Senior Software Engineer

Rillet serves accounting and finance teams. Our customers are the financial brains of their companies. Our job is to help them run the numbers with impossible speed, accuracy, and insight.

Rillet is an AI-native ERP that can drive a zero-day close. We are different because of our unified source-of-truth data model, hundreds of best-in-class native integrations (Stripe, Ramp, Salesforce, etc), automated & auditable workflows, multi-entity consolidation, and quickly expanding army of specialized AI agents (e.g., accrual, audit, P&L flux, board decks, etc). These earn us a consistently perfect customer satisfaction score. High-growth AI customers like Mercor, and Function Health love our ship velocity, because their financial stack needs to scale as quickly as they do.

This huge market is ours to take. We have raised $100M from leading investors (including Sequoia, a16z, Iconiq, Oak HC/FT, and First Round) to help everyone run their numbers at the speed of AI.

Rillet’s pace is not for everyone. Intelligence is table stakes. To succeed here, you need extreme speed, agency, and flexibility.

Successful Rilleteers do not wait for assignments. They internalize a mission, design a strategy, and bring back results that are better, faster, and more creative than a manager could have asked for.

Work revolves around our customers. Successful Rilleteers are energized by delivering the most important things, even those that weren’t in the original plan.

In this role, you do not need to be an accountant. But you do need to appreciate the value that our customers can create for their own company when we equip them with the perfect financial tools. Successful Rilleteers love powering the financial core of the world’s fastest-growing companies.

We're looking for an experienced engineer to take on meaningful ownership across Rillet's product and technical stack. You'll work closely with our CTO, product, and design to build industry-defining accounting and finance software, shaping not just what we ship but how we build as an engineering organization.

We're an AI-native company, and we expect our engineers to bring that same mindset to how they work. If you're energized by using AI to move faster and solve problems differently, you'll fit right in.

We're looking for teammates within commutable distance of our NYC or San Francisco offices (or willing to relocate). Team members work in-office Tuesdays and Thursdays, plus one additional flexible day.

• Own features and systems end-to-end across the full stack, from backend architecture to the interfaces users interact with every day.

• Partner with product, design, and finance experts to shape what we build, advocating for the right technical tradeoffs and keeping the customer perspective central.

• Set the bar for engineering quality: continuous delivery, test-driven development, production reliability, and a culture of ownership.

• Mentor engineers on the team through code reviews and hands-on collaboration, raising the technical bar across the org.

• 5+ years of software engineering experience with a track record of leading large-scale projects and architecting scalable systems

• Backend-focused fullstack engineer with proficiency in Kotlin, Java, or other JVM languages; TypeScript experience a plus

• Comfortable driving technical decisions and making hard tradeoffs under pressure

• Actively incorporates AI tools into your day-to-day workflow, not just as a productivity shortcut but as a way to tackle problems differently

• Strong product instincts and a habit of thinking about user impact, not just technical correctness

• Energized by building in a fast-moving environment where the playbook is still being written

• Background in fintech, ERP, or accounting software

• Prior experience working in a high growth startup

• Experience with modern web frameworks and TypeScript

• Familiarity with CI/CD, observability tooling, and production reliability practices

• Competitive Pay & Benefits: Backed by world-class investors, we offer strong salaries plus equity so you share in our success. We've got you covered with top-tier health and dental insurance, premiums partially or fully covered for you, plus 90% coverage for dependents.

• Room to Grow: We're building a team of ambitious, high-performing people who will grow with the company. As Rillet scales, so will your role, responsibilities, and compensation.

• Flexibility That Works: Take the time you need with flexible PTO and 9 company-wide holidays. We value both the flexibility of remote and hybrid work and the creativity and energy that comes from in-person collaboration at our hubs in San Francisco, NYC, and Barcelona.

• Build Real Connections: Great work happens when people connect. Join us for team offsites in incredible locations, our team has bonded everywhere from New York and San Francisco to Toronto, Italy, France, and beyond.