Full-Stack Engineer (Backend) - Remote

About the Job

Willow Processing is seeking a Full-Stack Software Engineer (Backend-Leaning) to help modernize its loan processing systems and build integrations with lending partners.

This is a fully remote opportunity for an experienced software engineer who is comfortable owning projects from initial design through deployment and monitoring. The role has a strong backend focus, while also involving frontend development and AI-powered workflow automation.

You'll work closely with a small team and operations staff to build reliable software that supports real lending operations and financial transactions.

Key Responsibilities

• Own software features end to end, including scoping, designing, developing, deploying, and monitoring.
• Build backend services and APIs for lending partners.
• Develop and improve web interfaces used by internal staff and customers.
• Create AI-powered automation for internal workflows, incorporating appropriate safeguards and human review.
• Migrate data and business logic from legacy systems without disrupting live operations.
• Collaborate with engineers and operations teams on larger projects.
• Make independent technical decisions and maintain progress in a fast-paced environment.
• Ensure APIs and backend systems are reliable, observable, and secure.

Required Qualifications

• At least 3 years of professional software engineering experience, with a strong backend focus.
• Experience with TypeScript/Node.js or Python.
• Solid frontend development skills using modern frameworks such as React or Next.js.
• Production experience designing and operating APIs, including authentication, idempotency, retries, and observability.
• Strong knowledge of relational databases and data migration.
• Hands-on experience with AI tools and technologies, including LLM APIs, prompt design, tool use, or agent workflows.
• Ideally, experience implementing AI solutions using Python.
• Good technical judgment, particularly when determining where AI systems require additional checks and human oversight.
• Demonstrated ability to take projects from concept to production.
• Strong collaboration and written communication skills.
• Comfort working independently in a remote environment with ambiguity and changing priorities.

Preferred Qualifications

• Experience shipping AI-powered features into production.
• DevOps experience, including CI/CD, infrastructure as code, and deployment automation.
• Background in fintech, lending, or mortgage technology.
• Experience working in startups or small engineering teams.

Technical Skills

• Backend: TypeScript, Node.js, Python
• Frontend: React, Next.js
• APIs: Authentication, idempotency, retries, observability
• Databases: Relational databases and data migration
• AI and Automation: LLM APIs, prompt engineering, tool use, agent workflows
• DevOps: CI/CD, infrastructure as code, deployment automation

Compensation

Annual Salary: $85,000–$95,000.

Work Location and Employment Details

• Location: United States.
• Work Arrangement: Fully Remote.
• Employment Type: Not specified.
• Work Authorization: Open to candidates based in the United States who are authorized to work without employer sponsorship.

Interview Process

The selection process consists of three stages:

1. Initial Screening: A 15-minute screening call.
2. Technical Interview: A one-hour discussion involving situational questions about real-world engineering challenges. No live coding or take-home assessment.
3. Final Interview: A conversation with the company's founder.

How to Apply

Apply through LinkedIn and answer the screening questions honestly. Willow Processing reviews applications directly.

Shortlisted candidates will receive a few written questions by email. Applicants should ensure that their email address on their LinkedIn profile is current.