Software Development Engineer III - Full Stack Development (Platform Experience)

HighLevel is a cloud-based marketing and sales platform that supports over 2 million businesses in enhancing their digital presence. The Software Development Engineer III role focuses on optimizing customer success through the development of high-impact experiences and mission-critical growth products, ensuring system reliability and performance.

Responsibilities:

• Design and build highly reliable, scalable systems to ensure mission-critical applications maintain near 100% uptime
• Proactively identify, debug, and eliminate performance bottlenecks and production issues
• Drive incident prevention through root cause analysis and systemic fixes
• Own end-to-end feature delivery from design to production
• Establish and enforce high coding standards, review practices, and clean architecture principles
• Practice and promote Test-Driven Development (TDD)
• Collaborate with product and data teams to measure, analyze, and optimize conversion funnels
• Contribute to long-term technical vision and architectural decisions
• Drive cross-team collaboration to improve platform-wide engineering standards
• Identify opportunities to implement AI-driven bots, intelligent workflows, and automation systems to improve customer productivity and internal efficiency
• Integrate AI capabilities within Onboarding, Launchpad, and Global Search to enhance user experience and personalization

Requirements:

• 5+ years of full-stack engineering experience with significant backend/system design exposure
• Deep expertise in distributed systems and event-driven architecture
• Strong experience with asynchronous job processing and background workers
• Solid understanding of both relational and NoSQL databases (MongoDB, ClickHouse preferred)
• Strong experience with modern frontend frameworks (Vue.js, React, or Angular)
• Ability to design and optimize interactive dashboards and data-heavy UIs
• Excellent understanding of software design patterns, API design, and microservices
• Hands-on experience with CI/CD pipelines, TDD, and automated testing frameworks
• Strong performance tuning, profiling, and optimization skills (especially Node.js)
• Experience with caching, rate limiting, and queuing systems
• Strong knowledge of Elasticsearch for search, indexing, and analytics
• Experience using Redis for caching, session storage, or background queues
• Strong communication skills with the ability to work cross-functionally
• Ability to make clear architectural trade-offs and guide team decision-making
• Contributions to open-source tools, internal platforms or engineering blogs
• Exposure to AI-driven content tools or automation systems