Software Development Engineer III (Fullstack) - Contacts

🏢 About HighLevel

HighLevel is an AI-powered business operating system providing infrastructure for agencies, entrepreneurs, and SMBs to build, automate, and scale. Supporting businesses across 150+ countries, HighLevel has generated over $7 billion in ecosystem value by centralizing conversations, automation, and intelligence. The platform handles over 4 billion API hits and 2.5 billion message events daily, with a robust architecture built for performance and scalability.

🎯 The Role

As a Software Development Engineer III on the Contacts Team, you will be a hands-on individual contributor driving technical outcomes for HighLevel's core CRM platform. This team manages the essential infrastructure for contact records, views, filters, and segmentation, interacting with every product surface. You will own high-impact initiatives to build scalable, reliable, and flexible systems powering millions of daily interactions.

🛠️ Tech Stack

Backend: Node.js, Nest JS, REST APIs, Redis, Firestore, Mongo, Elastic search Frontend: Vue 2 + Vue 3 (Composition API), Pinia, TypeScript, Vite Infrastructure: Docker, Kubernetes, GCP Messaging/Queues: Kafka, RabbitMQ, ActiveMQ Other: Distributed Systems, Microservices, AWS, Azure, CI/CD, Git

💼 What You'll Do

• Design and build highly scalable and reliable backend services using Node.js, MongoDB, and ElasticSearch, focusing on optimal indexing, sharding, and query performance.
• Develop and optimize user interfaces using Vue.js (or React/Angular) to deliver an exceptional customer experience.
• Design and implement real-time data processing pipelines utilizing Kafka, RabbitMQ, or ActiveMQ.
• Optimize system performance through autoscaling, database sharding, and advanced indexing strategies to efficiently handle millions of transactions.
• Collaborate closely with Product Managers, Data Engineers, and DevOps teams to ensure alignment on vision, execution, and business goals.
• Implement secure, maintainable, and scalable codebases, adhering to industry best practices.
• Drive high engineering standards, conduct thorough code reviews, and enforce best practices across the development team.
• Manage timelines, oversee deployments, and ensure smooth product releases with minimal downtime.
• Mentor other developers, promoting best practices in software development, clean architecture, and performance optimization.

✅ What You'll Need

• 4+ years of hands-on software development experience.
• Strong proficiency in Node.js, Vue.js (or React/Angular), MongoDB, and Elasticsearch.
• Experience with real-time data processing, message queues (Kafka, RabbitMQ, or ActiveMQ), and event-driven architectures.
• Proven expertise in scaling services to 200k+ MAUs and managing high-throughput systems.
• A strong understanding of database sharding, indexing, and performance optimization.
• Experience with distributed systems, microservices, and cloud infrastructures (AWS, GCP, or Azure).
• Proficiency in CI/CD pipelines, Git version control, and automated testing.
• Strong problem-solving, analytical, and debugging skills.
• Excellent communication and leadership abilities, capable of guiding engineers and collaborating with stakeholders.

🌟 Nice to Have

• Experience with Nest JS, Redis, Firestore.
• Familiarity with Docker and Kubernetes.
• Knowledge of Accessibility & Internationalization (i18n) best practices.