Senior Software Engineer

Cross Border Talents; San Francisco (CA); Hybrid; USD 170,000 - 230,000; Full time

Job summary

Cross Border Talents is hiring a Senior Software Engineer (Full-Stack) in San Francisco to join a small, lean team of ten engineers. The role centers on backend work, building scalable services that interface with LLMs and Generative AI models, and owning zero-to-one projects from MVPs to production.

We seek 5–10 years of backend-leaning full-stack experience, startup exposure, and a passion for healthcare.

Qualifications

• 5–10 years of experience in backend-leaning full-stack software engineering.
• Experience at an early-stage startup (Pre-seed to Series B).
• Strong demonstrated technical expertise and ability to move fast and explain code.
• Nice to have: healthcare or HealthTech AI interest.
• Demonstrated signal of excellence in education.

Responsibilities

• Build and ship complex backend services and infrastructure interfacing with LLMs and Generative AI models.
• Take ownership of zero-to-one projects, from prototyping MVPs to scalable production systems.
• Help scale existing products as the company expands to more organizations.
• Improve backend architecture, observability, and code quality standards.
• Collaborate with engineers and CTO in a flat structure.

Skills

Backend focus

Full-stack

Strong communication

Ownership

Startup experience

Education

Top university or equivalent

Tools

Python

TypeScript

React Native

React

MongoDB

AWS

Docker

PostgreSQL

Job description

Job Description

Senior Software Engineer (Full-Stack)

Employment Type: Full-time

Work Type: Hybrid

Location: San Francisco

Salary: $170K - $230K

About This Role

We are looking for a Senior Software Engineer with 5+ years of experience to join our small, lean team of ten engineers. We are seeking a candidate with a strong backend focus, startup experience (Pre-seed to Series B), and a passion for healthcare. This individual will be a core team member, taking on significant ownership to help scale our core services and build new Generative AI and LLM-driven workflows.

What Will You Be Doing?

• Build and ship complex backend services and infrastructure that interface with LLMs and Generative AI models.
• Take ownership of zero-to-one projects, from prototyping MVPs to hardening them into scalable, secure, and reliable production systems.
• Help scale our existing, widely adopted products as we launch to more organizations.
• Improve backend architecture, observability, and code quality standards.
• Collaborate within a flat engineering structure, working directly with other engineers and the CTO.

Role Details

Salary

• $170K - $230K

Equity

• 0.1-0.2%

Hybrid Work Policy

• 3 days in-person.

Visa Sponsorship Details

• Not open to any visas (e.g. US citizen, Green Card holders)

Employment Type

• Full-time position

Location

• San Francisco

Tech Stack

• Python
• TypeScript
• React Native
• React
• MongoDB
• AWS
• Docker
• PostgreSQL

Requirements

Role Requirements

Seniority

Required:

• 5 - 10 years of experience in backend-leaning full-stack software engineering.

Work Experience

Must have:

• Experience at an early-stage startup (Pre-seed to Series B).
• Strong demonstrated technical expertise (someone who can move fast and understand and explain their code).

Nice to have:

• Experience or demonstrated interest in healthcare or HealthTech AI.

Education

Required:

• Demonstrated "signal of excellence" (e.g., top 50 university, high-growth startup, leadership roles, robotics club).

Hard Skills

Must have:

• Strong proficiency in Python for backend development.

Nice to have:

• Experience with production LLMs or Generative AI.

Soft Skills

Required:

• Strong communication skills and ability to take high ownership.