Hygo Studio is Hiring: Payment & Billing Systems Engineer

Typical comp: $150,000–$260,000 (median $195,000)

Hygo Studio is hiring a Payment & Billing Systems Engineer to own its full payment stack — Authorize.net plus cryptocurrency rails (Solana, Ethereum, Polygon). This is the company’s highest-risk, least-covered system; the JD calls it explicitly. This page documents the role and the AIEH assessment bundle that backs candidate applications with calibrated evidence on what the JD actually screens for.

This is a real, open role at Hygo Studio (April 2026 listing). Apply at hygo.com/#careers, or take the AIEH bundle below and share your Skills Passport URL alongside your application.

What Hygo is looking for

From Hygo’s job description:

Studio runs on subscriptions (Free/Pro/Max) with credits, multiple payment processors, and async billing reconciliation. This is our highest-risk, least-covered system — billing bugs directly impact revenue and generate the majority of support escalations. We need a dedicated owner who has been in the trenches of real payment processing.

Non-negotiable requirements (Hygo’s emphasis, verbatim):

You must have direct, hands-on production experience with Authorize.net — Accept Suite, Advanced eCommerce (AIM), ARB (Automated Recurring Billing), CIM (Customer Information Manager), or Transaction Reporting APIs. This is not a “nice to have.” If your payment experience is limited to drop-in hosted checkout widgets, this is not the right fit.

You must have personally built a production payment system end-to-end that processed real transactions from real users — not inherited, not maintained, but architected and shipped. You understand the full lifecycle: tokenization, authorization, capture, settlement, voids, refunds, chargebacks, and reconciliation.

Plus: 3+ years payment systems in production, deep understanding of subscription state machines, financial reconciliation experience, strong Node.js/TypeScript backend fundamentals, async job processing (Temporal preferred). Bonus: crypto payment integration, PCI-DSS compliance, NestJS.

Tech stack: Authorize.net, Solana/Ethereum/Polygon Web3 libraries, NestJS, Temporal, PostgreSQL, Redis, TypeScript.

How AIEH maps this role to a Skills Passport bundle

FamilyRelevanceWhy it matters here
JavaScript Fundamentals0.85TypeScript backend depth — testing language gotchas (closure scope, async ordering, type coercion) that produce the kinds of bugs that move money in the wrong direction.
Cognitive Reasoning0.80Subscription state machines are graph-traversal problems with edge cases that break under partial failure. The JD calls out “webhook race conditions, partial failures, duplicate events, expired cards, processor retries” — all cognitive-load-heavy reasoning under uncertainty.
Big Five Personality0.75High Conscientiousness is the personality factor that most predicts the financial-systems paranoia the JD demands. The trait predicts attention to detail, methodical verification habits, and resistance to “ship it and see” instincts when real money is at stake.
Situational Judgment0.70”Document rationale clearly” + “comprehensive test coverage for payment flows” + “implement fraud detection rules” all involve judgment calls under tradeoffs (false positives vs. false negatives, latency vs. verification depth).

Pillar weights for this role

  • Domain: 0.50 — heaviest weighting in the AIEH catalog. The JD’s non-negotiables (Authorize.net production experience, end-to-end payment system architected by you) are pure domain. AIEH cannot test Authorize.net specifically (vendor-specific knowledge), but the JS Fundamentals + Cognitive Reasoning families test the underlying language and reasoning that gate Authorize.net competence.
  • Cognitive: 0.30 — bumped above default because subscription state machines and webhook race conditions are cognitive-load problems where raw reasoning ability predicts who catches the bug before it ships.
  • AI fluency: 0.10 — minimal weight; this role isn’t where AI features ship. Cut from default 0.25.
  • Communication: 0.10 — the JD focuses on systems work; communication matters at the team level but isn’t the primary screen here.

The composite score on the 300-850 calibrated scale is what Hygo can compare candidates on. A high domain score combined with high Conscientiousness from Big Five is the strongest passport signal for this role.

Two ways to apply

Apply directly: visit hygo.com/#careers and follow Hygo’s application flow.

Apply with an AIEH Skills Passport: take the bundle above (start with the free Big Five sample or JavaScript Fundamentals sample). Share your passport URL alongside your hygo.com application — Hygo can verify your calibrated scores without needing to set up a separate vendor account.

What AIEH cannot test (Hygo screens directly)

  • Authorize.net production experience — vendor-specific. The JD says this is non-negotiable. AIEH’s bundle proves you have the underlying language + reasoning + personality fit; the Authorize.net experience is evaluated from your résumé and interview.
  • End-to-end payment system you architected — portfolio + reference question. Bring detailed write-ups of payment systems you’ve shipped, including the lifecycle stages: tokenization, authorization, capture, settlement, voids, refunds, chargebacks, reconciliation.
  • PCI-DSS compliance work — credentialed/portfolio-evaluated.
  • Cryptocurrency payment integration (Solana, Ethereum, Polygon) — bonus in the JD; show prior production work.

The JD also asks all applicants for: example links to live production work owned end-to-end, rough traffic/usage metrics, and an estimate of how much LLM/coding-agent contribution went into those examples.

Prove you're ready for this role

Take these AIEH-native assessments to add evidence to your Skills Passport:

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