Mark Pietrusinski
Techical Founder at Stealth Mode
Greater Málaga Metropolitan Area Spain
Summary
👤
Senior🎓
Top SchoolMark Pietrusinski is a technical founder and full-stack web developer with 11 years of professional experience building scalable e-commerce, transport SaaS, and fintech systems, now focused on multi-modal AI-driven mobile experiences. He combines hands-on expertise across TypeScript, Golang, PHP, Python and C#, deep database tuning (MySQL/Postgres), and cloud automation on AWS/GCP with CI/CD, containerisation and observability toolchains. At Sqills he helped grow a small team into a global SaaS leader, owning SPAs, high-availability backends, automated testing and performance optimisation; today he’s shipping a production React Native app that streams text, image and voice with custom agent workflows and RAG pipelines. Fluent in five languages and experienced working across Europe and remotely, he blends practical product delivery with prompt engineering and cost-optimised model integrations. Not obvious from titles: his background in chemical engineering and process simulation underpins a methodical, measurement-driven approach to system design and optimisation.
11 years of coding experience
20 years of employment as a software developer
Bachelor of Applied Science Chemical Engineering, Bachelor of Applied Science Chemical Engineering at The University of British Columbia
English, Spanish, French, Dutch, Polish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (45)
starter-kit10
php10
nodejs10
boilerplate10
ejs10
ecommerce9
payum9
ecommerce-application9
magento9
adobe9
data-export7
affiliates7
gateway6
symfony6
csv-import6
Programming languages (4)
Github contributions (5)
sqills/payum-icepay
Nov 2016 - Nov 2019
Icepay gateway for Payum
Contributions:9 releases, 6 PRs, 19 pushes in 3 years 1 month
icepaypayumgateway
markpol/5e-database
Mar 2022 - Feb 2025
Database for the D&D 5th Edition API
Contributions:7 PRs, 36 pushes, 6 branches in 2 years 11 months
5th-editionapidatabase
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