Full-Stack Engineer

About the role

A seed-stage construction lending fintech is looking for a Full-Stack Engineer with 6+ years of experience to join a small, high-velocity remote team. You'll work across the entire stack - from database schema design and API development to React front-end UI - extending and improving a mature, mission-critical Rails monolith that powers construction lending workflows. This is a hands-on, high-ownership role for a pragmatic engineer who thrives in ambiguity and is genuinely curious about domains outside their own expertise. Experience in construction, fintech, proptech, or any domain requiring deep business understanding is a strong plus. Visa sponsorship is not available ; candidates must have U.S. work authorization.

Responsibilities

• Collaboratively define, scope, and architect new platform capabilities on top of a 6-year-old Rails monolith serving mission-critical construction lending workflows
• Take ownership of extending and improving legacy systems - adding payments, integrations, and new features in a seamless, secure, and scalable way
• Write and optimize SQL, design schema migrations, and ensure API payloads are efficient and well-structured
• Develop and maintain web (React, Hotwire, TypeScript, Tailwind) and mobile-facing (React Native) features, ensuring platform alignment
• Manage background processing and job queuing (Sidekiq) to ensure system reliability without over-reliance on expensive vendor solutions
• Identify where legacy implementations need improvement and propose practical migration paths balancing engineering quality with business constraints
• Help establish engineering culture, conventions, and development practices as the team scales
• Serve as a technical leader and mentor others on the team
• Manage the end-to-end software delivery lifecycle, including testing, release management, and monitoring
• Communicate proactively in a fully remote, async-friendly environment - articulate your thinking, ask the right questions, and collaborate through conversation

Requirements

• Required (dealbreakers):
• 6+ years of full-stack software development experience in production environments
• Strong proficiency with Ruby on Rails , including extending and maintaining mature monoliths and legacy systems
• Experience shipping and maintaining production applications used by real customers
• U.S. work authorization - visa sponsorship is not available
• Also required:
• Proficiency with React, TypeScript, Tailwind, and Hotwire
• Experience with mobile frontend development using React Native
• Strong SQL and PostgreSQL experience, including schema design and migrations
• Experience with background processing and job queues ( Sidekiq )
• Hands-on experience with payments integrations and related API design, ideally within fintech, proptech, or construction lending
• Ability to architect platform capabilities, scope features, and make sound design decisions for scalable systems
• Comfort working cross-functionally and communicating problems and solutions clearly
• Strong problem-solving skills in ambiguous, fast-moving environments
• Compensation & Benefits
• Salary: $175,000 - $225,000 USD annually
• Fully remote work environment
• Location
• Fully remote. Preference for California-based candidates with availability during core hours of 10am-3pm MT . The team is headquartered in the Tempe, Arizona area.

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