By: Jeremy C.

Yaroslava Mazepina is a product and quality leader shaping fintech infrastructure at scale, mentoring thousands across two continents, and now launching an AI-powered platform to transform influencer marketing.

She grew up in Donetsk, Ukraine. From an early age, she was captivated by numbers, logic, and the challenge of solving problems others avoided.

“I was always curious,” she recalls. “Even at school, I couldn’t let go of a question until I understood it deeply. That curiosity — and perfectionism — became the foundation of everything I do today.”

By the time she finished school, Mazepina had won the prestigious Pythagorean Steps math competition and earned a place at Donetsk National University’s mathematics faculty. There, she studied applied mathematics, proved theorems, mastered programming languages, and graduated with honors. Along the way, she experimented with marketing jobs and even worked as a mystery shopper — unknowingly laying the foundation for her future in quality assurance.

Finding Her Cup of Tea: The QA Discovery

When Mazepina graduated in 2013, Ukraine’s tech ecosystem was still in its infancy. She knew she didn’t want to be a developer, but her mix of analytical skills and attention to detail naturally steered her toward quality assurance.

Her first role as a QA engineer was a revelation: “Within a month, I knew this was my cup of tea,” she says. “I realized I could combine my love for detail with my drive to improve things — not just for the product, but for the customer.”

In her early years, she cut her teeth at Cleveroad on social, fintech, and geolocation projects. At Geozilla, a family locator app with more than 10 million users, she boosted app ratings and customer satisfaction by building a robust testing strategy.

In 2016, she joined one of the Big Four firms. Over the next five years, she focused on automation for a fintech product used in real time by 460,000+ customers. Her expertise and innovative approach accelerated release cycles by 30% across multiple domains. Reflecting on this, she says:

“Usually, when you test a fintech product, you rely mostly on a technical approach. I shifted the focus to the end customer experience. The practical insights I gained, especially learning how to align high-quality processes with real business needs, were a game-changer in my career”. In 2018, she began sharing these insights on Instagram. What started as a side project quickly grew into a blog @columbovna with an audience of 49,000 followers, making her one of Ukraine’s most followed QA influencers at the time.

Scaling Quality for Millions

In 2021, Mazepina joined a leading social trading platform with 37M+ users across 75 countries. She stepped into one of the complex arenas in fintech: tax reporting, compliance, and regulatory infrastructure. What most companies see as a cost center, she saw as an opportunity to create trust, increase efficiency, and gain a competitive advantage.

One of Mazepina’s significant achievements as Product Quality Manager was delivering the company’s successful tax season to date by rebuilding the tax stack end-to-end — compressing report generation from 7 days to 2 hours. The business impact was immediate and customer-visible: clients in 20 supported countries received their tax reports 1–3 months earlier than in prior years, giving them time to review, reconcile, and file without the last-minute rush.

This change drove 46% growth in product usage and a 73% reduction in support costs. For Mazepina, these weren’t just process improvements – they were about trust. “Quality means that customers can rely on you,” she says. “It’s not abstract. It’s the difference between panic in late October and peace of mind in early July.”

She also solved a multi-year compliance issue that had locked 67,000+ users — whose portfolios were worth more than $20M in total — out of tax reports. This breakthrough unlocked access, boosted loyalty, but more importantly, demonstrated how a customer-centric approach to quality assurance can drive adoption, unlock efficiency, and deliver meaningful cost savings in a competitive market.

Pairfect: Redefining Influencer Marketing with AI

The curiosity that drove Mazepina through her career led her to the Entrepreneurship Program at University College London (UCL) in 2023 and the Innovation, Technology, and Entrepreneurship Bootcamp at Oxford University in early 2025. These experiences gave her the structure and confidence to open a new chapter as the founder of Pairfect, an AI-powered platform designed to bring order to influencer marketing.

The idea was born from her lived experience as an influencer. Over the years, she collaborated with hundreds of brands. She saw the same problems repeat: random influencer selection, unclear briefs, endless negotiations, long feedback loops, and a lack of trust in results.

“Brands didn’t know how to find the right influencers who matched their mission and vision,” she recalls. “And most influencers can’t tell if a partnership will be relevant or just noise. As a result, small businesses waste time and money on campaigns that don’t bring results, while influencers risk losing audience trust by promoting irrelevant products.”

Instead of accepting the inefficiency, Mazepina applied her QA and product mindset: analyze the root causes, redesign the process, and build a system that ensures quality. Without guesswork, wasted campaigns, and poor measurement after launch.

For brands, it means faster, smarter access to audiences that convert. For creators, it means partnerships that resonate with their communities.  “We’re building Pairfect to be the quality layer for the entire ecosystem — where both brands and creators can finally trust the process,” she says. 

In 2025, Mazepina was named a finalist in the Women in STEM category at the Women’s Business Awards. However, for her, recognition is not the ultimate goal. It is a platform. “What matters most is that customers feel delighted and supported. That’s impossible to achieve without quality. After 12 years in tech, I know quality isn’t just about products – it’s about building trust. My mission is to keep shaping products where quality drives trust and sustainable growth,” she reflects. “And  when trust scales, it doesn’t just transform companies—it transforms entire industries.”

Disclaimer: This article is for informational purposes only and does not constitute financial, business, or legal advice. All views and experiences shared are attributed to Yaroslava Mazepina. References to companies, products, or achievements are based on publicly available information and personal accounts at the time of writing. Neither the author nor the publisher guarantees the accuracy, completeness, or future outcomes related to the initiatives or platforms mentioned, including Pairfect. Readers should conduct their own research before making business, financial, or partnership decisions.