Marcin Tandecki
Product Manager
Data-driven PM with a technical background and a focus on user behaviour.
Product Manager with extensive experience across product, design, UX, and front-end development. I combine a data-led mindset with a user-behavior driven approach to product decisions, using metrics, experimentation, and real usage to drive meaningful outcomes.
I am a collaborative, hands-on partner to designers, engineers, and stakeholders, often acting as a technical liaison who helps teams align quickly and move with confidence. Known as a clear communicator and strong team player, I bring people together around shared goals and help turn cross-functional groups into high-performing product teams.
Core Competencies
- Data-Driven Product Decisions Using Real User Behavior
- Technical Product Strategy
- Experimentation, A/B Testing & Outcome Measurement
- SaaS & Marketplace Products
- Funnel, Conversion, Retention & Adoption Optimization
- Data-Led Stakeholder Alignment
- Customer Journey Mapping Across Complex SaaS Workflows
- Prototyping & UX Partnership
Professional Experience
IT Networked Systems
Apr 2018 - Current
Product Manager, Front-End Developer, and Designer (Consultant)
- Partnered with clients to define business objectives, customer needs, and success metrics, translating insights into actionable product strategies.
- Reviewed site performance metrics and produced monthly performance reports outlining usage statistics and key site metrics, providing clients with clear visibility into performance trends and overall site health.
- Collaborated with design and engineering to prototype, validate, and deliver product improvements.
- Helped shift from opinion-based requests to outcome-focused decision making through evidence and data.
Mobials / AutoVerify
Sept 2020 - Jun 2024
Product Manager (SaaS)
- AutoVerify Research Suite (AVR)
- Owned and evolved the end-to-end customer experience for the AutoVerify Research Suite, for 1000+ active dealer clients and their downstream consumer shoppers in a B2B2C marketplace.
- Built automated reporting to track product usage, customer adoption, retention, and overall product health.
- Partnered with Customer Satisfaction to analyze churn drivers, identifying key loss reasons and translating insights into a strategy that recovered previously churned customers and grew the client base by 6% in 1 quarter.
- Collaborated with the integrations team to streamline dealer site implementations, increasing product customization to better match existing dealer websites, and reducing integration time by ~25%.
- Led product delivery on a bi-weekly sprint cadence, shipping bug fixes every release, minor enhancements every 2-3 sprints, and at least 1 major feature or product per quarter.
- Blue Auto
- Owned lead quality, activation, and conversion performance, focusing on revenue rather than vanity metrics.
- Used behavioral data and funnel analysis to identify experience gaps and prioritize growth initiatives.
- Partnered with design, engineering, sales, and leadership to align product decisions with real-world usage.
- Improved customer ROI by implementing lead filtering strategies that reduced low-quality volume.
- Increased vehicle purchase conversion rates by over 300% in less than 1 year.
Freelance
Jun 2017 - Sep 2020
Head of Product | Salsa AI
- Partnered with the CEO and board to define the vision and strategy for an early-stage AI startup, bridging business goals and technical execution through precise problem definition.
- Spearheaded a consumer AI product, making complex data analytics accessible to non-technical users, utilizing intuitive UX to lower the barrier for sophisticated technical tools.
- Created user personas and segments based on behavioral data to drive positioning and prioritization, ensuring the roadmap addressed validated user needs rather than assumptions.
Senior Front-End Developer | Spin Master
- Transformed print-based Annual Financial Reports into a dynamic web experience, ensuring all corporate financial data remained highly accessible and informative.
- Integrated complex animations, videos, and interactive elements to deliver an engaging user experience that aligned with the toy brand's fun and playful identity.
- Executed the technical strategy for interactive components, ensuring the interface balanced deep financial transparency with an immersive, brand-aligned user journey.
Cerebri AI
May 2016 - Apr 2018
Senior UI Developer / Product Manager
- Designed and evolved intuitive interfaces to help users understand and act on complex data sets.
- Improved usability and product clarity through continuous iteration informed by user behavior and feedback.
- Worked closely with product and engineering teams to balance functional depth with ease of use.
