Joni Hasanen
Senior Specialist, Infosec at Piece Of Code tmi
Helsinki, Finland
Summary
👤
Senior🎓
Top SchoolJoni Hasanen is a seasoned application security specialist and full‑stack developer with 12 years of experience, now focused on infosec at OP Financial Group after transitioning from hands‑on development and consulting roles in 2023. He brings deep practical knowledge across backend, frontend and embedded systems using JavaScript, Python, Ruby and MicroPython, and has founded multiple ventures including a consulting firm and a product-focused company. As a former R&D team lead and co‑founder, he balances strategic direction with day‑to‑day technical execution and a pragmatic view that security must serve business goals. Known for fast learning and clear communication, he thrives in cross‑functional, technically challenging environments and contributes to the security community through volunteer work with Disobey and local groups. A hobbyist hardware hacker, he often applies embedded systems insights to application security problems, giving him an unusual edge when assessing end‑to‑end risk.
12 years of coding experience
14 years of employment as a software developer
Information Technology, Information Technology at Helsinki Business College Oy
English, Finnish
Stackoverflow
23reputation
1kreached
1answer
4questions
Github Skills (133)
payment-integration9
payment9
payment-gateway9
ansible-role9
payment-processing9
rvm9
square9
adyen9
spree8
flask8
authentication8
abstraction8
tty-components8
identity8
xml8
Programming languages (11)
Github contributions (5)
hasanen/dotfiles
Sep 2017 - Sep 2024
Contributions:69 pushes in 7 years 1 month
hasanen/my-hours
Sep 2021 - Mar 2023
SImple CLI tool for checking current month's hours from Toggl
Contributions:104 commits, 136 PRs, 196 pushes in 1 year 6 months
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