Patryk Śliż

S&H Patryk Śliż

Own business - a startup project delivered in a team, alongside contract work. 2023: server infrastructure and CI/CD · 2024: feedback platform for SaaS applications and an e-commerce client · 2025: note-taking app with local-first RAG, agents and automation · 2026: production RAG and an MCP server

• RAG system over a task and document base: integration with the tool API, local processing and indexing of content (Qdrant, hybrid search, semantic chunking), incremental synchronisation and access for language models through an MCP server.
• Semantic model routing gateway: a custom layer selecting model and provider, with fallback once rate limits are hit - deliberately built without an off-the-shelf framework.
• Designed and maintained small-office server and network infrastructure: virtualisation on Proxmox, routing and firewall on Mikrotik as a virtual machine, WireGuard linking 4 sites, self-hosted CI/CD on Gerrit and Jenkins.
• Long-term cooperation with an e-commerce client: a web application generating print-ready graphics files (Angular, .NET Core, PostgreSQL, SkiaSharp, Docker), deployed on the client's infrastructure with access over WireGuard.
• Startup project delivered in a team: full-stack (architecture, backend, frontend), infrastructure and deployments, plus running the project itself - sprint planning, backlog prioritisation and the release cycle. The product did not reach the market.

LOG Systems sp. z o.o.

Wrocław, fully remote · ~10-person team · enterprise software: license management and asset monitoring · path: Full-stack Developer (06.2019) → Team Leader (10.2021)

• Led a team of 3-5: sprints, estimates, code review, onboarding, mentoring, recruitment interviews, and taking on the hardest tasks.
• Owned entire modules of the system, including the whole authentication and authorisation layer - design, implementation and maintenance.
• Cut the full build and validation cycle from over an hour to a few minutes: dependency caching, replacing server drives with SSDs, removing steps that reached out to the internet on every run, and finally Yarn PnP. With a ~10-person team and many runs a day, that is tens of hours per week company-wide.
• Sole delivery of a workflow / onboarding system: Event-Sourced architecture on Marten and PostgreSQL, with modules communicating through events instead of REST. Solo full-stack - backend, frontend, architecture and deployment.
• License management and company asset monitoring system: .NET Core, CQRS/MediatR, NHibernate, Angular, with PostgreSQL and MSSQL running in parallel.

Żbik Sp. z o.o.

Rzeszów · MES systems for production floors · progression: Full-stack Developer (02.2018) → Frontend Developer (05.2018) → Frontend Team Leader (12.2018)

• Led a 3-person frontend team: frontend architecture of the MES system, repository governance, sprint planning, coding standards and communication with the PM.
• Introduced a Git workflow standard (git-flow, release cycle) and a custom design system.
• Refactored the entire frontend layer: five separate frontends replaced by one that launches modules depending on which backends are actually deployed on the application server.
• Full stack coverage within one company: Java and Spring Boot with ReactJS, then Angular 6+ with Node.js and Electron, finally frontend architecture and team leadership.

University of Information Technology and Management in Rzeszów

Part-time (evening and weekend) programme. Master's thesis: market situation analysis using machine learning - the model scores the impact of news narrative on price as a vector of relevance weights and uses it to adjust the signal from historical data and macroeconomic indicators.

Wyższa Szkoła Ekonomii i Informatyki w Krakowie (University of Economics and Computer Science, Kraków)

Part-time (evening and weekend) programme. Specialization: mobile and web application development.