Senior Software Engineer, Agents - RevenueCat

About RevenueCat

RevenueCat gives app businesses the infrastructure and tools to build, run, and improve their monetization. Since graduating from YC's S18 batch, we've grown into the default monetization platform for mobile.

We're in 50%+ of newly shipped subscription apps, we process $16B+ in annual purchase volume, and we help everyone from a solo developer to the OpenAI mobile team understand and grow their revenue.

We're a remote-first team of 150+ people across 25+ countries, guided by values we actually practice: Customer Obsession, Always Be Shipping, Own It, and Balance.

The Role

RevenueCat helps app developers manage subscriptions and make more money from them. We built two AI agents to do that heavy lifting: Rico, who watches over your subscription business, answers questions, and safely performs actions; and Astra, a specialized agent to build and edit paywalls.

This is a role for engineers who've built advanced agents that do actual work, not just a thin wrapper around an LLM. You'll ship agentic features to thousands of developers, and you’ll shape the foundation everything else runs on: orchestration, tool execution, context management, evaluation, and human-in-the-loop controls.

About You

• You have 8+ years of experience shipping production systems.
• You've built agents that other people actually use and the systems around them: tool use, structured output, context management, evaluation, orchestration.
• You have strong backend fundamentals and have built reliable, observable, and secure systems.
• You hold a high bar for quality and instinctively know which details matter, while knowing how to cut scope to deliver value.
• You’re customer-obsessed and think like the developer, product manager, or marketer using the feature.
• You’re a builder, not an implementer: scoping, prioritizing, and driving rollout in partnership with our Product team.
• You can quickly familiarize yourself with code you didn't write yourself and improve it.
• You’re scrappy, biased toward shipping, and comfortable with ambiguity.
• You communicate clearly, both in real-time and asynchronously.
• You act like a founder: notice problems, propose improvements, and follow through fast.
• You are curious, stay current on AI tools and practices, and share what you learn with others.

Ideally, you have:

• Familiarity with subscription business models, app stores, or developer tools
• Experience with OpenAI/Anthropic APIs specifically
• Experience with observability frameworks (Langfuse, Langchain, etc.)
• Built Slack integrations
• Contributed to open source AI/ML tooling
• Maintained systems at scale

What We Offer

• Competitive equity in a fast-growing, Series C startup backed by top-tier investors, including Y Combinator
• 10-year window to exercise vested equity options
• A fully remote environment designed around autonomy and flexibility
• 4-5 weeks of flexible time off annually
• Paid desk at a coworking space
• Workspace budget and continuous learning stipend