Staff Software Engineer - Fintech

About this role

Staff Software Engineer - FinTech
Software Engineering
Remote – US

Overview:
Pax8 is the technology marketplace of the future, linking partners, vendors, and small to midsized businesses (SMBs) through AI-powered insights and comprehensive product support. With a global partner ecosystem of over 35,000 managed service providers, Pax8 empowers SMBs worldwide by providing software and services that unlock their growth potential and enhance their security. Committed to innovating cloud commerce at scale, Pax8 drives customer acquisition and solution consumption across its entire ecosystem.
Our purpose is to help every small business turn their dreams into reality through the power of technology.
Culture is important to us, and at Pax8, it’s business, and it IS personal. We embody Compassionate Candour by aiming to assist others with candid, actionable feedback. We Seek to Understand by being open, curious, and committed to learning. We believe in We Before Me, actively collaborating and seeking out diverse perspectives to ensure a win for Team Pax8. Our team takes pride in Do What You Say, taking ownership, honoring commitments, prioritizing, and delivering on promises. We encourage everyone to Light Up Learning by being brave and trying new ideas, embracing vulnerability, and sharing failures so everyone can learn. Finally, we are Driven by Passion, connecting personal passion to Pax8's mission, and remaining resilient in the face of adversity and uncertainty in pursuit of our goals.
At Pax8, we are passionate, creative, and humorously offbeat. We work hard, keep it fun, and expect the best.
Position Summary:
The Staff Software Engineer in FinTech combines deep technical ownership with systems thinking to build Pax8's next-generation Revenue Lifecycle Management platform. This platform provides the financial infrastructure behind our global marketplace, supporting how technology is bought, sold, billed, settled, and managed.
As Pax8 evolves toward a managed intelligence marketplace, this role also helps build the commerce foundations for the AI economy. You will develop capabilities that support subscription and usage-based consumption models, including token consumption and emerging AI-driven transactions, with the accuracy, reliability, auditability, and scale required of financial infrastructure.
Our FinTech group spans Product Information Management (PIM); Configure, Pricing, Quote (CPQ); Order to Cash (O2C); Fulfillment, Entitlement, and Metering (FEM); Foreign Exchange (FX). We are looking for engineers with meaningful experience across two or three of these areas, with relevant backgrounds that may include payments, subscriptions, revenue recognition, and financial reconciliation.
This role combines that domain experience with a Frontier engineering profile: an AI-native, hands-on builder who uses spec-driven development and agents to increase engineering productivity while retaining accountability for architecture, code quality, validation, and production outcomes.
The Staff Software Engineer is individually accountable for building, hardening, and operating a system that other teams and business functions depend on. They hold the problem space long enough to develop deep expertise and innovate within it. They earn the right to set its direction by shipping and running the system.
This role is measured on five dimensions: Craftsmanship, Impact, Mentorship, Safety, and State of the Art. At staff level, judgment, systems thinking, and safety must support consequential decisions in systems with broad financial and organizational reach.
This role is measured on five dimensions (Craftsmanship, Impact, Mentorship, Safety, and State of the Art). What separates it from Software Engineer is that Judgment, Systems Thinking, and Safety now have to hold up against a problem where being wrong is expensive and, often, no one else is positioned to catch it.
Essential Responsibilities (includes, but is not limited to):
· Own, build, and operate a technically complex FinTech system that requires its own technical strategy. Drive precise specifications, architecture, implementation, and production operation.
· Apply domain expertise across relevant revenue lifecycle areas, understanding how product information, pricing, orders, subscriptions, fulfillment, usage, and financial transactions affect one another.
· Build commerce capabilities for subscription and usage-based models, including metering, token consumption, billing, and settlement, in partnership with Product.
· Make consequential calls about what to build, scale, or retire on ambiguous problems. Drive them to clarity through iteration and collaboration, and own the outcome.
· Exercise systems thinking beyond your ownership boundary. Optimize the revenue lifecycle end to end, adjust plans when a local improvement creates downstream problems, and pursue the right fix through influence, contribution, or escalation.
· Own your domain: identify high-impact problems, scope solutions, and build them using AI agents and enterprise-approved tools across the development lifecycle.
· Use spec-driven development to make business rules, system behavior, edge cases, and acceptance criteria explicit enough to guide both engineers and agents.
· Design for financial correctness, data integrity, auditability, and resilient operation across interconnected systems.
· Instrument systems for adoption, usage, reliability, and financial accuracy from the start. Prove delivered value against a falsifiable, data-backed standard.
· Partner with Product, Finance, Compliance, Operations, Commercial, and engineering teams to translate financial and commercial requirements into reliable software, escalating business policy decisions to the appropriate owners.
· Implement financial controls and traceability that support auditability, revenue recognition, taxation, and applicable compliance requirements in collaboration with domain experts.
· Build platform capabilities…