Senior Rust Engineer — AI Data Infrastructure
About The Role
What if your mastery of Rust could directly shape the infrastructure that powers the world's most advanced AI systems? We're looking for a Senior Rust Full-Stack Engineer to build, optimize, and scale the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on — every single day.
This is a fully remote contract role for engineers who think deeply about performance, care about correctness, and want their work to matter at scale.
Organization: Alignerr
Type: Hourly Contract
Location: Remote
Commitment: 20–40 hours/week
What You'll Do
Design and build high-performance, production-grade systems in Rust that underpin AI data pipelines and evaluation workflows
Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control
Identify and eliminate bottlenecks — from memory layout issues to concurrency inefficiencies — and implement scalable, lasting fixes
Improve reliability, safety, and performance across existing Rust codebases
Collaborate closely with data, research, and engineering teams to support model training and evaluation at scale
Participate in synchronous design reviews and iterate on system architecture with sharp, opinionated engineers
Who You Are
5+ years of professional experience writing production Rust — this is not a learning opportunity, it's a mastery showcase
Deep expertise in data parallelism and concurrency patterns to maximize CPU saturation
Thorough understanding of memory layout, SIMD optimizations, and heap allocation minimization — you find and fix performance issues others miss
Native or fluent English speaker with clear, precise written and verbal communication
Able to commit 20–40 hours per week with consistency and professionalism
Self-directed and dependable — you deliver without hand-holding
Nice to Have
Prior experience with data annotation, data quality pipelines, or AI evaluation systems
Familiarity with AI/ML workflows, model training pipelines, or benchmarking infrastructure
Experience with distributed systems or developer tooling at scale
Why Join Us
Work directly with leading AI research labs on systems that matter in production — not toy projects
Fully remote and async-friendly — work from wherever you do your best thinking
High-autonomy contract work with the depth and challenge of a senior engineering role
Collaborate with a technically sharp, mission-driven team pushing the frontier of AI infrastructure
Ongoing work and contract extension available as projects grow and new ones launch