Senior Product Manager (Payments)

Join Medius, a fast-scaling company in the Spend Management space. As a Senior Product Manager for Payments, you'll own a significant domain within Medius Payments, focusing on B2B card products, payment rails, partner integrations, and spend management workflow automation. You'll work hands-on with engineering and design, navigate payment partner relationships, and ensure our card and payment capabilities meet the demands of mid-market and enterprise finance teams across multiple geographies.

• Ownership of the product roadmap and outcomes for the B2B card programs and underlying payment rails.
• Defining and defending prioritization decisions with clear commercial and customer rationale, balancing near-term execution with longer-term strategic bets.
• Monitoring the B2B payments landscape and translating these into actionable roadmap inputs, including emerging payment schemes and regulatory shifts.
• If you’re passionate about technology, eager to make an impact, and ready to grow alongside a team that lives its values, Medius is where you can do your best work — your impact is global
• Exceptional written and verbal communication skills — able to write a crisp PRD and explain payment complexity in plain language to a CFO or an engineer alike
• Experience working directly with external payment partners, card scheme networks, or banking providers at a product level
• Deep hands-on expertise in B2B card products — virtual cards, commercial card programmes, buyer-initiated payments, or equivalent — and how they integrate within AP or procurement workflows
• Proven track record of owning and delivering complex, multi-geography payment products end-to-end
• 7+ years of product management experience, with a significant portion focused on B2B payments products in SaaS, fintech, or financial services
• Comfortable operating in a fast-paced, global environment with multiple parallel workstreams
• Strong understanding of payment rails in the US, UK and EU (ACH, Checks, Cards, BACS/CHAPS, SEPA, card scheme networks) and how they underpin B2B payment product design
• Led end-to-end B2B software product lifecycle as a PM from discovery, requirements, prototyping, implementation, through launch and post-release optimisation
• Experience at a B2B SaaS scale-up or payments infrastructure company
• Able to review and take accountability for AI-generated output and set appropriate decision-authority boundaries for agents operating within a product team
• Comfortable using AI tools as part of daily product work — agent-assisted spec writing, AI-powered discovery synthesis, or automated PRD drafting
• Experience with AP automation, ERP integrations, or spend management platforms
• Familiarity with US, UK and/or EU payment regulation