About Calibrax AI

Calibrax.ai is a team of high-caliber AI practitioners dedicated to building cutting-edge, practical AI solutions with real business impact. We help organizations craft their AI strategy, ensuring alignment with their goals, and deliver end-to-end solutions—from ideation and model development to deployment and long-term optimization. Our culture values ownership, curiosity, and innovation—where questioning assumptions, learning continuously, and thinking differently are encouraged. At Calibrax, we don’t just develop AI; we calibrate it for precision, efficiency, and long-term success. If you’re passionate about solving complex problems with AI and want to work in a team that values transparency, integrity, and excellence, you’re in the right place.

The Role

We’re looking for a Senior AI Backend Engineer who will help architect and build the backend systems that power Calibrax’s AI solutions. You’ll develop scalable services, APIs, and data-driven infrastructure that enable our ML models, agent workflows, and automation engines to operate reliably in production. This is a hands-on role where you’ll own complex systems end-to-end, contribute to technical decisions, and work closely with ML engineers and product teams to deliver real-world impact.

What You’ll Do

• Design and build backend services and APIs that power AI workflows, agentic systems, and data pipelines.
• Architect scalable, fault-tolerant systems for model execution, data processing, and workflow orchestration.
• Implement high-performance storage and retrieval systems for embeddings, features, and model inputs/outputs.
• Collaborate with ML engineers to integrate models into production environments with clean interfaces and strong observability.
• Drive backend engineering best practices—clear documentation, robust testing, CI/CD, reliability, and performance.
• Own end-to-end components: from system design to deployment, monitoring, and ongoing iteration.
• Evaluate emerging infrastructure, cloud services, and backend technologies to strengthen our AI platform.

What We’re Looking For

• 6–10 years of backend engineering experience with a strong track record of building production systems.
• Deep expertise in Python, Go, Node.js, or Rust with strong fundamentals in system design and distributed systems.
• Experience building scalable APIs, event-driven systems, microservices, or workflow engines.
• Strong experience with cloud platforms (AWS, GCP, or Azure) and modern infrastructure tools (Docker, Kubernetes, Terraform).

Why Join Us?

• Build the core backend systems that power Calibrax’s AI solutions and automation engines.
• Work on technically challenging problems at the intersection of AI, distributed systems, and real-world enterprise workflows.
• Join a high-caliber engineering team that values transparency, integrity, and rigorous thinking.
• Your ideas, designs, and contributions will directly shape our platform and engineering culture.
• Flexible environment that supports growth, high autonomy, and continuous learning.