Founding Engineer (In-Person)

Raycaster; New York (NY); On-site; USD 150,000 - 200,000; Full time

Benefits offered by this job

Competitive base salary

Founder-level equity

In-person in NYC, five days a week

Job summary

A tech startup in AI development in New York seeks a talented software engineer. The role involves maintaining core systems, building reliable end-to-end products, and addressing customer pain points through development. The ideal candidate has experience with distributed systems, a strong foundation in Go or Rust, and a keen sense of user experience. This position offers competitive compensation and founder-level equity, with a collaborative in-person work environment.

Qualifications

• Proven ability to build and ship complex systems.
• Experience with AI/LLM features in production.
• Ability to quickly learn new technologies.
• You have high attention to detail + high standards
• You have product taste: you notice UX/copy/states, not just code
• If you don’t know something, you figure it out in hours - not weeks

Responsibilities

• Maintain core agent orchestration and document pipelines.
• Build end-to-end systems with Go backend and React UI.
• Turn customer pain into swift product iterations.
• Turn customer pain into product fast (you’ll talk to users)

Skills

Distributed systems

Concurrency

Go

Rust

User experience design

Attention to detail

Job description

What You’ll Do

• Maintain the core: agent orchestration + document pipelines + versioning
• Ship end-to-end: Go backend + React UI (you’ll touch everything)
• Make it reliable: evals, guardrails, observability (no demo-only systems)
• Turn customer pain into product fast (you’ll talk to users)

What We Care About

• You’ve built and shipped real systems (Go/Rust preferred). You can own a subsystem.
• You’re strong on fundamentals: distributed systems, concurrency, performance
• You’ve shipped AI/LLM features in production, and you learn new things insanely fast and can prove it
• You have high attention to detail + high standards
• You have product taste: you notice UX/copy/states, not just code
• If you don’t know something, you figure it out in hours - not weeks

Nice to Have

interest in biotech, healthtech, or any regulated industry

Research Angle (optional)

We’re working on agent / domain-specific evals, new embeddings and indexing benchmarks, and may publish benchmarks / deep dives and submit to conferences / journals. If you want to help set standards for this space, there’s room.

Logistics

• NYC, in-person, 5 days/week (we build better together)
• Competitive base + founder-level equity (2–10%)

Apply

Send (1) GitHub / past systems you built, and (2) one paragraph on why you’re interested in working at Raycaster to founders [at] raycaster.ai