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Backend & Tooling Engineer

Alignerr · Senior · Remote

About the Role

What 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 and optimize the high-performance systems, data pipelines, and developer tooling that leading AI labs depend on to train and evaluate cutting-edge models.

This is a fully remote contract role for someone who takes genuine pride in writing safe, fast, production-grade Rust — and wants to work on systems where performance and reliability genuinely matter.

Organization: Alignerr
Type: Hourly Contract
Location: Remote
Commitment: 20–40 hours/week

Key Responsibilities:

Design, build, and optimize high-performance systems in that power AI data pipelines and evaluation workflows

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Rust

Develop full-stack backend services and CLI tooling for large-scale data annotation, validation, and quality control

Improve reliability, performance, and safety across existing production Rust codebases

Collaborate closely with data, research, and engineering teams to support model training and evaluation at scale

Identify performance bottlenecks and edge cases in data and system behavior, then implement scalable, robust fixes

Participate in synchronous design reviews to iterate on architecture and implementation decisions

Requirements:

Native or fluent English speaker with clear written and verbal communication skills
5+ years of professional experience writing production-grade Rust
Proven ability to build high-performance backend web services and robust, user-friendly CLI tools
Experienced with type-safe database interactions and connection pooling for handling large-scale data workloads
Detail-oriented and systematic — you think carefully about correctness, edge cases, and system behavior
Able to commit 20–40 hours per week with consistency and reliability

Nice to Have

Prior experience with data annotation, data quality, or evaluation systems
Familiarity with AI/ML workflows, model training pipelines, or benchmarking infrastructure
Experience with distributed systems design or developer tooling ecosystems

Why Join Us

Work on cutting-edge AI projects alongside leading research labs and AI teams
Fully remote and flexible — work when and where it suits you
Freelance autonomy with the structure of meaningful, technically rigorous work
Make a direct, tangible impact on how AI understands and generates systems-level code
Potential for ongoing work and contract extension as new projects launch
Training and onboarding support provided — hit the ground running

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