Senior Engineering Manager, Payments

Flex • New York, NY

2d • Remote

About The Position

We are hiring a Senior Engineering Manager to lead the Payments platform team, responsible for the systems that charge customers, collect funds, and handle refunds.
This team owns the end-to-end payment lifecycle: authorization, charge, refund, reconciliation, and financial integrity across multiple payment rails and processors.
You will lead a team of backend engineers responsible for building a highly reliable, compliant, and cost-efficient payments platform that supports rapid product expansion while safeguarding customer funds.
This role requires hands-on leadership, you will drive architecture, execution, operational excellence, and team growth while partnering closely with Product, Risk, Finance, Compliance, and external financial partners.

Requirements

• 8+ years of backend engineering experience and 3+ years managing engineers
• Experience building or operating payments, fintech, banking system
• Strong understanding of distributed systems reliability and data integrity
• Experience owning production services with strict uptime and correctness requirements
• Track record delivering large cross-functional initiatives

Nice To Haves

• Experience with payment rails (ACH, card networks, RTP, wires, payouts)
• Experience integrating payment processors (Stripe, Checkout, Adyen, bank APIs, etc.)
• Experience in regulated environments (KYC, NACHA, chargebacks, reconciliation)
• Familiarity with financial ledger or accounting correctness principles
• Background scaling high-growth consumer or fintech platforms

Responsibilities

• Define and execute the long-term architecture of Flex’s multi-rail payments platform (Card, ACH, RTP, OCT, FedNow, etc)
• Ensure financial correctness across ledgering, settlement, reconciliation, and refunds
• Drive reliability and resilience for mission-critical money movement systems
• Guide design reviews and make high-impact technical decisions
• Lead cross-team initiatives spanning product, risk, and finance workflows
• Own delivery of large, ambiguous projects from concept to production
• Improve system scalability, observability, and incident response practices
• Reduce payment processing costs through routing strategy and platform optimization
• Manage, mentor, and grow a team of backend engineers
• Establish strong ownership culture and operational excellence
• Hire and develop senior engineers and future technical leaders
• Elevate engineering quality, testing discipline, and design rigor
• Ensure high availability and financial accuracy SLAs
• Lead incident response for payment-related issues
• Build guardrails to prevent financial and compliance risk
• Partner with Risk & Compliance teams on regulated workflows

Benefits

• Competitive medical, dental, and vision available from Day 1
• Company equity
• 401(k) plan with company match (our company match kicks off at the beginning of 2026)
• Unlimited paid time off + 13 company paid holidays
• Parental leave
• Flex Cares Program
• Free Flex subscription
• Competitive compensation + company equity
• Unlimited PTO

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed