Payments / Infrastructure Engineer – Fintech

Rnb Consultancy; San Francisco (CA); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Equity

Visa sponsorship available

Job summary

Rnb Consultancy seeks an engineer to own the money-movement stack for a fast-growing fintech in San Francisco. You will manage card issuing, ledger integrity and reconciliation, plus CI/CD, monitoring and risk controls as the system scales from hundreds to hundreds of thousands of cardholders.

We value candidates who have led real distributed-systems with measurable metrics, depth over years, and a penchant for first-principles reasoning. In-person, SF-based, 9–5. Visa sponsorship available.

Qualifications

• Led real distributed-systems and high-throughput work with measurable metrics.
• Some security exposure.
• Reason from first principles rather than copying a previous setup.
• 2+ years of engineering experience (depth over years).
• In person in San Francisco, 9-9-5.

Responsibilities

• Own the money-movement stack: card issuing, ledger integrity and reconciliation.
• Own CI/CD, monitoring and reliability across large-scale cardholders.
• Implement security and fraud controls that scale with volume.
• Make architecture choices from first principles.

Skills

Distributed systems

High throughput

Security exposure

First principles

Job description

You've built a high-throughput system with your own hands. Now own the money-movement stack of a fast-growing fintech.

A seed-stage fintech in San Francisco runs the card and payment rails behind education-funding programs in the US: families get instant access to education money, and program administrators get automated fraud detection. The product is live and growing fast, with new programs coming on board. The team is small, flat and in person, made up of former founders and senior fintech risk people.

What you'll own

• The whole money-movement stack: card issuing, ledger integrity and reconciliation
• CI/CD, monitoring and reliability, from hundreds to hundreds of thousands of cardholders
• Security and fraud controls that hold up as volume grows
• Architecture choices you reason through from first principles

Must-haves

• Real distributed-systems and high-throughput work that you personally led, ideally with numbers (volume, latency, uptime)
• Some security exposure
• You reason from first principles instead of copying a previous employer's setup onto a new problem
• 2+ years of engineering experience (roughly 2–5; depth beats years)
• In person in San Francisco, 9-9-5

Bonus points

• Ledger, reconciliation or card work (a plus, not a must: quant, cloud-infra or security systems count just as well)
• You saw a company scale fast and can explain which shortcuts and tests you chose
• No payments background needed: the team hires on skill, not on a fintech logo

What's in it for you

• $150k–$210k base + 0.8–0.9% equity
• Ownership of a critical system at a company that is doubling down on growth
• Visa sponsorship available

Good to know

• Full-time, in person in San Francisco, 9-9-5
• Process: intro call with a founder → technical deep-dive → take-home plus whiteboard presentation → paid on-site work trial (three to five real projects) → offer