About HighLevel:

HighLevel is an AI powered, all-in-one white-label sales & marketing platform that empowers agencies, entrepreneurs, and businesses to elevate their digital presence and drive growth. We are proud to support a global and growing community of over 2 million businesses, comprised of agencies, consultants, and businesses of all sizes and industries. HighLevel empowers users with all the tools needed to capture, nurture, and close new leads into repeat customers. As of mid 2025, HighLevel processes over 4 billion API hits and handles more than 2.5 billion message events every day. Our platform manages over 470 terabytes of data distributed across five databases, operates with a network of over 250 microservices, and supports over 1 million hostnames.

Our People

With over 1,500 team members across 15+ countries, we operate in a global, remote-first environment. We are building more than software; we are building a global community rooted in creativity, collaboration, and impact. We take pride in cultivating a culture where innovation thrives, ideas are celebrated, and people come first, no matter where they call home.

Our Impact

As of mid 2025, our platform powers over 1.5 billion messages, helps generate over 200 million leads, and facilitates over 20 million conversations for the more than 2 million businesses we serve each month. Behind those numbers are real people growing their companies, connecting with customers, and making their mark - and we get to help make that happen.

About the Role:

We are seeking a highly experienced engineer to lead the evolution of our public and internal API ecosystem.

This role is central to our platform strategy:

-->You will design and scale API frameworks, define long-term versioning systems, and architect the backbone that powers thousands of partner integrations and developers

-->You will collaborate across engineering, product, and platform groups to ensure our API surface is reliable, scalable, discoverable, and future-proof, helping us deliver a seamless developer experience in a fast-growing, multi-tenant SaaS environment

This is a high-impact role suited for someone who:

-->Has deep experience working in large-scale SaaS platforms

-->Has built and governed API frameworks used by external developers and internal teams

-->Thinks in terms of platform consistency, lifecycle management, and architectural clarity

-->Operates with strong product ownership and cross-team influence

Responsibilities:

Architect, maintain, and evolve the core API platform infrastructure used by all product teams

Define and enforce API governance standards, including request/response schemas, naming conventions, error envelopes, authentication patterns, and security guidelines

Own API lifecycle management: versioning, migration, deprecation, and compatibility guarantees.

Lead the creation of tooling for SDK generation, documentation automation (OpenAPI), contract validation, and developer onboarding workflows

Design and scale multi-tenant, high-traffic API systems handling millions of requests/day

Build frameworks for API reliability: rate limiting, circuit breaking, retry semantics, idempotency, and data consistency patterns

Architect secure and resilient integration pipelines: webhooks, events, streaming services, and async workflows

Build an exceptional API developer experience through consistent design, intuitive onboarding, powerful debugging tools, and clear documentation

Shape and maintain an internal API catalog/schema registry used across teams

Improve API observability via structured logging, telemetry standards, SLO-driven dashboards, and API analytics.

Work with product managers to shape platform strategy around extensibility and ecosystem growth

Partner with engineering teams to guide API modeling, breaking-change mitigation, and backwards-compatible evolution

Requirements:

4+ years of engineering experience, with at least 2 years working on large-scale SaaS products.

Proven experience owning or designing public-facing API frameworks, developer platforms, or integration ecosystems.

Deep knowledge of API paradigms (REST, GraphQL, event-driven APIs), Versioning strategies (URL-, header-, media-type–based, resource evolution), Authentication & security standards (OAuth2.0, JWT, HMAC, scopes) & Schema evolution, OpenAPI management, and contract testing

Strong coding foundation in JavaScript/TypeScript and Node.js or similar backend stacks.

Experience with distributed systems: queues, event buses, CRON schedulers, idempotency, message ordering, and failure recovery

Demonstrated ability to design systems that scale to millions of events or API calls per day

Preferred Qualifications:

Experience with API gateway products (GCP, AWS API Gateway, NGINX, Envoy)

Hands-on work with streaming APIs, WebSockets, SSE, or long-polling patterns

Familiarity with domain modeling techniques (DDD, resource boundaries, BFFs)

Experience building internal developer platforms (IDPs), CLI tooling, or API scaffolding frameworks

Track record of driving cross-team architectural initiatives and establishing engineering best practices

Contributions to open-source API frameworks or published API design guidelines

Additional Information

EEO Statement:

The company is an Equal Opportunity Employer. As an employer subject to affirmative action regulations, we invite you to voluntarily provide the following demographic information. This information is used solely for compliance with government record-keeping, reporting, and other legal requirements. Providing this information is voluntary and refusal to do so will not affect your application status. This data will be kept separate from your application and will not be used in the hiring decision.

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Software Development Engineer III - API Platform

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