Principal Payments Engineer

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  Guarantee correctness at scale. Define how the platform guarantees a payment executes exactly once, even under partial failure, retries, and cross-service races - and make that guarantee a first-class, testable property of the system, not a convention people are trusted to follow.

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  Set the API contract. Design the internal/external API surface partners and internal teams both build against - versioning, backward compatibility, webhook delivery guarantees - so there's no split between what we use internally and what partners get.

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  Direct money-movement architecture. Set the direction for multi-rail orchestration (ACH, wire, RTP/FedNow, card networks) across multiple financial institutions, including direct connections to our sponsor banks and networks like Visa Direct, and how the platform routes, retries, and fails over rails and FIs.

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  Own batching, funding, and reconciliation. These are the functions where a broken promise gets noticed fastest - partners feel it directly when funding is late or reconciliation doesn't match. Bring the same rigor here as anywhere else in the platform: accurate matching against external settlement data, fast exception handling, and no surprises.

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  Build reliability and observability from day one. Establish the architecture-review and RFC standards, plus the monitoring and alerting, that let us catch trouble before it takes down live payment processing - not after.

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  Set the bar for the team. Establish the practices, review standards, and technical hiring criteria the payments engineers who join after you will be held to. You're setting the bar, not just clearing it.

• These are the core requirements for the role. We don't expect every candidate to check all of them, but this is a senior bar and we're looking for genuine depth across most.

• 12+ years building production payments or financial systems, with direct experience operating at $10s to $100s of billions in GMV and a track record of owning architecture and seeing big decisions through to production.

• Direct experience designing or operating a double-entry ledger in production - you can speak fluently to derived balances, hot-account partitioning, and schema evolution under load.

• Direct experience building idempotent, exactly-once payment flows in real-time, high-throughput systems, and can describe concretely how you held correctness under load - when a retry landed on a different instance than the original request, or when a database write failed after a payment had already been authorized.

• Experience designing distributed data architecture and petabyte-scale storage systems, and building high-throughput services that hold sub-50ms latency under real production load.

• Deep experience with settlement and reconciliation against real external data - bank files, card network settlement, ACH returns - treating mismatch detection as core system design, not an afterthought.

• Experience with multi-rail money movement (ACH, wire, RTP/FedNow, card networks) and multi-FI orchestration, including direct integrations with sponsor banks and networks like Visa Direct rather than only processor intermediaries.

• A high technical bar set through influence and example. You make the work and the people around you better, and you're as comfortable in the codebase as you are in a design review.

• Prior experience at a payments platform operating at comparable scale, at a company like Stripe, Block/Square, Modern Treasury, Marqeta, or Adyen.

• Experience modernizing or hardening a payments platform at scale - taking existing, load-bearing systems and rebuilding them into best-in-class infrastructure without stopping the money.

• Familiarity with PCI DSS, ISO 20022 messaging, and scheme-level settlement file formats.

At Payabli, you'll have a front row seat into building a high-growth venture backed fintech company. As a senior leader in Operations, you'll shape how the organization scales and be the driving force behind our AI-first operations strategy — directly influencing how we build, automate, and optimize for the future. You'll stretch yourself every day, learn a ton, grow alongside the company, and have a lot of fun building Payabli with us. We're a values driven company that cares deeply about our team, partners, and customers. Our north star values are:

• Competitive salary

• Stock options with the potential to unlock more equity as we grow

• Flexible PTO and paid parental leave

• Medical, dental, & vision insurance

• 401K, HSA, pre-tax savings programs

Payabli is an equal opportunity employer and values a diverse, inclusive workplace.

Principals only. No external agency submissions. Candidates must apply directly; We will not accept submissions from third-party recruiters or staffing agencies.