Remote AI-Coding Engineer: Train & Vet AI Code

Alignerr Corp.; Madrid; Remote; EUR 49,000 - 99,000; Full time

Job summary

Alignerr is seeking Software Engineers in Madrid for a fully remote, flexible contract role focused on building, evaluating, and improving AI-generated code. You will train AI systems to think like real developers by writing solutions, reviewing outputs, and providing expert feedback that enhances correctness, safety, and reliability.

You will work on hands-on engineering tasks across languages, identify bugs, and design prompts to stress-test AI capabilities while operating asynchronously on

Qualifications

• Proficient in one or more programming languages (Python, JavaScript, Java, C++, Go, TypeScript, or similar).
• Solid understanding of data structures, algorithms, and software design principles.
• Able to read, write, and reason about code with clarity and precision.
• Bachelor's degree in Computer Science, Software Engineering, or related field — or equivalent practical experience.

Responsibilities

• Write, debug, and optimize code across a range of languages, frameworks, and problem domains.
• Review and evaluate AI-generated code for correctness, efficiency, readability, and best practices.
• Identify bugs, logic errors, security issues, and performance bottlenecks in AI outputs.
• Provide structured, detailed feedback explaining why code works — or doesn't.
• Design challenging coding prompts and edge-case scenarios to stress-test AI capabilities.
• Compare and rank multiple AI-generated solutions based on engineering quality.
• Work independently and asynchronously — fully on your own schedule.

Skills

Programming languages

Data structures & algorithms

Code reasoning & debugging

Written communication

Independent work

Education

Bachelor's degree in CS/Software Eng

Job description

Alignerr is seeking Software Engineers in Madrid for a fully remote, flexible contract role focused on building, evaluating, and improving AI-generated code. You will train AI systems to think like real developers by writing solutions, reviewing outputs, and providing expert feedback that enhances correctness, safety, and reliability.

You will work on hands-on engineering tasks across languages, identify bugs, and design prompts to stress-test AI capabilities while operating asynchronously on