Senior Backend Engineer (Python)

Senior Backend Engineer (Python)📍 Warsaw, Poland (Hybrid)☑️ Full-time🕦 B2B Contract💰 $8.000 - $12.000/monthWe are hiring a Senior Backend Python Engineer for an innovative technology company building AI-powered enterprise software used by organizations worldwide.This role is ideal for an experienced backend engineer who enjoys designing scalable production systems, solving complex technical challenges, and taking ownership of critical backend services from architecture through production. You'll work closely with product, frontend, and platform engineers to build reliable, secure, and high-performance applications while leveraging modern AI-assistedengineering practices.As a Senior Backend Python Engineer you will provide backend development, system design, cloud infrastructure, and technical leadership in a fast-paced engineering environment where ownership and continuous improvement are highly valued.Requirements6 years of experience building and maintaining production-grade backend systemsStrong hands-on experience with Python and modern backend development practicesStrong understanding of distributed systems, concurrency, asynchronous processing, and scalable architecturesExperience designing and developing REST APIs and backend servicesHands-on experience with cloud platforms such as AWS, GCP, or AzureStrong knowledge of database design, performance optimization, and high-throughput applicationsExperience building secure, reliable enterprise applications with a security-first mindsetAbility to own projects from technical design through deployment and production supportExperience working closely with cross-functional engineering and product teamsStrong troubleshooting, problem-solving, and communication skillsExcellent written and verbal English communication skillsImprove engineering leverage with AI tooling, automation, and internal workflows rather than using AI as a gimmickNice to HaveExperience building AI-powered applications, agentic systems, LLM integrations, or orchestration frameworksExperience with TypeScript or full-stack developmentExperience mentoring engineers or contributing to technical leadershipExperience with observability, monitoring, logging, and performance optimizationExperience working in fast-growing product or startup environmentsResponsibilitiesDesign, develop, and maintain scalable backend services, APIs, and asynchronous processing systemsTranslate business requirements into robust technical solutions and scalable system designsOwn services throughout their lifecycle, including deployment, monitoring, reliability, and continuous improvementDesign efficient data models and optimize database performance for production workloadsCollaborate with product, frontend, and platform teams to deliver end-to-end featuresImprove engineering productivity through automation and AI-assisted development workflowsParticipate in architecture discussions, code reviews, and technical decision-makingImplement monitoring, logging, and observability solutions to ensure production reliabilityContinuously improve system scalability, performance, security, and maintainabilityContribute to engineering best practices and knowledge sharing across the team