Location: Remote (EU/UK preferred)Team: EngineeringType: Full-time, ContractorAbout the RoleAguru is an agentic AI automation platform for SaaS businesses, bringing together agents, workflows, and communication tools into one unified system. As our first Senior Full Stack Engineer, you'll be an early key player in our small, high-impact team. You'll own critical parts of the product architecture, working across the stack to deliver scalable, performant, and user-friendly features. This is a unique opportunity to shape the future of our platform and bring complex automation capabilities to life by collaborating closely with product, design, and AI engineering.Responsibilities:Design, build, and maintain core application features in Next.js.Develop robust APIs and server components.Work on Supabase (PostgreSQL) data models, queries, and role-based access policies.Implement responsive, accessible, and maintainable UIs with React, Tailwind CSS, and shadcn/ui.Integrate with AI and automation frameworks (Mastra, Vercel AI SDK, OpenAI, Google Gemini, Playwright).Ensure reliability, security, and scalability of the platform.ExperienceRequired:5+ years of professional experience in full-stack development.Strong expertise in React and Next.js.Proficiency in TypeScript.Solid experience with SQL databases (PostgreSQL, Supabase) and ORMs.Knowledge of API design and modern state management (TanStack Query or similar).Understanding of authentication/authorization flows.Familiarity with automated testing and debugging complex workflows.The following is a plus:Experience with AI/LLM integrations (OpenAI, Google Gemini, or similar).Experience with LLM prompt engineering.Previous experience in SaaS platforms or workflow automation tools.Contributions to open-source projects or developer communities.Core CompetenciesAnalytical Skills & Research: The ability to gather and analyse data, identify patterns, and draw logical, evidence-based conclusions.Autonomy & Accountability: The discipline to take ownership of your work, manage tasks independently, and deliver results with minimal supervision.Tech Agility: The ability to quickly learn and adapt to new technologies, tools, and platforms.Critical Thinking & Problem-Solving: The ability to analyse complex challenges, identify root causes, and develop effective, logical solutions.Creativity: The capacity to think innovatively, generate new ideas, and approach problems from unique perspectives.Attention to Detail: A precise and thorough approach to your work, ensuring accuracy and quality in every task.Communication & Collaboration: The ability to clearly articulate ideas and work effectively with others to achieve shared goals.Joining our team means that you'll be part of a small group of people who are genuinely excited about the product and momentum we're building. We value curiosity, collaboration and accountability. Here, youâll get to see your work progress from an idea to a finished product, fast.This is a unique opportunity to make a real impact and grow alongside us. If this sounds like the kind of place you want to be, we'd love to hear from you.To apply, please send your CV for the attention of Oleg at hiring@aguru.com with the subject line "Application for Senior Full Stack Engineer". The deadline to apply is September 30, 2025.Aguru is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all.Please mention the word **FORTUNE** and tag RMjAzLjExMC4yNDIuMzQ= when applying to show you read the job post completely (#RMjAzLjExMC4yNDIuMzQ=). This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human.