Software Development Engineer - III (GoLang)

About HighLevel: HighLevel is a cloud-based, all-in-one white-label marketing and sales platform that empowers marketing agencies, entrepreneurs, and businesses to elevate their digital presence and drive growth. With a focus on streamlining marketing efforts and providing comprehensive solutions, HighLevel helps businesses of all sizes achieve their marketing goals. We currently have 1000+ employees across 15 countries, working remotely as well as in our headquarters, which is located in Dallas, Texas. Our goal as an employer is to maintain a strong company culture, foster creativity and collaboration, and encourage a healthy work-life balance for our employees wherever they call home. Our Website - https://www.gohighlevel.com/ YouTube Channel - https://www.youtube.com/channel/UCXFiV4qDX5ipE-DQcsm1j4g Blog Post - https://blog.gohighlevel.com/general-atlantic-joins-highlevel/ Our Customers: HighLevel serves a diverse customer base, including over 60K agencies & entrepreneurs and 500K businesses globally. Our customers range from small and medium-sized businesses to enterprises, spanning various industries and sectors. Scale at HighLevel: We work at scale; our infrastructure handles around 3 Billion+ API hits & 2 Billion+ message events monthly and over 25M views of customer pages daily. We also handle over 80 Terabytes of data across 5 Databases. About the Team: The Expansion Products team is responsible for driving volumetric & usage based upgrades and upsells within the platform to maximize revenue potential (apart from the subscription revenue). We do this by building innovative products & features that solve real-world problems for agencies and allow them to consolidate their offering to their clients in a single platform packaged under their white-labled brand. The expansion products team focuses exclusively on products that can demonstrate adoption, drive up engagement in target segments and are easily monetizable. This team handles multiple product areas including Phone System, email system, online listing integration, WordPress Hosting, Memberships & Courses, Mobile Apps, etc. About the Role: We?re building a global commerce platform to power $1T+ in annual transactions for millions of SMEs. As an SDE III, 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 Qualifications: 4-6 years in Software Development Backend: Go, ConnectRPC, BufFrontend: Vue.js , Vite, Webpack MFA, TanStack Query Databases: MongoDB, Firestore, ClickhouseCloud: GCP (GKE), Pub/Sub, Redis, OpenTelemetry 1+ years building with protobuf/GRPC/ConnectRPC- Experience with MongoDB/Firestore, Redis, and event-driven systems (Kafka, Pub/Sub) Strong distributed systems fundamentals: idempotency, retries, ordering, concurrency, consistency Hands-on with Kubernetes and GCP; familiarity with secrets/KMS and PCI basics- Deep testing discipline: unit, integration, contract, performance Schema design for scale and backward compatibility Excellent debugging and problem-solving skills Solid UI development experience with Vue.js and TanStack Query Ability to build responsive, accessible, and performant UIs that integrate cleanly with backend APIs Familiarity with component-driven design, state management, and modern frontend tooling (Vite, ESLint, etc EEO Statement: At HighLevel, we value diversity. In fact, we understand it makes our organisation stronger. We are committed to inclusive hiring/promotion practices that evaluate skill sets, abilities, and qualifications without regard to any characteristic unrelated to performing the job at the highest level. Our objective is to foster an environment where really talented employees from all walks of life can be their true and whole selves, cherished and welcomed for their differences while providing excellent service to our clients and learning from one another along the way! Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. 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