Senior Full Stack Engineer

About the role

At Haast, we are building one of the first agentic systems for enterprise legal and compliance teams that actually automates their manual work end-to-end. Delivering 80% faster compliance reviews and 4x productivity gains for some of the world's largest organisations, we operate at the intersection of high-stakes compliance and modern AI automation. Backed by a $12M USD Series A from Peak XV Partners, DST Global, and Airtree, we are actively scaling the infrastructure that will redefine how enterprises think about compliance. If you are excited about building the systems that make compliance manageable at scale, this role is for you.

What you'll do

You will design, architect, and operate scalable services and APIs that power our LLM compliance platform from the ground up. You will architect how our AI insights are surfaced to users, ensuring the system is robust, fast, and intuitive for enterprise legal teams. You will make high-impact technical decisions quickly while challenging why and how to deliver the best possible experience for our users. You will ship features to production that directly impact enterprise customers and reduce manual compliance work. Collaborate closely with the founding team to move fast while maintaining reliability and quality. Shape our engineering culture, standards, and tooling as we scale the platform. Work on systems that scale globally and handle mission-critical compliance workflows. Translate complex customer requirements into resilient backend and frontend solutions. Own the full lifecycle of production features from design through to monitoring and iteration. Build interfaces that make AI insights clear, actionable, and easy for compliance teams to use. Partner with stakeholders to understand problems deeply and translate them into technical specifications. Maintain high code quality while moving quickly to support rapid enterprise sales cycles. Ensure systems are observable, debuggable, and maintainable in long-term operation. Contribute to technical roadmap discussions that define the future of compliance automation.

Requirements

You have built systems at meaningful scale that are now in production serving real users. You write clean code with strong reasoning around design and can explain tradeoffs clearly. You genuinely care about how systems work, not just whether they run. You are deep on one or more of Go, Node.js/TypeScript, or Python and comfortable enough on the frontend to contribute when it matters. You understand APIs and distributed systems in production, including reliability and failure modes. You have shipped in fast-moving environments and know how to move without sacrificing reliability. You are curious about how LLMs work and genuinely excited about building on top of them. You are comfortable making high-impact technical decisions quickly in an ambiguous, growing environment.

Why join Haast

Real impact, day one. Your code runs inside the workflows of major global enterprises immediately. It's production-grade work solving real compliance problems. Meaningful equity upside. We're building a generational company in a $50B market. You'll own a meaningful stake in that value creation. We believe in sharing success with the team that builds it. Exceptional learning velocity. Series A is where it gets real. You'll learn more about scaling systems, working with customers, and building products in 12 months here than most roles offer in three years. Engineering-driven culture. No red tape. No performance theatre. Just shipping. We hire smart people and get out of their way. Flexibility and community. Hybrid from our Sydney office, flexible hours, and a team that actually wants to work together.

Practical notes

Location: Australia

Engagement: Full-time. There is no closing date; applications are reviewed on a rolling basis. Apply with your CV and a brief note on a product you've worked on either at work or in your personal time that you're proud of. At Haast, we believe bold ideas come from diverse perspectives. We're committed to building a team that reflects the world we work in. Even if you don't tick every box, we'd love to hear from you.