Job Details

Who is Recruiting from Scratch: Recruiting from Scratch is a specialized talent firm dedicated to helping companies build exceptional teams. We partner closely with our clients to deeply understand their needs, then connect them with top-tier candidates who are not only highly skilled but also the right fit for the company's culture and vision. Our mission is simple: place the best people in the right roles to drive long-term success for both clients and candidates.

Title of Role: Senior Backend Software Engineer
Location: San Francisco, CA (On-site)
Company Stage of Funding: Hyper-Growth, Highly Profitable Private Company
Office Type: On-site, Full-Time
Salary: Competitive (based on experience) + EquityCompany Description

We're representing one of the fastest-growing companies in the world, scaling from $1M to $500M in revenue run rate in just 17 months - with growth accelerating weekly. The company builds AI-driven models that evaluate candidate performance potential more effectively than human recruiters, and their technology is trusted by the top 5 global AI labs.The engineering team is small, profitable, and scaling quickly, providing outsized opportunities for impact, ownership, and leadership from day one.What You Will Do

As a Senior Backend Software Engineer, you'll own and deliver high-impact projects that power the workflows of some of the world's most advanced AI organizations. You will:

• Design, build, and scale production-grade backend APIs, services, and infrastructure.
• Lead system design and architecture decisions for mission-critical workflows.
• Mentor and guide junior engineers through code reviews, design sessions, and pair programming.
• Partner with Product and Design to ship features quickly while maintaining quality and scalability.
• Anticipate bottlenecks, propose scalable solutions, and improve system reliability.
• Contribute to systems enabling leading AI labs to train, test, and evaluate their models.

Ideal Background

• Strong coding fundamentals (Python preferred, but language-agnostic hiring process).
• Deep understanding of distributed systems, scalability challenges, and system design.
• Experience shipping production systems at scale in high-growth or high-stakes environments.
• Ability to reason about trade-offs between speed and reliability in decision-making.
• Strong communicator, able to align technical execution with business goals.
• High ownership mindset, curiosity, and bias toward delivering simple, pragmatic solutions.

Why Join

• Impact: Your work directly powers the infrastructure behind the world's leading AI labs.
• Learning: Gain early insights into frontier AI capabilities months ahead of the market.
• Growth: Work on both infrastructure and research-adjacent projects with a fast path to technical leadership and ownership.

Compensation and Benefits

• Salary: Highly competitive (commensurate with experience)
• Equity: Generous early-stage equity package
• Work Setup: On-site in San Francisco
• Other Benefits:
  • End-to-end project ownership in a hyper-growth company
  • Direct collaboration with senior engineers in a high-performance culture
  • Opportunity to shape both engineering systems and company culture

This role is perfect for senior backend engineers who thrive on system design, scalability challenges, and leadership opportunities - and who want to build the infrastructure supporting the world's most advanced AI research.

Salary Range:$130,000-$500,000 base.