[Hiring] Senior Python Software Engineer @OnHires

Role Description

Our client is looking for an experienced Senior Python Software Engineer to help build and evolve the backend infrastructure powering their AI platform.

• Design, build, and maintain scalable Python backend services.
• Develop new microservices and enhance existing platform functionality.
• Own features end-to-end, from technical design through implementation, testing, deployment, and maintenance.
• Build asynchronous services and real-time communication components.
• Work with distributed systems and message brokers.
• Collaborate closely with Product, QA, and Engineering throughout the entire development lifecycle.
• Participate in architecture discussions and technical decision-making.
• Write clean, maintainable, and well-tested production code.
• Contribute to code reviews, documentation, and engineering best practices.

Qualifications

• 5+ years of commercial Python development experience.
• Strong object-oriented programming (OOP) skills.
• Proven experience building and maintaining production backend applications.
• Experience designing and developing microservices.
• Strong understanding of the complete Software Development Lifecycle (SDLC).
• Experience with asynchronous programming, data streaming, and WebSockets.
• Experience with Django or FastAPI.
• Experience with RabbitMQ, Kafka, or similar messaging systems.
• Experience with Docker and Kubernetes.
• Solid Git workflow and version control experience.
• Strong software engineering fundamentals and system design skills.
• Excellent problem-solving abilities and the ability to quickly learn new technologies.
• Experience working in agile, cross-functional product teams.
• Good written and spoken English.

Requirements

• Experience building AI-powered products (Nice to Have).
• Familiarity with LLMs, RAG, LangChain, CrewAI, Hugging Face, OpenAI APIs, or similar technologies (Nice to Have).
• Experience with AWS, GCP, or Azure (Nice to Have).
• Experience working with PostgreSQL and/or NoSQL databases (Nice to Have).
• Familiarity with vector databases (Nice to Have).
• Infrastructure as Code (Terraform or CloudFormation) (Nice to Have).
• Experience with automated testing (Nice to Have).
• Bash scripting (Nice to Have).

Benefits

• Fully remote working environment.
• Preference for candidates based in Eastern Europe.
• Core collaboration hours approximately 11:00–18:00 CET.
• International distributed team.
• Product-focused engineering environment with high ownership.

Hiring Process

• Pre-screen interview with the external recruitment partner (30 minutes).
• HR interview (approximately 30 minutes).
• Technical interview with the Engineering Lead (approximately 90 minutes).
• Live coding session (approximately 2 hours).
• Offer.