Fintua is a global leader in indirect tax compliance and tax technology. Our all-in-one platform streamlines global VAT compliance, recovery, eInvoicing and payments, helping businesses navigate the complex indirect tax landscape with ease and confidence.

Fintua is part of CluneTech, a suite of companies providing cutting-edge solutions that simplify global business. We have been recognised as a Great Place to Work for 11 consecutive years, a Best Workplace for Women for the past 7 years and most recently, a Best Workplace in Tech for the past 6 years.

This role requires a minimum of 2 days per week in our Kilkenny office.

About the Role

We're looking for a Principal Platform Architect to own the technical vision and architectural integrity of our fintech platform — spanning both new solution design and existing systems already in production. This is a dual mandate: architect greenfield capabilities while simultaneously rationalizing and modernizing what's already built, so the platform grows as one coherent system rather than a collection of point solutions.

You'll be the primary technical authority ensuring that as we expand — new products, new markets, new acquisitions, new integrations — the platform stays unified, secure, and maintainable rather than accumulating fragmentation and technical debt.

A central focus of this role is seamless integration: making sure new and legacy solutions interoperate cleanly, share common data and identity models, and are built (or refactored) against a consistent set of architectural standards. You will also lead the strategy and implementation path toward a shared data lake / data platform, giving individual solutions across the combined platform governed, real-time access to underlying client data — eliminating duplicated data stores, inconsistent client views, and brittle point-to-point integrations between systems.

The Principal Platform Architect owns architecture strategy, standards and target-state design. Engineering Leads remain accountable for delivery execution and team management

What You'll Do

Unified platform architecture (new + existing)

Own end-to-end solution architecture across both new product initiatives and existing production systems, ensuring one coherent architectural vision rather than parallel, disconnected roadmaps

Assess existing solutions (in-house and acquired/inherited) to identify architectural debt, integration gaps, and duplicated capabilities; define and prioritise a remediation roadmap

Design new solutions to be integration-ready and debt-conscious from day one — avoiding the creation of tomorrow's legacy problems

Define target-state architecture and phased migration paths that move legacy systems toward the target state without disrupting live operations

Establish and enforce architectural guardrails — new and existing — must design against

Define and drive architectural standards for AI and agentic capabilities across model integration, observability, auditability, security, and responsible AI controls, ensuring solutions are secure, well-engineered, and consistently designed across the enterprise.

Technical debt reduction

Build and maintain a technical debt register/inventory across the platform, with clear ownership, risk scoring, and business impact tied to each item

Champion technical debt reduction as a first-class priority in planning cycles, not an afterthought — balancing it explicitly against new feature delivery

Identify and eliminate redundant systems, data stores, and integration patterns as new solutions come online, rather than letting them accumulate alongside old ones

Define "definition of done" standards that prevent new debt (test coverage, documentation, decoupling, observability) as part of every solution delivered

Integration (internal and external)

Design the integration layer connecting internal solutions to each other and to external parties

Establish consistent integration patterns (API-first) to replace ad hoc, point-to-point connections between systems

Own API strategy and governance across the platform, ensuring internal and external interfaces are consistent, versioned, secure, and well-documented

Act as the technical lead for evaluating and onboarding new external integrations and partners, assessing architectural and security fit before commitments are made

Data lake / shared data platform

Define the architecture and roadmap for a shared data lake enabling every solution on the combined platform to access underlying client data through governed, consistent interfaces

Design the data model, ingestion pipelines, and access patterns so individual solutions can read (and where appropriate, write) shared client data without duplicating or forking it

Establish data governance, lineage, access control, and privacy-by-design controls for shared client data, in line with financial regulatory requirements

Partner with Engineering, Product and Info Sec to define standards for data quality, consent management, and cross-border data handling where applicable

Drive migration of solutions currently holding siloed/duplicated client data onto the shared data layer, in a phased and low-risk manner

Governance, compliance & leadership

Architect for high availability, fault tolerance, and low-latency transaction processing at scale

Lead architectural reviews, set design standards, and ensure consistency across engineering teams working on new and legacy solutions alike

Mentor senior and staff engineers; act as technical escalation point for complex, cross-team, cross-system problems

Produce and maintain architecture documentation, decision records, a technical debt register, and system/data-flow diagrams

Support due diligence, audits, and regulatory examinations with clear technical documentation of both current and target-state architecture

Stay current on emerging fintech technology trends and assess their applicability

What We're Looking For

Required:

15+ years in software engineering, with 5+ years in a solution/enterprise architect role

Proven experience architecting systems in fintech