Nikita Chumak

UX Researcher  • 📍Warsaw, Poland

Senior UX Researcher with 8+ years of experience driving product insights across tech, fintech, and UGC platforms. Expert in qualitative and quantitative research, ResearchOps, and user-centered design, with a proven track record of improving conversion, engagement, and usability metrics. Built UX Research functions from scratch at Yandex Ads and Pikabu, introducing processes, tooling, and frameworks that accelerated discovery and validation cycles by up to 6x. Skilled in mentoring teams, scaling research literacy, and translating behavioral data into actionable product decisions that deliver measurable business impact.

CV (PDF)   •  LinkedIn↗  •  nikita@chumak.io

Case Studies

CASE #1

Democratizing UX Research: From Bottlenecks to Speed Dating

👤 My role: ResearchOps
🏢 Company: Yandex Ads
📈 Key result: Slashed research time from 7 days to 1 day while scaling research capabilities
🏷️ Tags: #ResearchOps, #DemocratizingResearch

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CASE #2

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Perception vs. Reality: Unmasking Algorithmic Change Resistance

👤 My role: Senior UX Researcher
🏢 Company: Pikabu — a UGC platform
📈 Key result: Enabling confident product decisions despite vocal opposition
🏷️ Tags: #ControlledExperiment, #QuantitativeResearch, #SurveyDesign, #DataDrivenDecisions, #CognitiveEffects

CASE #3

Increased Registration Conversion by 45% with Usability Testing

👤 My role: Senior UX Researcher
🏢 Company: Pikabu — a UGC platform
📈 Key result: 45% increase in registration conversion rate
🏷️ Tags: #UsabilityTesting, #Registration, #UserOnboarding, #FormDesign, #ErrorHandling

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CASE #4

Banking on Better UX: Transforming Self-Service from Pain Point to Preference

👤 My role: UX Research Lead
🏢 Company: MTS Bank
📈 Key result: Increased transactional Net Promoter Score (tNPS) from -3 to 45
🏷️ Tags: #NPS #FinTech #UsabilityTesting #CustomerJourney #MixedMethodsResearch #DataAnalysis

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FAQs

Skills, Education, Tools, Certifications
  • Languages: 🇺🇸 English C1, 🇷🇺 Russian native, 🇺🇦 Ukrainian B2
  • User Experience: Communication, Qualitative research, Usability testing, In-depth user interview, Heuristic Evaluation, Quantitative research, Survey Design, UX Design Principles, UX Measuring, HCI & UCD, Design Thinking, Data Analysis, Statistical Analysis
  • Education: BA Social Psychology, UNECON↗, Saint-Petersburg, Russia, 2012-2016
  • Tools: Maze, Figma, MySQL, RStudio, Excel (Advanced), Google Analytics, Alchemer, Axure
  • Certifications:

For detailed information about my work experience, you can check my LinkedIn↗ or view my CV. Both contain comprehensive information about my career progression and achievements.

I specialize in UX research and user behavior analysis to enhance digital experience. Send me your project details via email nikita@chumak.io, and I’ll let you know if I can help.