Rewiring Payments Infrastructure from the Inside Out: Women Leaders Creating a New Standard in Payments

Guest Editorial by Kardelen Hatun, VP of Engineering, and Sharon Ehigiene, Strategic Programs Lead at Silverflow

International Women’s Day often brings attention to representation in leadership. In fintech, representation alone does not alter how infrastructure is built or how risk is managed. Payments systems are shaped by commercial trade-offs, engineering discipline and intricate relationships with global card schemes. Real influence in this environment comes from aligning those forces and translating strategy into systems that can operate reliably at scale.

Kardelen Hatun

At Silverflow, that alignment is structural rather than symbolic. Kardelen Hatun, VP of Engineering, leads the technical architecture underpinning the platform, shaping decisions that determine how data flows, how systems scale and how resilience is maintained. Sharon Ehigiene, Strategic Programs Lead, contributes deep card scheme expertise developed through roles at organisations such as Worldpay, bringing an understanding of governance, compliance and partner alignment that is essential in modern acquiring.

Together, they represent two perspectives that are often siloed across the industry. Engineering teams focus on stability and performance, while scheme specialists focus on regulatory adherence and network integrity. Payments infrastructure succeeds when these perspectives are not competing priorities but integrated disciplines.

Sharon Ehigiene

Modern infrastructure is no longer a black box processor moving transactions from point A to point B. It is a data-intensive, API-driven backbone that must support global merchants operating across regions, currencies and regulatory regimes. It must deliver transparency into authorisation rates, decline codes and routing logic while maintaining strict compliance with scheme mandates. The challenge is not simply supporting today’s transaction volumes; it is architecting for tomorrow’s complexity.

From a strategic standpoint, modern merchants increasingly view payments as a core operational lever. Authorisation uplift, data visibility and flexibility in acquiring relationships are no longer marginal improvements; they directly influence revenue and customer experience. For payment platforms, the challenge is identifying friction embedded in legacy models and ensuring that infrastructure design removes structural inefficiencies rather than adding superficial enhancements.

Engineering then determines whether that ambition is feasible. Kardelen’s team works with a cloud-native, card-network-integrated model designed to remove layers that traditionally sat between acquirers and schemes. By connecting more directly into the network, the platform gains access to richer data and greater control over transaction flows.

But this architectural choice also demands rigorous engineering discipline. Observability, automated testing and fault tolerance are not optional features. When infrastructure underpins billions in transaction value, small oversights become visible immediately in declined payments and merchant dissatisfaction.

Sharon’s scheme-facing perspective ensures that innovation remains grounded in network realities. Card schemes operate within strict frameworks governing security standards, reporting obligations and operational processes. Innovation that ignores those constraints creates risk rather than advantage. Bridging product ambition with scheme compliance is often the difference between sustainable growth and regulatory friction.

Experience across issuing, acquiring and scheme management provides the context needed to navigate that balance effectively. When engineering depth and scheme expertise operate in concert, infrastructure becomes both adaptable and stable. It can respond to regulatory change, new authentication standards or shifts in consumer behaviour without requiring wholesale rewrites.

That balance between flexibility and control defines what future-ready payments systems look like in practice.

Scaling Across Markets and Across Functions

Global expansion in payments is frequently described as geographic rollout. In reality, it is a multiplication of variables. Each new market introduces local acquiring nuances, regulatory expectations and issuer behaviours. Add issuing capabilities alongside acceptance, and operational complexity expands further.

For merchants scaling internationally, authorisation performance is often the first metric under scrutiny. Yet behind every incremental improvement sits a web of routing decisions, local scheme rules and risk models. Expansion plans must be matched with infrastructure capable of handling local message formats, settlement cycles and dispute management frameworks.

Engineering scalability is less about adding servers and more about designing modular systems. Platforms built for a single region frequently embed assumptions about currencies, compliance thresholds or reporting structures. When those assumptions are hard-coded, expansion becomes a series of patches. Kardelen’s approach centres on separating core processing logic from market-specific configuration. This abstraction allows new regions to be integrated without destabilising existing ones and supports continuous deployment rather than disruptive upgrades.

