Backend Developer

<p><strong></strong><strong>Zing AI Coach</strong> is the world’s first AI Fitness Personal Trainer revolutionising the way you approach health and wellness. Four years ago, we embarked on a mission to redefine the fitness by replacing the need for a personal trainer with smart, personalised and motivating guidance powered by AI. We are not just another app - we are a movement. Our mission is to help people reach their full potential, physically and mentally, through transformative health journeys.</p><p>You’ll be joining the <strong>AI Coach vertical</strong>&nbsp;- the team behind Zing’s most innovative features. We build and ship the core logic powering real-time feedback, computer vision, recommendation systems, and AI-generated coaching. That includes working with LLMs, local models, and a custom fitness knowledge graph to deliver an intelligent, hyper personalised experience.</p><p>This is not just about building APIs - it’s about solving complex, user-facing problems with machine learning, backend engineering, and a tight feedback loop between product, data, and code.<br></p><p><strong>How we work</strong></p><ul><li>Work in fast-growing company (growth of user base during 2023 more than 10X times)</li><li>Fast time to market (usually one release per week)</li><li>Test coverage for codebase 87%</li><li>Cloud infrastructure in AWS</li><li>Production monitoring and alert systems</li><li>Code review process</li><li>Performance tests</li><li>CI-CD<br></li></ul><p><strong>Responsibilities</strong></p><ul><li>Design, build, and maintain backend services for AI-driven features — including workout recommendations, health tracking, and real-time coaching logic</li><li>Collaborate with ML engineers and product teams to integrate LLMs, computer vision models, and other AI systems into production</li><li>Own features end-to-end: from concept and design through implementation, testing, and deployment</li><li>Ensure our systems are observable, reliable, and fast, with proper monitoring, alerts, and performance tuning</li><li>Participate in code reviews, contribute to technical discussions, and help shape how we build software<br></li></ul><p><strong>We expect that you have</strong></p><ul><li>4+ years of professional work experience in software engineering with Python</li><li>Working experience in working with popular Python frameworks (Django, FastAPI)</li><li>Working experience with PostgreSQL (or other RDBMS)</li><li>Experience with a message broker like RabbitMQ</li><li>Experience with CI/CD, Monitoring</li><li>Ownership of projects from concept to release</li><li>Experience with payment libraries and services</li><li>Fluent English level<br></li></ul><p><strong>Beneficial skills</strong></p><ul><li>Understanding of cloud technologies, proficiency in AWS</li><li>Preferably, a degree in Information Technology, Software Engineering, or a related field</li><li>Highly interested in a fast-paced software development environment</li><li>Enthusiasm for learning and continuous improvement</li><li>Passion for Health &amp; Fitness<br></li></ul><p><strong>Why working at Zing is awesome</strong></p><ul><li>Be part of the fastest-growing fitness and lifestyle startup</li><li>Help shape the internal engine of one of the most exciting AI consumer products</li><li>Excellent work environment: the company is small enough to be person-oriented</li><li>Remote-friendly environment with the option to collaborate in-person</li></ul><p><br>Come be a part of something extraordinary at <strong>Zing AI Coach</strong> – where innovation meets inspiration, and every day brings new opportunities for growth and impact. Join us and help us create an exceptional user experience for <strong>Zing Coach!</strong></p><p><strong></strong></p><p><br></p>