REMOTE - RL Engineer

RL Engineer — AI Agents & Reinforcement Learning

Location: Remote — LATAM

Compensation: USD $50,000–$150,000/year

Employment Type: Full-Time

Work Schedule: 5.5 days per week, Sundays off, with PST overlap

FitNext Exclusive: No

Company Overview

We’re partnering with an early-stage AI company building high-quality Reinforcement Learning environments and AI agents using proprietary datasets.

With a small team and direct access to the co-founders, this is an opportunity to shape the technical platform and help build the engineering function from the ground up.

The Challenge

As an RL Engineer, you’ll work across two core areas: building RL environments focused on coding tasks and developing AI agents for enterprise customers.

You’ll join as an early engineering hire, working directly with the co-founders on technical direction and product development. As the company grows, you’ll be expected to take on leadership of the engineering team while remaining hands-on.

Key Responsibilities

• Build high-quality coding RL environments using proprietary data and datasets.
• Develop and deploy AI agents for enterprise customers.
• Contribute to architecture, technical direction, and the product roadmap.
• Deliver reliable solutions quickly in an early-stage startup environment.
• Help establish engineering practices and lead the team as it grows.

Must Have

• 3–7 years of software engineering experience with strong Reinforcement Learning fundamentals.
• Hands-on experience with coding RL.
• Previous experience building RL environments at an RL company, or at a human data company with hands-on RL exposure.
• Hands-on experience building and deploying AI agents in production.
• Daily use of AI development tools such as Claude Code, Cursor, or comparable tools.
• Based in LATAM
• Availability to work 5.5 days per week, with Sundays off and overlap with PST working hours.

Nice to Have

• Experience at leading human data companies such as Surge, Mercor, Scalar AI Labs, or similar organizations.
• Full-stack engineering experience with TypeScript and AWS, particularly for marketplace products.
• Experience with iOS, Swift, or React Native.
• Previous experience in early-stage startups with a track record of shipping quickly.

Soft Skills

• Strong ownership and a hands-on approach to problem-solving.
• Ability to work independently and make decisions with limited structure.
• Comfortable adapting to changing priorities in a fast-paced environment.
• Clear communication and close collaboration with founders.
• Ability to balance delivery speed with engineering quality.
• Readiness to take on engineering leadership as the team grows.

Benefits & Opportunities

• Fully remote work.
• Direct collaboration with the co-founders.
• Significant influence over architecture and technical decisions.
• Opportunity to lead the engineering team as the company scales.
• Hands-on work with RL environments, proprietary datasets, and production AI agents.

Interview Process

• Introductory conversation with a co-founder.
• Conversation with the technical co-founder.
• Take-home assignment.
• Technical discussion.
• Remote work trial lasting a couple of days.

The process can be completed in approximately one week.