Operational maturity is equally critical. Monitoring systems must provide granular insight into transaction throughput, latency and issuer response patterns. Real-time data access allows teams to identify anomalies before they escalate into systemic issues. Infrastructure resilience is measured not only by uptime percentages but by the speed and precision with which problems are diagnosed and resolved.

Sharon’s engagement with scheme partners adds a strategic dimension to scaling. Card networks evolve their mandates regularly, from updates to security protocols to changes in reporting standards. Companies operating across multiple markets must anticipate these developments and adapt proactively. Maintaining active dialogue with scheme stakeholders, understanding roadmap signals and aligning internal systems ahead of deadlines reduces compliance risk and strengthens long-term partnerships.

The lesson from scaling is consistent. Growth amplifies weaknesses in design and coordination. Early architectural and organisational decisions determine whether expansion becomes a controlled evolution or a reactive cycle of remediation.

Collaboration, Mentorship and Industry Change

Infrastructure-level fintech remains male-dominated, particularly within engineering and scheme-facing roles. Shifting that landscape requires more than recruitment targets. It requires environments in which diverse expertise is not only present but decisive.

Cross-functional collaboration in payments is rarely frictionless. Commercial teams push for rapid feature delivery to meet merchant demands. Engineers prioritise system integrity and technical debt management. Scheme specialists focus on compliance and network stability. Productive tension is inevitable. The difference lies in how early those tensions surface and how transparently they are resolved.

At Silverflow, product direction is informed from the outset by commercial insight, engineering feasibility and scheme considerations. This integrated model reduces the risk of overpromising capabilities that infrastructure cannot support or pursuing technical initiatives misaligned with market needs. It also creates shared accountability. Success is measured not by isolated departmental metrics but by transaction performance, uptime and merchant satisfaction.

For senior women operating within this context, influence is demonstrated through measurable outcomes. Commercial negotiations translate into adoption and revenue growth. Architectural decisions shape system resilience and scalability. Scheme strategies determine compliance posture and partner trust. Authority in such environments is built on technical and strategic competence rather than title alone.

Mentorship also plays a role in sustaining industry progress. Payments infrastructure is complex, and expertise develops through exposure to high-stakes decision-making. Junior engineers benefit from leaders who model rigorous design principles and transparent communication about trade-offs. Emerging professionals gain experience when included in discussions that reveal the interconnected nature of payments ecosystems.

The future of payments infrastructure will demand greater real-time capability, deeper data transparency and tighter regulatory alignment. Technologies such as machine learning will support fraud detection and optimisation, but the core architectural decisions will remain human. They will rely on judgement about resilience, openness and long-term sustainability.

The impact of women in fintech therefore extends beyond representation metrics. It is visible in the architectural choices that determine scalability, the partnership strategies that shape compliance and the mentorship that develops the next generation of leaders. In a sector defined by precision, scale and accountability, that impact is tangible. It shapes how global commerce moves and how resilient the systems beneath it will be in the years ahead.

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Kardelen Hatun is VP of Engineering at Silverflow, leading the company’s next-generation payments platform with a focus on scalability, resilience, and operational excellence. With over a decade of hands-on engineering experience, including a PhD in Computer Software Engineering, Kardelen has guided high-scale e-commerce and payments systems in senior technical and leadership roles. Prior to Silverflow, she worked at Bol.com and Nedap, building mission-critical backend systems and modernizing legacy platforms. At Silverflow, Kardelen is known for combining deep technical expertise with people-first leadership, aligning engineering and product teams around a shared vision while fostering empowered, high-performing teams.

Sharon Ehigiene is Strategic Programs Lead at Silverflow, bringing extensive experience across payments, card schemes, and payment infrastructure. She holds a bachelor’s degree in International Business Administration and a master’s in Management in Innovation from RSM Erasmus University, and has completed executive fintech studies at the University of Oxford. Sharon began her career at Underwriters Laboratories (UL) before joining Adyen, where she managed local payment methods and later served as Program Manager Issuing, contributing to the development of Adyen’s issuing product and card programs. She later joined Primer as a Product Manager focused on payments orchestration and commerce automation. At Silverflow, Sharon focuses on strengthening the company’s product proposition, building strategic relationships with card schemes, and supporting regional growth and client onboarding.