Software Development Engineer III

Job Description

About Us:

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're seeking Software Development Engineer III with a deep mastery of Flutter and a forward-thinking approach to AI-assisted development. If you've architected complex systems, shipped high-performance mobile apps at scale, and pushed the boundaries of what AI can do for software engineers this role is for you.

You'll join the team behind our Mobile Platform: a flexible, modular system powering a growing ecosystem of customisable business apps. You'll be responsible for building features from the ground up, guiding architectural decisions, and pioneering how AI can reliably write code, minimize hallucinations, and enhance every step of our dev lifecycle.

Responsibilities:

- Architect and own high-performance, scalable mobile software from initial design to long-term stability and performance.
- Build production-grade Flutter apps used by thousands of customers daily, across diverse industries and use cases.
- Leverage LLMs and AI tools to write, refactor, test, and debug code efficiently while implementing guardrails to reduce hallucination and boost reliability.
- Develop and maintain shared tooling, frameworks, and libraries that empower other engineers to build fast with confidence.
- Collaborate with designers, PMs, and platform/backend engineers to ship full-stack features.
- Measure and improve app performance, test coverage, code health, and build stability using modern dev tooling
- Stay on the bleeding edge of AI/LLM technology, Flutter best practices, and mobile architecture patterns and bring that knowledge back to the team.

Requirements:

- 58 years of professional engineering experience (SDE II/III), including 3+ years in Flutter/Dart.
- Demonstrated ability to architect maintainable, modular mobile systems.
- Mastery of Flutter internals, widget lifecycle, performance profling, and effective state management approaches
- Track record of shipping and supporting large-scale mobile apps in production.
- Fluency in RESTful API design, mobile CI/CD, and Git-based workflows.
- Strong understanding of AI-driven development tools including prompt engineering, LLM-based code generation, test writing, and code review automation.
- Familiarity with hallucination mitigation strategies (e.g., code constraints, test scaffolding, embeddings, context injection).
- Excellent communication and collaboration skills especially in distributed, asynchronous teams.
- Bonus: Contributions to AI tooling, Flutter open-source libraries, or AI-enhanced mobile features.

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 recordkeeping, 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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