Full Stack Engineer

Senior Full Stack Engineer

🚀Onfire.ai

📍 Tel Aviv

About Onfire.ai

Onfire is a fast-moving, VC-backed startup using applied AI to turn raw data into real-time revenue intelligence. We power B2B go-to-market teams at software infrastructure companies with deep visibility into product interest, tech adoption, and account intent-so they can focus where it matters most.

The Role

We’re looking for a talented Senior Full Stack Engineer to join our team and help shape our platform end-to-end. You'll work across the stack to build fast, scalable systems and high-impact user experiences- from backend logic to frontend polish. This is an opportunity to shape a product at the cutting edge of B2B data and AI.

We operate at the forefront of AI, leveraging tools like Cursor and Claude Code as part of our core development workflow to build smarter and move faster.

What You’ll Do

• Own the end-to-end development of scalable web applications using Python (backend) and Next.js (frontend).
• Design and implement complex backend systems, APIs, and data-intensive services.
• Lead architectural decisions and drive technical direction across features and domains.
• Build fast, high-quality user experiences with strong attention to performance and usability.
• Work closely with Product, Design, and DevOps to translate business needs into robust technical solutions.
• Improve development velocity by leveraging modern AI tools (e.g., Cursor, Claude Code) as part of the workflow.
• Raise the engineering bar through code reviews, testing, CI/CD, and hands-on mentorship.

What You Bring

• 6+ years of experience in full-stack development.
• Strong backend skills in Python.
• Deep experience with Next.js and React.
• Solid understanding of cloud infra (AWS) and DevOps flows.
• Git, CI/CD, and testing best practices in your toolkit.
• Sharp problem-solving and strong attention to detail.
• Clear communication and a collaborative mindset.