Senior Software Engineer; Backend​/Fullstack

About Luthor Luthor builds AI-powered marketing compliance agents for fintechs, banks, investment advisors, and broker-dealers. Our AI streamlines approvals, helping teams publish content faster—without compliance bottlenecks. In regulated industries, every piece of marketing—tweets, Linked In posts, blogs—requires compliance approval, often delaying go-to-market by weeks. These slowdowns cripple growth. We’ve found that 60-75% of compliance checks can be quickly automated with AI.

The challenge now is achieving a model with 95%+ accuracy, and that’s what we’re building. Our vision is to be the marketing compliance layer for the entire internet. Today, Luthor is already trusted by leading firms with $5.7B+ in AUM, backed by strong capital, and growing fast. Join us at the ground floor.

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. You'll interface directly with our customers and prospects to gather feedback to develop novel solutions to the unique problems they face around marketing compliance. 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.

• Ship to production on day one.
• Develop backend logic for performance and scalability for frontend requests.
• Design robust data models and manage databases.

• Build integration and product infrastructure for LLMs. Provide Luthor agents with the infrastructure, data sources, and tools they need to automate workflows for financial compliance teams.
• Lead customer calls to gather feedback and refine backend features.

• Own customer outcomes and success. Continue shipping value, not just code.
• Lead architectural decisions to scale our services across geographies, tech stacks, and business types.
• Hire, onboard, and nurture future backend teammates.

• Ruby on Rails
• Postgres
• React
• Docker

• Customer-obsessed — You’re driven to deeply understand customer pain points and solve real problems, engaging directly to make an impact.
• Experienced in Fast-Growth B2B – You’ve built and scaled high-performing software products, shipping fast and often. Bonus if you have experience in fintech or enterprise SaaS.
• Entrepreneurial & Self-Driven – You take ownership, thrive in ambiguity, and execute without waiting for direction. You simplify solutions and get things done.
• Strong Communicator – You’re proactive in sharing feedback, adaptable to change, and comfortable pitching product ideas in a fast-moving startup environment.
• Future Founder – You aspire to build your own company one day and want firsthand experience at early-stage startup. We support ambitious builders and may even fund your venture in the future.

• $120k - $180k based on experience
• Generous equity
• Commuter/travel benefit
• Paid team vacations
• Health, vision, dental