Position: Lead Senior Engineer (Ruby on Rails)

Job Title: Lead Senior Engineer (Ruby on Rails)

Location: Bay Area (Relocation Required)

About:

Luthor is an AI-powered copilot for marketing compliance. We scan all your marketing content in real-time to flag risky language and suggest fixes, ensuring you adhere to regulations from agencies like the FTC, FDA, and SEC. With Luthor, you can manage your marketing efforts confidently, knowing your content remains compliant.

We’re not just building a platform—we’re creating tools that blend cutting-edge AI with seamless usability to empower creativity vision includes becoming the go-to leader in AI-driven tools for Ruby developers.

We’re well capitalized and growing fast. Get in on the ground floor.

About the Role

As our first full-time engineering hire, you’ll work directly with the CEO and CTO (both engineers) to design and build the backbone of our platform. This is startup life in its truest form: fast-paced, challenging, and immensely rewarding. You’ll take ownership of your work, see the immediate impact on customers, and help define the engineering culture for years to come.

What It Will Be Like

• It will be hard, but incredibly rewarding.

• You’ll ship software quickly and see how it directly impacts our customers’ daily lives.

• Timelines will shift, priorities will change, and ambiguity will be constant—you’ll need to embrace the chaos and find clarity in the unknown.

• You’ll work closely with the founders, wearing many hats and taking ownership from idea to execution.

• You’ll learn a ton along the way, grow your skills, and help build something that truly matters.

What You’ll Do

• Architect, develop, and maintain scalable backend systems using Ruby on Rails, Stimulus, Hotwire, and Tailwind CSS.

• Ship features quickly while balancing clean, maintainable code.

• Collaborate with writers, editors, and strategists to build tools that transform their workflows.

• Build and optimize APIs to seamlessly integrate front-end and back-end systems.

• Own features end-to-end, iterating based on real-world feedback.

• Help establish the engineering culture, best practices, and technical direction.

• Contribute to our mission of becoming a leader in AI-driven tools for Ruby developers.

What We’re Looking For

• Several years of professional experience as a software engineer, with expertise in Ruby on Rails, Stimulus, Hotwire, and Tailwind CSS.

• Startup experience or a passion for working in fast-paced environments where priorities can shift.

• A shipping mentality:
You thrive on delivering functional solutions quickly and iterating for improvement.

• Interest or experience in AI tools and platforms. Open Ai Api, LLMs, embed dings, Pgvector

• An autonomous mindset—you can take vague requirements and turn them into reality with minimal guidance.

• A passion for solving complex problems that have a real-world impact on users.

• Excitement to work in a scrappy, high-energy team environment where you’ll wear many hats.

Why Join Luthor.ai?

• Mission-Driven Work: Build tools that empower creative teams and redefine content marketing.

• Ownership and Impact: As the first full-time engineer, you’ll shape not just the product, but the company itself.

• Work Closely with Founders: Collaborate directly with the CEO and CTO, both engineers deeply involved in the tech.

• Roller coaster Startup Culture: Fast-paced, high-growth, and full of opportunities to learn and grow.

• Competitive Compensation: $120,000–$170,000 per year, based on experience, with equity opportunities.

• Cutting-Edge Technology: Be part of a team that blends AI and development tools to create something truly innovative.

• Growth Opportunities: Help build the engineering team and define the company’s technical direction.

To Apply

Send your resume and a brief note about the most impressive project you’ve ever built — Let’s create something amazing together!
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