Engineering Manager II - Whatsapp

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 peopleWith 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 impactEvery 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

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About the RoleWe are seeking a visionary Engineering Manager to spearhead our WhatsApp Team — the engine behind one of HighLevel’s most explosive growth stories. For our rapidly expanding global customer base, this isn’t just a feature; it is their lifeline and primary gateway for engaging with their own customers at scale.

This team architecturally owns the entire WhatsApp ecosystem: frictionless onboarding, complex WABA management, template lifecycles, high-throughput message delivery, and the sophisticated usage metering that powers our monetization. Operating at the intersection of our product ambitions and Meta’s global business platform, you will navigate a high-stakes environment where roadmap velocity meets the technical rigor of massive-scale API integrations. external platform's rate limits, policy changes and API deprecations as by our own product ambitions.

With adoption outpacing original architecture, your mission is pure-play core engineering: re-architecting for the next order of magnitude. You will solve for extreme deliverability under bursty load, resilient webhook ingestion, and ironclad tenant isolation. Leading a world-class team of 8+ engineers, you will own the technical destiny of a product that is scaling faster than the market, partnering with cross-functional leaders to ensure reliability never flinches in the face of hyper-growth.

Responsibilities

• Architect for massive scale: Own the high-level architecture and scaling decisions for core Phone platform components, including CPaaS abstractions, provider adapters, and shared messaging/voice APIs that support billions of monthly events.

• Own Phone Billing end to end: usage metering, rating, reserve/commit lifecycle, idempotency, reconciliation, and audit trails for the Phone and WhatsApp channels - with zero tolerance for double-charging or lost usage

• Lead the evolution of Trust & Compliance systems into a configuration-driven, rules-based platform that adapts to new regulatory and carrier requirements without invasive engineering change

• Work hands-on with technologies like NestJS, Firestore, MongoDB, PostgreSQL, Redis, Queuing Systems, Data Warehousing Systems and Service Mesh-based microservices

• Drive high-concurrency innovation: Lead the design and execution of cross-cutting initiatives to improve reliability, latency, and throughput across time-sensitive APIs and workflows serving millions of businesses.

• Drive observability and resilience by evolving our monitoring, alerting (Prometheus/Grafana), and incident response strategies - including the financial invariants that must be alerted on, not just the technical ones

• Leverage LLMs and AI tools to write, refactor, test, and debug code efficiently - while implementing guardrails to reduce hallucination and boost reliability

• Partner with product, infra, security, finance and legal teams to ensure data integrity, access control, and compliance across phone services

• Develop EM I leaders and senior engineers, build leadership pipeline, succession planning and raise the hiring bar

• Participate in design reviews, deep dives, and on-call rotations to support a high-bar culture of accountability and operational excellence

Requirements

• 9+ years of backend engineering experience with 2+ years of leadership, with a proven track record of designing fault-tolerant systems that operate at a scale of billions of hits or events.

• Deep expertise in distributed systems, event-driven architectures, and asynchronous job processing

• Demonstrated experience building systems where correctness is non-negotiable - metering, ledgers, billing, payments, or comparable transactional domains - with a working grasp of idempotency, exactly-once semantics, and reconciliation

• Proven experience optimizing availability, performance, and reliability in real-world systems under load

• Strong experience with relational and NoSQL data models (especially with complex transactional data)

• Experience designing policy- or rules-driven systems that evolve with external requirements rather than hard-coding them

• Familiarity with monitoring, SLOs, and root-cause analysis in production environments

• Familiarity with hallucination mitigation strategies (e.g., code constraints, test scaffolding, embeddings, context injection)

• Excellent communication and cross-functional collaboration skills, including with Finance, Legal and external partners

• A pragmatic, hands-on leader who balances long-term vision with iterative execution

Preferred Experience

• Experience with usage-based billing or metering engines in a high-volume product, specifically managing millions of transactional events per hour.

• Exposure to telecom trust and compliance regimes - 10DLC, toll-free verification, TCPA/TSR, DLT, carrier filtering or number portability

• Experience building provider-agnostic integration layers across multiple third-party vendors

• Experience working with AI Tools, Communication APIs (Twilio, Plivo etc)

• Contributions to open-source tools, internal platforms, or engineering blogs

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