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Principal Platform Software Engineer
Oracle
Nashville, TN
- $104,500 to $234,600 USD / year
We are looking for a Senior Software Developer (IC3) who enjoys building reliable software systems and solving challenging engineering problems. This role is ideal for engineers with strong…
Added 1 min ago
Industrial Engineer, Distribution Center
Ross Stores, Inc.
Fort Mill, SC
The Productivity Engineer I is responsible for the development, implementation, documentation, and support of the engineered production standards as well as the development and…
Added 1 min ago
R&D Engineer
GE Vernova
Greenville, SC
The R&D Engineer is responsible for the design of new fluid & mechanical accessories systems and equipment of the gas turbine (GT) power plant for R&D programs
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Staff Full-stack Engineer - Shopping (Remote-eligible)
Capital One
Columbia, SC
As a Staff Engineer at Capital One, you will be part of a community of technical experts working to define the future of banking in the cloud. You will work alongside our talented team of…
Added 1 min ago
Senior Staff Engineer - Agentic Identity
Cisco
Columbia, SC
…software that protects and powers the next generation of AI…
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Senior Business Intelligence Engineer
Humana
Columbia, SC
The Senior Business Intelligence (BI) Engineer engages with business value streams on diverse and complex opportunities leveraging a variety of technology platforms. The individual will…
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Data Scientist 1
Baylor Scott & White Health
Columbia, SC
AI, agentic systems, healthcare AI, and responsible AI.
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Supply Chain Capacity Engineer
Meta
Columbia, SC
Meta is seeking a Planning & Capacity Engineer to join the Infrastructure Supply Chain and Engineering (ISCE) Planning team to focus on planning optimization for all of Meta’s…
Added 2 mins ago
ENGINEER QUALITY 3
HII
Goose Creek, SC
Develops, modifies, applies and maintains quality evaluation and control systems and protocols for processing materials into partially finished or finished materials product. Collaborates…
Added 13 mins ago
Traffic Signal Technician - Centennial, CO
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Centennial, CO
This position is responsible for working with the City Traffic Engineer and other staff (Operations, Engineering, Traffic Management Center, and others outside of Traffic Services) to…
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Software Engineer IV - ERP Finance (Oracle/PLSQL)
Charter Communicatio
Greenwood Village, CO
Added 13 mins ago
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Backend Engineer
ManpowerGroup
Greenwood Village, CO
- $55 to $70 USD / hour
Our client, an enterprise technology organization, is seeking a Backend Engineer to join their team.
Added 13 mins ago
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Early Career Process Engineer
Geosyntec Consultant
Lakewood, CO
- $70,520 to $92,350 USD / year
Added 13 mins ago
Senior Automated Test Engineer
Leidos
Englewood, CO
Leidos is seeking a Senior Test Automation Engineer to help deliver mission-essential software capabilities that enable intelligence professionals to access critical information, analyze…
Added 13 mins ago
RS
Systems Engineer
Redwire Space, Inc.
Littleton, CO
- $92,000 to $126,000 USD / year
Added 13 mins ago
Software Engineer Level 2 or 3 (AHT)
Northrop Grumman
Aurora, CO
About our organization: As an engineer, you'll be joining our growing Aurora Software department which has 200+ Software Engineer, DevOps Engineer, Systems Administrator, Database…
Added 13 mins ago
Sentinel - Systems/Principal Systems Engineer - Support Systems Integration
Northrop Grumman
Colorado Springs, CO
Northrop Grumman Defense Systems is seeking to hire a Systems Engineer / Principal Systems Engineer – Support Systems Integration (Level 2 or Level 3) to join its team. This position is in…
Added 13 mins ago
Sentinel - Systems/Principal Systems Engineer - Support Systems Integration
Northrop Grumman
Colorado Springs, CO
Northrop Grumman Defense Systems is seeking to hire a Systems Engineer / Principal Systems Engineer – Support Systems Integration (Level 2 or Level 3) to join its team. This position is in…
Added 13 mins ago
Software Engineer II, Analytics Amazon Dedicated Cloud (ADC)
Amazon
Denver, CO
…innovating new ways of building massively scalable distributed systems and delivering the next generation of cloud computing with AWS offerings like Athena, LakeFormation, Redshift,…
Added 13 mins ago
XE
Distribution Planning Engineer (Entry, Staff, Senior, or Principal)
Xcel Energy
Denver, CO
- $70,000 to $156,600 USD / year
The job summary below and responsibilities reflect the senior engineer level role. The successfully chosen candidate will be placed at a level that is commensurate with their skills and…
Added 28 mins ago
General Engineer
Department Of Energy
Morgantown, WV
Summary This position is part of the Office of Legacy Management, Department of Energy. As a General Engineer, you will serve as an expert advisor providing strategic leadership for major…
Added 28 mins ago
Senior Staff Engineer - Agentic Identity
Cisco
Charleston, WV
…software that protects and powers the next generation of AI…
Added 31 mins ago
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Principal Core Infrastructure Engineer
Oracle
Seattle, WA · Santa Clara, CA · Redwood City, CA
- $114,600 to $234,600 USD / year
Leads development and begins architecting components of scalable, elastic distributed systems. Defines and enforces scalability requirements for owned components; optimizes code and data…
Added 35 mins ago
Network Security Engineer
nVent
Bangalore, IN
We are looking for a hands-on Network Security Engineer to operate, enhance, and support enterprise network segmentation and access-control solutions, with a focus on secure and reliable…
Added 50 mins ago
Senior Elastic Stack Data Integration Engineer IRES - SSFB/HSV
Amentum
Redstone Arsenal, AL
Position Title: Senior Elastic Stack Data Integration Engineer

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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