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Numeral is an AI-native tax solution serving over 3,500 global businesses. The company has raised $157M from top-tier investors including Insight Partners, Salesforce Ventures, and Benchmark, and has tripled revenue annually.
As a Senior Software Engineer on the Platform team, you will own the services, infrastructure, and developer interfaces that power Numeral's tax automation platform. You'll work across the public API, MCP server, and integrations with billing platforms and ERPs, ensuring systems are reliable and scalable as transaction volumes grow.
Key responsibilities include:
- Building and evolving the public API and MCP server to enable customers, developers, and AI tools to integrate with Numeral
- Creating integrations with billing platforms and ERPs, handling data synchronization, workflow automation, and financial data complexity
- Improving platform infrastructure to support reliable APIs, background jobs, and data pipelines
- Owning projects end-to-end from technical design through production and ongoing operation
- Enhancing observability, performance, and incident response capabilities
- Automating infrastructure and deployment workflows using infrastructure-as-code, CI/CD, and container tooling
- Partnering with product and engineering teams to ship new capabilities while maintaining system dependability
This is a hands-on role with meaningful ownership. You'll contribute to architecture decisions and work closely with cross-functional teams to make tax automation work reliably for customers.
REQUIREMENTS:
- 5+ years of experience building and operating backend software or platform systems in production
- Strong backend engineering skills with experience in Node.js, PostgreSQL, and Redis, or comparable technologies
- Experience building APIs, integrations, or data pipelines with attention to correctness, error handling, and maintainability
- Practical experience with AWS or another cloud platform and containerized workloads (ECS, Kubernetes, or similar)
- Understanding of distributed systems fundamentals including retries, idempotency, queues, and failure recovery
- Experience using logs, metrics, and tracing to debug production issues and improve system reliability
- Ability to work through ambiguity, make pragmatic technical decisions, and communicate tradeoffs clearly
- Ownership mindset and customer focus; you follow through and connect technical decisions to customer needs
NICE TO HAVES:
- Experience with payments, tax, accounting, or systems requiring accurate and auditable financial data
- Experience integrating with billing platforms or ERPs
- Experience building public APIs, developer tooling, or MCP servers
- Background in infrastructure or platform engineering (Terraform, CI/CD, observability tooling)
- Experience with event-driven systems or evolving growing application architectures
