Software Development Engineer III - Full Stack (Platform Frontend) at HighLevel

About the Role

We are seeking a Senior Full-Stack Engineer with strong front-end expertise and solid backend experience using Nest.js and MongoDB. This role involves building high-quality user interfaces, developing scalable backend services, and driving performance improvements end-to-end. You will also provide technical leadership, mentor teammates, and contribute to engineering best practices.

Key Responsibilities

• →Build performant, scalable, and reusable UI components using Vue.js or similar
• →Identify and fix performance bottlenecks in rendering, bundle size, API usage, and caching
• →Improve page load speed, responsiveness, and UX performance
• →Maintain a clean and modular front-end codebase using modern TypeScript practices
• →Design and build scalable, maintainable APIs using Nest.js
• →Work with MongoDB for schema design, indexing, aggregation pipelines, and query performance
• →Implement secure authentication, authorization, and API best practices
• →Optimize backend services for high throughput, low latency, and reliability
• →Integrate microservices, message queues, or event-driven components as required
• →Take ownership of medium-to-large features and deliver them end-to-end
• →Lead performance-driven engineering improvements across the stack
• →Evaluate and integrate open-source tools, libraries, and frameworks
• →Mentor and guide junior engineers on frontend, backend, and system performance
• →Collaborate closely with Product, Design, Platform, and QA teams
• →Participate in code reviews, ensuring high quality and performance standards