Dominik Śliwiński
@dominikliwiski
Software architect and PHP engineer behind Herolister.com, an eBay listing platform acquired by an Australian investor in 2025.
PolandWhat I'm looking for
I built Herolister.com, an e-commerce template generator and listing platform for eBay merchants, and served as its sole engineer across the product lifecycle. It automated listing creation, bulk updates, and real-time inventory synchronization through external APIs.
For Herolister.com, I designed custom distributed job queues, cron schedulers, rate-limiting handlers, and background workers for asynchronous processing. I also established error diagnostics and automated failure alerts, then sold the platform, codebase, and cloud infrastructure to an Australian investor in 2025.
I independently architected and maintained Promotask.com, a financial automation platform that parsed financial offers and generated tailored action lists, schedules, and deadline tracking. At GInfor.pl, I built a search system for the Poznań Automotive Exchange that connected web services with on-site touchscreen kiosks and synchronized overhead displays.
Since 2024, I’ve explored fullstack applications using Bun, TypeScript, and Svelte/SvelteKit, alongside AI-assisted engineering workflows with Cursor and Claude Code. I’m seeking a stable, long-term B2B partnership focused on building scalable, reliable systems, without the overhead of business operations.
Experience
Work history, roles, and key accomplishments
Independent Software Architect & R&D Engineer
Private R&D Projects
Jan 2024 - Present (2 years 9 months)
Mastered AI-assisted engineering environments and modern tech stacks, architected experimental fullstack applications, and orchestrated self-hosted infrastructure with secure tunnels.
Sole Founder & Solo Fullstack Developer
Promotask.com
Jan 2019 - Jan 2025 (6 years)
Architected, built, and maintained a financial promotions and automated task generation platform, including a high-performance backend parser for financial offers.
Sole Founder & Lead Systems Architect
Herolister.com
Jan 2017 - Jan 2025 (8 years)
Sole engineer across the entire product lifecycle, building an e-commerce template generator and listing platform for eBay merchants. Designed custom distributed job queues and background processing, and successfully sold the platform to an Australian investor in 2025.
Delivered deployments, configuration, and technical support for international clients, maintaining a top 5.0/5.0 rating based on verified reviews.
Sole Fullstack Developer & Hardware-Software Integrator
GInfor.pl
Feb 2015 - Jan 2017 (1 year 11 months)
Engineered a multi-tier search engine system for the Poznań Automotive Exchange, including interactive touchscreen kiosks and a synchronized dual-display engine. Built cross-platform mobile interfaces using Ionic and Angular.
Education
Degrees, certifications, and relevant coursework
Technical Education Degree
Technical Education Degree, Software Architecture
Completed technical education in Poznań, Poland, with a focus on software architecture and continuous learning.
Availability
Location
PolandAuthorized to work in
Salary expectations
Job categories
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