Software Development Engineer III | Full stack - Wallet

The role

We’re looking for a Software Development Engineer III (SDE III) with strong backend expertise and enough full-stack capability to own features end-to-end.

What you will do

Own end-to-end feature delivery for the Wallet, Billing & Taxes platform – from API design and backend implementation to necessary Vue.js frontend changes.
Build and maintain highly stable, performant, and scalable backend services using Node.js, MongoDB, and distributed systems patterns.
Identify and fix systemic issues (crashes, time-outs, race conditions, memory leaks, etc.) to improve overall platform reliability.
Drive performance optimizations and cost-efficiency improvements (query tuning, caching strategies, indexing, reducing cloud spend).
Actively reduce technical debt by refactoring critical parts of the codebase, improving test coverage, and eliminating anti-patterns.
Implement and enforce security best practices (input validation, auth flows, secrets management, rate limiting, etc.) in every change.

What you need

Must-have skills

Deep expertise in Node.js, MongoDB, Vue.js, and distributed systemsProven track record in building highly stable, scalable backend platformsComfortable contributing to the frontend when needed (this is not a UI-heavy role)

What the role is really about (backend-heavy): You’ll join our Wallet team that powers Wallet, Billing, Taxes, and related services. Your focus will be on foundational, platform-level work:Ensuring rock-solid system stability and performance under growing loadDriving scalability, tech debt reduction, security hardening, and cost optimization Solving complex distributed systems challenges that keep the entire Wallet ecosystem reliable and efficient.

This is a backend-first, full-stack role — you’ll spend most of your time on architecture, performance, and infrastructure while still being able to ship complete features when required. If you love deep backend problems and want to own the stability and scalability of a mission-critical product, this is for you.

Requirements

4–7 years of backend engineering experience with proven exposure to scale (high TPS, large datasets, or multi-tenant environments)
Expert-level Node.js and a strong track record of writing clean, modular, reusable codeDeep expertise with MongoDB (complex schemas, aggregation pipelines, indexing, sharding)
Solid production experience with Redis (caching, rate-limiting, pub/sub, distributed locks)Hands-on experience building and running microservices on Kubernetes (basic K8s knowledge is sufficient – deployments, services, configmaps, etc.)
Strong hands-on experience with any major cloud provider (GCP, AWS, or Azure) – you know how to use managed services for containers, queues, caches, serverless, and databases effectively
Comfortable contributing to the frontend using any modern UI framework (Vue.js, React, Angular – Vue.js experience is a plus but not mandatory)
You’ve shipped and supported large-scale, mission-critical systems that stayed stable under heavy load. You love modular architecture, obsess over performance and cost on GCP, and can jump into the frontend when needed to ship complete features.

Software Development Engineer III | Full stack - Wallet

The role

What you will do

Software Development Engineer III | Full stack - Wallet

The role

What you will do

What you need

Must-have skills

Requirements

Nice to have

About HighLevel

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