Competitive Coder for AI Training

About OpenTrain

OpenTrain AI is the hiring and contracting organization for this role and the leading platform for finding and building careers in AI training and data labeling. OpenTrain helps contributors discover specialized projects, build a unified portfolio, and grow their freelance careers in a fast-expanding technology industry.

• Remote contractor opportunity
• Flexible part-time scheduling
• Work with cutting-edge AI training projects
• Create a profile and apply through OpenTrain

About AI Training Work

AI training is the human side of building modern artificial intelligence. Skilled contributors create examples, evaluate model behavior, and develop challenging datasets and environments that help AI systems reason more accurately. This work offers a way for technical specialists to contribute directly to how advanced AI is built.

• Apply your programming expertise to AI development
• Help evaluate and improve model reasoning
• Work remotely with flexible hours
• Build experience in a rapidly growing field

The Role

OpenTrain AI is recruiting a Competitive Coder to create reinforcement learning environments and competitive programming problems for AI training. You will design original problems, write reference solutions, and build robust test suites that evaluate AI model reasoning.

The role also involves developing C++ checkers, validating participant submissions against complex problem statements, and collaborating with the project team to refine requirements and resolve ambiguous scenarios.

• Role type: Part-time contractor
• Estimated duration: 1–3 months
• Estimated schedule: About 15 hours per week
• Listing metadata indicates a time requirement of 20+ hours per week
• Pay: $45–$65 per hour
• Estimated project earnings: $5,400–$7,800 based on the listed schedule and duration
• Language: English
• Location: Worldwide and remote

What You'll Do

You will combine competitive programming expertise with careful test design and technical documentation. Your work will help create reliable environments for assessing how AI models solve complex programming challenges.

• Create reinforcement learning environments that test AI models on complex competitive programming problems
• Design unique custom problems that do not exist on online judges
• Write reference solutions and build robust test suites
• Implement C++ checkers that can evaluate multiple valid outputs
• Validate participant submissions against complex problem statements
• Collaborate with the project team to fine-tune problem requirements
• Clarify ambiguous scenarios and identify important edge cases
• Document checker logic and communicate edge cases in writing and conversation

Required Qualifications

This opportunity is suited to a technically advanced competitive coder who can analyze complex constraints, implement dependable C++ validation logic, and communicate clearly with a remote project team. High-quality, well-documented work and close attention to output consistency are essential.

• Expertise in competitive programming and coding problem analysis
• Advanced proficiency in C++ for implementing robust checker solutions
• Strong analytical ability to interpret complex constraints and multiple solution paths
• Exceptional written and verbal communication skills
• Meticulous attention to detail in code validation and output consistency
• Ability to work independently in a remote, collaborative environment
• Commitment to producing high-quality, well-documented code under tight deadlines

Helpful Background

Experience setting problems, testing submissions, or building checkers for major competitive programming platforms would be helpful. The role is listed at an entry level, but the required technical skills call for substantial competitive programming and C++ capability.

• Prior experience as a problem setter
• Prior experience testing competitive programming solutions
• Prior experience developing checkers on major competitive programming platforms

Why Work With OpenTrain

OpenTrain gives AI training professionals one place to manage opportunities and develop a durable body of work. A strong profile can help you showcase credible experience, find projects aligned with your skills, and build a long-term career portfolio in AI training and data labeling.

• Create a centralized AI training portfolio
• Showcase specialized programming experience
• Discover projects that match your technical background
• Build toward a lasting freelance career in AI training