Software Engineer

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Brasil Alignerr Remoto Tempo integral

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Software Engineer (C#) — Internal Tooling (AI Infrastructure)

About The Role
What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for experienced C# full-stack engineers to build the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and benchmark their models. This is a fully remote contract role with flexible hours. You'll work on real production systems — not toy projects — alongside data, research, and engineering teams at the frontier of AI development.
• Organization: Alignerr
• Type: Hourly Contract
•

Location:
Remote
• Commitment: 20–40 hours/week

What You'll Do
• Design, build, and optimize high-performance C# systems 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 robustness 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, then implement scalable, production-ready fixes
• Participate in synchronous design reviews to iterate on architecture and implementation decisions Who You Are
• Native or fluent English speaker with clear written and verbal communication skills
• Full-stack developer with a strong systems programming background
• 3–5+ years of professional experience writing production-grade C#
• Experienced with interoperability scenarios — invoking Python ML models from .
NET, wrapping native libraries, or similar challenges
• Skilled at designing robust benchmarking and performance evaluation harnesses
• Able to commit 20–40 hours per week with reliability and consistency Nice to Have
• Prior experience with data annotation, data quality pipelines, or evaluation systems
• Familiarity with AI/ML workflows, model training, or benchmarking infrastructure
• Experience with distributed systems or developer tooling
• Background working alongside research or data science teams Why Join Us
• Work on cutting-edge AI projects alongside leading research labs
• Fully remote and flexible — work when and where it suits you
• Freelance autonomy with the structure of meaningful, high-impact engineering work
• Make a tangible contribution to the systems that shape how AI models are built and evaluated
• Potential for ongoing work and contract extension as new projects launch

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