Ai Engineer

? About SofiraSofira is building the future of legal services. We create AI agents that automate repetitive corporate legal work, attacking one of the most complex and valuable markets in Brazil. ? The Opportunity: Help Build the Team from the Ground UpThis is not just another engineering role. This is an invitation to become a pillar of Sofira. You will be one of our first hires, working directly with our CTO, Pedro Leme (former Head of Engineering at Jusbrasil), to build the product and team from the ground up. As a member of the founding team, you will receive meaningful equity and have a direct stake in our success.Your mission: to tame the chaos of legacy government systems and leverage state-of-the-art generative AI to solve high-value, real-world problems. If you are driven by complex challenges, want to build a legacy, and have the ambition to shape the technical foundation of a category-defining company, this is your arena. ? What You'll Do (Your Mission)• Architect and build the foundational infrastructure for our AI platform, ensuring it is scalable, resilient, and secure from day one.• Own the core data and machine learning infrastructure that powers our agents, including our proprietary data processing pipelines and vector databases.• Own features end-to-end, mastering the backend while being versatile enough to contribute to our modern frontend to ship a seamless user experience.• Set the standard for engineering excellence. You won't just follow best practices; you will help create them through high-quality code, robust testing, and by fostering a culture of collaboration and high performance. ? Who You Are (The Profile)We value your mindset and ability to execute above all else. We are looking for a builder, not an employee. You are the right fit if:• You thrive in the intensity and ambiguity of a 0-to-1 environment and are eager to build a company from scratch.• You have a sense of radical ownership. You don't just "complete tasks"; you are responsible for a feature's success from idea to production and beyond.• You have a pragmatic 'hacker mindset': you find the simplest, most efficient path through complex problems, prioritizing solutions that deliver value now.• You are relentlessly proactive. You don't wait for instructions; you identify problems and opportunities and take the initiative to solve them.• You are an elite collaborator, ready to shape the culture of our founding team alongside us.• You are driven by an ambitious mission and excited by the opportunity to build a category-defining company. ? What You'll Need (The Hard Skills)2–5 years of professional software development experience.Strong expertise in backend development using Python and at least one of its web frameworks (e.g., Django, Flask, Fast API).Comfortable working with a modern frontend framework (e.g., React, Vue, Svelte) to implement UI features when necessary.Strong knowledge of SQL databases (e.g., Postgre SQL).Experience deploying and maintaining applications on a major cloud provider (AWS, GCP, or Azure).Comfortable using AI heavily for coding with tools like Claude Code, Cursor, and Git Hub Copilot, or willing to adopt these tools as part of your workflow.Fluency in English. ? Huge Plus (Bonus Points):Experience working with LLM APIs (Open AI, Google, etc.).Experience with data scraping, ETL, or data-intensive backend systems.Familiarity with modern AI developer tools and patterns (e.g., RAG, Lang Chain, DSPy, vector databases, retrieval pipelines).Previous experience in a high-growth B2 B Saa S startup. ? Why You'll Love Building Sofira With Us• True Ownership & Founding Equity: You won't be just an employee; you'll be a partner. As a founding team member, you will receive a significant equity stake. Your success is our success.• Build the Founding Team: You aren't just joining a team; you are creating it. Your voice will shape our product, our engineering culture, and the future of the company.• Solve Hard, Interesting Problems: Forget CRUD apps. Here, you will tackle a unique technical challenge in Brazil: modernizing access to legacy systems with cutting-edge AI.• Have an Outsized Impact: In a company this early, every decision and every line of code matters. Your work will have a direct and measurable impact on our destiny.• Work with an Elite Toolset: We have an AI-first engineering culture. You will be equipped with the best tools available (Git Hub Copilot, Cursor, Claude) to maximize your productivity and focus on what matters: solving hard problems.