AI Software Engineer, Backend (SF)

Loop; San Francisco (CA); On-site; USD 145,000 - 205,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

401(k) match

Paid time off

Paid holidays

Parental leave

Visa sponsorship available

Equal opportunity employer

Job summary

Loop is seeking an AI backend engineer in San Francisco to closely partner with founders and customers to address billing and payment pain points using AI. You will ship features that directly impact customers and build both AI-powered products and the systems that enable AI agents to work at scale.

You will craft data pipelines, schemas, and validation, write extensible code across frontend and backend boundaries, and participate in reviews and technical design discussions.

Qualifications

• Work in the SF office 4+ days a week.
• Two years of software engineering experience.
• Experience with TypeScript and tools such as GraphQL, Relay, React, and Node.js.
• Experience working at early-stage companies where you shipped products end-to-end and wore many hats.
• Excited to build with AI and apply it to real customer problems. No prior AI or machine learning background is required; you will learn our AI stack here.

Responsibilities

• Work cross-functionally with product, design, and sales to understand requirements and ship thoughtful solutions.
• Build and ship the AI harness: the data pipelines, schemas, validation, and feedback loops that let agents do work reliably at scale.
• Start from the outcome, not the process: curate the harness, data, and success criteria instead of the specific logic, then let agents write and validate it against real data.
• Write high-quality code optimized for extensibility, working across component boundaries from frontend to backend, infrastructure, and our AI stack.
• Engage in code reviews to maintain a high bar of engineering excellence.
• Lead discussions and documentation to communicate and arrive at the best technical design.
• Adopt AI technologies such as Cursor/Codex/Claude to accelerate software development and champion adoption of AI tools across the organization for increased productivity.
• Promote better practices, share technical knowledge, and help grow Loop through deliberate feedback on product, process, and culture.

Skills

TypeScript

GraphQL

Relay

React

Node.js

Tools

AWS

CDK

Fargate

ECS

Job description

Loop is industrializing services through AI, starting with one of the world's most complex industries: the global supply chain. We're an AI-native company built to solve the systemic data problem that's held logistics back for decades. Our Logistics Data Platform turns fragmented, unstructured data into a trusted foundation that fuels automation, financial clarity, and decision intelligence at scale. Today, Loop serves >20% of the Fortune 100, manages over $30B in supply chain spend, and helps its clients save hundreds of millions of dollars each year.

We recently closed a $95M Series C and are backed by leading investors including Valor Equity Partners, Founders Fund, 8VC, Index Ventures, J.P. Morgan, and more than 50 industry-leading angel investors.

Our team brings deep expertise from Uber, Google, Microsoft, Meta, Amazon, Flexport, C3 AI, VMware, Box, UPS, and C.H. Robinson and we're looking for builders who want to help shape what comes next.

About You

As an AI backend engineer, you will work closely with founders and customers to understand and solve their logistics billing and payment pain points. You will ship features that directly impact customers, and you will do it with AI in two ways: building products with AI, and building the systems that let AI agents and non-technical users deliver technical work that used to require an engineer. The most valuable work here solves a whole category of problems rather than a single one-off feature. You will face and solve many complex technical challenges while you receive guidance and feedback from the team. You will shape the Loop DNA and define how we grow as a company.

Responsibilities

• Work cross-functionally with product, design, and sales to understand requirements and ship thoughtful solutions.
• Build and ship the AI harness: the data pipelines, schemas, validation, and feedback loops that let agents do work reliably at scale.
• Start from the outcome, not the process: curate the harness, data, and success criteria instead of the specific logic, then let agents write and validate it against real data.
• Write high-quality code optimized for extensibility, working across component boundaries from frontend to backend, infrastructure, and our AI stack.
• Engage in code reviews to maintain a high bar of engineering excellence.
• Lead discussions and documentation to communicate and arrive at the best technical design.
• Adopt AI technologies such as Cursor/Codex/Claude to accelerate software development and champion adoption of AI tools across the organization for increased productivity.
• Promote better practices, share technical knowledge, and help grow Loop through deliberate feedback on product, process, and culture.

Qualifications

• Work in the SF office 4+ days a week.
• Two years of software engineering experience.
• Experience with TypeScript and tools such as GraphQL, Relay, React, and Node.js.
• Experience working at early-stage companies where you shipped products end-to-end and wore many hats.
• Excited to build with AI and apply it to real customer problems. No prior AI or machine learning background is required; you will learn our AI stack here.

Under the Hood

• Infrastructure: AWS, CDK, Fargate ECS
• Frontend: TypeScript, React, Relay, Ant Design, Vite, GraphQL
• AI: LLMs, prompt engineering, agentic workflows, and Loop's internal AI platform

Compensation and Benefits

The base pay range for this role is $145,000 to $205,000 annually. This range reflects the base pay that Loop reasonably expects to pay for the position at the time of hire. Actual compensation will depend on job-related factors, including experience, skills, qualifications, location, and business needs.

In addition to base salary, this role may be eligible for equity.

• health, dental, and vision insurance
• 401(k) match
• paid time off
• paid holidays
• parental leave

Loop may provide employment visa sponsorship for this role. Green card sponsorship may also be available based on business needs and eligibility requirements.

Loop is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other characteristic protected by law.