Backend & Tooling Engineer (Rust)

Backend & Tooling Engineer (Rust) — AI InfrastructureAbout The RoleWhat if your Rust expertise could directly shape the infrastructure powering the next generation of AI? We're looking for a Senior Rust Engineer to build the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and benchmark their most advanced models.This is high-impact, production-grade work — not toy projects or throwaway scripts. You'll be embedded in real engineering workflows, solving hard systems problems alongside data, research, and engineering teams at the frontier of AI development.Organization: AlignerrType: Hourly ContractLocation: RemoteCommitment: 20–40 hours/weekWhat You'll DoDesign, build, and optimize high-performance systems in Rust powering AI data pipelines and evaluation workflowsDevelop full-stack backend services and CLI tooling for large-scale data annotation, validation, and quality controlImprove reliability, safety, and performance across production Rust codebasesCollaborate with data, research, and engineering teams to support model training and evaluation workflowsIdentify bottlenecks and edge cases in data and system behavior — then implement scalable, well-reasoned fixesParticipate in synchronous design and code reviews to iterate on architecture and implementation decisionsWho You AreNative or fluent English speaker with strong written and verbal communication skills5+ years of professional experience writing production Rust — you know the language deeply, not just the basicsProven track record building high-performance backend web services and robust, user-friendly CLI toolsExperienced with type-safe database interactions and connection pooling for large-scale data workloadsAble to commit 20–40 hours per week with reliability and focusSelf-directed and comfortable working asynchronously across a remote teamNice to HavePrior experience with data annotation, data quality pipelines, or model evaluation systemsFamiliarity with AI/ML workflows, model training, or benchmarking infrastructureBackground in distributed systems or developer toolingExperience contributing to or maintaining open-source Rust projectsWhy Join UsWork on real production systems at the cutting edge of AI developmentCollaborate directly with leading AI research labs on high-stakes infrastructureFully remote and async-friendly — work from wherever you do your best workFreelance autonomy with meaningful, technically challenging workPotential for ongoing engagement and expanded scope as projects evolve