Remote Full-Stack Engineer — Build AI-Driven Systems

The Ai Training Company; Denmark; Remote; DKK 750,000 - 1,100,000; Full time

Job summary

The Ai Training Company is seeking experienced full-stack engineers to contribute to advanced AI training through real-world software development, debugging, architecture, and code-evaluation tasks.

We welcome professionals with hands-on experience across frontend and backend, multiple languages, API design, and secure, scalable systems. This remote opportunity offers collaboration across unfamiliar repos and demanding projects with rigorous code reviews.

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 frontend and 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

Backend service development

REST APIs

GraphQL APIs

RPC and gRPC services

Server-side applications

Authentication and authorization

Session management

ORM and query layers

Caching

CI/CD

Containerized applications

Observability

Monitoring

Webhooks

Tools

Node.js

Python

Java

.NET

Go

Rust

C#

Job description

The Ai Training Company is seeking experienced full-stack engineers to contribute to advanced AI training through real-world software development, debugging, architecture, and code-evaluation tasks.

We welcome professionals with hands-on experience across frontend and backend, multiple languages, API design, and secure, scalable systems. This remote opportunity offers collaboration across unfamiliar repos and demanding projects with rigorous code reviews.