Kardelen Hatun, VP of Engineering, and Sharon Ehigiene, Strategic Programs Lead at Silverflow reflect on the importance of International Women’s Day.
Ahead of International Women’s Day, conversations across fintech will once again focus on representation. But representation alone does not build payment systems, expand into new markets, or navigate the complexity of global card networks. Impact does. And impact in payments comes from the alignment of commercial judgement, technical precision and deep scheme expertise.
At Silverflow, that alignment is embedded in the day-to-day collaboration between engineering and strategic programs leadership. Kardelen Hatun, VP of Engineering, and Sharon Ehigiene, Strategic Programs Lead, bring complementary expertise spanning platform architecture, payment infrastructure and card scheme strategy.
Their shared perspective offers a practical view of how global payments systems are actually built – and what it takes to make them future-ready.
As payment companies scale globally, they often encounter limitations in systems not originally designed to accommodate regulatory diversity, local payment nuances or scheme-specific requirements.
Sustainable growth in payments depends on aligning commercial ambition with operational feasibility. Winning new clients or expanding into new regions requires infrastructure capable of handling increasing complexity without compromising stability.
Strong infrastructure begins with clarity. Teams must anticipate not only what clients require today, but what they will need as transaction volumes grow and use cases diversify. Whether supporting marketplace models, embedded finance propositions or global merchants operating across acceptance and issuing, the system must be designed with adaptability in mind.
Kardelen Hatun translates that commercial foresight into engineering discipline. With a background in high-scale e-commerce systems and a PhD in computer software engineering, she views payments infrastructure as critical national infrastructure in digital form. Downtime is not an inconvenience; it is a systemic risk.
Under her leadership, engineering decisions are anchored in resilience, observability and scalability. Architectural choices are made with future volume growth in mind, but also with an understanding that regulatory and scheme requirements evolve continuously. Technical debt, if left unchecked, compounds rapidly in payments. The solution is deliberate design, robust testing and cross-functional alignment from the outset.
By aligning engineering development with commercial strategy early in the process, organisations can avoid the costly cycle of retrofitting infrastructure after rapid growth.
Sharon Ehigiene brings a third dimension that is often underestimated outside the industry: card scheme expertise. As Strategic Programs Lead, she operates at the intersection of network rules, compliance frameworks and product innovation.
Card schemes are not static utilities. They evolve continuously, introducing new mandates, security standards, data requirements and processing capabilities. For companies building directly into the networks, understanding these dynamics is not optional.
Ehigiene’s role ensures that scheme developments are not treated as external constraints but as strategic inputs. Whether navigating new authentication requirements, aligning with network tokenisation strategies, or supporting innovative issuing and acceptance models, early engagement with schemes reduces friction and accelerates go-to-market timelines.
Her experience highlights a core lesson: scaling payments is not only about technology or client acquisition. It is about orchestration. Issuers, acquirers, schemes, regulators and merchants all operate within interconnected frameworks. Misalignment in one area can ripple across the entire ecosystem.
By embedding scheme knowledge directly into product and engineering conversations, Silverflow narrows the gap between evolving scheme playbooks and technical implementation. Engineering teams are briefed not just on what must be built, but why specific scheme changes matter. Commercial teams are equipped to advise clients realistically about timelines and compliance implications.
This integration of scheme insight with business and engineering strategy creates leverage. Rather than reacting to network mandates, the organisation can anticipate them and design proactively.
Fintech has long been described as male-dominated, particularly at senior technical and commercial levels. But the experience of Hatun and Ehigiene demonstrates that innovation in payments is not driven by hierarchy or visibility. It is driven by disciplined collaboration.
Cross-functional alignment is not a slogan within their leadership approach; it is operationalised. Engineering roadmaps are shaped by real market constraints. Business strategy is informed by architectural trade-offs. Scheme partnerships are woven into both.
Hatun emphasises that technical excellence depends on empowered teams. Engineering happiness, in her words, is not a soft metric. When engineers understand the commercial context of their work and have direct access to scheme and regulatory insight, they build with greater confidence and precision.
Ehigiene adds that sustainable innovation requires trust – internally and externally. Scheme partners must see a commitment to compliance and stability. Clients must trust that the infrastructure underpinning their revenue flows can withstand scheme compliance, regulatory change and traffic spikes alike.
Their collaboration challenges the idea that leadership in fintech is defined by singular visionaries. Instead, it reflects a model in which expertise across domains is respected and synthesised. In a sector where speed often dominates headlines, their approach underscores the value of thoughtful, structured progress.
Impact in fintech is not limited to platform performance or market share. It is also measured by the strength of the talent pipeline.
Both leaders actively mentor emerging professionals across engineering, product and payments strategy disciplines. Their approach emphasises knowledge sharing and a deep understanding of the broader payments ecosystem.
Payments remains a complex industry shaped by regulatory frameworks, evolving card scheme rules and sophisticated technical infrastructure. Institutional knowledge cannot be improvised; it must be learned, shared and continuously refined.
Ahead of International Women’s Day, this perspective reframes the conversation around representation. Increasing diversity in fintech leadership matters, but lasting industry change depends on expertise, collaboration and the discipline required to build resilient infrastructure capable of supporting global commerce.
At Silverflow, engineering architecture and scheme partnerships are not separate tracks. They operate as interconnected systems that together create payments infrastructure that is scalable, resilient and future-ready.
Leadership, in this context, is not symbolic. It is about building systems capable of moving trillions of transactions securely while supporting the next generation of industry experts
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