Full-Stack Software Engineer (Backend-Leaning) | Fully Remote | Willow Processing

Willow Processing is modernizing its loan processing systems and building integrations with lending partners. The Full-Stack Software Engineer will own features from design through production, build backend services, APIs, and web interfaces, and develop AI-powered internal workflow automation.

Responsibilities:

• Own features end to end: scope, design, build, ship, and monitor
• Collaborate with teammates and operations staff on larger efforts
• Build backend services and partner-facing APIs
• Build and improve the web interfaces our staff and users rely on
• Build AI-powered automation for internal workflows, with the guardrails and human review around it
• Migrate data and logic from legacy systems without disrupting live operations
• Make good technical decisions on your own and keep work moving without waiting for direction

Requirements:

• 3+ years of professional software engineering with a strong backend focus, ideally TypeScript/Node or Python
• Solid frontend skills with a modern framework like React or Next.js
• Production experience designing and operating APIs (auth, idempotency, retries, observability)
• Strong relational database and data migration skills
• Hands-on experience building with AI tooling (LLM APIs, prompt design, tool use, or agent workflows), ideally in Python, and sound judgment about where AI needs checks
• A track record of owning work from idea to production, and of collaborating well when the work is shared
• Comfort with ambiguity, a fast pace, and clear written communication in a remote team
• This role is open to candidates based in the United States who are authorized to work here without sponsorship
• Shipped AI features in production
• DevOps experience (CI/CD, infrastructure as code, deployment automation)
• Fintech, lending, or mortgage experience
• Startup or small-team background