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Added 6 mins ago
Mechanical Design Engineer
Actalent
Carson, CA
Work EnvironmentThe Mechanical Design Engineer works in a professional engineering environment focused on the design and development of electromechanical products for space, military,…
Added 13 mins ago
Lead Project Engineer - Aircraft Surveillance
Real Time Consulting, LLC
Phoenix, AZ
JOB TITLE: Lead Project Engineer - Aircraft Surveillance Products
Added 18 mins ago
Project Manager
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…problems, and collaborate with Yancey Sales Reps to exceed our customer’s project expectations. You should possess a strong sense of urgency and desire to provide superior customer service.…
Added 27 mins ago
Senior Engineer - Voice and Call Center
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Added 31 mins ago
Consulting Architect
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End-to-End Engagement: Lead the delivery of customer projects from discovery and roadmap design through implementation, enablement, and optimization.
Added 31 mins ago
Cyber Security Engineer
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…technical information to non-technical audiences, document project requirements, define key performance indicators, and produce reports that show project…
Added 39 mins ago
Senior Azure Cloud Engineer
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Strong problem solving and customer service skills
Added 39 mins ago
A
Quality Engineer
Actalent
Torrance, CA
- $100,000 to $180,000 USD / year
OverviewThe Quality Engineer ensures customer quality requirements are understood, documented, and met. This role supports new customer onboarding, manages audits, improves quality…
Added 40 mins ago
ME
Account Manager - Commercial HVAC
Mesa Energy Systems, Inc.
Kent, WA
- $65,000 to $125,000 USD / year
…various methods including contacting prospective client Chief Engineer, Property Managers, and/or Asset Managers, etc.• Making phone calls, visits, attending conferences, utilizing the…
Added 42 mins ago
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Transportation Engineer Associate - Cedar Rapids
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Cedar Rapids, IA
- $32.13 to $49.76 USD / hour
Working under the guidance of experienced Professional Engineers, you’ll gain hands-on experience in construction project management while collaborating closely with contractors,…
Added 44 mins ago
Sr. Developer
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Remote, United States
Advise other disciplines such as customer service and technical operations when application questions arise
Added 53 mins ago
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Director of Environmental Services & Compliance
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Portland, OR
- $170,100 to $251,550 USD / year
…the communities we serve. Our vision is to be the leader in service excellence, innovation and environmental stewardship for our customers, while building on our strengths as a trusted…
Added 56 mins ago
Associate AI Research Engineer
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Project experience in one or more of the following technical areas: agentic AI, deep reinforcement learning, computer vision, generative AI
Added 56 mins ago
SCADA Support Engineer
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The SCADA Support Engineer will provide Field Support for SOLV SCADA solutions.
Added 1 hour ago
Senior Reliability Engineer
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Customer focused to provide quality service to improve equipment and process reliability.
Added 1 hour ago
Technical Robot Phone Support
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Ability to discuss, diagnosis, and resolve problems as reported by the customer or service engineer
Added 1 hour ago
PA
Expert: Interactive Coding, Site Reliability Engineering (Contract, Remote)
Patronus AI, Inc.
Remote, United States
- $150 USD / hour
You don't need an AI background. You do need to be the kind of engineer who reads the dashboard before touching the config, and who can say out loud why a tempting fix is the wrong one.
Added 1 hour ago
PA
Expert: Interactive Coding, Payments Processing (Contract, Remote)
Patronus AI, Inc.
Remote, United States
- $150 USD / hour
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.
Added 1 hour ago
Information Security Engineer
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The Doctors Company has an opportunity for an Information Security Engineer. This is a hybrid opportunity based at our office in Napa, CA or Sherman Oaks, CA.
Added 1 hour ago
Flight Test Engineer
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As a UAS Flight Test Engineer you will plan, execute and report on developmental and operational flight Test & Evaluation (T&E) activities. You will work alongside a team of engineers and…
Added 1 hour ago
Senior Solutions Engineer
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The Senior Solutions Engineer will be the trusted expert in telecommunications technology and Zayo’s products, consulting with customers to collaboratively design solutions that customers…
Added 1 hour ago
Engineering Manager, DevOps - Moveworks
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It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 1 hour ago
Lead Backend Engineer
Wawa Inc. (210515330)
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Excellent oral and written communication skills, customer service skills
Added 1 hour ago
Enterprise Architect - Data Engineer
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The Data Engineer works on unusually complex technical problems, develops highly innovative solutions, and exercises considerable independence in determining the approaches necessary to…
Added 1 hour ago
Mechanical Engineer II
Wabtec
Buffalo Grove, IL
As an engineer within Wabtec Bus Solutions, you will support the design and development focused on a mix of door systems, wheelchair lifts/ramps, windows, driver’s barriers, charging…

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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