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Founding Engineer – Real-Time Voice AI

RnB Consultancy H-1B Information Technology Full-timeSan Francisco, CA $150,000 - $275,000 a year
Posted Oct 2, 2026 · Expires Oct 24, 2026
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Quick facts

Pay
$150,000 - $275,000 a year
Type
Full-time
Location
San Francisco, CA
Skills
Python, Kubernetes
Industry
Information Technology — 671 open jobs
Visa in listing
H-1B
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Free to apply — never pay anyone for a job offer or visa sponsorship

Job description

Got strong opinions on how a real-time AI system should be built, and the itch to rebuild what's wrong?

A YC-backed startup is automating the borrower side of US mortgage lending with AI voice and SMS agents. They handle payments, escrow questions, loan qualification and collections for several of the ten largest US mortgage lenders, with every call checked for compliance (FDCPA, RESPA, TILA). $1B+ in payments processed so far, and the team will roughly triple by year-end.

The official title is Member of Technical Staff, but in practice you're a founding engineer, leaning infra and backend. They're looking for the engineer who walks in, forms a view on how the product should really be built, and starts rebuilding it.

They're hiring 4 founding engineers.

What you'll own

  • The core systems behind real-time voice AI and compliance workflows
  • Keeping latency under 700 ms with event-driven design and parallelism
  • Running and scaling fault-tolerant services on Kubernetes
  • An AI system that learns from each customer conversation and from human feedback, and keeps getting better
  • Taking designs from the whiteboard to production inside banks' own environments
  • Setting the engineering standards for the team that's coming

What you bring

  • 3+ years of professional engineering, with strong Python fundamentals
  • You've designed production backends yourself, rather than only adding features to an existing stack
  • Distributed systems, reliability and fault tolerance are second nature; you're excellent at database design and performance tuning
  • Strong architectural opinions, and the backbone to rebuild what's broken (and defend why)
  • You take ownership when things are fast and chaotic
  • AI-native in how you work
  • Genuine curiosity about mortgage and lending
  • Based in SF or ready to relocate right away; 5 days a week in person

Where you might come from

  • Distributed systems or low-latency backend at high-bar infra and data companies (databases, streaming, search, vector stores, cloud compute layers)
  • AI or voice infrastructure: production infra at AI labs and inference platforms, voice AI and telephony infra, sub-second systems
  • Founder or founding engineer at a startup with serious backend architecture
  • Infra teams at fast-moving AI startups, regulated vertical AI or lending tech
  • Big-tech infra, with clear zero-to-one signal

Bonus points

  • Kubernetes and event-driven, parallel architectures in production
  • Low-latency systems where every millisecond counts: voice AI, high-frequency trading, ad tech, real-time bidding
  • Regulated production environments (SOC 2, PCI, HIPAA, or lending rules like FDCPA, RESPA and TILA)
  • Real-time media, telephony or voice infra

What's in it for you

  • $150k–$275k base
  • Founding-engineer scope: the architecture is yours to shape
  • Visa: H-1B transfer, TN and O-1 supported

Good to know

  • Full-time, 5 days a week in the San Francisco office
  • Process: 15-min call with the CEO 1-hour live coding 1-hour design session (how you'd architect a real-time, distributed system, keep it reliable and make the database fast) half-to-full-day onsite
  • offer

Does this sound like you? Apply now. If you're a match, we'll be in touch within 3 working days.

RnB Consultancy | Netherlands | 3604 AB Maarssen | KvK 71489703

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Visa sponsorship record

No public sponsorship records found

We didn't find H-1B, H-1B1, E-3 or green card (PERM) filings under the name RnB Consultancy in the Department of Labor and USCIS data. That doesn't mean the job can't be sponsored — the company may file under a different legal name, be new to sponsorship, or sponsor a visa that isn't in these datasets (for example H-2B or J-1).

Tip: ask the recruiter early, in writing, which visa they sponsor and whether they cover the legal and filing fees.

Which visas can work for this job

Occupation: Engineers, All Other (SOC 17-2199) — estimated from the job title.

  • Mentioned in the listing

    H-1B

  • H-1B cap-exempt employer

    Regular cap-subject employer — a new H-1B needs to win the lottery in March (unless you already hold cap-counted H-1B status).

  • TN (citizens of Canada and Mexico)

    This kind of role may fit the USMCA profession “Engineer” — it depends on the actual duties. No lottery, no cap; you need the matching degree or license.

  • E-3 (Australia) and H-1B1 (Chile, Singapore)

    Same degree requirement as H-1B, but no lottery and a separate quota that is rarely filled.

  • O-1 (extraordinary ability)

    For candidates with awards, publications, press, a high salary or critical roles at distinguished organizations. No cap, no lottery; the employer files a petition.

  • STEM OPT extension (F-1 students)

    Requires an E-Verify employer. We didn't find this company in the E-Verify list — ask HR.

Salary vs prevailing wage

Prevailing wage data for this occupation and location isn't loaded yet.

Sources: U.S. Department of Labor OFLC disclosure data (H-1B/H-1B1/E-3 LCA, PERM), OFLC prevailing wage data, USCIS H-1B Employer Data Hub, E-Verify participating employers. Employers are matched by name, so records of companies with similar names can occasionally be mixed up. This is general information, not legal advice — talk to an immigration attorney about your case.