Senior Engineering Manager - Team Billing in London

Fin is the AI Customer Agent company on a mission to help businesses provide perfect customer experiences. Our AI Agent Fin is the highest-performing AI Customer Agent on the market today, enabling businesses to deliver impeccable, always-on customer support across the customer journey – from service, to sales, to ecommerce. Powered by our own AI models, Fin resolves complex customer issues end-to-end across every channel, with minimal set-up and integration.

Founded in 2011, Fin became one of the fastest growing companies and remains one of the largest private software companies in the world with nearly 30,000 global businesses using our products to transform their customer support. Driven by our core values, we push boundaries, build with speed and intensity, and relentlessly deliver incredible value to our customers.

What’s the opportunity? Join Fin as a Senior Engineering Manager to lead Team Billing — the group that owns the core systems powering how customers buy Fin, how we meter usage, bill accurately, recognize revenue, and keep money flowing. This is a high-impact, high-visibility role at the heart of Growth Engineering, partnering closely with Pricing & Packaging, Order, Self-Serve, Sales, Finance, Enterprise Systems, Analytics, and Billing Operations. You’ll drive clarity, focus, and execution across a mission-critical platform while fostering a culture of ownership, accountability, and incredibly high standards.

What will I be doing?

• Lead and scale a team building and enhancing Fin's billing, subscription, invoicing, and metering capabilities — the backbone of revenue and monetization experiences.
• Own and improve the reliability and operational excellence of Billing systems: on-call quality, incident response, observability, and product health standards.
• Partner with Senior and Staff Engineers to shape and execute the technical strategy across subscription management, metering, invoicing, and integrations (e.g., Stripe Billing) — balancing near-term needs with long-term platform evolution.
• Collaborate deeply with Product, Design, Sales, Finance, Enterprise Systems, Analytics, and Billing Ops to prioritize the roadmap, close operational gaps, and deliver measurable business outcomes each quarter.
• Cultivate and manage trusted relationships with partner leaders in Finance, Enterprise Systems, and Analytics to ensure alignment on data flows, compliance, reconciliation, and business reporting needs.
• Drive migrations and modernization work where needed (e.g., Stripe-first capabilities, systems parity and improvements), ensuring safe change management and robust downstream data flows.
• Bring clarity and alignment to priorities, tradeoffs, and timelines; set a high bar for planning, testing, and end-to-end quality, especially for revenue-impacting launches.
• Develop and retain top talent through coaching, clear expectations, and effective delegation; scale yourself via strong tech-lead partnerships and “coach-and-delegate” leadership.
• Promote a culture of ownership, accountability, and incredibly high standards — moving quickly, communicating crisply, and celebrating wins.

What skills do I need?

• 5+ years managing software engineering teams building and shipping customer-facing or revenue-impacting systems (e.g., billing, payments, pricing, subscriptions).
• Strong technical leadership: comfortable diving into architecture, debugging complex systems, reviewing designs, and making pragmatic tradeoffs to ship safely and fast.
• Proven ability to lead a cross-functional, full-stack team through planning and delivery with clear ownership of business outcomes and product health metrics.
• Excellent product sense and customer empathy — you translate ambiguous requirements into clear scopes, milestones, and measurable impact.
• Skilled communicator who drives alignment across partner teams (Sales, Finance, Enterprise Systems, Analytics, Product, Design) and keeps stakeholders informed and unblocked.
• Track record of cultivating and managing senior relationships across Finance, Enterprise Systems, and Analytics to land durable solutions and accurate downstream reporting.
• Relentless about outcomes — you identify the highest-leverage problems, remove roadblocks, and hold the bar on quality without slipping schedules.
• AI-first mindset with a high bar for excellence: fluent in using AI tools to accelerate planning, execution, quality, and communication — and to inspire adoption across the team.

Bonus skills & attributes

• Experience with Stripe Billing or similar billing/subscription platforms; familiarity with usage metering and invoicing pipelines.
• Background in customer-facing SaaS and/or scale-up environments operating at high velocity.
• Experience leading operational excellence initiatives (on-call, incidents, observability) for revenue-critical systems.

What success looks like (first 30/60/90)

• 30 days: You understand the domain, architecture, on-call posture, partner landscape, and active initiatives; you’ve built trust with engineers and partner leads and stabilized any urgent operational issues.
• 60 days: Clear, realistic roadmap and execution plan across platform, product health, and partner asks; visible improvements in on-call rigor and update cadence; risks surfaced with mitigation plans co-owned with Finance, Enterprise Systems, and Analytics.
• 90 days: Shipped at least one meaningful capability or reliability improvement; measurable progress on top business outcomes; staffing/skills gaps identified with a concrete plan to address them.

Team & domain

• Mission: Bill customers reliably and accurately, and provide core monetization and operational capabilities for Fin.
• Partners: Pricing & Packaging, Order, Self-Serve, Sales, Finance, Enterprise Systems, Analytics, Billing Ops, Data/Analytics.
• Key areas: Subscription management, usage metering (e.g., Fin features), invoicing, revenue recognition data flows, admin tools, and ops workflows.

Benefits:

• Competitive salary and equity in a fast-growing start-up.
• We serve lunch every weekday, plus a variety of snack foods and a fully stocked kitchen.
• Regular compensation reviews - we reward great work!
• Pension scheme & match up to 4%.
• Peace of mind with life assurance, as well as comprehensive health and dental insurance for you and your dependents.
• Flexible paid time off policy.
• Paid maternity leave, as well as 6 weeks paternity leave for fathers, to let you spend valuable time with your loved ones.
• If you’re cycling, we’ve got you covered on the Cycle-to-Work Scheme. With secure bike storage too.
• MacBooks are our standard, but we also offer Windows for certain roles when needed.

Policies: Fin has a hybrid working policy. We believe that working in person helps us stay connected.