Software Architect – AI, Agentic Systems

• Architect and lead development of an AI-first coding platform.
• Design systems where AI agents and developers collaborate in real time.
• Build and implement agentic systems capable of planning tasks, writing code, running tests, and deploying applications.
• Integrate LLMs, especially Claude, into production workflows.
• Design tool-use/function-calling and agent-orchestration layers.
• Implement long-context management and multi-step reasoning loops.
• Define architecture for scalable, distributed AI systems on AWS.
• Evaluate .NET and alternative ecosystems to select the best tools for each challenge.
• Work closely with engineering teams to bring architecture into production.

• Strong experience as a Software Architect or Staff+ Engineer.
• Proven experience building or designing AI/agentic systems.
• Deep understanding of LLM integrations, especially Claude or similar models.
• Deep understanding of function calling / tool-use patterns.
• Deep understanding of agent orchestration and reasoning loops.
• Deep understanding of prompt engineering and context management.
• Hands-on experience with AWS and complex cloud-native architectures.
• Strong background in distributed systems and scalable platform design.
• Experience working across different stacks; current foundation in .NET, with openness to other ecosystems.
• Ability to make high-impact architectural decisions in fast-evolving environments.
• Strong communication skills and ability to influence technical direction.
• English proficiency at C1 level, written and verbal.
• Nice-to-have: experience building developer platforms or coding tools.
• Nice-to-have: familiarity with Replit, Cursor, or AI-assisted IDEs.
• Nice-to-have: experience with multi-agent systems or orchestration frameworks.
• Nice-to-have: background in DevOps automation or AI-powered CI/CD pipelines.
• Nice-to-have: exposure to product-led engineering environments.

• You are placed in a product-based company, with the same treatment as their full-time employees.
• Have our full back-office support, from career guidance to HR and concierge services.
• Enjoy our remote-first policy – we are a distributed team, after all.
• Get your own MacBook (none of that "bring your own device" stuff here).
• Have access to growth opportunities with other amazing technology professionals, through tech talks, chapter meetings, and even remote happy hours for tons of fun!
• Improve your English through free lessons with a native English speaker - get to the next level on your communication skills!
• Candidate Referral bonus (promote Ubi to your tech friends, and get paid for it!)
• Florianópolis headquarters available whenever desired, with weekly quick massages, tasty snacks, soft drinks, and games