Jobs in the United States

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Added 1 min ago
Civil Engineer
Harrison Consulting Solutions
Orlando, FL
multi-disciplined engineering firm is looking to add a Civil Engineer to their Orlando team!
Added 2 mins ago
H
Firmware Engineer
HP
Vancouver, WA
- $105,050 to $161,800 USD / year
Collaborate and communicate with management, internal, and outsourced development partners regarding firmware design status, project progress, and issue resolution.
Added 2 mins ago
Intermediate Process Automation & Controls Engineer
Worley
Metairie, LA · Metairie
We are seeking an Intermediate Process Automation & Controls Engineer to join our Consulting team in Metairie, Louisiana. This position is ideal for an engineer with 3-8 years of experience…
Added 2 mins ago
Junior Process Engineer
Worley
ON, CA
We are currently recruiting for a Junior Process Engineer to join our team of world-class experts and dynamic problem-solvers. The successful candidate will support the delivery of process…
Added 2 mins ago
Senior Process Engineer
Worley
ON, CA
As a Senior Process Engineer, you will provide technical process engineering leadership throughout the full project lifecycle, from concept development and design through execution,…
Added 2 mins ago
Department Manager Structural Engineering
Worley
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Strong understanding of Civil, Structural, and Architectural engineering and design practices and multidisciplinary project execution.
Added 2 mins ago
Senior Process Automation & Controls Engineer
Worley
Metairie, LA · Metairie
We are seeking a Senior Process Automation & Controls Engineer to join our Consulting team, the office location is in Metairie, Lousina. This position is ideal for an experienced engineer…
Added 9 mins ago
TT
Member of Technical Staff, Senior
True Talent Solutions Partners
New York, NY
- $150,000 to $300,000 USD / year
- Experience at a venture-backed startup, including as a founder, founding engineer, or software engineer with substantial project ownership.
Added 10 mins ago
WC
Staff Engineer
Williams County
Williston, ND
- $64 to $70 USD / hour
The Staff Engineer performs professional engineering duties related to transportation system planning and maintenance under limited supervision from the County Engineer. Examples of Duties
Added 11 mins ago
Senior Full Stack Software Engineer - Identity Verification & Proofing
Intuit
San Diego, CA · Mountain View, CA
The ideal candidate is an engineer who is very strong in designing and building each layer of enterprise software with full stack engineering mindset and skills. The engineer should have…
Added 13 mins ago
Staff Engineer
BlackLine Systems, Inc.
United States
As a Staff Software Engineer, you will play a crucial role in building the next generation of BlackLine and data platform. BlackLine thrives on data and we are investing heavily in being…
Added 14 mins ago
Consulting Architect
Elastic
United States
Solution Design & Delivery: Translate business and technical requirements into scalable, outcome-driven solutions built on the Elastic Stack.
Added 14 mins ago
Cyber Security Engineer
Academy Sports + Outdoors
Katy, TX
In execution, you design and support identity and access management solutions, troubleshoot security-related network and connection issues, and serve as an IT security subject matter expert…
Added 17 mins ago
Mechanical Engineer
Skyelia
Fitchburg, MA
We are seeking Mechanical Engineer for an established manufacturing company in Fitchburg, MA. The main responsibilities will be to design, develop, test, and improve electro-mechanical…
Added 18 mins ago
Mechanical Engineer II - Projects
Freeport McMoRan
Safford, AZ
Perform and oversee engineering design activities for assigned projects, including modeling, calculations, drawings, and technical specifications, while maintaining accurate documentation…
Added 18 mins ago
Senior Mechanical Engineer - Projects
Freeport McMoRan
Safford, AZ
Serve as the Project Engineering Lead by preparing and authoring engineering documentation, including conceptual designs, feasibility studies, alternatives analyses, failure analyses,…
Added 21 mins ago
EW
Mechanical & HVAC Refrigeration Intern (Summer 2027)
EMC Water LLC
Downers Grove, IL
- $20 to $25 USD / hour
Evaluate new components, technologies, and design concepts for future product applications.
Added 22 mins ago
Land Development Team Lead / Project Manager (PE)
Civil Science
St George
This position is ideal for a licensed Professional Engineer who enjoys balancing hands-on design, project management, client relationships, and team leadership.
Added 22 mins ago
Transportation Design Project Manager - Lehi
Civil Science
Lehi
Civil Science is seeking an experienced Transportation Design Project Manager to support and grow our Utah transportation practice. This opportunity is ideal for a licensed Professional…
Added 22 mins ago
Transportation Design Project Manager - Richfield
Civil Science
Richfield
Civil Science is seeking an experienced Transportation Design Project Manager to support and grow our Utah transportation practice. This opportunity is ideal for a licensed Professional…
Added 22 mins ago
Transportation Design Project Manager - St. George
Civil Science
St George
Civil Science is seeking an experienced Transportation Design Project Manager to support and grow our Utah transportation practice. This opportunity is ideal for a licensed Professional…
Added 22 mins ago
Transportation Design Project Manager - Salt Lake City
Civil Science
Salt Lake City
Civil Science is seeking an experienced Transportation Design Project Manager to support and grow our Utah transportation practice. This opportunity is ideal for a licensed Professional…
Added 22 mins ago
Water Infrastructure Practice Leader - Richfield
Civil Science
Richfield
As the Water Infrastructure Practice Leader, you will provide technical leadership, support project delivery, drive business development, and unify water expertise across multiple offices…
Added 22 mins ago
Water Infrastructure Practice Leader - Las Vegas
Civil Science
Las Vegas
As the Water Infrastructure Practice Leader, you will provide technical leadership, support project delivery, drive business development, and unify water expertise across multiple offices…
Added 22 mins ago
Water Infrastructure Practice Leader - St. George
Civil Science
St George
As the Water Infrastructure Practice Leader, you will provide technical leadership, support project delivery, drive business development, and unify water expertise across multiple offices…

Patronus AI, Inc.

