Software Development Engineer II - Frontend

About HighLevel
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 d 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
We're building a global commerce platform to power $1T+ in annual transactions for millions of SMEs. As an SDE II on the frontend, you'll build the surfaces that customers and their buyers touch: storefronts, checkout, catalog, subscription management, invoices and contracts. These surfaces carry money. They get embedded inside other people's experiences. They run on slow phones and flaky networks in 150+ countries. A layout shift shows up in someone's conversion rate, and a 300ms regression shows up in someone's revenue. This role is for engineers who obsess over frontend craft and have the depth to back it up. If you already know why your bundle is that size, where your hydration cost goes, and what your service worker does on a cache miss, we want to talk to you.
Responsibilities
- Build and ship the commerce surfaces: storefronts, checkout, catalog, subscription management, invoices and documents
- Embed our experiences inside other experiences — module federation, iframes and white-label hosts that stay isolated, load fast and degrade gracefully
- Own performance budgets end to end: Core Web Vitals, bundle size, render cost, hydration, main-thread work. Measure them in CI and defend them
- Build installable, offline-tolerant PWAs with service workers, considered caching strategies and background sync
- Deliver WCAG 2.2 AA accessibility and full localisation across languages, currencies, tax and address formats, and RTL layouts
- Instrument the client with real-user monitoring and OpenTelemetry so regressions surface before customers report them
- Collaborate with PM/Design and mentor junior engineers

Requirements
- 2+ years building and operating production frontend applications
- Deep Vue.js knowledge: the reactivity model, component composition, rendering behaviour, and the runtime cost of each choice
- A visible performance habit. You live in Lighthouse, Chrome DevTools and the performance profiler, and you can walk us through a regression you found, measured and fixed
- Service workers and caching strategy: precaching, runtime caching, versioning, invalidation, and offline behaviour that stays correct
- Client state management and local caching at scale (TanStack Query or equivalent): cache keys, staleness, invalidation, optimistic updates
- Accessibility as a build-time dis