Marcin Tandecki (page 2 of 2)
Employment History (continued)
Kijiji Canada / eBay
Jul 2012 - Apr 2016
Product Developer
- Contributed to product initiatives on a large-scale consumer marketplace serving ~20M unique monthly visitors.
- Partnered cross-functionally with Engineering, UX, Design, and Revenue teams to deliver product improvements.
- Evaluated new product features using behavioral data, analytics, and direct user feedback.
- Reduced delivery risk by designing and building high-fidelity prototypes to test assumptions and feasibility before the involvement of the tech teams.
- Facilitated usability testing, moderation, observation, and synthesis into clear product recommendations.
- Participated in market research focus groups analyzing user behavior and market sentiment toward Kijiji's position in the used automotive market.
Senior Front-End Developer
- Designed and engineered an award-winning front-end framework (HTML/CSS/JS) that standardized UI consistency and brand guidelines across the organization, significantly increasing development velocity, and scalability.
- Led a comprehensive UI rebuild during the high-stakes migration from a shared global platform to a custom-built solution, ensuring total architectural autonomy while maintaining brand integrity for millions of users.
- Directed technical hiring and onboarding post-migration, scaling the team to support the new architecture while mentoring developers on code quality and UI framework implementation.
Trapeze Media
May 2011 - Jul 2012
Lead Front-End Developer
- Mitsubishi Motors Canada
- Managed large-scale web builds and monthly updates for Mitsubishi Motors, ensuring strict adherence to global corporate brand standards and technical requirements.
- Navigated complex technical constraints by maintaining full compatibility across legacy browsers while delivering a modern, high-performance user experience.
- Coordinated with cross-functional teams to execute a consistent digital strategy that supported high-traffic automotive marketing campaigns and lead generation.
- Royal LePage Commercial
- Designed and developed a custom map-based lookup utility for commercial property listings, simplifying complex geographic data for a better search experience.
- Leveraged the Google Maps API and advanced plugins to build a high-utility interface that allowed users to visualize and filter properties with precision.
- Optimized the front-end architecture to handle large datasets of commercial listings, ensuring fast load times and an intuitive interface for professionals.
Digital Cement / Pitney Bowes
Jul 2007 - May 2011
Intermediate / Senior Front-End Developer
- John Hancock - Coach's Corner
- Lead the front-end team in the development of a feature-rich website.
- Maintained strict cross-browser compatibility, including legacy browsers.
- General Mills
- Created pages based on Photoshop designs using jQuery, XHTML, and CSS.
- Migrated content to Sitecore CMS, rebuilding pages and templates using XSLT.
- Converted all flash content into HTML/CSS/JavaScript to make the website more mobile and SEO friendly.
- Kraft Canada / US / Australia
- Populated and maintained content in Microsoft CMS, and trained new staff on these processes.
- Built weekly emails adhering to strict QA guidelines, reaching up to 1 million users/week.
Smart Web Pros
UI Design and Development
- Led client conversations establishing requirements of the objectives from a front-end point of view.
- Provided guidance on best practices and web standards during the design phase.
- Designed and developed websites for clients, satisfying business and design requirements.
Graphic Design
- Designed graphics for digital display as well as print and advertising. Some of the designed material included: flyers, stationary material, billboards, magazine ads, Yellow Pages ads, brochures etc.
Education
Skillset
Product Management
- UX Research
- Prototyping
- A/B Testing
- Usability Testing
- Product Lifecycle
- Product Strategy
- Personas
Methodologies
- Agile
- Dual-Track Agile
- Scrum
- Lean
- Kanban
- Waterfall
Web Development
- CSS3
- LESS/SASS
- PHP
- HTML5
- APIs
- JavaScript
- Git
- React
- SEO
- MySQL
- UX/UI Design
- Responsive Web Design
Software
- MS Office
- G Suite
- JIRA
- Confluence
- Photoshop
- Figma/Canva
- FigJam/Miro
Interests
- Photography
- Cryptocurrency
- Blockchain
- Finance
- Psychology
- Music
- Travel
