Founding Engineer at Finta in San Francisco, CA, US

Job description

• About Finta
• Have you tried renewing a driver’s license online? The site looks stuck in 2000, it is confusing and slow. That is how most accounting and tax software still feels. The space is crowded with sales teams who rely on fear to close deals, and the result is bad experiences justified by “compliance.”
• Finta is changing that. We automate bookkeeping, file taxes quickly and compliantly, and give companies real-time financial metrics. Our goal is simple: to remove the manual, tedious parts of finance so that smart people can focus on hard problems.
• We raised $2M from Y Combinator, Mercury’s CEO, leaders at Mercury, Brex, and Ramp. Since launching in 2023, we have grown organically through word of mouth and now serve hundreds of paying customers. See what they say at www.finta.com.

Responsibilities

• Ship secure, fast, and scalable production code across the stack.
• Collaborate directly with the CEO and designer to deliver complete product features - backend to frontend.
• Work with our modern, opinionated stack: Ruby on Rails, React, Stimulus, Tailwind, Redis, and more.
• Build and maintain banking and accounting integrations with rigorous data-quality and reliability standards.
• Continuously improve testing, observability, security, and deployments on Render.
• Work asynchronously with minimal meetings - we trust you to manage your time and ship great work.

Requirements

• Have 4+ years working with server-side rendered Rails apps in production
• You regularly use AI coding tools (e.g., Cursor, Claude Code, Codex) to ship production code and can show real examples of leveraging them effectively.
• Thrive in async, ownership-driven environments.
• Prefer simple, pragmatic solutions over clever abstractions.
• Take pride in solving hard problems, writing efficient code, and shipping polished, end-to-end features.

Skills

Required

• Ruby on Rails
• Server-side rendered Rails apps
• Async work
• Ownership
• Pragmatic solutions
• Problem-solving
• Efficient code
• End-to-end features

Benefits

• Ship consequential work used by hundreds of startups\
• Join a small, mission driven team that values craft and user experience
• 10+ years of runway backed by top investors
• Real ownership of architecture, quality bar, and early hiring
• Modern stack: Ruby, Postgres, Rails, Render, Tailwind
• $150k–250k base plus 5% equity
• Visa sponsorship and relocation support available
• Medical, dental, and vision insurance
• Meals, gym membership, professional education benefits
• In-person company offsite every year