Remote Senior C Engineer - AI Trainer

SuperAnnotate
CONTRACT Spain, Spain Computer Occupations
Posted:
February 23, 2026
Location:
Spain, Spain, Spain

Job Description

As a Senior C Engineer, you will work remotely on an hourly paid basis to review AI-generated C code, low-level systems designs, and technical explanations, as well as generate high-quality reference implementations and step-by-step reasoning for complex engineering problems. You will assess solutions for accuracy, clarity, safety, and adherence to the prompt; identify errors in logic, memory handling, concurrency, or performance; fact-check technical information; write high-quality explanations and model solutions that demonstrate correct methods; and rate and compare multiple AI responses based on correctness and reasoning quality.
This fully remote, hourly paid contractor role is with SME Careers, a fast-growing AI data services company and subsidiary of SuperAnnotate that provides AI training data to many of the world’s largest AI companies and foundation model labs. Your systems-level C expertise will directly help improve the world’s premier AI models used by millions of devel...

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Job Overview

Job Type: CONTRACT
Location: Spain, Spain
Posted: February 23, 2026
Deadline: April 04, 2026