Software Development Engineer III - Backend (Builder)

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 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 Role 
We are seeking an SDE-3 Backend Builder to own the CRM Opportunities product end-to-end. Opportunities is the deal and pipeline engine at the heart of our CRM — the system of record for every revenue motion our customers run, from lead conversion to closed-won.
This role emphasises deep backend ownership: designing data models, APIs, and distributed workflows that power pipelines, stages, automations, reporting, and integrations at scale. You will operate with high autonomy, turning ambiguous problems into production systems, with enough frontend fluency to ship the occasional UI surface without waiting on anyone.
 

What You’ll Do

Own the full lifecycle of Opportunities backend: translate business and customer needs into scalable, production-grade services

Design and evolve the data model for pipelines, stages, deals, and associated entities — getting consistency, throughput, and query patterns right

Build and scale APIs, event-driven workflows, and background jobs that handle high-volume writes, automations, and integrations

Tackle distributed systems concerns: idempotency, eventual consistency, race conditions, hot tenants, and noisy-neighbor isolation

Improve performance and reliability of large pipelines (millions of opportunities per workspace) through indexing, sharding, caching, and query optimization

Ship end-to-end when needed — including UI changes in Vue — without blocking on cross-functional handoffs

Instrument the system: logs, metrics, traces, and SLOs that make production behavior legible

Drive incident response, postmortems, and the engineering hygiene that keeps a high-traffic product healthy

What You’ll need:

4+ years building and operating production backend systems at scale

Strong fundamentals in data modeling (SQL and NoSQL), API design, and distributed systems

Hands-on experience with Node.js or Go in production

Track record of owning services end-to-end — design, build, deploy, on-call

Comfort working independently in ambiguous problem spaces with high ownership

Solid grasp of scalability, performance, and reliability trade-offs

Experience building CRM, sales, pipeline, or workflow products

Worked on multi-tenant SaaS at scale (sharding, tenant isolation, fair-use limits)

Familiarity with event streaming (Kafka/Redis Streams), queues, and async processi…