Flex · 15 hours ago
Senior Engineering Manager, Payments
United States
Full-time
Remote
Senior Level, Lead/Staff
$240K/yr - $300K/yr
8+ years expFlex is a growth-stage FinTech company headquartered in New York City, focused on revolutionizing the rent payment experience. They are seeking a Senior Engineering Manager to lead the Payments platform team, responsible for overseeing the entire payment lifecycle and ensuring financial integrity across multiple payment systems.
FinanceFinTechPaymentsSoftwareAppsBillingFinancial Services
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
Qualification
Required
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
Preferred
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
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
Company
Flex
Flex enables people to pay rent bills on a schedule that fits their personal finances.
201-500 employees
H1B Sponsorship
Flex has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
2024 (1)
Funding
Current Stage
Growth StageTotal Funding
unknown2025-03-31Series A
2019-11-01Seed
2019-07-24Pre Seed
Leadership Team
Shragie Lichtenstein
Co-Founder & CEO
Michael Jannain
Staff Software Engineer
Recent News
Flexible Finance, Inc.
2025-10-14
Flexible Finance, Inc.
2025-10-09
2023-12-15
Company data provided by crunchbase