Software Engineer (API + Infra)

About Numeral: Numeral is transforming how taxes get done. Digital businesses are currently bogged down by a painful web of regulations across 47 states and 50+ countries. We’re eliminating this burden so teams can focus on their core mission. We’re the largest and fastest growing AI-native tax solution. Started in 2023, Numeral has raised over $57M from Benchmark, Mayfield, Y-Combinator, and many others. We now serve over 2,500 paying customers and have more than tripled our revenue every year in our history. We’re primarily hiring in our SF and NY offices, but do hire remotely in some cases About the role: We’re looking for a senior Software Engineer (Infrastructure) who thrives on solving complex distributed systems problems at scale. You’ll design and build core infrastructure , improve service reliability and observability , and ensure the platform’s scalability as we handle increasing transaction volumes and integrations. This is a high-leverage, foundational role: your work will define the architecture and technical direction of our infrastructure platform while directly impacting our customers’ experience and the company’s trajectory. What you’ll do: Design and build highly scalable, secure, and reliable infrastructure to support critical APIs, services, and data pipelines. Lead infrastructure architecture decisions for performance, observability, and fault tolerance. Drive improvements in system reliability, monitoring, and incident response . Collaborate closely with product, platform, and data engineering teams to enable rapid feature development without compromising stability. Automate infrastructure management through infrastructure-as-code , CI/CD pipelines, and container orchestration. Champion best practices in operational excellence, disaster recovery, and distributed systems design. What you’ll bring: 5+ years of experience building and scaling backend or infrastructure systems in high-growth environments. Proficiency in Node.js, PostgreSQL, Redis, and AWS (or equivalent cloud platforms). Experience managing containerized workloads using tools like Kubernetes, ECS, or similar. Expertise in observability tooling (e.g., Datadog, Prometheus, OpenTelemetry) and monitoring pipelines. Proven ability to design fault-tolerant, distributed systems at scale. Strong debugging and performance optimization skills across the stack. Exceptional collaboration and communication skills, with experience partnering cross-functionally. Startup mindset: Not scared of ambiguity and hungry for rapid growth Intensity & Ownership: This is not a 9-5 — we’re scaling rapidly and have a massive opportunity ahead of us. Customer Obsession: You deeply care about the user experience and solving their problems Even better: Experience in payments, tax, accounting, or regulatory tech. Infrastructure or platform engineering background (e.g., CI/CD, observability). Experience scaling monolith-to-service architectures or event-driven systems. Familiarity with GraphQL, Kafka, Terraform, or container orchestration tools. What we offer: Competitive salary and equity - you’ll share directly in the company’s success Full medical, dental, and vision coverage Wellness perks like Headspace and the Peloton One App 401(k) to help you build long-term financial security Lunch and snacks when you’re in the office Regular team offsites and company events as we grow A culture built on ownership - your work matters and people will see it!