Oleksii Tsesliuk
I turn complex, inconsistent products into one coherent system.
Product discovery, system analysis, and redesign strategy for B2B SaaS and data-heavy platforms.
Product discovery, system analysis, and redesign strategy for B2B SaaS and data-heavy platforms.
I come in when a product, or a group of products, has grown complex, inconsistent, or unclear, and I make it coherent again. Not as a designer hired to restyle a screen, but as the person who investigates the real problems, sets the direction, builds the process and the team, and owns it through delivery.
I investigate how the product actually behaves, find the gap between what is assumed and what is real, and reframe the problem before anyone designs a solution. Requirements analysis, system investigation, root-cause and gap analysis.
I turn fragmented products and inconsistent interfaces into one structured system, with a clear direction, a roadmap, and a prioritized backlog the team can build from.
I set up the workflow, requirements, and the activities for designers, engineers, and QA, then stay to own the product as it grows. I run the program; I don't hand it off.
I ground product decisions in user research, behavioral analytics, and system investigation rather than opinion, and I build the analytics and process a team needs to find problems and prioritize them by real impact.
In practice this means decomposing a vague request into structured work, tracing a flow to its root issue, documenting actual versus expected behavior, and turning findings into action items engineers can ship from.
I research how AI can evaluate interface quality: a retrieval-based (RAG) system that reconstructs expert UX judgement from a corpus of real, human-authored expert evaluations, grounded in Nielsen heuristics, ISO 9241, and WCAG 2.1. Recently presented at the international DPMMT-2026 conference.
Collects structured expert UX evaluations toward a model for automated heuristic interface analysis. The same direction runs through my product work, my study, and this platform.
iso9241.orgTsesliuk, O. (2024). Inclusive assessment of web interfaces for users with disabilities: approaches and modeling. State University of Trade and Economics Repository.
I'm always open to interesting problems: complex products that need to be understood, redesigned, and made coherent. If you're working on one, let's talk.
Also available for consulting, speaking engagements, and academic collaboration in systems analysis and data science: modelling expert judgement, evaluating the quality of AI output, and data-driven analysis of interfaces.
Languages: Ukrainian, native · English, B2 certified