Full Stack Builder - Email Builders Team

About us
HighLevel is an AI-powered business operating system that gives agencies, entrepreneurs and SMBs the infrastructure to build, automate and scale. Today, HighLevel supports SMBs across 150+ countries, fueling community-driven growth rooted in real customer outcomes.
To date, businesses operating on HighLevel have generated over $7 billion in ecosystem value, demonstrating the impact of shared infrastructure at scale. By centralizing conversations, automation and intelligence into one system, we help businesses move faster, reduce complexity and execute efficiently.
Behind the platform, HighLevel powers more than 4 billion API hits and 2.5 billion message events daily. With 250 terabytes of distributed data, 250+ microservices and over 1 million domain names supported, our architecture is built for performance, resilience and long-term scalability.
Our people
With over 2,000 team members across 10+ countries, HighLevel operates as a global, remote-first organization built for speed and ownership. We value initiative, clarity and execution, creating space for ambitious people to build systems that support millions of businesses worldwide. Here, innovation thrives, ideas are celebrated and people come first, no matter where they call home.
Our impact
Every month, HighLevel enables more than 1.5 billion messages, 200 million leads and 20 million conversations for the more than 1 million businesses we support. Behind those numbers are real people building independence, expanding opportunity and creating measurable impact. We’re proud to be a part of that.
Learn more about us on our YouTube Channel or Blog Posts.
About the Role:
The traditional model of siloed product managers, designers, and engineers is too slow for modern AI-native development. At HighLevel, every engineer owns a product outcome end-to-end, from idea to prototype to production to scale. You will operate as a Team of One. With AI tooling and strong engineering infrastructure, a single engineer can now build what previously required an entire squad. You are not implementing tickets. You own the product.
 

What You'll Do

Feature/Module Ownership:

Translate business goals into working, deployable systems

Propose architecture, workflows, and implementation plans for assigned modules/features; refine and finalize through review with Tech Leads and Engineering Managers before execution

Own modules end-to-end — from design discussion through release, post-launch stability, and iterative improvements

Rapid Prototyping & Iteration:

Turn ambiguous ideas into working demos quickly, with timelines scoped to complexity

Prototype using code, AI tooling, automation, or low-code systems

Validate through experiments and real user feedback, then iterate to production quality

Integrate email statistics and analytics with internal teams, and drive feature attribution and metrics visibility so a release is measurable on our dashboards.

Scale, Performance & Reliability:

Build and maintain the Email Template Builder web app — a system powering 30M+ emails/day, directly impacting scalability (throughput at peak load), reliability (uptime and send success rate).

Optimize frontend rendering performance, component architecture, lazy loading, and state management; tune backend queries, caching (Redis/CDN), and latency at scale.

Reason through token consumption, inference cost, and infrastructure tradeoffs when integrating AI/LLM tooling

Operational Excellence:

Instrument systems with monitoring and telemetry

Build evaluation loops for continuous quality improvement

Automate workflows that increase engineering velocity

Maintain clear, repeatable documentation

Tech Stack, You'll Work With

Frontend: Vue.js, JavaScript/TypeScript, HTML5, CSS3 (Tailwind/SCSS)

Backend: Node.js, NestJS

Data: MongoDB, Firestore, Clickhouse, Redis

Infra: GCP(Pub/Sub, K8s) Cloudflare

AI: LLM APIs, LangGraph, AI-aided dev tooling

Tooling: Git, Jenkins, observability stack(Grafana…