Catio is building the world’s first AI-powered Copilot for Tech Architecture—helping CTOs, architects, and developers plan high-ROI architectures, modernize and optimize their tech stacks, and make faster, smarter decisions using AI-driven intelligence. Backed by top-tier VCs and led by industry experts in AI, cloud, and enterprise architecture, we aim to democratize the intelligence and know-how for designing, evaluating, and evolving world-class tech stacks across industries worldwide. The Role: Senior Backend Engineer This is a high-impact, deeply technical individual contributor role where you’ll be designing and building the intelligent backend systems that power Catio’s AI-first platform for cloud-native architecture planning. You’ll be working at the intersection of distributed systems, data pipelines, and ML infrastructure to power our agentic AI recommendations and architecture insight workflows. This is not your average backend role—it demands systems thinking, architectural curiosity, and a passion for enabling deep visibility and expert automation for modern tech stacks. You’ll help bring to life our vision of becoming the go-to Copilot for tech stack architecture, by contributing to the intelligence layer that understands infrastructure, models system behaviors, and suggests improvements that drive engineering and business ROI. We’re looking for a rising star IC—someone who is technically rigorous, thrives in ambiguity, and wants to own meaningful product and platform depth from day one. If you’re someone who has built 0→1 systems, consistently raised the bar in engineering quality, and believes in the power of great tooling for tech leaders, this is your platform. 🚀 What You’ll Do: Build scalable backend systems powering our observability, architecture modeling, and recommendation engines—leveraging data pipelines, microservices, and system modeling techniques. Integrate AI/ML workflows by collaborating with AI engineers to embed LLM-based and multi-agent architecture intelligence within the platform, enabling rich architecture recommendations and generative planning. Contribute to core architecture capabilities : Help identify key architectural patterns and best practices, build backend services that reflect architecture decisions and evolution, and ensure Catio provides actionable visibility for our users. Optimize performance and maintainability : Implement monitoring, fault-tolerant workflows, and observability layers for mission-critical services. Collaborate cross-functionally : Work with product managers, AI researchers, and technical leadership to translate requirements into robust platform capabilities. What You Bring: 4+ years of experience in backend engineering at top-tier startups or technology companies, although we are not opposed to less experienced candidates with outstanding expertise. Proven track record of building scalable, production-grade systems, ideally in 0→1 product environments. Expertise in modern backend languages and frameworks (Go, Python preferred), with a passion for clean, idiomatic, maintainable code. Deep knowledge of distributed systems and microservices architectures, with practical familiarity in observability and DevOps tooling. A systems-thinking mindset and a passion for solving architecture and infrastructure challenges—especially for the cloud-native space. Strong aptitude for performance tuning, debugging, and technical architecture design. Demonstrated ability to leverage AI-assisted development (e.g. Cursor, ChatGPT, Claude Code), with an openness to leveraging emerging technologies. A high-trust personality with a growth mindset—able to collaborate across teams, share context, and own outcomes. Academic strength in Computer Science or related field; graduate-level education is a plus. Shape the Future with Catio Join a world-class team of AI, engineering, and business leaders from Splunk, Atlassian, Dropbox, and more to build a category-defining platform. At Catio, we offer top-tier compensation for startups at our stage, ensuring highly competitive salaries along with significant equity in a rapidly growing, VC-backed company. We are also committed to fostering an inclusive and diverse workplace and welcome applicants of all backgrounds and identities. Join us and help revolutionize how companies plan and optimize their tech stacks using AI-driven intelligence!