Backend Engineer

Job Summary

What if your next engineering challenge was proving you're smarter than AI?

As a Software Engineer, you'll spend your days challenging AI-generated code, finding bugs, spotting mistakes in its logic, and solving coding problems that AI struggles with. We’re looking for a Software Developer who enjoys working with different technologies, has experience with legacy systems, and is open to learning new tools and approaches.

This is not a traditional software development role and does not involve writing code. Engineer who can think beyond a single tech stack and is comfortable taking on different types of tasks. You'll basically get paid to break AI and help make it better at writing code.

Requirements

3-4 years of hands-on experience as a Software Developer on commercial projects, including B2B SaaS systems and data-heavy applications.

Use AI tools (AI agents, Claude Code, Cursor, Codex or similar) in daily workflow.

Experience working with existing codebases and unfamiliar repositories

Strong experience with Node.js

Strong knowledge of JavaScript / TypeScript

Experience with backend frameworks such as Express.js or NestJS or Fastify

Good understanding of REST API and backend architecture

Comfortable working with legacy codebases, learning unfamiliar technologies, and switching between different tech stacks depending on project needs.

Ability to independently analyze code and identify bugs or inconsistencies

Strong analytical and problem-solving skills

Upper-Intermediate English (B2)

Key Responsibilities

Work with Frontier Labs, producing training data to train Al models.

Evaluate AI-generated code, technical solutions, and engineering approaches.

Identify bugs, incorrect assumptions, architectural issues, and weak reasoning in AI responses.

Test and evaluate agentic coding models designed to perform complex engineering tasks at a senior developer level.

Compare AI-generated solutions against senior engineering standards and best practices.

Bonus

Computer Science or related education.

Willing to try and learn different backend technologies, including C#,, Ruby, .NET, Python, PHP, Node.js, Go, and Java, even if you haven't worked with them before.

Strong understanding of algorithms and data structures.

Please note that, due to the specific requirements of the project, we are currently unable to consider candidates who are actively working in the iGaming, online gambling, primary focus on cryptocurrency, or closely related industries.