Jun 2025 - Aug 2025 (2 months)
Designed conversation flows for various scenarios on Cbot and supported LLM-based use cases and environment setup activities. Created test scenarios to validate flows and responses, and contributed to prompt design and response quality improvements.
Head of Mobile Application Development Department, Summer Internship
Halkbank
Jun 2024 - Aug 2024 (2 months)
Gained hands-on experience by observing iOS development processes, including the Swift/iOS ecosystem, architecture, and team workflows. Supported the team in development environment setup, build, and testing processes, and assisted with small improvements and fixes on existing screens and flows.
Education
Degrees, certifications, and relevant coursework
Istanbul Atlas University
Bachelor's Degree, Software Engineering
2022 -
Pursuing a Bachelor's degree in Software Engineering, expected to graduate in 2026.
Fen Bilimleri Anatolian High School
High School Diploma, General Education
2018 - 2022
Completed high school education at Fen Bilimleri Anatolian High School.
Availability
Location
TurkeyAuthorized to work in
Website
ozanoneyman.comPortfolio
budgetreflector.comSalary expectations
Social media
Job categories
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