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C# Infrastructure Engineer - Data Pipelines
Job summary
A leading AI software firm is seeking a Senior C# Full-Stack Engineer in the United Kingdom to design and optimize high-performance systems supporting AI data infrastructure. The role demands strong C# development skills, experience with asynchronous programming, and the ability to communicate effectively. The position offers flexible hours on a contract basis, with a competitive hourly rate ranging from $50 to $75 based on experience. This role is remote and requires collaboration with various teams.
Qualifications
- 5+ years of professional experience writing production C#.
- Experience optimizing I/O-bound operations for data ingestion.
- Full-stack developer experience with systems programming.
Responsibilities
- Design, build, and optimize high-performance systems in C# supporting AI data pipelines.
- Develop tooling and backend services for large-scale data annotation.
- Collaborate with data, research, and engineering teams.
Skills
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.
Senior C# Full‑Stack Engineer — AI Data & Infrastructure
Type: Contract, Remote • Commitment: 20–40 hours/week • Compensation: Competitive, hourly (based on experience)
- 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
- Native or fluent English speaker
- Full‑stack developer experience with a strong systems programming background
- 5+ years of professional experience writing production C#.
- Strong background in building streaming data pipelines using asynchronous streams and reactive programming concepts.
- Experience optimizing I/O‑bound operations and implementing resilient retry policies for distributed data ingestion.
- Clear written and verbal communication skills.
- Ability to commit 20–40 hours per week.
- 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
- Submit your resume
- Complete a short technical screening
- Project matching and onboarding
$50 - $75 an hour
* The salary benchmark is based on the target salaries of market leaders in their relevant sectors. It is intended to serve as a guide to help Premium Members assess open positions and to help in salary negotiations. The salary benchmark is not provided directly by the company, which could be significantly higher or lower.