Software Development Engineer II - Backend

Job description

**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](https://www.youtube.com/channel/UCXFiV4qDX5ipE-DQcsm1j4g) or [Blog Posts](https://www.gohighlevel.com/blog-on-the-move). **About Commerce & Payments Team:** The Commerce & Payments team is a newly formed organization to add HighLevel’s evolving capabilities and make it both a Commerce Platform and a surface where our customers can perform their sales motions for their products. Building Catalogs, subscriptions, fulfillment , payment processing engines, inventory mgmt, pricing, documents/contracts and more to enable our SMBs to increase their revenue will be the core focus of the org. Hardly any tech debt, mostly green field work working closely with product folks to build, ship and refine our Commerce offerings makes this an exciting place to learn, engage and thrive. ### About the Role: We're building a global commerce platform to power $1T+ in annual transactions for millions of SMEs. As an SDE II, you'll design core models — subscriptions, payments, reconciliation, and tax — plus the services around them. You'll define event contracts, data policies, and consistency guarantees to ensure every transaction is correct by design, traceable, and delightful at scale. ### Responsibilities: - Design and ship multi-tenant services: checkout, subscriptions, payments orchestration, invoicing, tax hooks - Integrate PSPs and local methods (UPI, wallets, BNPL, cards/3DS) with resilient webhooks and idempotent APIs - Implement an append-only double-entry ledger; apply event sourcing/CQRS where it improves scale and correctness - Write production-grade code with deep test coverage and OpenTelemetry instrumentation - Operate on GKE with CI/CD, autoscaling, SLIs/SLOs, and on-call ownership - Collaborate with PM/Design and mentor junior engineers ### Requirements: - 2+ years in software development - Experience with Postgres, Valkey, and event-driven systems (Kafka, Pub/Sub) - Strong distributed systems fundamentals: idempotency, retries, ordering, concurrency, and consistency - Strong multi-tenant systems fundamentals: tenant isolation, per-tenant data and quota boundaries, noisy neighbour containment - Hands-on experience with Kubernetes and GCP; familiarity with secrets/KMS and PCI basics - Deep testing discipline: unit, integration, contract, and performance testing - Schema design for scale and backward compatibility - Excellent debugging and problem-solving skills ### Tech Stack: **Backend:** Go, ConnectRPC, Buf **Databases:** Postgres (Primary), AlloyDB, ClickHouse **Cloud:** GCP (GKE), Pub/Sub, Valkey, OpenTelemetry