Senior Software Engineer

About Heartbeat Heartbeat ( heartbeat.chat ) is a plug-and-play online community builder. Think “Shopify for online communities”. We’re building a world where people have the power to own & shape the way they engage with others online. Heartbeat allows creators, coaches, & online experts to build a thriving community business —with discussions, courses, payments, events, documents, workflows, matchmaking. directories& more —all on their own website. Why this job is special… You'll be one of the first engineers to join the company—but you're joining a product & codebase that works . We have hundreds of customers processing thousands of dollars every month. All the leverage and autonomy of being an early engineer without the burden of building everything from scratch. You get to work with people who know their craft. Everyone at Heartbeat is exceptionally skilled and brings deep experience from their previous roles. We take Typescript seriously. If you’re passionate about pragmatically applying type systems & functional patterns, this is the place for you. More about our approach AI agents are here & we're ready to use them as a force-multiplier. We've spent a lot of time building incredibly expressive & flexible application building blocks. AI will let us double down on these through MCP and agentic configuration, giving us the magic of tools like Replit & Lovable without the brittleness. What you'll do... Work closely with the team to scope & prioritize new features Write modular, maintainable, thoughtful code Create rails to enable AI coding agents to robustly make changes & develop new features Monitor our production environment and work with users to identify & resolve bugs You'll enjoy this role if you... Appreciate working with Typescript, type systems & functional patterns. More about our approach Enjoy writing high-quality code within the constraints of a rapidly changing product Want to have a strong influence on the direction of the product Thrive working in an autonomous environment Like creating new abstractions (responsibly!) Are not afraid to dive into unfamiliar technologies & platforms Some problems we've worked on... Improving the type safety we get from our database Efficiently matching community members via max weight matching & linear programming Abstracting our mobile app to allow for custom white-labeling What you might work on... Building the first version of the Heartbeat MCP server Reworking our frontend infrastructure to enable our communities to create SEO-indexable content Building a new community-centric voice & video call experience Optimizing our API server infrastructure and database queries to accommodate usage growth Establishing our app ecosystem to allow external developers to build custom apps within Heartbeat And much more! What we're looking for... A strong background working with Typescript or similar typed languages Experience with React or similar frontend component frameworks Experience scaling backend infrastructure & identifying performance bottlenecks Strong opinions about what well designed products feel like Intuition for balancing long-term engineering best practices and iterating quickly Empathy for users and the desire to carefully craft delightful user experiences A love for building & experimenting with products ️ Bonus points if you... Founded a company before Have experience with profiling & monitoring NodeJS in production Have experience building realtime applications Our Stack We love Typescript! Our entire stack is type-safe from the initial database call to the last React prop. Developer experience is a priority for us, and we're not afraid to spend time improving internal tooling if it will allow us to ship faster and/or better. Learn more about our approach here #J-18808-Ljbffr PetsApp