Software Development Engineer III – Calendars
Job Description
HighLevel, a rapidly growing SaaS company, is seeking a Software Development Engineer III to join their Core team. This role focuses on developing sophisticated scheduling and calendar features that serve various industries. The position offers an exciting opportunity to work with a company that processes over 15 billion API hits daily and manages 470 terabytes of data across five databases.
The ideal candidate will be responsible for building backend-heavy full stack features that bring real-world booking experiences to life. You'll be working with cutting-edge technologies including Node.js/NestJS, TypeScript, and various databases like Firestore, PostgreSQL, and Redis. The role requires expertise in distributed systems and API design, with opportunities to work on complex features such as workflows, payments, lead generation, and intelligent search capabilities.
HighLevel offers a unique work environment with over 1,500 team members across 15+ countries in a remote-first setting. The company serves more than 2 million businesses globally, facilitating over 1.5 billion messages and generating over 200 million leads monthly. This position provides an excellent opportunity to make a significant impact on a platform that powers businesses worldwide.
The role combines technical challenges with business impact, requiring both deep technical expertise and an understanding of real-world business needs. You'll be working with various GCP tools and services, building scalable solutions that need to handle massive data volumes and complex business logic. The position offers exposure to diverse industries and use cases, from healthcare to education and local services.
As an SDE III, you'll be expected to contribute beyond just coding – you'll be involved in system design, architectural decisions, and cross-team collaboration. The role offers the opportunity to work with modern AI tools to enhance development efficiency while maintaining high code quality standards. If you're passionate about building scalable backend systems and want to work with a company that's making a real difference in how businesses operate, this role at HighLevel could be your next career move.
Responsibilities For Software Development Engineer III – Calendars
- Design and build backend-heavy scheduling features that power industry use cases like meetings, rentals, and services
- Build scalable APIs and business logic using Node.js/NestJS, with Firestore, PostgreSQL, Elasticsearch, and Redis as data layers
- Leverage GCP tools like Cloud Tasks, Cloud Scheduler, Pub/Sub, and Cloud Functions
- Contribute to the full development lifecycle
- Integrate seamlessly with App and Integrations teams
- Work on features like form submissions, appointment workflows, notifications, payments, notes/tasks, and intelligent search capabilities
- Build modular systems that adapt to diverse customer workflows
Requirements For Software Development Engineer III – Calendars
- 4+ years of experience in software engineering with a strong focus on backend systems and API design
- Deep expertise in Node.js/NestJS, TypeScript, and distributed system fundamentals
- Experience working with both SQL and NoSQL databases at scale
- Ability to work end-to-end across the stack
- Solid understanding of async workflows, queues, background jobs, webhooks, and system state transitions
- Familiarity with GCP services or willingness to get hands-on with them
- Openness to using AI tools to accelerate development and improve code quality
- Strong debugging and system design skills
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