Remote Backend Engineer for AI-Driven Systems

The Ai Training Company; Polska; Remote; PLN 120,000 - 200,000; Full time

Job summary

The Ai Training Company is seeking experienced Full-Stack Software Engineers, Backend Engineers, and Application Developers to contribute to advanced AI training through real-world software development, debugging, architecture work, and code-evaluation tasks.

You will work across languages and stacks, translating or migrating software, reviewing AI-generated code, and ensuring correctness, security, and performance while delivering robust reference solutions.

Qualifications

• Strong professional experience building and shipping production full-stack applications.
• Meaningful hands-on experience with both frontend and backend engineering.
• Production experience with multiple programming languages
• Experience understanding and contributing to complete software architectures
• Ability to work effectively inside unfamiliar repositories
• Strong debugging and technical problem-solving skills
• Ability to trace failures across multiple application layers
• Experience reading and evaluating code written by other engineers
• Ability to reason about correctness, performance, security, and maintainability
• Strong written communication and technical documentation skills
• Ability to work independently on technically complex tasks

Responsibilities

• Develop and modify backend application components
• Build user-facing features and the APIs, services, and data models that support them
• Trace requests and data through complete application workflows
• Work inside unfamiliar repositories and quickly understand existing architecture
• Diagnose authentication, authorization, persistence, networking, state-management, and deployment issues
• Review and improve software written in multiple programming languages
• Translate full software implementations from one programming language or technology stack into another
• Preserve functionality, behavior, architecture, and edge-case handling during code translation
• Review AI-generated code for correctness, completeness, performance, security, and maintainability
• Identify bugs, missing functionality, architectural weaknesses, and implementation shortcuts
• Refactor existing code while maintaining expected application behavior
• Create technically rigorous reference solutions and validation criteria
• Document technical decisions, assumptions, tradeoffs, and implementation details

Skills

Full-stack development

Backend engineering

API design

GraphQL

REST APIs

CI/CD

Code review

Debugging

Documentation

Multi-language familiarity

Tools

Node.js

Python

Java

.NET

Go

Rust

Docker

Kubernetes

SQL

Job description

The Ai Training Company is seeking experienced Full-Stack Software Engineers, Backend Engineers, and Application Developers to contribute to advanced AI training through real-world software development, debugging, architecture work, and code-evaluation tasks.

You will work across languages and stacks, translating or migrating software, reviewing AI-generated code, and ensuring correctness, security, and performance while delivering robust reference solutions.