We're looking for a Lead Engineer to join our Calendar Platform Builder Team, which is building the foundational infrastructure for the next generation of scheduling systems. This team is on a mission to enable businesses and developers to build flexible booking workflows across diverse industries, from salons and fitness centers to healthcare, education, sales, and rentals. We believe in Configuration over Code, empowering builders to define their scheduling logic, rules, workflows, and availability models without rewriting core logic.

As a Lead Engineer, you'll help architect and evolve this highly extensible platform. You'll drive cross-cutting initiatives, mentor engineers, and build backend components that other teams, partners, and customers rely on to build sophisticated scheduling systems on top of our infrastructure.

Responsibilities :

- Lead the design and development of core platform primitives, availability resolution, appointment lifecycles, time zone handling, and state-driven workflows.

- Architect a system that prioritizes configuration-driven behavior over hardcoded logic, enabling dynamic rule-based booking flows.

- Build scalable, composable services using NestJS, Redis, Firestore, MongoDB, PostgreSQL, and GCP services like Cloud Tasks, Scheduler, and Pub/Sub.

- Partner with product managers to translate industry-agnostic scheduling needs into developer-facing building blocks.

- Drive platform-wide consistency in API design, configuration modeling, error handling, and extensibility.

- Collaborate across engineering teams to ensure platform reliability, observability (Grafana/Prometheus), and maintainability.

- Mentor engineers and foster a strong culture of platform thinking, technical excellence, and high ownership.

Requirements :

- 6+ years of backend engineering experience, with at least 2 years in technical leadership roles.

- Experience with node.js or nest.js .

- Deep experience designing platforms, frameworks, or extensible APIs used by other developers.

- Hands-on expertise in distributed systems, asynchronous processing, and scalable microservices.

- Experience balancing developer flexibility with system guardrails, strong grasp of "configuration over code", and platform product thinking.

- Strong system design, data modeling, and observability practices, especially in performance-sensitive, high-throughput environments.

- Comfortable making architectural trade-offs and driving technical direction in ambiguous spaces.