Back End Developer ( AI)

Back End Developer (Infrastructură AI)$20-100/hr Remote Freelance CODINGAbout The RoleWhat if the code you write could directly power AI systems that shape how millions of people interact with technology? We are looking for Back End Developers in Iași to design, build, and optimize server-side systems and APIs that fuel cutting-edge AI products—from data pipelines and model serving infrastructure to scalable microservices that handle real-time traffic at scale.This is a fully remote and flexible contract. Whether you are an experienced engineer seeking meaningful projects or a strong developer ready to apply skills to adjacent AI infrastructure, this is your chance to build things that matter.Organization: AlignerrType: Contract ScheduleLocation: RemoteCommitment: 10–40 hours/weekWhat You Will DoDesign, develop, and maintain robust back end services, APIs, and data pipelinesBuild scalable and high-performance server-side architecture to support AI training and inference workloadsWrite clean, well-documented, and testable code following best engineering practicesIntegrate with databases, message queues, cloud services, and third-party APIsOptimize system performance, reliability, and scalability as usage growsCollaborate asynchronously with distributed teams of engineers, researchers, and product leadersTroubleshoot production issues, perform code reviews, and contribute to architectural decisionsWork independently on tasks and projects on your own scheduleWho You AreProficient in one or more back end languages—Python, Go, Java, Node.js, Rust, or similarStrong understanding of RESTful API design, microservices architecture, and distributed systemsExperience with relational and/or NoSQL databases (PostgreSQL, MongoDB, Redis, etc.)Comfortable working with cloud platforms like AWS, GCP, or AzureFamiliar with version control (Git), CI/CD pipelines, and containerization (Docker, Kubernetes)Strong problem-solving skills and the ability to debug complex systems independentlySelf-motivated, reliable, and efficient working asynchronously without close supervisionClear communicator who can document decisions and collaborate across different time zonesIt's A Plus If You HaveExperience building infrastructure for machine learning or AI systemsFamiliarity with data processing frameworks (Apache Kafka, Spark, Airflow, or similar)Experience in performance optimization, caching strategies, or high-throughput systemsKnowledge of best practices in authentication, authorization, and securityExperience with serverless architectures or event-driven design patternsContributions to open-source projects or a solid portfolio of personal/professional workWhy Join UsWork on cutting-edge AI infrastructure projects alongside top research labsCompletely remote and flexible—set your own hours and work from anywhereFreelance autonomy with access to significant and technically challenging workBuild systems at the intersection of software engineering and artificial intelligenceCollaborate with a global network of talented engineers and researchersPotential for ongoing work and contract extension as new projects launch