Expert: Interactive Coding, Payments Processing (Contract, Remote)

Remote, United States

Remote

$150 USD / hour

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Job details

Pay: $150 USD / hour
Workplace: Remote
Working hours: 10 hours per week
Posting language: English
Posted: Nov 3, 2026

Original job description

About Patronus AI

Patronus AI is a frontier lab developing simulation research and infrastructure to accelerate progress toward human-aligned AGI. We are on a mission to simulate all of the world’s intelligence.

We are the team behind some of the earliest and most influential research in AI evaluation like FinanceBench, Lynx, SimpleSafetyTests, CopyrightCatcher, Humanity’s Last Exam, and more. We are formerly AI researchers and engineers from companies like Meta AI, Amazon AGI, and Google. Our customers include foundation model labs and Fortune 500 enterprises like Adobe. We are backed by top-tier investors like Lightspeed Venture Partners, Notable Capital, Stanford University, Noam Brown, Gokul Rajaram, and more.

At a glance

Engagement: Independent contractor, fully remote. Live screen-share sessions with our researchers plus short asynchronous write-ups.
Pay: $150 per hour. The trial session is paid.
Commitment: About 10 hours per week, 1 to 3 months to start, with extension for strong performers.
Start: Rolling
Location: Remote, any country, with a few hours of overlap with US or EU working hours.

The role

You'll work live with our research team on coding scenarios in a sandboxed payments codebase: authorization, capture and refund flows, idempotency and retries, webhook handling, reconciliation and settlement, ledger entries, chargebacks and disputes, and 3DS/SCA. You implement or review the change the way you would at work, explain your reasoning as you go, tell us where the scenario doesn't match how money actually moves, and help define what correct looks like.

Each session starts from a scenario we provide. You work through it on a shared screen, land the change or the review, and then write a short note on how you approached it. Your work becomes evaluation and training data for frontier models.

You don't need an AI background. You do need to be the kind of engineer who thinks about the duplicate webhook before the happy path, and who knows which rounding rule the ledger expects.

Areas we're hiring for

Each area is defined by the part of the money-movement path you own, so you should fit exactly one. If you work across two, apply under the one where you spend most of your time.

Payment processing and gateway integration. Engineers who build the checkout and money-movement path: authorization, capture, refund and void flows against a processor or acquirer such as Stripe, Adyen or Braintree, idempotency keys, retries, webhooks and 3DS/SCA. Typical titles: Payments Engineer, Backend Engineer (Payments), Integration Engineer, Checkout Engineer.
Ledger, settlement and reconciliation. Engineers who own the books behind the payments: double-entry ledgers, settlement files, payout schedules, reconciliation against processor and bank reports, currency handling and rounding. Typical titles: Ledger Engineer, Fintech Backend Engineer, Treasury Systems Engineer, Reconciliation Engineer.
Disputes, risk and compliance engineering. Engineers who build chargeback and dispute workflows, fraud and risk rules, card-data handling under PCI DSS, and the audit trails behind them. Typical titles: Risk Engineer, Fraud Platform Engineer, Disputes Engineer, Payments Compliance Engineer.

What you'll do

Implement and review payment flows live with a researcher in a sandboxed codebase: authorization, capture and refund paths, idempotent retries, webhook handlers, ledger entries, reconciliation jobs and dispute handling.
Explain your reasoning as you work, including the edge cases you check first.
Review scenarios we have drafted for realism and difficulty, and flag the failure modes that bite real payments teams: double charges, partial captures, currency rounding, race conditions, and stale or replayed webhooks.
Help write the acceptance criteria for each scenario, including the tempting wrong moves.
Write short notes after each session on how you approached the problem and what you verified.
Work in reviewer feedback within agreed turnaround times, and flag guideline gaps or edge cases you run into.

Who we're looking for

Required

3+ years writing production code for a payment processor, a processor integration, a card issuer or acquirer, a fintech ledger or a bank's payments platform, including work within the last two years. You wrote the code yourself; managing the team is not enough.
Working command of the money-movement lifecycle end to end: authorization, capture, settlement, reconciliation and disputes, and the compliance edges such as PCI DSS and SCA.
Comfortable in at least one of Python, Go, Java or TypeScript, and at reading unfamiliar codebases.
Able to explain your reasoning out loud while you work, in clear professional English.
Reliable availability for scheduled live sessions and the habit of showing the evidence behind every conclusion.

Nice to have

Experience with several processors or rails, such as Stripe, Adyen, card networks, ACH, SEPA or UPI.
Experience writing technical design documents, incident reviews or interview questions for payments systems.
Familiarity with how AI coding agents fail on payments work.

Our standards

All solutions, write-ups and reviews are your own work. LLM-generated code or text is not permitted.
Scenarios and solutions must be original. Nothing may be copied from published or easily searchable sources.
Never include code, configuration or transaction data from a current or former employer or client, or anything covered by an NDA. All companies, systems and scenarios are fictional, and all work is your own.
Quality is judged on correctness, clarity of reasoning and reviewer agreement, not on speed or volume.

How hiring works

Short AI interview and resume review
One paid trial session, scored against a fixed quality checklist
Onboarding and your first project

Patronus AI is an equal opportunity employer. We celebrate diversity in our workplace, and all qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or other legally protected characteristics.

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More about this job

Skills

Research
Regulatory compliance
Python
Go
Oracle Java
TypeScript
Onboarding

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