Summary: Join LeapAI as a Senior Python Developer, leading core systems, bridging teams, and mentoring junior developers in a fast-paced, high-impact startup environment. Highlights: 1. Lead core systems and bridge technical and non-technical stakeholders. 2. Mentor junior developers and drive technical leadership. 3. Work in a high-impact, agile startup environment with massive growth potential. We are **LeapAI**, a Canadian startup focused on AI strategy and implementation. Our clients expect precision, reliability and speed—and that’s exactly how we operate. This is **not** a “sit in a corner and ship tickets” kind of role. As a startup, we move quickly, change direction when needed, and tackle problems that don’t have a playbook. You’ll work directly with experienced data scientists and engineers, and you’ll see the impact of your work in real projects, real clients, and real outcomes. **About the role** We’re looking for a Senior Python Developer to lead the core systems that power our products. You will be the technical anchor for a small team, but you also need to be a "Swiss Army Knife"—ready to code, architect, mentor, or jump on a client call when needed. You will bridge the gap between our **expert Data Science team**, our clients, and our junior developers. While our core product is AI\-driven, **you do not need prior AI experience**—just strong Python skills and a fearless approach to learning tools like LangChain and Langfuse. **Key Responsibilities** * **The Bridge (Client Facing):** You will speak directly with customers and non\-technical stakeholders to understand their pain points. Your job is to translate "business talk" into actionable technical tasks for your team. * **Startup Agility:** Be ready to wear multiple hats. Whether it’s fixing a critical bug, re\-architecting a feature, or helping with documentation, you are willing to fill in the gaps to get the job done. * **Technical Leadership \& Mentorship:** Lead by example. You will train and mentor junior developers, helping them level up their skills while ensuring code quality remains high. * **Cross\-Functional Collaboration:** Work hand\-in\-glove with Data Scientists to turn complex models into production\-ready software. * **Core Development:** Build robust Python applications using libraries like Pandas and NumPy, and integrate modern AI workflows. **What We Are Looking For** * **Experience:** 5 to 10 years of Python development experience. * **Startup Mindset:** You are comfortable with ambiguity and changing priorities. You take ownership of problems rather than waiting for permission to fix them. * **Communication Rockstar:** **Fluent English is mandatory.** You must be an excellent communicator who can explain technical constraints to non\-technical clients without jargon. * **People Skills:** You are patient and empathetic, capable of guiding junior devs and managing client expectations. * **Tech Stack:** Strong proficiency with **Pandas**, **NumPy**, Git, and Docker. Experience with cloud environments (AWS/GCP/Azure). **Nice to Have** * Experience with **LangChain**, **Langfuse**, or OpenAI APIs. * French language skills (a nice bonus). * Previous experience in a seed\-stage or high\-growth startup. **Why Join Leap AI?** * **Remote \& Flexible:** We care about output, not hours in a chair. Work from where you are most productive. * **Massive Growth:** Pivot your career into AI. You will learn from the best in the business. * **High Impact:** Your code will ship, and your decisions will shape the future of our platform. **How to Apply** Please submit your resume and a short note telling us about a time you had to "wear multiple hats" in a project or how you handle communicating technical issues to non\-technical clients. Job Type: Full\-time Pay: $30,943\.09 \- $35,622\.16 per month Work Location: Remote