Engineering & Development

|

Middle

Senior

Middle

Senior

Brazil

Colombia

El Salvador

|

Brazil

Colombia

El Salvador

August 21, 2026

About the company

First Line Software works with some of the world's top businesses and organisations in industries like healthcare, real estate, data engineering, warehouse automation, retail digitalisation, mobile app development, and e-commerce. Our projects are as varied as our people, and our people are as talented as they come.

We prefer working as a transparent and supportive team, who shares our knowledge as well as our success.

Let's see what we can create together!

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The project and your role

We are looking for an AI Engineer to help us build, evaluate, and productionize AI solutions. You will work on a variety of projects across different industries, creating smart solutions to solve real world problems, from building scalable data pipelines to developing evaluation frameworks for Generative AI and LLM applications.

Key Responsibilities:

• Build and maintain scalable data pipelines and workflows.
• Develop evaluation frameworks for Generative AI and LLM applications.
• Create and maintain golden datasets for model testing.
• Evaluate and benchmark LLM performance.
• Build machine learning-assisted tools to improve delivery and automation.
• Deploy production-ready AI solutions.
• Work closely with delivery teams to solve technical challenges.
• Continuously improve data quality, automation, and operational efficiency.

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Your skills

Your skills:

Essential Qualifications (Must-Haves):

• 5+ years experience in Data Engineering, Machine Learning, AI Engineering, or Data Science.
• Strong Python and SQL skills.
• Hands-on experience with Generative AI and LLMs.
• Experience evaluating LLMs using golden datasets, model benchmarking, or LLM-as-a-Judge techniques.
• Experience building and deploying production-ready machine learning solutions.
• Strong understanding of data pipelines, validation, and quality frameworks.
• Experience integrating APIs and cloud-based AI services.
• Strong problem-solving and analytical skills.
• Comfortable owning solutions end-to-end.
• Excellent communication and stakeholder management skills.
• Experience working in Agile, cross-functional teams.

Desired Skills & Knowledge (Nice-to-Haves):

• Consulting or customer-facing experience.

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What we can offer

What we can offer:

• Our modern stack projects are the right mix of exciting and challenging
• Gain access to our diverse range of training programs, courses, and certifications
• Choose your work style: remote, on-site or hybrid in one of our stunning offices. We offer the freedom of flexible working hours.
• Enhance your language skills with our corporate English classes
• Work from anywhere and explore the world with our Workation program

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Language Proficiency

English

Our Hiring Process

Getting started with us

Here's what you can expect when you send us your application

Step 0

Tech Talent Hunt

Be scouted or apply for your role

Step 1

Meeting & Connecting

Our first step to building lasting relationships

Step 2

Uncovering Potential

Your HR interview

Step 3

The Code Challenge or Technical Interview

It's time to show what you can do best!

Step 4

Client’s Interview

Demonstrating expertise to our future partners

Final

The Last Piece of the Puzzle

Job offer to finalize our tech team

Join our team of innovative thinkers

Let’s talk!

Have any questions? Fill out the form and our team will be in touch!