Jobs in the United States

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Added 2 mins ago
Senior Graph Engineer (Python)
Evolver
Palo Alto, CA
…maximize efficiency and accuracy. Join us to build the knowledge infrastructure that connects enterprise information and powers intelligent…
Added 2 mins ago
Senior Full-Stack Engineer - Application Experiences (Vue/React, Python)
Evolver
Palo Alto, CA
We are looking for a Senior Full-Stack Engineer to join our Application Experiences team and build applications that bring our AI platform into everyday enterprise work.
Added 9 mins ago
IA Research Engineer (Kernels) Intern
Etched
San Jose, CA
…and staffed by leading engineers, Etched is redefining the infrastructure layer for the fastest growing industry in…
Added 19 mins ago
Senior Frontend/Full Stack Engineer
AgentSync
Denver, CO
…manual processes. AgentSync is fixing that. We build modern infrastructure for carriers, agencies, and MGAs that makes compliance automatic and growth…
Added 21 mins ago
Embedded Software Engineer
York International Corp.
United States
…solutions that help transform buildings, cities, and critical infrastructure around the…
Added 21 mins ago
Senior Software Engineer - Computational Geometry
York International Corp.
United States
Thermal constraints limit AI infrastructure, semiconductor equipment, power electronics, and defense systems. Johnson Controls removes those constraints. Enabled by the Stack Forging™…
Added 22 mins ago
O
Senior Core Infrastructure Engineer
Oracle
Seattle, WA
- $79,200 to $209,500 USD / year
We’re looking for a Senior Core Infrastructure Engineer who is excited by challenges in distributed systems, cloud-scale storage, data replication, and performance optimization. If you’re…
Added 22 mins ago
O
Senior Core Infrastructure Engineer
Oracle
Nashville, TN · Austin, TX
- $79,200 to $209,500 USD / year
–Collaborates with the team to ensure cloud infrastructure complies with relevant industry standards and regulations and that documentation is up-to-date
Added 22 mins ago
T
Azure Devops Engineer
TEKsystems
Fort Mill, SC
- $50 to $80 USD / hour
DescriptionSeeking a skilled DevOps Engineer help optimize our DevOps practices, and ensure the reliability and performance of our technology infrastructure. This role is critical for…
Added 27 mins ago
Principal Site Reliability Engineer- Electronic Trading Services
JPMC page
Jersey City, NJ
As a Principal Site Reliability Engineer at JPMorganChase within the Enterprise Technology, Infrastructure Platforms team , you draw upon your advanced knowledge to identify new…
Added 29 mins ago
Desktop / Endpoint Engineer
SEI INVESTMENTS COMPANY
Oaks, PA
Added 29 mins ago
Microsoft 365 Data Protection & Copilot Architect
SEI INVESTMENTS COMPANY
Oaks, PA
…governance, and ongoing compliance. * Partner with security, cloud, infrastructure, managed services, and security operations teams to align AI deployments with Zero Trust principles and…
Added 31 mins ago
A
MES Engineer
Actalent
Reading, PA
- $90,000 to $100,000 USD / year
…regular exposure to plant-floor operations. The Automation Engineer will work with MES platforms, industrial control systems, PLCs, SCADA/HMI systems, SQL databases, and networking…
Added 31 mins ago
Principal civil engineer
Worley Parsons
Reading, PA
Added 31 mins ago
Principal Structural Engineer
Worley Parsons
Reading, PA
Added 31 mins ago
Lead AI Software Engineer
Humana Inc.
Louisville, KY · Fort Lauderdale, FL · Nashville, TN · Tampa, FL · Dallas, TX
We're seeking a Lead AI Software Engineer to help build the next generation of AI-powered products and platforms. This is a hands-on technical leadership role focused on designing,…
Added 32 mins ago
Lead Application Support Engineer-Java/AWS
CGI Technologies and Solutions, Inc.
Pittsburgh, PA
We are seeking a highly skilled Senior Application Support & Maintenance Engineer to support and enhance a business-critical enterprise application ecosystem. The successful candidate will…
Added 40 mins ago
TT
Infrastructure Engineer
True Talent Solutions Partners
San Francisco, CA
- $150,000 to $300,000 USD / year
Help build and secure the infrastructure behind an enterprise AI data platform for financial services. You will work across cloud infrastructure, data systems, and AI workloads to support…
Added 48 mins ago
Zero Trust ICAM Engineer
Booz Allen Hamilton_United States
Fayetteville, NC
As an ICAM Engineer within the Department of War, you'll craft solutions that strengthen national defense and safeguard mission-critical assets while championing a zero-trust strategy.…
Added 49 mins ago
Sr. Instructor, Training- Cloud Security (Remote)
CrowdStrike, Inc.
Remote, United States
Added 53 mins ago
Presales Solution Engineer - Edge AI
HP
Remote, United States
The Presales Solution Engineer – Edge AI is a customer-facing technical leader responsible for transforming Edge AI opportunities into measurable business outcomes and production-ready…
Added 58 mins ago
ND
Front Office Automation Tester
NTT DATA Americas, Inc.
Charlotte
- $90,000 to $115,000 USD / year
We are seeking a Senior QA Automation Engineer to support Front Office Sales & Trading technology platforms. This role is responsible for designing, developing, and executing automated…
Added 1 hour ago
Sr. ASIC Design Verification Engineer
Cisco Systems, Inc.
San Jose, CA
Architect, develop, and maintain block, cluster, and top-level Design Verification (DV) environment infrastructure
Added 1 hour ago
SA
SEO Automation Engineer
Search Atlas
Remote, United States
- $17 to $28 USD / hour
…$30M+ ARR company, 215 people, bootstrapped, and building the infrastructure for the next era of marketing. No outside funding. No fluff. Just…
Added 1 hour ago
SA
Senior Full-Stack Engineer (Django / Next.js)
Search Atlas
Remote, United States
- $25 to $30 USD / hour
We're looking for a Senior Full-Stack Engineer to own features end-to-end, from database schema to shipped UI, across the products our customers rely on every day. If you want real…

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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