Senior Software Engineer

Arnica is an AI-powered application security platform built for developer teams that move fast. We protect software supply chains across 100,000+ repositories — detecting threats, eliminating false positives, and keeping security out of the way of shipping. We're a small, high-trust team that cares deeply about the craft and genuinely enjoys the work.

The Role

You'll be a core contributor on the engineering team, building the backend systems that power Arnica's platform. This isn't maintenance work — you'll be writing new features, shaping architecture, and working alongside engineers who hold each other to a high bar. AI tools are part of how we work, not just what we sell.

What You'll Be Doing

• Designing and building scalable backend systems in TypeScript and Node.js, with PostgreSQL as our primary data store.
• Applying solid object-oriented design principles to produce clean, maintainable, and extensible code.
• Using AI coding tools (Cursor, Claude, and others) as genuine productivity multipliers — not novelty.
• Shipping APIs, optimizing data flows, and collaborating with teammates on real product features.
• Owning projects end-to-end, from architecture discussions through production.

You're a Great Fit If You

• Have 5+ years of professional backend engineering experience.
• Are deeply comfortable with TypeScript, Node.js (Nest.js is a plus), OOP patterns, and PostgreSQL.
• Write code you'd be proud to have reviewed — and give feedback that makes your teammates better.
• Communicate clearly, work well on a team, and take initiative without needing to be directed.
• Reach for AI tools naturally and know how to apply them thoughtfully.

Bonus If You Have

• Experience with DynamoDB, AWS Lambda, or Kubernetes.
• A background in application security or DevSecOps.
• Worked at a startup and understand what it means to own outcomes, not just tickets.

Why Arnica

Small team, meaningful scope. You'll have real ownership over your work, direct access to decision-makers, and the freedom to shape how we build. Remote-first with deep trust. If you want your engineering judgment to matter — and to work on AI and security at a company where both are core, not buzzwords — we'd love to talk.

Perks

• Stock options with an early-stage startup
• Choice of hardware: MacBook Pro / Surface Laptop
• Claude Pro/Max plan and uncapped Cursor budget. We put our money where our mouth is on AI-native development.
• Unlimited PTO
• Health, dental, and vision insurance

Work Authorization

Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over sponsorship of an employment visa at this time.

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document upon hire.