Oscar Tark
Founder at Cleanerei
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolOscar Tark is a Berlin-based founder and full-stack software engineer with a decade of experience building web and fintech products, from clean-tech service platforms to multi-currency banking solutions. He combines hands-on development (PHP, JavaScript, MySQL, Python, MongoDB) with product leadership and company operational skills—having founded Cleanerei, led product at B2B Pay, and co-founded Codekrane for Big Data and FinTech work. Oscar has practical ERP and health-tech experience with Tryton/GNU Health, plus frontline CTO experience training teams on Ionic/Angular. He emphasizes ethical and sustainable business models, evidenced by ventures like Cleanerei and the Prana platform for the homeless. Comfortable switching between code, infrastructure, and legal/HR responsibilities, he often ships end-to-end features such as payment and mapping integrations (Stripe, HERE) himself. A developer with entrepreneurial grit, he blends civic-minded projects and experimental creative ventures, signaling a rare mix of technical depth and social purpose.
10 years of coding experience
7 years of employment as a software developer
International Baccalaureate (IB) PYP and MYP, B+, International Baccalaureate (IB) PYP and MYP, B+ at American Overseas School of Rome (AOSR)International Baccalaureate (IB) Diploma Programme, Physics, Economics, Business & Managment, C (75.3%), International Baccalaureate (IB) Diploma Programme, Physics, Economics, Business & Managment, C (75.3%) at SBS High School
English, Italian, Hindi, German
Github Skills (12)
server6
database6
mysql5
java5
sandbox5
javascript4
nextjs4
nodejs4
react4
executor4
squirrel2
metadata2
Programming languages (3)
Github contributions (5)
Oscar-Tark/Squirrel-EES
Jul 2021 - Jan 2023
Squirrel Execution Engine Server
Contributions:1 release, 59 commits, 17 PRs in 1 year 7 months
mysqlsquirrelparsing-engineframeworksandbox
Oscar-Tark/Scorpion-BITFx
Sep 2020 - Mar 2022
Contributions:9 pushes, 1 branch in 1 year 6 months
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