Alignerr
Senior C# Full-Stack Engineer — AI Data & Infrastructure
Alignerr, San Francisco, California, United States, 94199
Senior C# Full‑Stack Engineer — AI Data & Infrastructure
at
Alignerr Remote, Contract, 20–40 hours/week. Competitive hourly compensation based on experience. About The Job
Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next‑generation models. We work on real production systems and high‑impact research workflows across data, tooling, and infrastructure. Base Pay Range
$50.00/hr – $75.00/hr Role Responsibilities
Design, build, and optimize high‑performance systems in C# supporting AI data pipelines and evaluation workflows. Develop full‑stack tooling and backend services for large‑scale data annotation, validation, and quality control. Improve reliability, performance, and safety across existing C# codebases. Collaborate with data, research, and engineering teams to support model training and evaluation workflows. Identify bottlenecks and edge cases in data and system behavior, and implement scalable fixes. Participate in synchronous reviews to iterate on system design and implementation decisions. Qualifications
Must‑Have
Native or fluent English speaker. Full‑stack developer experience with a strong systems programming background. 3–5+ years of professional experience writing production C++ with a focus on modern standards. Strong background in performance optimization, concurrency (e.g., threading, atomics), and memory safety. Clear written and verbal communication skills. Ability to commit 20–40 hours per week. Preferred
Prior experience with data annotation, data quality, or evaluation systems. Familiarity with AI/ML workflows, model training, or benchmarking pipelines. Experience with distributed systems or developer tooling. Application Process
Submit your resume. Complete a short technical screening. Project matching and onboarding. Seniority Level
Mid‑Senior level Employment Type
Contract Job Function
Engineering and Information Technology Industries
Technology, Information and Internet
#J-18808-Ljbffr
at
Alignerr Remote, Contract, 20–40 hours/week. Competitive hourly compensation based on experience. About The Job
Alignerr connects top technical experts with leading AI labs to build, evaluate, and improve next‑generation models. We work on real production systems and high‑impact research workflows across data, tooling, and infrastructure. Base Pay Range
$50.00/hr – $75.00/hr Role Responsibilities
Design, build, and optimize high‑performance systems in C# supporting AI data pipelines and evaluation workflows. Develop full‑stack tooling and backend services for large‑scale data annotation, validation, and quality control. Improve reliability, performance, and safety across existing C# codebases. Collaborate with data, research, and engineering teams to support model training and evaluation workflows. Identify bottlenecks and edge cases in data and system behavior, and implement scalable fixes. Participate in synchronous reviews to iterate on system design and implementation decisions. Qualifications
Must‑Have
Native or fluent English speaker. Full‑stack developer experience with a strong systems programming background. 3–5+ years of professional experience writing production C++ with a focus on modern standards. Strong background in performance optimization, concurrency (e.g., threading, atomics), and memory safety. Clear written and verbal communication skills. Ability to commit 20–40 hours per week. Preferred
Prior experience with data annotation, data quality, or evaluation systems. Familiarity with AI/ML workflows, model training, or benchmarking pipelines. Experience with distributed systems or developer tooling. Application Process
Submit your resume. Complete a short technical screening. Project matching and onboarding. Seniority Level
Mid‑Senior level Employment Type
Contract Job Function
Engineering and Information Technology Industries
Technology, Information and Internet
#J-18808-Ljbffr