Senior Software Engineer (Chat)

Location: Sydney, AU, Hybrid (3 days in office required)

About Us At Relevance AI, we're building the home of the AI workforce. Our mission is simple: empower every team to delegate meaningful work to AI agents that think, act, and collaborate like experts. With Relevance AI, anyone can create and manage intelligent agents that handle workflows, decisions, and collaboration - all within one unified platform. Our technology already powers industry leaders such as Canva, Databricks, Confluent, Autodesk, Lightspeed, Rakuten, Aveva, Qualified, and Activision Blizzard, helping them scale excellence across operations, marketing, and sales.

We're backed by Bessemer Venture Partners, Insight Partners, Peak XV, and King River Capital, and raised our Series B in April 2025 to accelerate growth and push the boundaries of agentic automation.

Headquartered in San Francisco and Sydney, we operate on a hybrid model. In 2025, named LinkedIn's #1 Startup in Australia.

The Role We're hiring for Senior Back-End Software Engineers to join our Chat team in Sydney. This team owns one of Relevance AI's newest and fastest-growing products: Chat, the conversational layer of our platform. Chat enables users to interact with pre-built AI agents, workplace productivity tools, and research workflows - all through a highly reliable, scalable back-end that powers real-time, agentic experiences.

Your Impact

• Design, build, and operate scalable back-end systems that power real-time, AI-driven chat experiences.
• Own mission-critical services and infrastructure, delivering impactful features from ideation through to production.
• Push the boundaries of applied AI by enabling new agent capabilities, workflows, and system behaviours.
• Shape how we build by influencing engineering standards, architecture, and processes as we scale.
• Mentor and support engineers across the team, raising the bar for technical quality and ownership.
• Set and uphold high standards for code quality, performance, reliability, and security.
• Collaborate closely with product, design, and leadership to align technical direction with business outcomes.

Our Tech Stack

• Frontend: React, Typescript
• Backend: Express.js, Node.js, Typescript
• Database: PostgreSQL, MongoDB
• Cloud Infrastructure: AWS, Vercel, Terraform
• AI Coding Tools: Claude Code, Cursor, Codex and more

(This is a back-end-focused role. Frontend experience is helpful but not required; strong back-end and systems experience is what matters most)

What We're Looking For

• 5+ years of hands-on software engineering experience, ideally within fast-paced, high-growth tech environments.
• Strong experience designing, building, and maintaining production back-end systems.
• Thrive in dynamic, high-performance start up settings and comfortable with ambiguity, rapid iteration, and taking initiative.
• Demonstrated ability to take full ownership of projects, solve complex problems, and consistently deliver high-quality, impactful results.
• Deep interest in artificial intelligence and excitement to build innovative, category-defining products.
• Regularly leverage AI tools and technologies in your workflow, and stay up-to-date with the latest advancements to boost productivity and innovation.

Bonus Points

• Experience building systems for enterprise or high-scale users.
• Contributions to open-source projects.
• Hands-on experience with LLMs, agent workflows, or AI infrastructure.

Interview Process

• Talent Interview
• Engineering Manager Interview
• Technical Interviews
• Co-Founder Interview

Benefits

• ESOP – Employee Stock Ownership Plan
• AI Productivity Benefit – Up to $1200 USD/year
• Parental Leave – 12 weeks paid, plus 6 additional weeks for birthing parent
• Milestone Merch
• Food, Drinks & Community – free breakfasts, snacks, Thursday/Friday team lunches, Uber Eats dinners
• Quarterly Team Events
• Social Clubs
• Sonder EAP