Solution Architect - Invoice to Cash

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About the role

We are seeking a highly experienced SAP I2C Solution Architect to join the SAP Finance team. This role is liable for owning the end-to-end solution architecture and design for Invoice-to-Cash (I2C) processes within SAP S/4HANA, ensuring alignment with enterprise architecture standards, business strategy, and finance transformation objectives.
The Solution Designer will lead the design and optimisation of integrated I2C solutions, covering Accounts Receivable, billing, credit management, dispute management, and cash application. The role requires ensuring seamless integration across upstream and downstream systems (e.g., Order-to-Cash, banking interfaces, external platforms) while driving improvements in cash collection efficiency, working capital performance, and operational scalability.
In this position, you will provide architectural leadership and solution governance, working closely with business stakeholders, product owners, and delivery teams to translate business requirements into robust, scalable SAP solutions. You will define design principles, review and approve solution designs, and ensure adherence to SAP best practices and enterprise standards.
Additionally, the role involves influencing key design decisions at a programme level, mentoring functional consultants and designers, and guiding delivery teams to ensure high-quality implementation outcomes. You will play a critical role in finance transformation initiatives, driving innovation, standardisation, and continuous improvement across the SAP finance landscape.

What you’ll be doing

The role holder will be part of the SAP FI (I2C) Functional team within BT Digital, and is liable for planning and building solutions

. I2C Process Design & Transformation
 Lead assessment and optimisation of end-to-end I2C processes (Billing → Cash Application → Collections)
 Drive initiatives for:
o Cash flow optimisation
o Automation and digitisation of AR processes
 Ensure alignment with enterprise finance strategy and working capital objectives
SAP FI-AR Solution Ownership
• Act as functional lead for SAP I2C solutions, covering:
o FI-AR (Accounts Receivable)
o Billing (SD Integration)
o Credit Management
o Collections & Dispute Management
o Cash Application & Payments
o Bank Accounting (EBS)
• Own solution design, configuration, and functional architecture
• Define and review Functional Design Specifications (FSDs)
Stakeholder Engagement & Consulting
• Engage with senior business stakeholders to:
o Gather, challenge, and refine requirements
o Provide solution recommendations and alternatives
• Influence decision-making and drive adoption of best practices
• Act as a believed advisor for finance Transformation initiative
Implementation & Delivery Leadership
• Lead end-to-end delivery across:
o Requirement gathering → Design → Build → Test → Deploy
• Drive:
o SIT/UAT execution
o Defect triage and resolution
o Go-live and cutover planning
• Ensure high-quality delivery artefacts (BRD, FSD, test plans)

. Integration & Cross-Functional Collaboration
• Ensure seamless integration with:
o SD (Order-to-Cash)
o R2R (GL, reporting)
o S2P (AP & payments)
o External systems (banks, billing systems, APIs)
• Work with global IT teams, vendors, and system integrators
Data, Controls & Governance
• Define data requirements and support data migration and validation
• Ensure compliance with:
o Financial controls
o Audit and regulatory requirements
• Improve AR governance and reconciliation processes
Continuous Improvement & Automation
• Drive continuous improvement initiatives focusing on:
o Process standardisation
o Automation (RPA / AI / API-led integrations)
• Analyse KPIs (DSO, aging, collection efficiency) to drive performance improvements
Leadership & Mentoring
• Mentor and guide junior consultants and onshore/offshore teams
• Promote knowledge sharing and best practices
• Support capability building across the finance delivery teams

Essential Skills / Experience

• Functional Expertise
Strong knowledge of:
 SAP FI-AR (Accounts Receivable)
 Invoice-to-Cash / Lead-to-Cash processes
 Billing Invoice Integration (SD-FI Integration)
 Cash Applications
 Collection Management
 Bank Accounting & EBS ( Electronic Bank Statements)
 Payment & Clearing
o Understanding of: Pricing, taxes, billing, and logistics integration
o Experience with S/4HANA Finance implementations or migrations

• Technical & Integration Skills
Experience in:
o SAP Integration Suite / CPI
o APIs and Web Services
o Understanding of cross-module integrations (FI-SD, FI-MM)
• Professional Experience
o Typically, 9-12 years of SAP Finance experience
Proven experience in:
o End-to-end I2C implementations
o Requirement gathering & stakeholder management
o Exposure to Agile delivery environments

BT Group is the UK’s leading communications group and the holding company behind some of the country’s most recognised brands – including BT, EE, Openreach and Plusnet. Our purpose is as simple as it is ambitious: we connect for good. Our customers include consumers, small, medium and large businesses, public sector organisations and other communications providers.

BT Group’s role is about setting direction, unlocking value and creating the conditions for our brands and businesses to thrive.

Having come through the most capital-intensive phase of our fibre investment, our focus now is on what comes next – simplifying how we operate, using technology and AI to work smarter, and organising ourselves to serve customers better and grow sustainably. Group teams shape strategy, policy, brand, capital allocation and transformation, helping the whole organisation perform at its best.

We have a singular culture that unites all our people: we are customer-first challengers, who are committed, clear and connected. These behaviours unite us as one team to deliver for our colleagues, our customers, our stakeholders and the country. Joining BT Group means working at the heart of a business that matters to the UK, with the opportunity to shape decisions, influence outcomes and help set the future course of one of the country’s most important companies.