Jacek Mariański
AI Solutions Engineer
More than ten years of building software across enterprises, startups and independent projects—from .NET and Java systems to AI tools, publishing infrastructure and rapid product prototypes.
Core skills
Technologies and areas I work with regularly
Languages & frameworks
Frontend
Backend & tools
DevOps & data
AI & emerging tech
Highlighted projects
Different parts of my work in production
Platform continuity during a critical team transition, Next.js migration, visual redesign and expansion into Spanish, Italian and French markets with PolyTrans.
Impact: Three additional language markets, platform modernization and continued work across the Trans.eu ecosystem.
A microservice architecture coordinating freelancers and AI models to create high-quality subtitles for television series at scale.
Impact: A complete .NET, Vue, Next.js, Nest.js and RabbitMQ workflow.
Upgrade of an enterprise Confluence plugin to version 2.0 with performance and scalability work for Data Center deployments.
Impact: Java and Spring plugin modernization for enterprise use.
Technical leadership of a complete e-commerce rebuild from a legacy codebase, including internal-system integrations and warranty support.
Impact: Architecture, implementation and client-facing delivery.
Experience timeline
A path through different industries and technology stacks
Building AI-powered tools, agent infrastructure and rapid prototypes around LLMs, automation and developer experience.
Multilingual publishing, WordPress properties, Next.js modernization, analytics, advertising and continued technology work across the logistics ecosystem.
Enterprise and agency projects across .NET, Java, PHP, Symfony, Vue, Next.js, Nest.js and RabbitMQ for international clients.
E-commerce, real-time streaming tools, WordPress and Laravel projects, including technical implementation and client relationships.
Internal reporting tools for a Norwegian accounting platform, built with PHP and Zend Framework.
Master of Engineering, specializing in internet and mobile technologies.