Sr. SDE (Email)

The role

You will own product features end to end on the Email team, from idea to prototype to production to scale. The work covers the email platform, sending infrastructure and deliverability, and APIs for email, serving 40M+ emails a day.

What you will do

• Translate business goals into working, deployable systems.
• Propose architecture, data models, workflows and implementation plans for your modules, then refine them with Tech Leads and Engineering Managers before you build.
• Own modules end to end: design, release, post-launch stability and ongoing improvements.
• Design clean, versioned, well-documented APIs as a core part of every feature.
• Turn ambiguous ideas into working demos quickly, using AI to build and iterate fast.
• Validate through experiments and real user feedback, then iterate to production quality.
• Build and maintain the Email ecosystem, designing for scalability, reliability and data integrity at 40M+ emails/day.
• Evolve sending infrastructure, including IP pool management, dedicated IPs and domains, and shared domain pools.
• Build robust error handling: idempotent processing, retries with backoff and graceful degradation.
• Practice test-driven development and build securely by default.

Required qualifications

• 4+ years building and running production systems, including owning them when they broke.
• Node.js (TypeScript) at scale: shipped and operated high-throughput backends and built product UIs in Vue.js (or React).
• Designed or re-architected a system for 10x growth and can explain tradeoffs in queues, caching, partitioning and storage.
• Built pipelines where losing or duplicating a record was not acceptable, using idempotency, deduplication and reconciliation.
• Modelled data for transactional and analytical workloads and made queries fast over billions of rows in ClickHouse (or BigQuery, Snowflake or similar).
• Ran services on GCP or AWS (Kubernetes, Pub/Sub or SQS, managed databases, IAM).
• Write tests first or alongside code (TDD), and treat auth, secrets, PII and abuse prevention as part of the design.
• Shipped at least one AI or LLM-powered feature to real users.
• Use AI coding tools every day and own every line that ships.
• Take vague problems, break them down and reach a working answer without waiting for a ticket.

Nice to have

• Experience with Go (Golang).
• Experience in the email domain: email rendering, templates, SMTP/ESPs, or deliverability (IP warm-up, sender reputation, SPF/DKIM/DMARC).
• Experience with data pipelines, analytics or telemetry.
• Strong UX and front-end sensibility.
• A portfolio or GitHub showing deployed systems.

Before you apply

• The company is an Equal Opportunity Employer and invites voluntary demographic information; refusal does not affect application status.

About the company

HighLevel is an AI-powered business operating system for agencies, entrepreneurs and SMBs across 150+ countries. It operates as a global, remote-first organization with over 2,000 team members across 10+ countries.